This file is indexed.

/usr/share/doc/zsh-common/html/Options.html is in zsh-doc 5.0.2-3ubuntu6.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

   1
   2
   3
   4
   5
   6
   7
   8
   9
  10
  11
  12
  13
  14
  15
  16
  17
  18
  19
  20
  21
  22
  23
  24
  25
  26
  27
  28
  29
  30
  31
  32
  33
  34
  35
  36
  37
  38
  39
  40
  41
  42
  43
  44
  45
  46
  47
  48
  49
  50
  51
  52
  53
  54
  55
  56
  57
  58
  59
  60
  61
  62
  63
  64
  65
  66
  67
  68
  69
  70
  71
  72
  73
  74
  75
  76
  77
  78
  79
  80
  81
  82
  83
  84
  85
  86
  87
  88
  89
  90
  91
  92
  93
  94
  95
  96
  97
  98
  99
 100
 101
 102
 103
 104
 105
 106
 107
 108
 109
 110
 111
 112
 113
 114
 115
 116
 117
 118
 119
 120
 121
 122
 123
 124
 125
 126
 127
 128
 129
 130
 131
 132
 133
 134
 135
 136
 137
 138
 139
 140
 141
 142
 143
 144
 145
 146
 147
 148
 149
 150
 151
 152
 153
 154
 155
 156
 157
 158
 159
 160
 161
 162
 163
 164
 165
 166
 167
 168
 169
 170
 171
 172
 173
 174
 175
 176
 177
 178
 179
 180
 181
 182
 183
 184
 185
 186
 187
 188
 189
 190
 191
 192
 193
 194
 195
 196
 197
 198
 199
 200
 201
 202
 203
 204
 205
 206
 207
 208
 209
 210
 211
 212
 213
 214
 215
 216
 217
 218
 219
 220
 221
 222
 223
 224
 225
 226
 227
 228
 229
 230
 231
 232
 233
 234
 235
 236
 237
 238
 239
 240
 241
 242
 243
 244
 245
 246
 247
 248
 249
 250
 251
 252
 253
 254
 255
 256
 257
 258
 259
 260
 261
 262
 263
 264
 265
 266
 267
 268
 269
 270
 271
 272
 273
 274
 275
 276
 277
 278
 279
 280
 281
 282
 283
 284
 285
 286
 287
 288
 289
 290
 291
 292
 293
 294
 295
 296
 297
 298
 299
 300
 301
 302
 303
 304
 305
 306
 307
 308
 309
 310
 311
 312
 313
 314
 315
 316
 317
 318
 319
 320
 321
 322
 323
 324
 325
 326
 327
 328
 329
 330
 331
 332
 333
 334
 335
 336
 337
 338
 339
 340
 341
 342
 343
 344
 345
 346
 347
 348
 349
 350
 351
 352
 353
 354
 355
 356
 357
 358
 359
 360
 361
 362
 363
 364
 365
 366
 367
 368
 369
 370
 371
 372
 373
 374
 375
 376
 377
 378
 379
 380
 381
 382
 383
 384
 385
 386
 387
 388
 389
 390
 391
 392
 393
 394
 395
 396
 397
 398
 399
 400
 401
 402
 403
 404
 405
 406
 407
 408
 409
 410
 411
 412
 413
 414
 415
 416
 417
 418
 419
 420
 421
 422
 423
 424
 425
 426
 427
 428
 429
 430
 431
 432
 433
 434
 435
 436
 437
 438
 439
 440
 441
 442
 443
 444
 445
 446
 447
 448
 449
 450
 451
 452
 453
 454
 455
 456
 457
 458
 459
 460
 461
 462
 463
 464
 465
 466
 467
 468
 469
 470
 471
 472
 473
 474
 475
 476
 477
 478
 479
 480
 481
 482
 483
 484
 485
 486
 487
 488
 489
 490
 491
 492
 493
 494
 495
 496
 497
 498
 499
 500
 501
 502
 503
 504
 505
 506
 507
 508
 509
 510
 511
 512
 513
 514
 515
 516
 517
 518
 519
 520
 521
 522
 523
 524
 525
 526
 527
 528
 529
 530
 531
 532
 533
 534
 535
 536
 537
 538
 539
 540
 541
 542
 543
 544
 545
 546
 547
 548
 549
 550
 551
 552
 553
 554
 555
 556
 557
 558
 559
 560
 561
 562
 563
 564
 565
 566
 567
 568
 569
 570
 571
 572
 573
 574
 575
 576
 577
 578
 579
 580
 581
 582
 583
 584
 585
 586
 587
 588
 589
 590
 591
 592
 593
 594
 595
 596
 597
 598
 599
 600
 601
 602
 603
 604
 605
 606
 607
 608
 609
 610
 611
 612
 613
 614
 615
 616
 617
 618
 619
 620
 621
 622
 623
 624
 625
 626
 627
 628
 629
 630
 631
 632
 633
 634
 635
 636
 637
 638
 639
 640
 641
 642
 643
 644
 645
 646
 647
 648
 649
 650
 651
 652
 653
 654
 655
 656
 657
 658
 659
 660
 661
 662
 663
 664
 665
 666
 667
 668
 669
 670
 671
 672
 673
 674
 675
 676
 677
 678
 679
 680
 681
 682
 683
 684
 685
 686
 687
 688
 689
 690
 691
 692
 693
 694
 695
 696
 697
 698
 699
 700
 701
 702
 703
 704
 705
 706
 707
 708
 709
 710
 711
 712
 713
 714
 715
 716
 717
 718
 719
 720
 721
 722
 723
 724
 725
 726
 727
 728
 729
 730
 731
 732
 733
 734
 735
 736
 737
 738
 739
 740
 741
 742
 743
 744
 745
 746
 747
 748
 749
 750
 751
 752
 753
 754
 755
 756
 757
 758
 759
 760
 761
 762
 763
 764
 765
 766
 767
 768
 769
 770
 771
 772
 773
 774
 775
 776
 777
 778
 779
 780
 781
 782
 783
 784
 785
 786
 787
 788
 789
 790
 791
 792
 793
 794
 795
 796
 797
 798
 799
 800
 801
 802
 803
 804
 805
 806
 807
 808
 809
 810
 811
 812
 813
 814
 815
 816
 817
 818
 819
 820
 821
 822
 823
 824
 825
 826
 827
 828
 829
 830
 831
 832
 833
 834
 835
 836
 837
 838
 839
 840
 841
 842
 843
 844
 845
 846
 847
 848
 849
 850
 851
 852
 853
 854
 855
 856
 857
 858
 859
 860
 861
 862
 863
 864
 865
 866
 867
 868
 869
 870
 871
 872
 873
 874
 875
 876
 877
 878
 879
 880
 881
 882
 883
 884
 885
 886
 887
 888
 889
 890
 891
 892
 893
 894
 895
 896
 897
 898
 899
 900
 901
 902
 903
 904
 905
 906
 907
 908
 909
 910
 911
 912
 913
 914
 915
 916
 917
 918
 919
 920
 921
 922
 923
 924
 925
 926
 927
 928
 929
 930
 931
 932
 933
 934
 935
 936
 937
 938
 939
 940
 941
 942
 943
 944
 945
 946
 947
 948
 949
 950
 951
 952
 953
 954
 955
 956
 957
 958
 959
 960
 961
 962
 963
 964
 965
 966
 967
 968
 969
 970
 971
 972
 973
 974
 975
 976
 977
 978
 979
 980
 981
 982
 983
 984
 985
 986
 987
 988
 989
 990
 991
 992
 993
 994
 995
 996
 997
 998
 999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
1396
1397
1398
1399
1400
1401
1402
1403
1404
1405
1406
1407
1408
1409
1410
1411
1412
1413
1414
1415
1416
1417
1418
1419
1420
1421
1422
1423
1424
1425
1426
1427
1428
1429
1430
1431
1432
1433
1434
1435
1436
1437
1438
1439
1440
1441
1442
1443
1444
1445
1446
1447
1448
1449
1450
1451
1452
1453
1454
1455
1456
1457
1458
1459
1460
1461
1462
1463
1464
1465
1466
1467
1468
1469
1470
1471
1472
1473
1474
1475
1476
1477
1478
1479
1480
1481
1482
1483
1484
1485
1486
1487
1488
1489
1490
1491
1492
1493
1494
1495
1496
1497
1498
1499
1500
1501
1502
1503
1504
1505
1506
1507
1508
1509
1510
1511
1512
1513
1514
1515
1516
1517
1518
1519
1520
1521
1522
1523
1524
1525
1526
1527
1528
1529
1530
1531
1532
1533
1534
1535
1536
1537
1538
1539
1540
1541
1542
1543
1544
1545
1546
1547
1548
1549
1550
1551
1552
1553
1554
1555
1556
1557
1558
1559
1560
1561
1562
1563
1564
1565
1566
1567
1568
1569
1570
1571
1572
1573
1574
1575
1576
1577
1578
1579
1580
1581
1582
1583
1584
1585
1586
1587
1588
1589
1590
1591
1592
1593
1594
1595
1596
1597
1598
1599
1600
1601
1602
1603
1604
1605
1606
1607
1608
1609
1610
1611
1612
1613
1614
1615
1616
1617
1618
1619
1620
1621
1622
1623
1624
1625
1626
1627
1628
1629
1630
1631
1632
1633
1634
1635
1636
1637
1638
1639
1640
1641
1642
1643
1644
1645
1646
1647
1648
1649
1650
1651
1652
1653
1654
1655
1656
1657
1658
1659
1660
1661
1662
1663
1664
1665
1666
1667
1668
1669
1670
1671
1672
1673
1674
1675
1676
1677
1678
1679
1680
1681
1682
1683
1684
1685
1686
1687
1688
1689
1690
1691
1692
1693
1694
1695
1696
1697
1698
1699
1700
1701
1702
1703
1704
1705
1706
1707
1708
1709
1710
1711
1712
1713
1714
1715
1716
1717
1718
1719
1720
1721
1722
1723
1724
1725
1726
1727
1728
1729
1730
1731
1732
1733
1734
1735
1736
1737
1738
1739
1740
1741
1742
1743
1744
1745
1746
1747
1748
1749
1750
1751
1752
1753
1754
1755
1756
1757
1758
1759
1760
1761
1762
1763
1764
1765
1766
1767
1768
1769
1770
1771
1772
1773
1774
1775
1776
1777
1778
1779
1780
1781
1782
1783
1784
1785
1786
1787
1788
1789
1790
1791
1792
1793
1794
1795
1796
1797
1798
1799
1800
1801
1802
1803
1804
1805
1806
1807
1808
1809
1810
1811
1812
1813
1814
1815
1816
1817
1818
1819
1820
1821
1822
1823
1824
1825
1826
1827
1828
1829
1830
1831
1832
1833
1834
1835
1836
1837
1838
1839
1840
1841
1842
1843
1844
1845
1846
1847
1848
1849
1850
1851
1852
1853
1854
1855
1856
1857
1858
1859
1860
1861
1862
1863
1864
1865
1866
1867
1868
1869
1870
1871
1872
1873
1874
1875
1876
1877
1878
1879
1880
1881
1882
1883
1884
1885
1886
1887
1888
1889
1890
1891
1892
1893
1894
1895
1896
1897
1898
1899
1900
1901
1902
1903
1904
1905
1906
1907
1908
1909
1910
1911
1912
1913
1914
1915
1916
1917
1918
1919
1920
1921
1922
1923
1924
1925
1926
1927
1928
1929
1930
1931
1932
1933
1934
1935
1936
1937
1938
1939
1940
1941
1942
1943
1944
1945
1946
1947
1948
1949
1950
1951
1952
1953
1954
1955
1956
1957
1958
1959
1960
1961
1962
1963
1964
1965
1966
1967
1968
1969
1970
1971
1972
1973
1974
1975
1976
1977
1978
1979
1980
1981
1982
1983
1984
1985
1986
1987
1988
1989
1990
1991
1992
1993
1994
1995
1996
1997
1998
1999
2000
2001
2002
2003
2004
2005
2006
2007
2008
2009
2010
2011
2012
2013
2014
2015
2016
2017
2018
2019
2020
2021
2022
2023
2024
2025
2026
2027
2028
2029
2030
2031
2032
2033
2034
2035
2036
2037
2038
2039
2040
2041
2042
2043
2044
2045
2046
2047
2048
2049
2050
2051
2052
2053
2054
2055
2056
2057
2058
2059
2060
2061
2062
2063
2064
2065
2066
2067
2068
2069
2070
2071
2072
2073
2074
2075
2076
2077
2078
2079
2080
2081
2082
2083
2084
2085
2086
2087
2088
2089
2090
2091
2092
2093
2094
2095
2096
2097
2098
2099
2100
2101
2102
2103
2104
2105
2106
2107
2108
2109
2110
2111
2112
2113
2114
2115
2116
2117
2118
2119
2120
2121
2122
2123
2124
2125
2126
2127
2128
2129
2130
2131
2132
2133
2134
2135
2136
2137
2138
2139
2140
2141
2142
2143
2144
2145
2146
2147
2148
2149
2150
2151
2152
2153
2154
2155
2156
2157
2158
2159
2160
2161
2162
2163
2164
2165
2166
2167
2168
2169
2170
2171
2172
2173
2174
2175
2176
2177
2178
2179
2180
2181
2182
2183
2184
2185
2186
2187
2188
2189
2190
2191
2192
2193
2194
2195
2196
2197
2198
2199
2200
2201
2202
2203
2204
2205
2206
2207
2208
2209
2210
2211
2212
2213
2214
2215
2216
2217
2218
2219
2220
2221
2222
2223
2224
2225
2226
2227
2228
2229
2230
2231
2232
2233
2234
2235
2236
2237
2238
2239
2240
2241
2242
2243
2244
2245
2246
2247
2248
2249
2250
2251
2252
2253
2254
2255
2256
2257
2258
2259
2260
2261
2262
2263
2264
2265
2266
2267
2268
2269
2270
2271
2272
2273
2274
2275
2276
2277
2278
2279
2280
2281
2282
2283
2284
2285
2286
2287
2288
2289
2290
2291
2292
2293
2294
2295
2296
2297
2298
2299
2300
2301
2302
2303
2304
2305
2306
2307
2308
2309
2310
2311
2312
2313
2314
2315
2316
2317
2318
2319
2320
2321
2322
2323
2324
2325
2326
2327
2328
2329
2330
2331
2332
2333
2334
2335
2336
2337
2338
2339
2340
2341
2342
2343
2344
2345
2346
2347
2348
2349
2350
2351
2352
2353
2354
2355
2356
2357
2358
2359
2360
2361
2362
2363
2364
2365
2366
2367
2368
2369
2370
2371
2372
2373
2374
2375
2376
2377
2378
2379
2380
2381
2382
2383
2384
2385
2386
2387
2388
2389
2390
2391
2392
2393
2394
2395
2396
2397
2398
2399
2400
2401
2402
2403
2404
2405
2406
2407
2408
2409
2410
2411
2412
2413
2414
2415
2416
2417
2418
2419
2420
2421
2422
2423
2424
2425
2426
2427
2428
2429
2430
2431
2432
2433
2434
2435
2436
2437
2438
2439
2440
2441
2442
2443
2444
2445
2446
2447
2448
2449
2450
2451
2452
2453
2454
2455
2456
2457
2458
2459
2460
2461
2462
2463
2464
2465
2466
2467
2468
2469
2470
2471
2472
2473
2474
2475
2476
2477
2478
2479
2480
2481
2482
2483
2484
2485
2486
2487
2488
2489
2490
2491
2492
2493
2494
2495
2496
2497
2498
2499
2500
2501
2502
2503
2504
2505
2506
2507
2508
2509
2510
2511
2512
2513
2514
2515
2516
2517
2518
2519
2520
2521
2522
2523
2524
2525
2526
2527
2528
2529
2530
2531
2532
2533
2534
2535
2536
2537
2538
2539
2540
2541
2542
2543
2544
2545
2546
2547
2548
2549
2550
2551
2552
2553
2554
2555
2556
2557
2558
2559
2560
2561
2562
2563
2564
2565
2566
2567
2568
2569
2570
2571
2572
2573
2574
2575
2576
2577
2578
2579
2580
2581
2582
2583
2584
2585
2586
2587
2588
2589
2590
2591
2592
2593
2594
2595
2596
2597
2598
2599
2600
2601
2602
2603
2604
2605
2606
2607
2608
2609
2610
2611
2612
2613
2614
2615
2616
2617
2618
2619
2620
2621
2622
2623
2624
2625
2626
2627
2628
2629
2630
2631
2632
2633
2634
2635
2636
2637
2638
2639
2640
2641
2642
2643
2644
2645
2646
2647
2648
2649
2650
2651
2652
2653
2654
2655
2656
2657
2658
2659
2660
2661
2662
2663
2664
2665
2666
2667
2668
2669
2670
2671
2672
2673
2674
2675
2676
2677
2678
2679
2680
2681
2682
2683
2684
2685
2686
2687
2688
2689
2690
2691
2692
2693
2694
2695
2696
2697
2698
2699
2700
2701
2702
2703
2704
2705
2706
2707
2708
2709
2710
2711
2712
2713
2714
2715
2716
2717
2718
2719
2720
2721
2722
2723
2724
2725
2726
2727
2728
2729
2730
2731
2732
2733
2734
2735
2736
2737
2738
2739
2740
2741
2742
2743
2744
2745
2746
2747
2748
2749
2750
2751
2752
2753
2754
2755
2756
2757
2758
2759
2760
2761
2762
2763
2764
2765
2766
2767
2768
2769
2770
2771
2772
2773
2774
2775
2776
2777
2778
2779
2780
2781
2782
2783
2784
2785
2786
2787
2788
2789
2790
2791
2792
2793
2794
2795
2796
2797
2798
2799
2800
2801
2802
2803
2804
2805
2806
2807
2808
2809
2810
2811
2812
2813
2814
2815
2816
2817
2818
2819
2820
2821
2822
2823
2824
2825
2826
2827
2828
2829
2830
2831
2832
2833
2834
2835
2836
2837
2838
2839
2840
2841
2842
2843
2844
2845
2846
2847
2848
2849
2850
2851
2852
2853
2854
2855
2856
2857
2858
2859
2860
2861
2862
2863
2864
2865
2866
2867
2868
2869
2870
2871
2872
2873
2874
2875
2876
2877
2878
2879
2880
2881
2882
2883
2884
2885
2886
2887
2888
2889
2890
2891
2892
2893
2894
2895
2896
2897
2898
2899
2900
2901
2902
2903
2904
2905
2906
2907
2908
2909
2910
2911
2912
2913
2914
2915
2916
2917
2918
2919
2920
2921
2922
2923
2924
2925
2926
2927
2928
2929
2930
2931
2932
2933
2934
2935
2936
2937
2938
2939
2940
2941
2942
2943
2944
2945
2946
2947
2948
2949
2950
2951
2952
2953
2954
2955
2956
2957
2958
2959
2960
2961
2962
2963
2964
2965
2966
2967
2968
2969
2970
2971
2972
2973
2974
2975
2976
2977
2978
2979
2980
2981
2982
2983
2984
2985
2986
2987
2988
2989
2990
2991
2992
2993
2994
2995
2996
2997
2998
2999
3000
3001
3002
3003
3004
3005
3006
3007
3008
3009
3010
3011
3012
3013
3014
3015
3016
3017
3018
3019
3020
3021
3022
3023
3024
3025
3026
3027
3028
3029
3030
3031
3032
3033
3034
3035
3036
3037
3038
3039
3040
3041
3042
3043
3044
3045
3046
3047
3048
3049
3050
3051
3052
3053
3054
3055
3056
3057
3058
3059
3060
3061
3062
3063
3064
3065
3066
3067
3068
3069
3070
3071
3072
3073
3074
3075
3076
3077
3078
3079
3080
3081
3082
3083
3084
3085
3086
3087
3088
3089
3090
3091
3092
3093
3094
3095
3096
3097
3098
3099
3100
3101
3102
3103
3104
3105
3106
3107
3108
3109
3110
3111
3112
3113
3114
3115
3116
3117
3118
3119
3120
3121
3122
3123
3124
3125
3126
3127
3128
3129
3130
3131
3132
3133
3134
3135
3136
3137
3138
3139
3140
3141
3142
3143
3144
3145
3146
3147
3148
3149
3150
3151
3152
3153
3154
3155
3156
3157
3158
3159
3160
3161
3162
3163
3164
3165
3166
3167
3168
3169
3170
3171
3172
3173
3174
3175
3176
3177
3178
3179
3180
3181
3182
3183
3184
3185
3186
3187
3188
3189
3190
3191
3192
3193
3194
3195
3196
3197
3198
3199
3200
3201
3202
3203
3204
3205
3206
3207
3208
3209
3210
3211
3212
3213
3214
3215
3216
3217
3218
3219
3220
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html401/loose.dtd">
<html>
<!-- Created on December 21, 2012 by texi2html 1.82
texi2html was written by: 
            Lionel Cons <Lionel.Cons@cern.ch> (original author)
            Karl Berry  <karl@freefriends.org>
            Olaf Bachmann <obachman@mathematik.uni-kl.de>
            and many others.
Maintained by: Many creative people.
Send bugs and suggestions to <texi2html-bug@nongnu.org>
-->
<head>
<title>zsh: 16. Options</title>

<meta name="description" content="zsh: 16. Options">
<meta name="keywords" content="zsh: 16. Options">
<meta name="resource-type" content="document">
<meta name="distribution" content="global">
<meta name="Generator" content="texi2html 1.82">
<meta http-equiv="Content-Type" content="text/html; charset=utf-8">
<style type="text/css">
<!--
a.summary-letter {text-decoration: none}
blockquote.smallquotation {font-size: smaller}
pre.display {font-family: serif}
pre.format {font-family: serif}
pre.menu-comment {font-family: serif}
pre.menu-preformatted {font-family: serif}
pre.smalldisplay {font-family: serif; font-size: smaller}
pre.smallexample {font-size: smaller}
pre.smallformat {font-family: serif; font-size: smaller}
pre.smalllisp {font-size: smaller}
span.roman {font-family:serif; font-weight:normal;}
span.sansserif {font-family:sans-serif; font-weight:normal;}
ul.toc {list-style: none}
-->
</style>


</head>

<body lang="en" bgcolor="#FFFFFF" text="#000000" link="#0000FF" vlink="#800080" alink="#FF0000">

<a name="Options"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="Parameters.html#Parameters-Used-By-The-Shell" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#Specifying-Options" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="Parameters.html#Parameters" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="zsh.html#Top" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="Shell-Builtin-Commands.html#Shell-Builtin-Commands" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="zsh.html#Top" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="zsh_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="Concept-Index.html#Concept-Index" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="zsh_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>

<a name="Options-1"></a>
<h1 class="chapter">16. Options</h1>
<a name="index-options"></a>
<table class="menu" border="0" cellspacing="0">
<tr><td align="left" valign="top"><a href="#Specifying-Options">16.1 Specifying Options</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="#Description-of-Options">16.2 Description of Options</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="#Option-Aliases">16.3 Option Aliases</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
<tr><td align="left" valign="top"><a href="#Single-Letter-Options">16.4 Single Letter Options</a></td><td>&nbsp;&nbsp;</td><td align="left" valign="top">
</td></tr>
</table>
<hr size="6">
<a name="Specifying-Options"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#Options" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#Description-of-Options" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#Options" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#Options" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="Shell-Builtin-Commands.html#Shell-Builtin-Commands" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="zsh.html#Top" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="zsh_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="Concept-Index.html#Concept-Index" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="zsh_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>

<a name="Specifying-Options-1"></a>
<h2 class="section">16.1 Specifying Options</h2>
<a name="index-options_002c-specifying"></a>
<p>Options are primarily referred to by name.
These names are case insensitive and underscores are ignored.
For example, &lsquo;<tt>allexport</tt>&rsquo; is equivalent to &lsquo;<tt>A__lleXP_ort</tt>&rsquo;.
</p>
<p>The sense of an option name may be inverted by preceding it with
&lsquo;<tt>no</tt>&rsquo;, so &lsquo;<tt>setopt No_Beep</tt>&rsquo; is equivalent to &lsquo;<tt>unsetopt beep</tt>&rsquo;.
This inversion can only be done once, so &lsquo;<tt>nonobeep</tt>&rsquo; is <em>not</em>
a synonym for &lsquo;<tt>beep</tt>&rsquo;.  Similarly, &lsquo;<tt>tify</tt>&rsquo; is not a synonym for
&lsquo;<tt>nonotify</tt>&rsquo; (the inversion of &lsquo;<tt>notify</tt>&rsquo;).
</p>
<p>Some options also have one or more single letter names.
There are two sets of single letter options: one used by default,
and another used to emulate <cite>sh</cite>/<cite>ksh</cite> (used when the
<tt>SH_OPTION_LETTERS</tt> option is set).
The single letter options can be used on the shell command line,
or with the <tt>set</tt>, <tt>setopt</tt> and <tt>unsetopt</tt>
builtins, as normal Unix options preceded by &lsquo;<tt>-</tt>&rsquo;.
</p>
<p>The sense of the single letter options may be inverted by using
&lsquo;<tt>+</tt>&rsquo; instead of &lsquo;<tt>-</tt>&rsquo;.
Some of the single letter option names refer to an option being off,
in which case the inversion of that name refers to the option being on.
For example, &lsquo;<tt>+n</tt>&rsquo; is the short name of &lsquo;<tt>exec</tt>&rsquo;, and
&lsquo;<tt>-n</tt>&rsquo; is the short name of its inversion, &lsquo;<tt>noexec</tt>&rsquo;.
</p>
<p>In strings of single letter options supplied to the shell at startup,
trailing whitespace will be ignored; for example the string &lsquo;<tt>-f    </tt>&rsquo;
will be treated just as &lsquo;<tt>-f</tt>&rsquo;, but the string &lsquo;<tt>-f i</tt>&rsquo; is an error.
This is because many systems which implement the &lsquo;<tt>#!</tt>&rsquo; mechanism for
calling scripts do not strip trailing whitespace.
</p>
<hr size="6">
<a name="Description-of-Options"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#Specifying-Options" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#Changing-Directories" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#Options" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#Options" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="Shell-Builtin-Commands.html#Shell-Builtin-Commands" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="zsh.html#Top" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="zsh_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="Concept-Index.html#Concept-Index" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="zsh_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>

<a name="Description-of-Options-1"></a>
<h2 class="section">16.2 Description of Options</h2>
<a name="index-options_002c-description"></a>
<p>In the following list, options set by default in all emulations are marked
&lt;D&gt;; those set by default only in csh, ksh, sh, or zsh emulations are marked
&lt;C&gt;, &lt;K&gt;, &lt;S&gt;, &lt;Z&gt; as appropriate.  When listing options (by &lsquo;<tt>setopt</tt>&rsquo;,
&lsquo;<tt>unsetopt</tt>&rsquo;, &lsquo;<tt>set -o</tt>&rsquo; or &lsquo;<tt>set +o</tt>&rsquo;), those turned on by default
appear in the list prefixed with &lsquo;<tt>no</tt>&rsquo;.  Hence (unless
<tt>KSH_OPTION_PRINT</tt> is set), &lsquo;<tt>setopt</tt>&rsquo; shows all options whose settings
are changed from the default.
</p>

<hr size="6">
<a name="Changing-Directories"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#Description-of-Options" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#Completion-4" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#Options" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#Description-of-Options" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="Shell-Builtin-Commands.html#Shell-Builtin-Commands" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="zsh.html#Top" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="zsh_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="Concept-Index.html#Concept-Index" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="zsh_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h3 class="subsection">16.2.1 Changing Directories</h3>
<dl compact="compact">
<dd><a name="index-AUTO_005fCD"></a>
<a name="index-NO_005fAUTO_005fCD"></a>
<a name="index-AUTOCD"></a>
<a name="index-NOAUTOCD"></a>
<a name="index-cd_002c-automatic"></a>
</dd>
<dt> <tt>AUTO_CD</tt> (<tt>-J</tt>)</dt>
<dd><p>If a command is issued that can&rsquo;t be executed as a normal command,
and the command is the name of a directory, perform the <tt>cd</tt>
command to that directory.
</p>
<a name="index-AUTO_005fPUSHD"></a>
<a name="index-NO_005fAUTO_005fPUSHD"></a>
<a name="index-AUTOPUSHD"></a>
<a name="index-NOAUTOPUSHD"></a>
<a name="index-cd_002c-behaving-like-pushd"></a>
<a name="index-pushd_002c-making-cd-behave-like"></a>
</dd>
<dt> <tt>AUTO_PUSHD</tt> (<tt>-N</tt>)</dt>
<dd><p>Make <tt>cd</tt> push the old directory onto the directory stack.
</p>
<a name="index-CDABLE_005fVARS"></a>
<a name="index-NO_005fCDABLE_005fVARS"></a>
<a name="index-CDABLEVARS"></a>
<a name="index-NOCDABLEVARS"></a>
<a name="index-cd_002c-to-parameter"></a>
</dd>
<dt> <tt>CDABLE_VARS</tt> (<tt>-T</tt>)</dt>
<dd><p>If the argument to a <tt>cd</tt> command (or an implied <tt>cd</tt> with the
<tt>AUTO_CD</tt> option set) is not a directory, and does not begin with a
slash, try to expand the expression as if it were preceded by a &lsquo;<tt>~</tt>&rsquo; (see
<a href="Expansion.html#Filename-Expansion">Filename Expansion</a>).
</p>
<a name="index-CHASE_005fDOTS"></a>
<a name="index-NO_005fCHASE_005fDOTS"></a>
<a name="index-CHASEDOTS"></a>
<a name="index-NOCHASEDOTS"></a>
<a name="index-cd_002c-with-_002e_002e-in-argument"></a>
</dd>
<dt> <tt>CHASE_DOTS</tt></dt>
<dd><p>When changing to a directory containing a path segment &lsquo;<tt>..</tt>&rsquo; which would
otherwise be treated as canceling the previous segment in the path (in
other words, &lsquo;<tt>foo/..</tt>&rsquo; would be removed from the path, or if &lsquo;<tt>..</tt>&rsquo; is
the first part of the path, the last part of the current working directory
would be removed), instead resolve the path to the physical directory.
This option is overridden by <tt>CHASE_LINKS</tt>.
</p>
<p>For example, suppose <tt>/foo/bar</tt> is a link to the directory <tt>/alt/rod</tt>.
Without this option set, &lsquo;<tt>cd /foo/bar/..</tt>&rsquo; changes to <tt>/foo</tt>; with it
set, it changes to <tt>/alt</tt>.  The same applies if the current directory
is <tt>/foo/bar</tt> and &lsquo;<tt>cd ..</tt>&rsquo; is used.  Note that all other symbolic
links in the path will also be resolved.
</p>
<a name="index-CHASE_005fLINKS"></a>
<a name="index-NO_005fCHASE_005fLINKS"></a>
<a name="index-CHASELINKS"></a>
<a name="index-NOCHASELINKS"></a>
<a name="index-links_002c-symbolic"></a>
<a name="index-symbolic-links"></a>
</dd>
<dt> <tt>CHASE_LINKS</tt> (<tt>-w</tt>)</dt>
<dd><p>Resolve symbolic links to their true values when changing directory.
This also has the effect of <tt>CHASE_DOTS</tt>, i.e. a &lsquo;<tt>..</tt>&rsquo; path segment
will be treated as referring to the physical parent, even if the preceding
path segment is a symbolic link.
</p>
<a name="index-POSIX_005fCD"></a>
<a name="index-POSIXCD"></a>
<a name="index-NO_005fPOSIX_005fCD"></a>
<a name="index-NOPOSIXCD"></a>
<a name="index-CDPATH_002c-order-of-checking"></a>
</dd>
<dt> <tt>POSIX_CD</tt></dt>
<dd><p>Modifies the behaviour of <tt>cd</tt>, <tt>chdir</tt> and <tt>pushd</tt> commands
to make them more compatible with the POSIX standard. The behaviour with
the option unset is described in the documentation for the <tt>cd</tt>
builtin in
<a href="Shell-Builtin-Commands.html#Shell-Builtin-Commands">Shell Builtin Commands</a>.
If the option is set, the shell does not test for directories beneath
the local directory (&lsquo;<tt>.</tt>&rsquo;) until after all directories in <tt>cdpath</tt>
have been tested.
</p>
<p>Also, if the option is set, the conditions under which the shell
prints the new directory after changing to it are modified.  It is
no longer restricted to interactive shells (although printing of
the directory stack with <tt>pushd</tt> is still limited to interactive
shells); and any use of a component of <tt>CDPATH</tt>, including a &lsquo;<tt>.</tt>&rsquo; but
excluding an empty component that is otherwise treated as &lsquo;<tt>.</tt>&rsquo;, causes
the directory to be printed.
</p>
<a name="index-PUSHD_005fIGNORE_005fDUPS"></a>
<a name="index-NO_005fPUSHD_005fIGNORE_005fDUPS"></a>
<a name="index-PUSHDIGNOREDUPS"></a>
<a name="index-NOPUSHDIGNOREDUPS"></a>
<a name="index-directory-stack_002c-ignoring-duplicates"></a>
</dd>
<dt> <tt>PUSHD_IGNORE_DUPS</tt></dt>
<dd><p>Don&rsquo;t push multiple copies of the same directory onto the directory stack.
</p>
<a name="index-PUSHD_005fMINUS"></a>
<a name="index-NO_005fPUSHD_005fMINUS"></a>
<a name="index-PUSHDMINUS"></a>
<a name="index-NOPUSHDMINUS"></a>
<a name="index-directory-stack_002c-controlling-syntax"></a>
</dd>
<dt> <tt>PUSHD_MINUS</tt></dt>
<dd><p>Exchanges the meanings of &lsquo;<tt>+</tt>&rsquo; and &lsquo;<tt>-</tt>&rsquo;
when used with a number to specify a directory in the stack.
</p>
<a name="index-PUSHD_005fSILENT"></a>
<a name="index-NO_005fPUSHD_005fSILENT"></a>
<a name="index-PUSHDSILENT"></a>
<a name="index-NOPUSHDSILENT"></a>
<a name="index-directory-stack_002c-silencing"></a>
</dd>
<dt> <tt>PUSHD_SILENT</tt> (<tt>-E</tt>)</dt>
<dd><p>Do not print the directory stack after <tt>pushd</tt> or <tt>popd</tt>.
</p>
<a name="index-PUSHD_005fTO_005fHOME"></a>
<a name="index-NO_005fPUSHD_005fTO_005fHOME"></a>
<a name="index-PUSHDTOHOME"></a>
<a name="index-NOPUSHDTOHOME"></a>
<a name="index-pushd_002c-to-home"></a>
</dd>
<dt> <tt>PUSHD_TO_HOME</tt> (<tt>-D</tt>)</dt>
<dd><p>Have <tt>pushd</tt> with no arguments act like &lsquo;<tt>pushd $HOME</tt>&rsquo;.
</p>
</dd>
</dl>


<hr size="6">
<a name="Completion-4"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#Changing-Directories" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#Expansion-and-Globbing" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#Options" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#Description-of-Options" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="Shell-Builtin-Commands.html#Shell-Builtin-Commands" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="zsh.html#Top" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="zsh_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="Concept-Index.html#Concept-Index" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="zsh_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h3 class="subsection">16.2.2 Completion</h3>
<dl compact="compact">
<dd><a name="index-ALWAYS_005fLAST_005fPROMPT"></a>
<a name="index-NO_005fALWAYS_005fLAST_005fPROMPT"></a>
<a name="index-ALWAYSLASTPROMPT"></a>
<a name="index-NOALWAYSLASTPROMPT"></a>
</dd>
<dt> <tt>ALWAYS_LAST_PROMPT</tt> &lt;D&gt;</dt>
<dd><p>If unset, key functions that list completions try to return to the last
prompt if given a numeric argument. If set these functions try to
return to the last prompt if given <em>no</em> numeric argument.
</p>
<a name="index-ALWAYS_005fTO_005fEND"></a>
<a name="index-NO_005fALWAYS_005fTO_005fEND"></a>
<a name="index-ALWAYSTOEND"></a>
<a name="index-NOALWAYSTOEND"></a>
</dd>
<dt> <tt>ALWAYS_TO_END</tt></dt>
<dd><p>If a completion is performed with the cursor within a word, and a
full completion is inserted, the cursor is moved to the end of the
word.  That is, the cursor is moved to the end of the word if either
a single match is inserted or menu completion is performed.
</p>
<a name="index-AUTO_005fLIST"></a>
<a name="index-NO_005fAUTO_005fLIST"></a>
<a name="index-AUTOLIST"></a>
<a name="index-NOAUTOLIST"></a>
<a name="index-completion_002c-listing-choices"></a>
</dd>
<dt> <tt>AUTO_LIST</tt> (<tt>-9</tt>) &lt;D&gt;</dt>
<dd><p>Automatically list choices on an ambiguous completion.
</p>
<a name="index-AUTO_005fMENU"></a>
<a name="index-NO_005fAUTO_005fMENU"></a>
<a name="index-AUTOMENU"></a>
<a name="index-NOAUTOMENU"></a>
<a name="index-completion_002c-menu"></a>
</dd>
<dt> <tt>AUTO_MENU</tt> &lt;D&gt;</dt>
<dd><p>Automatically use menu completion after the second consecutive request for
completion, for example by pressing the tab key repeatedly. This option
is overridden by <tt>MENU_COMPLETE</tt>.
</p>
<a name="index-AUTO_005fNAME_005fDIRS"></a>
<a name="index-NO_005fAUTO_005fNAME_005fDIRS"></a>
<a name="index-AUTONAMEDIRS"></a>
<a name="index-NOAUTONAMEDIRS"></a>
<a name="index-directories_002c-named"></a>
</dd>
<dt> <tt>AUTO_NAME_DIRS</tt></dt>
<dd><p>Any parameter that is set to the absolute name of a directory
immediately becomes a name for that directory, that will be used
by the &lsquo;<tt>%~</tt>&rsquo;
and related prompt sequences, and will be available when completion
is performed on a word starting with &lsquo;<tt>~</tt>&rsquo;.
(Otherwise, the parameter must be used in the form &lsquo;<tt>~</tt><var>param</var>&rsquo; first.)
</p>
<a name="index-AUTO_005fPARAM_005fKEYS"></a>
<a name="index-NO_005fAUTO_005fPARAM_005fKEYS"></a>
<a name="index-AUTOPARAMKEYS"></a>
<a name="index-NOAUTOPARAMKEYS"></a>
</dd>
<dt> <tt>AUTO_PARAM_KEYS</tt> &lt;D&gt;</dt>
<dd><p>If a parameter name was completed and a following character
(normally a space) automatically
inserted, and the next character typed is one
of those that have to come directly after the name (like &lsquo;<tt>}</tt>&rsquo;, &lsquo;<tt>:</tt>&rsquo;,
etc.), the automatically added character is deleted, so that the character
typed comes immediately after the parameter name.
Completion in a brace expansion is affected similarly: the added character
is a &lsquo;<tt>,</tt>&rsquo;, which will be removed if &lsquo;<tt>}</tt>&rsquo; is typed next.
</p>
<a name="index-AUTO_005fPARAM_005fSLASH"></a>
<a name="index-NO_005fAUTO_005fPARAM_005fSLASH"></a>
<a name="index-AUTOPARAMSLASH"></a>
<a name="index-NOAUTOPARAMSLASH"></a>
</dd>
<dt> <tt>AUTO_PARAM_SLASH</tt> &lt;D&gt;</dt>
<dd><p>If a parameter is completed whose content is the name of a directory,
then add a trailing slash instead of a space.
</p>
<a name="index-AUTO_005fREMOVE_005fSLASH"></a>
<a name="index-NO_005fAUTO_005fREMOVE_005fSLASH"></a>
<a name="index-AUTOREMOVESLASH"></a>
<a name="index-NOAUTOREMOVESLASH"></a>
<a name="index-slash_002c-removing-trailing"></a>
</dd>
<dt> <tt>AUTO_REMOVE_SLASH</tt> &lt;D&gt;</dt>
<dd><p>When the last character resulting from a completion is a slash and the next
character typed is a word delimiter, a slash, or a character that ends 
a command (such as a semicolon or an ampersand), remove the slash.
</p>
<a name="index-BASH_005fAUTO_005fLIST"></a>
<a name="index-NO_005fBASH_005fAUTO_005fLIST"></a>
<a name="index-BASHAUTOLIST"></a>
<a name="index-NOBASHAUTOLIST"></a>
<a name="index-completion_002c-listing-choices_002c-bash-style"></a>
</dd>
<dt> <tt>BASH_AUTO_LIST</tt></dt>
<dd><p>On an ambiguous completion, automatically list choices when the
completion function is called twice in succession.  This takes
precedence over <tt>AUTO_LIST</tt>.  The setting of <tt>LIST_AMBIGUOUS</tt> is
respected.  If <tt>AUTO_MENU</tt> is set, the menu behaviour will then start
with the third press.  Note that this will not work with
<tt>MENU_COMPLETE</tt>, since repeated completion calls immediately cycle
through the list in that case.
</p>
<a name="index-COMPLETE_005fALIASES"></a>
<a name="index-NO_005fCOMPLETE_005fALIASES"></a>
<a name="index-COMPLETEALIASES"></a>
<a name="index-NOCOMPLETEALIASES"></a>
<a name="index-aliases_002c-completion-of"></a>
</dd>
<dt> <tt>COMPLETE_ALIASES</tt></dt>
<dd><p>Prevents aliases on the command line from being internally substituted
before completion is attempted.  The effect is to make the alias a
distinct command for completion purposes.
</p>
<a name="index-COMPLETE_005fIN_005fWORD"></a>
<a name="index-NO_005fCOMPLETE_005fIN_005fWORD"></a>
<a name="index-COMPLETEINWORD"></a>
<a name="index-NOCOMPLETEINWORD"></a>
</dd>
<dt> <tt>COMPLETE_IN_WORD</tt></dt>
<dd><p>If unset, the cursor is set to the end of the word if completion is
started. Otherwise it stays there and completion is done from both ends.
</p>
<a name="index-GLOB_005fCOMPLETE"></a>
<a name="index-NO_005fGLOB_005fCOMPLETE"></a>
<a name="index-GLOBCOMPLETE"></a>
<a name="index-NOGLOBCOMPLETE"></a>
</dd>
<dt> <tt>GLOB_COMPLETE</tt></dt>
<dd><p>When the current word has a glob pattern, do not insert all the words
resulting from the expansion but generate matches as for completion and
cycle through them like <tt>MENU_COMPLETE</tt>. The matches are generated as if
a &lsquo;<tt>*</tt>&rsquo; was added to the end of the word, or inserted at the cursor when
<tt>COMPLETE_IN_WORD</tt> is set.  This actually uses pattern matching, not
globbing, so it works not only for files but for any completion, such as
options, user names, etc.
</p>
<p>Note that when the pattern matcher is used, matching control (for example,
case-insensitive or anchored matching) cannot be used.  This limitation
only applies when the current word contains a pattern; simply turning
on the <tt>GLOB_COMPLETE</tt> option does not have this effect.
</p>
<a name="index-HASH_005fLIST_005fALL"></a>
<a name="index-NO_005fHASH_005fLIST_005fALL"></a>
<a name="index-HASHLISTALL"></a>
<a name="index-NOHASHLISTALL"></a>
</dd>
<dt> <tt>HASH_LIST_ALL</tt> &lt;D&gt;</dt>
<dd><p>Whenever a command completion or spelling correction is attempted, make
sure the entire command path is hashed first.  This makes the first
completion slower but avoids false reports of spelling errors.
</p>
<a name="index-LIST_005fAMBIGUOUS"></a>
<a name="index-NO_005fLIST_005fAMBIGUOUS"></a>
<a name="index-LISTAMBIGUOUS"></a>
<a name="index-NOLISTAMBIGUOUS"></a>
<a name="index-ambiguous-completion"></a>
<a name="index-completion_002c-ambiguous"></a>
</dd>
<dt> <tt>LIST_AMBIGUOUS</tt> &lt;D&gt;</dt>
<dd><p>This option works when <tt>AUTO_LIST</tt> or <tt>BASH_AUTO_LIST</tt> is also
set.  If there is an unambiguous prefix to insert on the command line,
that is done without a completion list being displayed; in other
words, auto-listing behaviour only takes place when nothing would be
inserted.  In the case of <tt>BASH_AUTO_LIST</tt>, this means that the list
will be delayed to the third call of the function.
</p>
<a name="index-LIST_005fBEEP"></a>
<a name="index-NO_005fLIST_005fBEEP"></a>
<a name="index-LISTBEEP"></a>
<a name="index-NOLISTBEEP"></a>
<a name="index-beep_002c-ambiguous-completion"></a>
<a name="index-completion_002c-beep-on-ambiguous"></a>
</dd>
<dt> <tt>LIST_BEEP</tt> &lt;D&gt;</dt>
<dd><p>Beep on an ambiguous completion.  More accurately, this forces the
completion widgets to return status 1 on an ambiguous completion, which
causes the shell to beep if the option <tt>BEEP</tt> is also set; this may
be modified if completion is called from a user-defined widget.
</p>
<a name="index-LIST_005fPACKED"></a>
<a name="index-NO_005fLIST_005fPACKED"></a>
<a name="index-LISTPACKED"></a>
<a name="index-NOLISTPACKED"></a>
<a name="index-completion_002c-listing"></a>
</dd>
<dt> <tt>LIST_PACKED</tt></dt>
<dd><p>Try to make the completion list smaller (occupying less lines) by
printing the matches in columns with different widths.
</p>
<a name="index-LIST_005fROWS_005fFIRST"></a>
<a name="index-NO_005fLIST_005fROWS_005fFIRST"></a>
<a name="index-LISTROWSFIRST"></a>
<a name="index-NOLISTROWSFIRST"></a>
<a name="index-completion_002c-listing-order"></a>
</dd>
<dt> <tt>LIST_ROWS_FIRST</tt></dt>
<dd><p>Lay out the matches in completion lists sorted horizontally, that is,
the second match is to the right of the first one, not under it as
usual.
</p>
<a name="index-LIST_005fTYPES"></a>
<a name="index-NO_005fLIST_005fTYPES"></a>
<a name="index-LISTTYPES"></a>
<a name="index-NOLISTTYPES"></a>
<a name="index-marking-file-types"></a>
<a name="index-files_002c-marking-type-of"></a>
</dd>
<dt> <tt>LIST_TYPES</tt> (<tt>-X</tt>) &lt;D&gt;</dt>
<dd><p>When listing files that are possible completions, show the
type of each file with a trailing identifying mark.
</p>
<a name="index-MENU_005fCOMPLETE"></a>
<a name="index-NO_005fMENU_005fCOMPLETE"></a>
<a name="index-MENUCOMPLETE"></a>
<a name="index-NOMENUCOMPLETE"></a>
<a name="index-completion_002c-menu-1"></a>
</dd>
<dt> <tt>MENU_COMPLETE</tt> (<tt>-Y</tt>)</dt>
<dd><p>On an ambiguous completion, instead of listing possibilities or beeping,
insert the first match immediately.  Then when completion is requested
again, remove the first match and insert the second match, etc.
When there are no more matches, go back to the first one again.
<tt>reverse-menu-complete</tt> may be used to loop through the list
in the other direction. This option overrides <tt>AUTO_MENU</tt>.
</p>
<a name="index-REC_005fEXACT"></a>
<a name="index-NO_005fREC_005fEXACT"></a>
<a name="index-RECEXACT"></a>
<a name="index-NORECEXACT"></a>
<a name="index-completion_002c-exact-matches"></a>
</dd>
<dt> <tt>REC_EXACT</tt> (<tt>-S</tt>)</dt>
<dd><p>In completion, recognize exact matches even
if they are ambiguous.
</p>
</dd>
</dl>


<hr size="6">
<a name="Expansion-and-Globbing"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#Completion-4" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#History" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#Options" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#Description-of-Options" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="Shell-Builtin-Commands.html#Shell-Builtin-Commands" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="zsh.html#Top" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="zsh_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="Concept-Index.html#Concept-Index" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="zsh_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h3 class="subsection">16.2.3 Expansion and Globbing</h3>
<dl compact="compact">
<dd><a name="index-BAD_005fPATTERN"></a>
<a name="index-NO_005fBAD_005fPATTERN"></a>
<a name="index-BADPATTERN"></a>
<a name="index-NOBADPATTERN"></a>
<a name="index-globbing_002c-bad-pattern"></a>
<a name="index-filename-generation_002c-bad-pattern"></a>
</dd>
<dt> <tt>BAD_PATTERN</tt> (<tt>+2</tt>) &lt;C&gt; &lt;Z&gt;</dt>
<dd><p>If a pattern for filename generation is badly formed, print an error message.
(If this option is unset, the pattern will be left unchanged.)
</p>
<a name="index-BARE_005fGLOB_005fQUAL"></a>
<a name="index-NO_005fBARE_005fGLOB_005fQUAL"></a>
<a name="index-BAREGLOBQUAL"></a>
<a name="index-NOBAREGLOBQUAL"></a>
<a name="index-globbing-qualifiers_002c-enable"></a>
<a name="index-enable-globbing-qualifiers"></a>
</dd>
<dt> <tt>BARE_GLOB_QUAL</tt> &lt;Z&gt;</dt>
<dd><p>In a glob pattern, treat a trailing set of parentheses as a qualifier
list, if it contains no &lsquo;<tt>|</tt>&rsquo;, &lsquo;<tt>(</tt>&rsquo; or (if special) &lsquo;<tt>~</tt>&rsquo;
characters.  See <a href="Expansion.html#Filename-Generation">Filename Generation</a>.
</p>
<a name="index-BRACE_005fCCL"></a>
<a name="index-NO_005fBRACE_005fCCL"></a>
<a name="index-BRACECCL"></a>
<a name="index-NOBRACECCL"></a>
<a name="index-brace-expansion_002c-extending"></a>
<a name="index-expansion_002c-brace_002c-extending"></a>
</dd>
<dt> <tt>BRACE_CCL</tt></dt>
<dd><p>Expand expressions in braces which would not otherwise undergo brace
expansion to a lexically ordered list of all the characters.  See
<a href="Expansion.html#Brace-Expansion">Brace Expansion</a>.
</p>
<a name="index-CASE_005fGLOB"></a>
<a name="index-NO_005fCASE_005fGLOB"></a>
<a name="index-CASEGLOB"></a>
<a name="index-NOCASEGLOB"></a>
<a name="index-case_002dinsensitive-globbing_002c-option"></a>
</dd>
<dt> <tt>CASE_GLOB</tt> &lt;D&gt;</dt>
<dd><p>Make globbing (filename generation) sensitive to case.  Note that other
uses of patterns are always sensitive to case.  If the option is unset,
the presence of any character which is special to filename generation
will cause case-insensitive matching.  For example, <tt>cvs(/)</tt>
can match the directory <tt>CVS</tt> owing to the presence of the globbing flag
(unless the option <tt>BARE_GLOB_QUAL</tt> is unset).
</p>
<a name="index-CASE_005fMATCH"></a>
<a name="index-NO_005fCASE_005fMATCH"></a>
<a name="index-CASEMATCH"></a>
<a name="index-NOCASEMATCH"></a>
<a name="index-case_002dinsensitive-regular-expression-matches_002c-option"></a>
<a name="index-regular-expressions_002c-case_002dinsensitive-matching_002c-option"></a>
</dd>
<dt> <tt>CASE_MATCH</tt> &lt;D&gt;</dt>
<dd><p>Make regular expressions using the <tt>zsh/regex</tt> module (including
matches with <tt>=~</tt>) sensitive to case.
</p>
<a name="index-CSH_005fNULL_005fGLOB"></a>
<a name="index-NO_005fCSH_005fNULL_005fGLOB"></a>
<a name="index-CSHNULLGLOB"></a>
<a name="index-NOCSHNULLGLOB"></a>
<a name="index-csh_002c-null-globbing-style"></a>
<a name="index-null-globbing-style_002c-csh"></a>
<a name="index-globbing_002c-null_002c-style_002c-csh"></a>
</dd>
<dt> <tt>CSH_NULL_GLOB</tt> &lt;C&gt;</dt>
<dd><p>If a pattern for filename generation has no matches,
delete the pattern from the argument list;
do not report an error unless all the patterns
in a command have no matches.
Overrides <tt>NOMATCH</tt>.
</p>
<a name="index-EQUALS"></a>
<a name="index-NO_005fEQUALS"></a>
<a name="index-NOEQUALS"></a>
<a name="index-filename-expansion_002c-_003d"></a>
</dd>
<dt> <tt>EQUALS</tt> &lt;Z&gt;</dt>
<dd><p>Perform <tt>=</tt> filename expansion.
(See <a href="Expansion.html#Filename-Expansion">Filename Expansion</a>.)
</p>
<a name="index-EXTENDED_005fGLOB"></a>
<a name="index-NO_005fEXTENDED_005fGLOB"></a>
<a name="index-EXTENDEDGLOB"></a>
<a name="index-NOEXTENDEDGLOB"></a>
<a name="index-globbing_002c-extended"></a>
</dd>
<dt> <tt>EXTENDED_GLOB</tt></dt>
<dd><p>Treat the &lsquo;<tt>#</tt>&rsquo;, &lsquo;<tt>~</tt>&rsquo; and &lsquo;<tt>^</tt>&rsquo; characters as part of patterns
for filename generation, etc.  (An initial unquoted &lsquo;<tt>~</tt>&rsquo;
always produces named directory expansion.)
</p>
<a name="index-GLOB"></a>
<a name="index-NO_005fGLOB"></a>
<a name="index-NOGLOB"></a>
<a name="index-globbing_002c-enabling"></a>
<a name="index-enabling-globbing"></a>
</dd>
<dt> <tt>GLOB</tt> (<tt>+F</tt>, ksh: <tt>+f</tt>) &lt;D&gt;</dt>
<dd><p>Perform filename generation (globbing).
(See <a href="Expansion.html#Filename-Generation">Filename Generation</a>.)
</p>
<a name="index-GLOB_005fASSIGN"></a>
<a name="index-NO_005fGLOB_005fASSIGN"></a>
<a name="index-GLOBASSIGN"></a>
<a name="index-NOGLOBASSIGN"></a>
</dd>
<dt> <tt>GLOB_ASSIGN</tt> &lt;C&gt;</dt>
<dd><p>If this option is set, filename generation (globbing) is
performed on the right hand side of scalar parameter assignments of
the form &lsquo;<var>name</var><tt>=</tt><var>pattern</var> (e.g. &lsquo;<tt>foo=*</tt>&rsquo;).
If the result has more than one word the parameter will become an array
with those words as arguments. This option is provided for backwards
compatibility only: globbing is always performed on the right hand side
of array assignments of the form &lsquo;<var>name</var><tt>=(</tt><var>value</var><tt>)</tt>&rsquo;
(e.g. &lsquo;<tt>foo=(*)</tt>&rsquo;) and this form is recommended for clarity;
with this option set, it is not possible to predict whether the result
will be an array or a scalar.
</p>
<a name="index-GLOB_005fDOTS"></a>
<a name="index-NO_005fGLOB_005fDOTS"></a>
<a name="index-GLOBDOTS"></a>
<a name="index-NOGLOBDOTS"></a>
<a name="index-globbing_002c-of-_002e-files"></a>
</dd>
<dt> <tt>GLOB_DOTS</tt> (<tt>-4</tt>)</dt>
<dd><p>Do not require a leading &lsquo;<tt>.</tt>&rsquo; in a filename to be matched explicitly.
</p>
<a name="index-GLOB_005fSUBST"></a>
<a name="index-NO_005fGLOB_005fSUBST"></a>
<a name="index-GLOBSUBST"></a>
<a name="index-NOGLOBSUBST"></a>
</dd>
<dt> <tt>GLOB_SUBST</tt> &lt;C&gt; &lt;K&gt; &lt;S&gt;</dt>
<dd><p>Treat any characters resulting from parameter expansion as being
eligible for file expansion and filename generation, and any
characters resulting from command substitution as being eligible for
filename generation.  Braces (and commas in between) do not become eligible
for expansion.
</p>
<a name="index-HIST_005fSUBST_005fPATTERN"></a>
<a name="index-NO_005fHIST_005fSUBST_005fPATTERN"></a>
<a name="index-HISTSUBSTPATTERN"></a>
<a name="index-NOHISTSUBSTPATTERN"></a>
</dd>
<dt> <tt>HIST_SUBST_PATTERN</tt></dt>
<dd><p>Substitutions using the <tt>:s</tt> and <tt>:&amp;</tt> history modifiers are performed
with pattern matching instead of string matching.  This occurs wherever
history modifiers are valid, including glob qualifiers and parameters.
See
<a href="Expansion.html#Modifiers">Modifiers</a>.
</p>
<a name="index-IGNORE_005fBRACES"></a>
<a name="index-NO_005fIGNORE_005fBRACES"></a>
<a name="index-IGNOREBRACES"></a>
<a name="index-NOIGNOREBRACES"></a>
<a name="index-disabling-brace-expansion"></a>
<a name="index-brace-expansion_002c-disabling"></a>
<a name="index-expansion_002c-brace_002c-disabling"></a>
</dd>
<dt> <tt>IGNORE_BRACES</tt> (<tt>-I</tt>) &lt;S&gt;</dt>
<dd><p>Do not perform brace expansion.  For historical reasons this
also includes the effect of the <tt>IGNORE_CLOSE_BRACES</tt> option.
</p>
<a name="index-IGNORE_005fCLOSE_005fBRACES"></a>
<a name="index-NO_005fIGNORE_005fCLOSE_005fBRACES"></a>
<a name="index-IGNORECLOSEBRACES"></a>
<a name="index-NOIGNORECLOSEBRACES"></a>
</dd>
<dt> <tt>IGNORE_CLOSE_BRACES</tt></dt>
<dd><p>When neither this option nor <tt>IGNORE_BRACES</tt> is set, a sole
close brace character &lsquo;<tt>}</tt>&rsquo; is syntactically significant at any
point on a command line.  This has the effect that no semicolon
or newline is necessary before the brace terminating a function
or current shell construct.  When either option is set, a closing brace
is syntactically significant only in command position.  Unlike
<tt>IGNORE_BRACES</tt>, this option does not disable brace expansion.
</p>
<p>For example, with both options unset a function may be defined
in the following fashion:
</p>
<table><tr><td>&nbsp;</td><td><pre class="example">args() { echo $# }
</pre></td></tr></table>

<p>while if either option is set, this does not work and something
equivalent to the following is required:
</p>
<table><tr><td>&nbsp;</td><td><pre class="example">args() { echo $#; }
</pre></td></tr></table>


<a name="index-KSH_005fGLOB"></a>
<a name="index-NO_005fKSH_005fGLOB"></a>
<a name="index-KSHGLOB"></a>
<a name="index-NOKSHGLOB"></a>
</dd>
<dt> <tt>KSH_GLOB</tt> &lt;K&gt;</dt>
<dd><p>In pattern matching, the interpretation of parentheses is affected by
a preceding &lsquo;<tt>@</tt>&rsquo;, &lsquo;<tt>*</tt>&rsquo;, &lsquo;<tt>+</tt>&rsquo;, &lsquo;<tt>?</tt>&rsquo; or &lsquo;<tt>!</tt>&rsquo;.
See <a href="Expansion.html#Filename-Generation">Filename Generation</a>.
</p>
<a name="index-MAGIC_005fEQUAL_005fSUBST"></a>
<a name="index-NO_005fMAGIC_005fEQUAL_005fSUBST"></a>
<a name="index-MAGICEQUALSUBST"></a>
<a name="index-NOMAGICEQUALSUBST"></a>
</dd>
<dt> <tt>MAGIC_EQUAL_SUBST</tt></dt>
<dd><p>All unquoted arguments of the form &lsquo;<var>anything</var><tt>=</tt><var>expression</var>&rsquo;
appearing after the command name have filename expansion (that is,
where <var>expression</var> has a leading &lsquo;<tt>~</tt>&rsquo; or &lsquo;<tt>=</tt>&rsquo;) performed on
<var>expression</var> as if it were a parameter assignment.  The argument is
not otherwise treated specially; it is passed to the command as a single
argument, and not used as an actual parameter assignment.  For example, in
<tt>echo foo=~/bar:~/rod</tt>, both occurrences of <tt>~</tt> would be replaced.
Note that this happens anyway with <tt>typeset</tt> and similar statements.
</p>
<p>This option respects the setting of the <tt>KSH_TYPESET</tt> option.  In other
words, if both options are in effect, arguments looking like
assignments will not undergo word splitting.
</p>
<a name="index-MARK_005fDIRS"></a>
<a name="index-NO_005fMARK_005fDIRS"></a>
<a name="index-MARKDIRS"></a>
<a name="index-NOMARKDIRS"></a>
<a name="index-directories_002c-marking"></a>
<a name="index-marking-directories"></a>
</dd>
<dt> <tt>MARK_DIRS</tt> (<tt>-8</tt>, ksh: <tt>-X</tt>)</dt>
<dd><p>Append a trailing &lsquo;<tt>/</tt>&rsquo; to all directory
names resulting from filename generation (globbing).
</p>
<a name="index-MULTIBYTE"></a>
<a name="index-NO_005fMULTIBYTE"></a>
<a name="index-NOMULTIBYTE"></a>
<a name="index-characters_002c-multibyte_002c-in-expansion-and-globbing"></a>
<a name="index-multibyte-characters_002c-in-expansion-and-globbing"></a>
</dd>
<dt> <tt>MULTIBYTE</tt> &lt;C&gt; &lt;K&gt; &lt;Z&gt;</dt>
<dd><p>Respect multibyte characters when found in strings.
When this option is set, strings are examined using the
system library to determine how many bytes form a character, depending
on the current locale.  This affects the way characters are counted in
pattern matching, parameter values and various delimiters.
</p>
<p>The option is on by default if the shell was compiled with
<tt>MULTIBYTE_SUPPORT</tt> except in <tt>sh</tt> emulation; otherwise it is off by
default and has no effect if turned on.  The mode is off in <tt>sh</tt>
emulation for compatibility but for interactive use may need to be
turned on if the terminal interprets multibyte characters.
</p>
<p>If the option is off a single byte is always treated as a single
character.  This setting is designed purely for examining strings
known to contain raw bytes or other values that may not be characters
in the current locale.  It is not necessary to unset the option merely
because the character set for the current locale does not contain multibyte
characters.
</p>
<p>The option does not affect the shell&rsquo;s editor,  which always uses the
locale to determine multibyte characters.  This is because
the character set displayed by the terminal emulator is independent of
shell settings.
</p>
<a name="index-NOMATCH"></a>
<a name="index-NO_005fNOMATCH"></a>
<a name="index-NONOMATCH"></a>
<a name="index-globbing_002c-no-matches"></a>
</dd>
<dt> <tt>NOMATCH</tt> (<tt>+3</tt>) &lt;C&gt; &lt;Z&gt;</dt>
<dd><p>If a pattern for filename generation has no matches,
print an error, instead of
leaving it unchanged in the argument list.
This also applies to file expansion
of an initial &lsquo;<tt>~</tt>&rsquo; or &lsquo;<tt>=</tt>&rsquo;.
</p>
<a name="index-NULL_005fGLOB"></a>
<a name="index-NO_005fNULL_005fGLOB"></a>
<a name="index-NULLGLOB"></a>
<a name="index-NONULLGLOB"></a>
<a name="index-globbing_002c-no-matches-1"></a>
</dd>
<dt> <tt>NULL_GLOB</tt> (<tt>-G</tt>)</dt>
<dd><p>If a pattern for filename generation has no matches,
delete the pattern from the argument list instead
of reporting an error.  Overrides <tt>NOMATCH</tt>.
</p>
<a name="index-NUMERIC_005fGLOB_005fSORT"></a>
<a name="index-NO_005fNUMERIC_005fGLOB_005fSORT"></a>
<a name="index-NUMERICGLOBSORT"></a>
<a name="index-NONUMERICGLOBSORT"></a>
<a name="index-globbing_002c-sorting-numerically"></a>
</dd>
<dt> <tt>NUMERIC_GLOB_SORT</tt></dt>
<dd><p>If numeric filenames are matched by a filename generation pattern,
sort the filenames numerically rather than lexicographically.
</p>
<a name="index-RC_005fEXPAND_005fPARAM"></a>
<a name="index-NO_005fRC_005fEXPAND_005fPARAM"></a>
<a name="index-RCEXPANDPARAM"></a>
<a name="index-NORCEXPANDPARAM"></a>
<a name="index-rc_002c-parameter-expansion-style"></a>
<a name="index-parameter-expansion-style_002c-rc"></a>
</dd>
<dt> <tt>RC_EXPAND_PARAM</tt> (<tt>-P</tt>)</dt>
<dd><p>Array expansions of the form
&lsquo;<var>foo</var><tt>${</tt><var>xx</var><tt>}</tt><var>bar</var>&rsquo;, where the parameter
<var>xx</var> is set to <tt>(</tt><var>a b c</var><tt>)</tt>, are substituted with
&lsquo;<var>fooabar foobbar foocbar</var>&rsquo; instead of the default
&lsquo;<var>fooa b cbar</var>&rsquo;.  Note that an empty array will therefore cause
all arguments to be removed.
</p>
<a name="index-REMATCH_005fPCRE"></a>
<a name="index-NO_005fREMATCH_005fPCRE"></a>
<a name="index-REMATCHPCRE"></a>
<a name="index-NOREMATCHPCRE"></a>
<a name="index-regexp_002c-PCRE"></a>
<a name="index-PCRE_002c-regexp"></a>
</dd>
<dt> <tt>REMATCH_PCRE</tt> &lt;Z&gt;</dt>
<dd><p>If set, regular expression matching with the <tt>=~</tt> operator will use
Perl-Compatible Regular Expressions from the PCRE library, if available.
If not set, regular expressions will use the extended regexp syntax
provided by the system libraries.
</p>
<a name="index-SH_005fGLOB"></a>
<a name="index-NO_005fSH_005fGLOB"></a>
<a name="index-SHGLOB"></a>
<a name="index-NOSHGLOB"></a>
<a name="index-sh_002c-globbing-style"></a>
<a name="index-globbing-style_002c-sh"></a>
</dd>
<dt> <tt>SH_GLOB</tt> &lt;K&gt; &lt;S&gt;</dt>
<dd><p>Disables the special meaning of &lsquo;<tt>(</tt>&rsquo;, &lsquo;<tt>|</tt>&rsquo;, &lsquo;<tt>)</tt>&rsquo;
and &rsquo;<tt>&lt;</tt>&rsquo; for globbing the result of parameter and command substitutions,
and in some other places where
the shell accepts patterns.  If <tt>SH_GLOB</tt> is set but <tt>KSH_GLOB</tt> is
not, the shell allows the interpretation of
subshell expressions enclosed in parentheses in some cases where there
is no space before the opening parenthesis, e.g. <tt>!(true)</tt>
is interpreted as if there were a space after the <tt>!</tt>.  This option is
set by default if zsh is invoked as <tt>sh</tt> or <tt>ksh</tt>.
</p>
<a name="index-UNSET"></a>
<a name="index-NO_005fUNSET"></a>
<a name="index-NOUNSET"></a>
<a name="index-parameters_002c-substituting-unset"></a>
<a name="index-unset-parameters_002c-substituting"></a>
</dd>
<dt> <tt>UNSET</tt> (<tt>+u</tt>, ksh: <tt>+u</tt>) &lt;K&gt; &lt;S&gt; &lt;Z&gt;</dt>
<dd><p>Treat unset parameters as if they were empty when substituting.
Otherwise they are treated as an error.
</p>
<a name="index-WARN_005fCREATE_005fGLOBAL"></a>
<a name="index-NO_005fWARN_005fCREATE_005fGLOBAL"></a>
<a name="index-WARNCREATEGLOBAL"></a>
<a name="index-NOWARNCREATEGLOBAL"></a>
<a name="index-parameters_002c-warning-when-created-globally"></a>
</dd>
<dt> <tt>WARN_CREATE_GLOBAL</tt></dt>
<dd><p>Print a warning message when a global parameter is created in a function
by an assignment.  This often indicates that a parameter has not been
declared local when it should have been.  Parameters explicitly declared
global from within a function using <tt>typeset -g</tt> do not cause a warning.
Note that there is no warning when a local parameter is assigned to in
a nested function, which may also indicate an error.
</p>
</dd>
</dl>


<hr size="6">
<a name="History"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#Expansion-and-Globbing" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#Initialisation" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#Options" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#Description-of-Options" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="Shell-Builtin-Commands.html#Shell-Builtin-Commands" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="zsh.html#Top" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="zsh_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="Concept-Index.html#Concept-Index" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="zsh_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h3 class="subsection">16.2.4 History</h3>
<dl compact="compact">
<dd><a name="index-APPEND_005fHISTORY"></a>
<a name="index-NO_005fAPPEND_005fHISTORY"></a>
<a name="index-APPENDHISTORY"></a>
<a name="index-NOAPPENDHISTORY"></a>
<a name="index-history_002c-appending-to-a-file"></a>
</dd>
<dt> <tt>APPEND_HISTORY</tt> &lt;D&gt;</dt>
<dd><p>If this is set, zsh sessions will append their history list to
the history file, rather than replace it. Thus, multiple parallel
zsh sessions will all have the new entries from their history lists
added to the history file, in the order that they exit.
The file will still be periodically re-written to trim it when the
number of lines grows 20% beyond the value specified by
<tt>$SAVEHIST</tt> (see also the HIST_SAVE_BY_COPY option).
</p>
<a name="index-BANG_005fHIST"></a>
<a name="index-NO_005fBANG_005fHIST"></a>
<a name="index-BANGHIST"></a>
<a name="index-NOBANGHIST"></a>
<a name="index-history_002c-enable-substitution"></a>
<a name="index-enable-history-substitution"></a>
</dd>
<dt> <tt>BANG_HIST</tt> (<tt>+K</tt>) &lt;C&gt; &lt;Z&gt;</dt>
<dd><p>Perform textual history expansion, <cite>csh</cite>-style,
treating the character &lsquo;<tt>!</tt>&rsquo; specially.
</p>
<a name="index-EXTENDED_005fHISTORY"></a>
<a name="index-NO_005fEXTENDED_005fHISTORY"></a>
<a name="index-EXTENDEDHISTORY"></a>
<a name="index-NOEXTENDEDHISTORY"></a>
<a name="index-history_002c-timestamping"></a>
</dd>
<dt> <tt>EXTENDED_HISTORY</tt> &lt;C&gt;</dt>
<dd><p>Save each command&rsquo;s beginning timestamp (in seconds since the epoch)
and the duration (in seconds) to the history file.  The format of
this prefixed data is:
</p>
<p>&lsquo;<tt>:</tt> <var>&lt;beginning time&gt;</var><tt>:</tt><var>&lt;elapsed seconds&gt;</var><tt>;</tt><var>&lt;command&gt;</var>&rsquo;.
</p>
<a name="index-HIST_005fALLOW_005fCLOBBER"></a>
<a name="index-NO_005fHIST_005fALLOW_005fCLOBBER"></a>
<a name="index-HISTALLOWCLOBBER"></a>
<a name="index-NOHISTALLOWCLOBBER"></a>
</dd>
<dt> <tt>HIST_ALLOW_CLOBBER</tt></dt>
<dd><p>Add &lsquo;<tt>|</tt>&rsquo; to output redirections in the history.  This allows history
references to clobber files even when <tt>CLOBBER</tt> is unset.
</p>
<a name="index-HIST_005fBEEP"></a>
<a name="index-NO_005fHIST_005fBEEP"></a>
<a name="index-HISTBEEP"></a>
<a name="index-NOHISTBEEP"></a>
<a name="index-history-beeping"></a>
<a name="index-beep_002c-history"></a>
</dd>
<dt> <tt>HIST_BEEP</tt> &lt;D&gt;</dt>
<dd><p>Beep when an attempt is made to access a history entry which
isn&rsquo;t there.
</p>
<a name="index-HIST_005fEXPIRE_005fDUPS_005fFIRST"></a>
<a name="index-NO_005fHIST_005fEXPIRE_005fDUPS_005fFIRST"></a>
<a name="index-HISTEXPIREDUPSFIRST"></a>
<a name="index-NOHISTEXPIREDUPSFIRST"></a>
<a name="index-history_002c-expiring-duplicates"></a>
</dd>
<dt> <tt>HIST_EXPIRE_DUPS_FIRST</tt></dt>
<dd><p>If the internal history needs to be trimmed to add the current command line,
setting this option will cause the oldest history event that has a duplicate
to be lost before losing a unique event from the list.
You should be sure to set the value of <tt>HISTSIZE</tt> to a larger number
than <tt>SAVEHIST</tt> in order to give you some room for the duplicated
events, otherwise this option will behave just like
<tt>HIST_IGNORE_ALL_DUPS</tt> once the history fills up with unique events.
</p>
<a name="index-HIST_005fFCNTL_005fLOCK"></a>
<a name="index-NO_005fHIST_005fFCNTL_005fLOCK"></a>
<a name="index-HISTFCNTLLOCK"></a>
<a name="index-NOHISTFCNTLLOCK"></a>
</dd>
<dt> <tt>HIST_FCNTL_LOCK</tt></dt>
<dd><p>When writing out the history file, by default zsh uses ad-hoc file locking
to avoid known problems with locking on some operating systems.  With this
option locking is done by means of the system&rsquo;s <tt>fcntl</tt> call, where
this method is available.  On recent operating systems this may
provide better performance, in particular avoiding history corruption when
files are stored on NFS.
</p>
<a name="index-HIST_005fFIND_005fNO_005fDUPS"></a>
<a name="index-NO_005fHIST_005fFIND_005fNO_005fDUPS"></a>
<a name="index-HISTFINDNODUPS"></a>
<a name="index-NOHISTFINDNODUPS"></a>
<a name="index-history_002c-ignoring-duplicates-in-search"></a>
</dd>
<dt> <tt>HIST_FIND_NO_DUPS</tt></dt>
<dd><p>When searching for history entries in the line editor, do not display
duplicates of a line previously found, even if the duplicates are not
contiguous.
</p>
<a name="index-HIST_005fIGNORE_005fALL_005fDUPS"></a>
<a name="index-NO_005fHIST_005fIGNORE_005fALL_005fDUPS"></a>
<a name="index-HISTIGNOREALLDUPS"></a>
<a name="index-NOHISTIGNOREALLDUPS"></a>
<a name="index-history_002c-ignoring-all-duplicates"></a>
</dd>
<dt> <tt>HIST_IGNORE_ALL_DUPS</tt></dt>
<dd><p>If a new command line being added to the history list duplicates an
older one, the older command is removed from the list (even if it is
not the previous event).
</p>
<a name="index-HIST_005fIGNORE_005fDUPS"></a>
<a name="index-NO_005fHIST_005fIGNORE_005fDUPS"></a>
<a name="index-HISTIGNOREDUPS"></a>
<a name="index-NOHISTIGNOREDUPS"></a>
<a name="index-history_002c-ignoring-duplicates"></a>
</dd>
<dt> <tt>HIST_IGNORE_DUPS</tt> (<tt>-h</tt>)</dt>
<dd><p>Do not enter command lines into the history list
if they are duplicates of the previous event.
</p>
<a name="index-HIST_005fIGNORE_005fSPACE"></a>
<a name="index-NO_005fHIST_005fIGNORE_005fSPACE"></a>
<a name="index-HISTIGNORESPACE"></a>
<a name="index-NOHISTIGNORESPACE"></a>
<a name="index-history_002c-ignoring-spaces"></a>
</dd>
<dt> <tt>HIST_IGNORE_SPACE</tt> (<tt>-g</tt>)</dt>
<dd><p>Remove command lines from the history list when the first character on
the line is a space, or when one of the expanded aliases contains a
leading space.  Only normal aliases (not global or suffix aliases)
have this behaviour.
Note that the command lingers in the internal history until the next
command is entered before it vanishes, allowing you to briefly reuse
or edit the line.  If you want to make it vanish right away without
entering another command, type a space and press return.
</p>
<a name="index-HIST_005fLEX_005fWORDS"></a>
<a name="index-NO_005fHIST_005fLEX_005fWORDS"></a>
<a name="index-HISTLEXWORDS"></a>
<a name="index-NOHISTLEXWORDS"></a>
</dd>
<dt> <tt>HIST_LEX_WORDS</tt></dt>
<dd><p>By default, shell history that is read in from files is split into
words on all white space.  This means that arguments with quoted
whitespace are not correctly handled, with the consequence that
references to words in history lines that have been read from a file
may be inaccurate.  When this option is set, words read in from a
history file are divided up in a similar fashion to normal shell
command line handling.  Although this produces more accurately delimited
words, if the size of the history file is large this can be slow.  Trial
and error is necessary to decide.
</p>
<a name="index-HIST_005fNO_005fFUNCTIONS"></a>
<a name="index-NO_005fHIST_005fNO_005fFUNCTIONS"></a>
<a name="index-HISTNOFUNCTIONS"></a>
<a name="index-NOHISTNOFUNCTIONS"></a>
</dd>
<dt> <tt>HIST_NO_FUNCTIONS</tt></dt>
<dd><p>Remove function definitions from the history list.
Note that the function lingers in the internal history until the next
command is entered before it vanishes, allowing you to briefly reuse
or edit the definition.
</p>
<a name="index-HIST_005fNO_005fSTORE"></a>
<a name="index-NO_005fHIST_005fNO_005fSTORE"></a>
<a name="index-HISTNOSTORE"></a>
<a name="index-NOHISTNOSTORE"></a>
</dd>
<dt> <tt>HIST_NO_STORE</tt></dt>
<dd><p>Remove the <tt>history</tt> (<tt>fc -l</tt>) command from the history list
when invoked.
Note that the command lingers in the internal history until the next
command is entered before it vanishes, allowing you to briefly reuse
or edit the line.
</p>
<a name="index-HIST_005fREDUCE_005fBLANKS"></a>
<a name="index-NO_005fHIST_005fREDUCE_005fBLANKS"></a>
<a name="index-HISTREDUCEBLANKS"></a>
<a name="index-NOHISTREDUCEBLANKS"></a>
</dd>
<dt> <tt>HIST_REDUCE_BLANKS</tt></dt>
<dd><p>Remove superfluous blanks from each command line
being added to the history list.
</p>
<a name="index-HIST_005fSAVE_005fBY_005fCOPY"></a>
<a name="index-NO_005fHIST_005fSAVE_005fBY_005fCOPY"></a>
<a name="index-HISTSAVEBYCOPY"></a>
<a name="index-NOHISTSAVEBYCOPY"></a>
</dd>
<dt> <tt>HIST_SAVE_BY_COPY</tt> &lt;D&gt;</dt>
<dd><p>When the history file is re-written, we normally write out a copy of
the file named $HISTFILE.new and then rename it over the old one.
However, if this option is unset, we instead truncate the old
history file and write out the new version in-place.  If one of the
history-appending options is enabled, this option only has an effect
when the enlarged history file needs to be re-written to trim it
down to size.  Disable this only if you have special needs, as doing
so makes it possible to lose history entries if zsh gets interrupted
during the save.
</p>
<p>When writing out a copy of the history file, zsh preserves the old
file&rsquo;s permissions and group information, but will refuse to write
out a new file if it would change the history file&rsquo;s owner.
</p>
<a name="index-HIST_005fSAVE_005fNO_005fDUPS"></a>
<a name="index-NO_005fHIST_005fSAVE_005fNO_005fDUPS"></a>
<a name="index-HISTSAVENODUPS"></a>
<a name="index-NOHISTSAVENODUPS"></a>
</dd>
<dt> <tt>HIST_SAVE_NO_DUPS</tt></dt>
<dd><p>When writing out the history file, older commands that duplicate
newer ones are omitted.
</p>
<a name="index-HIST_005fVERIFY"></a>
<a name="index-NO_005fHIST_005fVERIFY"></a>
<a name="index-HISTVERIFY"></a>
<a name="index-NOHISTVERIFY"></a>
<a name="index-history_002c-verifying-substitution"></a>
</dd>
<dt> <tt>HIST_VERIFY</tt></dt>
<dd><p>Whenever the user enters a line with history expansion,
don&rsquo;t execute the line directly; instead, perform
history expansion and reload the line into the editing buffer.
</p>
<a name="index-INC_005fAPPEND_005fHISTORY"></a>
<a name="index-NO_005fINC_005fAPPEND_005fHISTORY"></a>
<a name="index-INCAPPENDHISTORY"></a>
<a name="index-NOINCAPPENDHISTORY"></a>
<a name="index-history_002c-incremental-appending-to-a-file"></a>
</dd>
<dt> <tt>INC_APPEND_HISTORY</tt></dt>
<dd><p>This options works like <tt>APPEND_HISTORY</tt> except that new history lines
are added to the <tt>$HISTFILE</tt> incrementally (as soon as they are
entered), rather than waiting until the shell exits.
The file will still be periodically re-written to trim it when the
number of lines grows 20% beyond the value specified by
<tt>$SAVEHIST</tt> (see also the HIST_SAVE_BY_COPY option).
</p>
<a name="index-SHARE_005fHISTORY"></a>
<a name="index-NO_005fSHARE_005fHISTORY"></a>
<a name="index-SHAREHISTORY"></a>
<a name="index-NOSHAREHISTORY"></a>
<a name="index-share-history"></a>
<a name="index-history_002c-sharing"></a>
</dd>
<dt> <tt>SHARE_HISTORY</tt> &lt;K&gt;</dt>
<dd>
<p>This option both imports new commands from the history file, and also
causes your typed commands to be appended to the history file (the
latter is like specifying <tt>INC_APPEND_HISTORY</tt>).
The history lines are also output with timestamps ala
<tt>EXTENDED_HISTORY</tt> (which makes it easier to find the spot where
we left off reading the file after it gets re-written).
</p>
<p>By default, history movement commands visit the imported lines as
well as the local lines, but you can toggle this on and off with the
set-local-history zle binding.  It is also possible to create a zle
widget that will make some commands ignore imported commands, and
some include them.
</p>
<p>If you find that you want more control over when commands
get imported, you may wish to turn <tt>SHARE_HISTORY</tt> off,
<tt>INC_APPEND_HISTORY</tt> on, and then manually import
commands whenever you need them using &lsquo;<tt>fc -RI</tt>&rsquo;.
</p>
</dd>
</dl>


<hr size="6">
<a name="Initialisation"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#History" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#Input_002fOutput" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#Options" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#Description-of-Options" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="Shell-Builtin-Commands.html#Shell-Builtin-Commands" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="zsh.html#Top" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="zsh_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="Concept-Index.html#Concept-Index" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="zsh_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h3 class="subsection">16.2.5 Initialisation</h3>
<dl compact="compact">
<dd><a name="index-ALL_005fEXPORT"></a>
<a name="index-NO_005fALL_005fEXPORT"></a>
<a name="index-ALLEXPORT"></a>
<a name="index-NOALLEXPORT"></a>
<a name="index-export_002c-automatic"></a>
</dd>
<dt> <tt>ALL_EXPORT</tt> (<tt>-a</tt>, ksh: <tt>-a</tt>)</dt>
<dd><p>All parameters subsequently defined are automatically exported.
</p>
<a name="index-GLOBAL_005fEXPORT"></a>
<a name="index-NO_005fGLOBAL_005fEXPORT"></a>
<a name="index-GLOBALEXPORT"></a>
<a name="index-NOGLOBALEXPORT"></a>
<a name="index-environment_002c-and-local-parameters"></a>
</dd>
<dt> <tt>GLOBAL_EXPORT</tt> (<tt>&lt;Z&gt;</tt>)</dt>
<dd><p>If this option is set, passing the <tt>-x</tt> flag to the builtins <tt>declare</tt>,
<tt>float</tt>, <tt>integer</tt>, <tt>readonly</tt> and <tt>typeset</tt> (but not <tt>local</tt>)
will also set the <tt>-g</tt> flag;  hence parameters exported to
the environment will not be made local to the enclosing function, unless
they were already or the flag <tt>+g</tt> is given explicitly.  If the option is
unset, exported parameters will be made local in just the same way as any
other parameter.
</p>
<p>This option is set by default for backward compatibility; it is not
recommended that its behaviour be relied upon.  Note that the builtin
<tt>export</tt> always sets both the <tt>-x</tt> and <tt>-g</tt> flags, and hence its
effect extends beyond the scope of the enclosing function; this is the
most portable way to achieve this behaviour.
</p>
<a name="index-exporting_002c-and-local-parameters"></a>
<a name="index-GLOBAL_005fRCS"></a>
<a name="index-NO_005fGLOBAL_005fRCS"></a>
<a name="index-GLOBALRCS"></a>
<a name="index-NOGLOBALRCS"></a>
<a name="index-startup-files_002c-global_002c-inhibiting"></a>
<a name="index-files_002c-global-startup_002c-inhibiting"></a>
</dd>
<dt> <tt>GLOBAL_RCS</tt> (<tt>-d</tt>) &lt;D&gt;</dt>
<dd><p>If this option is unset, the startup files <tt>/etc/zprofile</tt>,
<tt>/etc/zshrc</tt>, <tt>/etc/zlogin</tt> and <tt>/etc/zlogout</tt> will not be run.  It
can be disabled and re-enabled at any time, including inside local startup
files (<tt>.zshrc</tt>, etc.).
</p>
<a name="index-RCS"></a>
<a name="index-NO_005fRCS"></a>
<a name="index-NORCS"></a>
<a name="index-startup-files_002c-sourcing"></a>
</dd>
<dt> <tt>RCS</tt> (<tt>+f</tt>) &lt;D&gt;</dt>
<dd><p>After <tt>/etc/zshenv</tt> is sourced on startup, source the
<tt>.zshenv</tt>, <tt>/etc/zprofile</tt>, <tt>.zprofile</tt>,
<tt>/etc/zshrc</tt>, <tt>.zshrc</tt>, <tt>/etc/zlogin</tt>, <tt>.zlogin</tt>, and <tt>.zlogout</tt>
files, as described in <a href="Files.html#Files">Files</a>.
If this option is unset, the <tt>/etc/zshenv</tt> file is still sourced, but any
of the others will not be; it can be set at any time to prevent the
remaining startup files after the currently executing one from
being sourced.
</p>
</dd>
</dl>


<hr size="6">
<a name="Input_002fOutput"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#Initialisation" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#Job-Control" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#Options" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#Description-of-Options" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="Shell-Builtin-Commands.html#Shell-Builtin-Commands" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="zsh.html#Top" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="zsh_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="Concept-Index.html#Concept-Index" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="zsh_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h3 class="subsection">16.2.6 Input/Output</h3>
<dl compact="compact">
<dd><a name="index-ALIASES"></a>
<a name="index-NO_005fALIASES"></a>
<a name="index-NOALIASES"></a>
<a name="index-aliases_002c-expansion"></a>
</dd>
<dt> <tt>ALIASES</tt> &lt;D&gt;</dt>
<dd><p>Expand aliases.
</p>
<a name="index-CLOBBER"></a>
<a name="index-NO_005fCLOBBER"></a>
<a name="index-NOCLOBBER"></a>
<a name="index-clobbering_002c-of-files"></a>
<a name="index-file-clobbering_002c-allowing"></a>
</dd>
<dt> <tt>CLOBBER</tt> (<tt>+C</tt>, ksh: <tt>+C</tt>) &lt;D&gt;</dt>
<dd><p>Allows &lsquo;<tt>&gt;</tt>&rsquo; redirection to truncate existing files,
and &lsquo;<tt>&gt;&gt;</tt>&rsquo; to create files.
Otherwise &lsquo;<tt>&gt;!</tt>&rsquo; or &lsquo;<tt>&gt;|</tt>&rsquo; must be used to truncate a file,
and &lsquo;<tt>&gt;&gt;!</tt>&rsquo; or &lsquo;<tt>&gt;&gt;|</tt>&rsquo; to create a file.
</p>
<a name="index-CORRECT"></a>
<a name="index-NO_005fCORRECT"></a>
<a name="index-NOCORRECT"></a>
<a name="index-correction_002c-spelling"></a>
<a name="index-spelling-correction"></a>
</dd>
<dt> <tt>CORRECT</tt> (<tt>-0</tt>)</dt>
<dd><p>Try to correct the spelling of commands.
Note that, when the <tt>HASH_LIST_ALL</tt> option is not set or when some
directories in the path are not readable, this may falsely report spelling
errors the first time some commands are used.
</p>
<p>The shell variable <tt>CORRECT_IGNORE</tt> may be set to a pattern to
match words that will never be offered as corrections.
</p>
<a name="index-CORRECT_005fALL"></a>
<a name="index-NO_005fCORRECT_005fALL"></a>
<a name="index-CORRECTALL"></a>
<a name="index-NOCORRECTALL"></a>
</dd>
<dt> <tt>CORRECT_ALL</tt> (<tt>-O</tt>)</dt>
<dd><p>Try to correct the spelling of all arguments in a line.
</p>
<a name="index-DVORAK"></a>
<a name="index-NO_005fDVORAK"></a>
<a name="index-NODVORAK"></a>
</dd>
<dt> <tt>DVORAK</tt></dt>
<dd><p>Use the Dvorak keyboard instead of the standard qwerty keyboard as a basis
for examining spelling mistakes for the <tt>CORRECT</tt> and <tt>CORRECT_ALL</tt>
options and the <tt>spell-word</tt> editor command.
</p>
<a name="index-FLOW_005fCONTROL"></a>
<a name="index-NO_005fFLOW_005fCONTROL"></a>
<a name="index-FLOWCONTROL"></a>
<a name="index-NOFLOWCONTROL"></a>
<a name="index-flow-control"></a>
</dd>
<dt> <tt>FLOW_CONTROL</tt> &lt;D&gt;</dt>
<dd><p>If this option is unset,
output flow control via start/stop characters (usually assigned to
^S/^Q) is disabled in the shell&rsquo;s editor.
</p>
<a name="index-IGNORE_005fEOF"></a>
<a name="index-NO_005fIGNORE_005fEOF"></a>
<a name="index-IGNOREEOF"></a>
<a name="index-NOIGNOREEOF"></a>
<a name="index-EOF_002c-ignoring"></a>
</dd>
<dt> <tt>IGNORE_EOF</tt> (<tt>-7</tt>)</dt>
<dd><p>Do not exit on end-of-file.  Require the use
of <tt>exit</tt> or <tt>logout</tt> instead.
However, ten consecutive EOFs will cause the shell to exit anyway,
to avoid the shell hanging if its tty goes away.
</p>
<p>Also, if this option is set and the Zsh Line Editor is used, widgets
implemented by shell functions can be bound to EOF (normally
Control-D) without printing the normal warning message.  This works
only for normal widgets, not for completion widgets.
</p>
<a name="index-INTERACTIVE_005fCOMMENTS"></a>
<a name="index-NO_005fINTERACTIVE_005fCOMMENTS"></a>
<a name="index-INTERACTIVECOMMENTS"></a>
<a name="index-NOINTERACTIVECOMMENTS"></a>
<a name="index-comments_002c-in-interactive-shells"></a>
</dd>
<dt> <tt>INTERACTIVE_COMMENTS</tt> (<tt>-k</tt>) &lt;K&gt; &lt;S&gt;</dt>
<dd><p>Allow comments even in interactive shells.
</p>
<a name="index-HASH_005fCMDS"></a>
<a name="index-NO_005fHASH_005fCMDS"></a>
<a name="index-HASHCMDS"></a>
<a name="index-NOHASHCMDS"></a>
<a name="index-hashing_002c-of-commands"></a>
<a name="index-command-hashing"></a>
</dd>
<dt> <tt>HASH_CMDS</tt> &lt;D&gt;</dt>
<dd><p>Note the location of each command the first time it is executed.
Subsequent invocations of the same command will use the
saved location, avoiding a path search.
If this option is unset, no path hashing is done at all.
However, when <tt>CORRECT</tt> is set, commands whose names do not appear in
the functions or aliases hash tables are hashed in order to avoid
reporting them as spelling errors.
</p>
<a name="index-HASH_005fDIRS"></a>
<a name="index-NO_005fHASH_005fDIRS"></a>
<a name="index-HASHDIRS"></a>
<a name="index-NOHASHDIRS"></a>
<a name="index-hashing_002c-of-directories"></a>
<a name="index-directories_002c-hashing"></a>
</dd>
<dt> <tt>HASH_DIRS</tt> &lt;D&gt;</dt>
<dd><p>Whenever a command name is hashed, hash the directory containing it,
as well as all directories that occur earlier in the path.
Has no effect if neither <tt>HASH_CMDS</tt> nor <tt>CORRECT</tt> is set.
</p>
<a name="index-HASH_005fEXECUTABLES_005fONLY"></a>
<a name="index-NO_005fHASH_005fEXECUTABLES_005fONLY"></a>
<a name="index-HASHEXECUTABLESONLY"></a>
<a name="index-NOHASHEXECUTABLESONLY"></a>
<a name="index-hashing_002c-of-executables"></a>
<a name="index-executables_002c-hashing"></a>
</dd>
<dt> <tt>HASH_EXECUTABLES_ONLY</tt></dt>
<dd><p>When hashing commands because of <tt>HASH_COMMANDS</tt>, check that the
file to be hashed is actually an executable.  This option
is unset by default as if the path contains a large number of commands,
or consists of many remote files, the additional tests can take
a long time.  Trial and error is needed to show if this option is
beneficial.
</p>
<a name="index-MAIL_005fWARNING"></a>
<a name="index-NO_005fMAIL_005fWARNING"></a>
<a name="index-MAILWARNING"></a>
<a name="index-NOMAILWARNING"></a>
<a name="index-mail_002c-warning-of-reading"></a>
</dd>
<dt> <tt>MAIL_WARNING</tt> (<tt>-U</tt>)</dt>
<dd><p>Print a warning message if a mail file has been
accessed since the shell last checked.
</p>
<a name="index-PATH_005fDIRS"></a>
<a name="index-NO_005fPATH_005fDIRS"></a>
<a name="index-PATHDIRS"></a>
<a name="index-NOPATHDIRS"></a>
<a name="index-path-search_002c-extended"></a>
</dd>
<dt> <tt>PATH_DIRS</tt> (<tt>-Q</tt>)</dt>
<dd><p>Perform a path search even on command names with slashes in them.
Thus if &lsquo;<tt>/usr/local/bin</tt>&rsquo; is in the user&rsquo;s path, and he or she types
&lsquo;<tt>X11/xinit</tt>&rsquo;, the command &lsquo;<tt>/usr/local/bin/X11/xinit</tt>&rsquo; will be executed
(assuming it exists).
Commands explicitly beginning with &lsquo;<tt>/</tt>&rsquo;, &lsquo;<tt>./</tt>&rsquo; or &lsquo;<tt>../</tt>&rsquo;
are not subject to the path search.
This also applies to the &lsquo;<tt>.</tt>&rsquo; builtin.
</p>
<p>Note that subdirectories of the current directory are always searched for
executables specified in this form.  This takes place before any search
indicated by this option, and regardless of whether &lsquo;<tt>.</tt>&rsquo; or the current
directory appear in the command search path.
</p>
<a name="index-PATH_005fSCRIPT"></a>
<a name="index-NO_005fPATH_005fSCRIPT"></a>
<a name="index-PATHSCRIPT"></a>
<a name="index-NOPATHSCRIPT"></a>
<a name="index-path-search_002c-for-script-argument-to-shell"></a>
</dd>
<dt> <tt>PATH_SCRIPT</tt> &lt;K&gt; &lt;S&gt;</dt>
<dd><p>If this option is not set, a script passed as the first non-option argument
to the shell must contain the name of the file to open.  If this
option is set, and the script does not specify a directory path,
the script is looked for first in the current directory, then in the
command path.  See
<a href="Invocation.html#Invocation">Invocation</a>.
</p>
<a name="index-PRINT_005fEIGHT_005fBIT"></a>
<a name="index-NO_005fPRINT_005fEIGHT_005fBIT"></a>
<a name="index-PRINTEIGHTBIT"></a>
<a name="index-NOPRINTEIGHTBIT"></a>
<a name="index-eight-bit-characters_002c-printing"></a>
</dd>
<dt> <tt>PRINT_EIGHT_BIT</tt></dt>
<dd><p>Print eight bit characters literally in completion lists, etc.
This option is not necessary if your system correctly returns the
printability of eight bit characters (see man page ctype(3)).
</p>
<a name="index-PRINT_005fEXIT_005fVALUE"></a>
<a name="index-NO_005fPRINT_005fEXIT_005fVALUE"></a>
<a name="index-PRINTEXITVALUE"></a>
<a name="index-NOPRINTEXITVALUE"></a>
<a name="index-exit-status_002c-printing"></a>
</dd>
<dt> <tt>PRINT_EXIT_VALUE</tt> (<tt>-1</tt>)</dt>
<dd><p>Print the exit value of programs with non-zero exit status.
</p>
<a name="index-RC_005fQUOTES"></a>
<a name="index-NO_005fRC_005fQUOTES"></a>
<a name="index-RCQUOTES"></a>
<a name="index-NORCQUOTES"></a>
<a name="index-rc_002c-quoting-style"></a>
<a name="index-quoting-style_002c-rc"></a>
</dd>
<dt> <tt>RC_QUOTES</tt></dt>
<dd><p>Allow the character sequence &lsquo;<tt>&rsquo;&rsquo;</tt>&rsquo; to signify a single quote
within singly quoted strings.  Note this does not apply in quoted strings
using the format <tt>$&rsquo;</tt><var>...</var><tt>&rsquo;</tt>, where a backslashed single quote can
be used.
</p>
<a name="index-RM_005fSTAR_005fSILENT"></a>
<a name="index-NO_005fRM_005fSTAR_005fSILENT"></a>
<a name="index-RMSTARSILENT"></a>
<a name="index-NORMSTARSILENT"></a>
<a name="index-rm-_002a_002c-querying-before"></a>
<a name="index-querying-before-rm-_002a"></a>
</dd>
<dt> <tt>RM_STAR_SILENT</tt> (<tt>-H</tt>) &lt;K&gt; &lt;S&gt;</dt>
<dd><p>Do not query the user before executing &lsquo;<tt>rm *</tt>&rsquo; or &lsquo;<tt>rm path/*</tt>&rsquo;.
</p>
<a name="index-RM_005fSTAR_005fWAIT"></a>
<a name="index-NO_005fRM_005fSTAR_005fWAIT"></a>
<a name="index-RMSTARWAIT"></a>
<a name="index-NORMSTARWAIT"></a>
<a name="index-rm-_002a_002c-waiting-before"></a>
<a name="index-waiting-before-rm-_002a"></a>
</dd>
<dt> <tt>RM_STAR_WAIT</tt></dt>
<dd><p>If querying the user before executing &lsquo;<tt>rm *</tt>&rsquo; or &lsquo;<tt>rm path/*</tt>&rsquo;,
first wait ten seconds and ignore anything typed in that time.
This avoids the problem of reflexively answering &lsquo;yes&rsquo; to the query
when one didn&rsquo;t really mean it.  The wait and query can always be
avoided by expanding the &lsquo;<tt>*</tt>&rsquo; in ZLE (with tab).
</p>
<a name="index-SHORT_005fLOOPS"></a>
<a name="index-NO_005fSHORT_005fLOOPS"></a>
<a name="index-SHORTLOOPS"></a>
<a name="index-NOSHORTLOOPS"></a>
</dd>
<dt> <tt>SHORT_LOOPS</tt> &lt;C&gt; &lt;Z&gt;</dt>
<dd><p>Allow the short forms of <tt>for</tt>, <tt>repeat</tt>, <tt>select</tt>,
<tt>if</tt>, and <tt>function</tt> constructs.
</p>
<a name="index-SUN_005fKEYBOARD_005fHACK"></a>
<a name="index-NO_005fSUN_005fKEYBOARD_005fHACK"></a>
<a name="index-SUNKEYBOARDHACK"></a>
<a name="index-NOSUNKEYBOARDHACK"></a>
<a name="index-sun-keyboard_002c-annoying"></a>
<a name="index-annoying-keyboard_002c-sun"></a>
</dd>
<dt> <tt>SUN_KEYBOARD_HACK</tt> (<tt>-L</tt>)</dt>
<dd><p>If a line ends with a backquote, and there are an odd number
of backquotes on the line, ignore the trailing backquote.
This is useful on some keyboards where the return key is
too small, and the backquote key lies annoyingly close to it.
As an alternative the variable <tt>KEYBOARD_HACK</tt> lets you choose the
character to be removed.
</p>
</dd>
</dl>


<hr size="6">
<a name="Job-Control"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#Input_002fOutput" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#Prompting" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#Options" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#Description-of-Options" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="Shell-Builtin-Commands.html#Shell-Builtin-Commands" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="zsh.html#Top" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="zsh_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="Concept-Index.html#Concept-Index" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="zsh_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h3 class="subsection">16.2.7 Job Control</h3>
<dl compact="compact">
<dd><a name="index-AUTO_005fCONTINUE"></a>
<a name="index-NO_005fAUTO_005fCONTINUE"></a>
<a name="index-AUTOCONTINUE"></a>
<a name="index-NOAUTOCONTINUE"></a>
<a name="index-jobs_002c-continuing-automatically"></a>
<a name="index-continuing-jobs-automatically"></a>
</dd>
<dt> <tt>AUTO_CONTINUE</tt></dt>
<dd><p>With this option set, stopped jobs that are removed from the job table
with the <tt>disown</tt> builtin command are automatically sent a <tt>CONT</tt>
signal to make them running.
</p>
<a name="index-AUTO_005fRESUME"></a>
<a name="index-NO_005fAUTO_005fRESUME"></a>
<a name="index-AUTORESUME"></a>
<a name="index-NOAUTORESUME"></a>
<a name="index-jobs_002c-resuming-automatically"></a>
<a name="index-resuming-jobs-automatically"></a>
</dd>
<dt> <tt>AUTO_RESUME</tt> (<tt>-W</tt>)</dt>
<dd><p>Treat single word simple commands without redirection
as candidates for resumption of an existing job.
</p>
<a name="index-BG_005fNICE"></a>
<a name="index-NO_005fBG_005fNICE"></a>
<a name="index-BGNICE"></a>
<a name="index-NOBGNICE"></a>
<a name="index-jobs_002c-background-priority"></a>
<a name="index-background-jobs_002c-priority-of"></a>
<a name="index-priority-of-background-jobs"></a>
</dd>
<dt> <tt>BG_NICE</tt> (<tt>-6</tt>) &lt;C&gt; &lt;Z&gt;</dt>
<dd><p>Run all background jobs at a lower priority.  This option
is set by default.
</p>
<a name="index-CHECK_005fJOBS"></a>
<a name="index-NO_005fCHECK_005fJOBS"></a>
<a name="index-CHECKJOBS"></a>
<a name="index-NOCHECKJOBS"></a>
<a name="index-exiting_002c-checking-jobs-when"></a>
<a name="index-logging-out_002c-checking-jobs-when"></a>
</dd>
<dt> <tt>CHECK_JOBS</tt> &lt;Z&gt;</dt>
<dd><p>Report the status of background and suspended jobs before exiting a shell
with job control; a second attempt to exit the shell will succeed.
<tt>NO_CHECK_JOBS</tt> is best used only in combination with <tt>NO_HUP</tt>, else
such jobs will be killed automatically.
</p>
<p>The check is omitted if the commands run from the previous command line
included a &lsquo;<tt>jobs</tt>&rsquo; command, since it is assumed the user is aware that
there are background or suspended jobs.  A &lsquo;<tt>jobs</tt>&rsquo; command run from one
of the hook functions defined in
the section Special Functions in <a href="Functions.html#Functions">Functions</a>
is not counted for this purpose.
</p>
<a name="index-HUP"></a>
<a name="index-NO_005fHUP"></a>
<a name="index-NOHUP"></a>
<a name="index-jobs_002c-HUP"></a>
</dd>
<dt> <tt>HUP</tt> &lt;Z&gt;</dt>
<dd><p>Send the <tt>HUP</tt> signal to running jobs when the
shell exits.
</p>
<a name="index-LONG_005fLIST_005fJOBS"></a>
<a name="index-NO_005fLONG_005fLIST_005fJOBS"></a>
<a name="index-LONGLISTJOBS"></a>
<a name="index-NOLONGLISTJOBS"></a>
<a name="index-jobs_002c-list-format"></a>
</dd>
<dt> <tt>LONG_LIST_JOBS</tt> (<tt>-R</tt>)</dt>
<dd><p>List jobs in the long format by default.
</p>
<a name="index-MONITOR"></a>
<a name="index-NO_005fMONITOR"></a>
<a name="index-NOMONITOR"></a>
<a name="index-job-control_002c-allowing"></a>
</dd>
<dt> <tt>MONITOR</tt> (<tt>-m</tt>, ksh: <tt>-m</tt>)</dt>
<dd><p>Allow job control.  Set by default in interactive shells.
</p>
<a name="index-NOTIFY"></a>
<a name="index-NO_005fNOTIFY"></a>
<a name="index-NONOTIFY"></a>
<a name="index-background-jobs_002c-notification"></a>
<a name="index-notification-of-background-jobs"></a>
</dd>
<dt> <tt>NOTIFY</tt> (<tt>-5</tt>, ksh: <tt>-b</tt>) &lt;Z&gt;</dt>
<dd><p>Report the status of background jobs immediately, rather than
waiting until just before printing a prompt.
</p>
<a name="index-POSIX_005fJOBS"></a>
<a name="index-POSIXJOBS"></a>
<a name="index-NO_005fPOSIX_005fJOBS"></a>
<a name="index-NOPOSIXJOBS"></a>
<a name="index-bg_002c-output-in-POSIX-format"></a>
<a name="index-fg_002c-output-in-POSIX-format"></a>
<a name="index-job-control_002c-in-subshell"></a>
<a name="index-jobs_002c-output-in-subshell"></a>
</dd>
<dt> <tt>POSIX_JOBS</tt> &lt;K&gt; &lt;S&gt;</dt>
<dd><p>This option makes job control more compliant with the POSIX standard.
</p>
<p>When the option is not set, the <tt>MONITOR</tt> option is unset on entry to
subshells, so that job control is no longer active.  When the option is
set, the <tt>MONITOR</tt> option and job control remain active in the
subshell, but note that the subshell has no access to jobs in the parent
shell.
</p>
<p>When the option is not set, jobs put in the background or foreground
with <tt>bg</tt> or <tt>fg</tt> are displayed with the same information that would
be reported by <tt>jobs</tt>.  When the option is set, only the text is
printed.  The output from <tt>jobs</tt> itself is not affected by the option.
</p>
<p>When the option is not set, job information from the parent
shell is saved for output within a subshell (for example, within a
pipeline).  When the option is set, the output of <tt>jobs</tt> is empty
until a job is started within the subshell.
</p>
<p>When the option is set, it becomes possible to use the <tt>wait</tt> builtin to
wait for the last job started in the background (as given by <tt>$!</tt>) even
if that job has already exited.  This works even if the option is turned
on temporarily around the use of the <tt>wait</tt> builtin.
</p>
</dd>
</dl>


<hr size="6">
<a name="Prompting"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#Job-Control" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#Scripts-and-Functions" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#Options" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#Description-of-Options" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="Shell-Builtin-Commands.html#Shell-Builtin-Commands" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="zsh.html#Top" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="zsh_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="Concept-Index.html#Concept-Index" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="zsh_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h3 class="subsection">16.2.8 Prompting</h3>
<dl compact="compact">
<dd><a name="index-PROMPT_005fBANG"></a>
<a name="index-NO_005fPROMPT_005fBANG"></a>
<a name="index-PROMPTBANG"></a>
<a name="index-NOPROMPTBANG"></a>
<a name="index-prompt_002c-_0021-expansion"></a>
</dd>
<dt> <tt>PROMPT_BANG</tt> &lt;K&gt;</dt>
<dd><p>If set, &lsquo;<tt>!</tt>&rsquo; is treated specially in prompt expansion.
See
<a href="Prompt-Expansion.html#Prompt-Expansion">Prompt Expansion</a>.
</p>
<a name="index-PROMPT_005fCR"></a>
<a name="index-NO_005fPROMPT_005fCR"></a>
<a name="index-PROMPTCR"></a>
<a name="index-NOPROMPTCR"></a>
<a name="index-prompt_002c-with-CR"></a>
</dd>
<dt> <tt>PROMPT_CR</tt> (<tt>+V</tt>) &lt;D&gt;</dt>
<dd><p>Print a carriage return just before printing
a prompt in the line editor.  This is on by default as multi-line editing
is only possible if the editor knows where the start of the line appears.
</p>
<a name="index-PROMPT_005fSP"></a>
<a name="index-NO_005fPROMPT_005fSP"></a>
<a name="index-PROMPTSP"></a>
<a name="index-NOPROMPTSP"></a>
<a name="index-prompt_002c-save-partial-lines"></a>
</dd>
<dt> <tt>PROMPT_SP</tt> &lt;D&gt;</dt>
<dd><p>Attempt to preserve a partial line (i.e. a line that did not end with a
newline) that would otherwise be covered up by the command prompt due to
the <tt>PROMPT_CR</tt> option.  This works by outputting some cursor-control
characters, including a series of spaces, that should make the terminal
wrap to the next line when a partial line is present (note that this is
only successful if your terminal has automatic margins, which is typical).
</p>
<p>When a partial line is preserved, by default you will see an inverse+bold
character at the end of the partial line:  a &quot;%&quot; for a normal user or
a &quot;#&quot; for root.  If set, the shell parameter <tt>PROMPT_EOL_MARK</tt> can be
used to customize how the end of partial lines are shown.
</p>
<p>NOTE: if the <tt>PROMPT_CR</tt> option is not set, enabling this option will
have no effect.  This option is on by default.
</p>
<a name="index-PROMPT_005fPERCENT"></a>
<a name="index-NO_005fPROMPT_005fPERCENT"></a>
<a name="index-PROMPTPERCENT"></a>
<a name="index-NOPROMPTPERCENT"></a>
<a name="index-prompt_002c-_0025-expansion"></a>
</dd>
<dt> <tt>PROMPT_PERCENT</tt> &lt;C&gt; &lt;Z&gt;</dt>
<dd><p>If set, &lsquo;<tt>%</tt>&rsquo; is treated specially in prompt expansion.
See
<a href="Prompt-Expansion.html#Prompt-Expansion">Prompt Expansion</a>.
</p>
<a name="index-PROMPT_005fSUBST"></a>
<a name="index-NO_005fPROMPT_005fSUBST"></a>
<a name="index-PROMPTSUBST"></a>
<a name="index-NOPROMPTSUBST"></a>
<a name="index-prompt_002c-parameter-expansion"></a>
</dd>
<dt> <tt>PROMPT_SUBST</tt> &lt;K&gt; &lt;S&gt;</dt>
<dd><p>If set, <em>parameter expansion</em>, <em>command substitution</em> and
<em>arithmetic expansion</em> are performed in prompts.  Substitutions
within prompts do not affect the command status.
</p>
<a name="index-TRANSIENT_005fRPROMPT"></a>
<a name="index-NO_005fTRANSIENT_005fRPROMPT"></a>
<a name="index-TRANSIENTRPROMPT"></a>
<a name="index-NOTRANSIENTRPROMPT"></a>
</dd>
<dt> <tt>TRANSIENT_RPROMPT</tt></dt>
<dd><p>Remove any right prompt from display when accepting a command
line.  This may be useful with terminals with other cut/paste methods.
</p>
</dd>
</dl>


<hr size="6">
<a name="Scripts-and-Functions"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#Prompting" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#Shell-Emulation" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#Options" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#Description-of-Options" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="Shell-Builtin-Commands.html#Shell-Builtin-Commands" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="zsh.html#Top" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="zsh_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="Concept-Index.html#Concept-Index" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="zsh_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h3 class="subsection">16.2.9 Scripts and Functions</h3>
<dl compact="compact">
<dd><a name="index-C_005fBASES"></a>
<a name="index-NO_005fC_005fBASES"></a>
<a name="index-CBASES"></a>
<a name="index-NOCBASES"></a>
<a name="index-bases_002c-output-in-C-format"></a>
<a name="index-hexadecimal_002c-output-in-C-format"></a>
<a name="index-octal_002c-output-in-C-format"></a>
</dd>
<dt> <tt>C_BASES</tt></dt>
<dd><p>Output hexadecimal numbers in the standard C format, for example &lsquo;<tt>0xFF</tt>&rsquo;
instead of the usual &lsquo;<tt>16#FF</tt>&rsquo;.  If the option <tt>OCTAL_ZEROES</tt> is also
set (it is not by default), octal numbers will be treated similarly and
hence appear as &lsquo;<tt>077</tt>&rsquo; instead of &lsquo;<tt>8#77</tt>&rsquo;.  This option has no effect
on the choice of the output base, nor on the output of bases other than
hexadecimal and octal.  Note that these formats will be understood on input
irrespective of the setting of <tt>C_BASES</tt>.
</p>
<a name="index-C_005fPRECEDENCES"></a>
<a name="index-NO_005fC_005fPRECEDENCES"></a>
<a name="index-CPRECEDENCES"></a>
<a name="index-NOCPRECEDENCES"></a>
<a name="index-precedence_002c-operator"></a>
<a name="index-operator-precedence"></a>
</dd>
<dt> <tt>C_PRECEDENCES</tt></dt>
<dd><p>This alters the precedence of arithmetic operators to be more
like C and other programming languages;
Arithmetic Evaluation
has an explicit list.
</p>
<a name="index-DEBUG_005fBEFORE_005fCMD-_003cD_003e"></a>
<a name="index-NO_005fDEBUG_005fBEFORE_005fCMD-_003cD_003e"></a>
<a name="index-DEBUGBEFORECMD-_003cD_003e"></a>
<a name="index-NODEBUGBEFORECMD-_003cD_003e"></a>
<a name="index-traps_002c-DEBUG_002c-before-or-after-command"></a>
<a name="index-DEBUG-trap_002c-before-or-after-command"></a>
</dd>
<dt> <tt>DEBUG_BEFORE_CMD</tt></dt>
<dd><p>Run the <tt>DEBUG</tt> trap before each command; otherwise it is run after
each command.  Setting this option mimics the behaviour of ksh 93; with
the option unset the behaviour is that of ksh 88.
</p>
<a name="index-ERR_005fEXIT"></a>
<a name="index-NO_005fERR_005fEXIT"></a>
<a name="index-ERREXIT"></a>
<a name="index-NOERREXIT"></a>
<a name="index-exit-status_002c-trapping"></a>
</dd>
<dt> <tt>ERR_EXIT</tt> (<tt>-e</tt>, ksh: <tt>-e</tt>)</dt>
<dd><p>If a command has a non-zero exit status, execute the <tt>ZERR</tt>
trap, if set, and exit.  This is disabled while running initialization
scripts.
</p>
<p>The behaviour is also disabled inside <tt>DEBUG</tt> traps.  In this
case the option is handled specially: it is unset on entry to
the trap.  If the option <tt>DEBUG_BEFORE_CMD</tt> is set,
as it is by default, and the option <tt>ERR_EXIT</tt> is found to have been set
on exit, then the command for which the <tt>DEBUG</tt> trap is being executed is
skipped.  The option is restored after the trap exits.
</p>
<a name="index-ERR_005fRETURN"></a>
<a name="index-NO_005fERR_005fRETURN"></a>
<a name="index-ERRRETURN"></a>
<a name="index-NOERRRETURN"></a>
<a name="index-function-return_002c-on-error"></a>
<a name="index-return-from-function_002c-on-error"></a>
</dd>
<dt> <tt>ERR_RETURN</tt></dt>
<dd><p>If a command has a non-zero exit status, return immediately from the
enclosing function.  The logic is identical to that for <tt>ERR_EXIT</tt>,
except that an implicit <tt>return</tt> statement is executed instead of an
<tt>exit</tt>.  This will trigger an exit at the outermost level of a
non-interactive script.
</p>
<a name="index-EVAL_005fLINENO"></a>
<a name="index-NO_005fEVAL_005fLINENO"></a>
<a name="index-EVALLINENO"></a>
<a name="index-NOEVALLINENO"></a>
<a name="index-line-number_002c-in-evaluated-expression"></a>
</dd>
<dt> <tt>EVAL_LINENO</tt> &lt;Z&gt;</dt>
<dd><p>If set, line numbers of expressions evaluated using the builtin <tt>eval</tt>
are tracked separately of the enclosing environment.  This applies both
to the parameter <tt>LINENO</tt> and the line number output by the prompt
escape <tt>%i</tt>.  If the option is set, the prompt escape <tt>%N</tt> will output
the string &lsquo;<tt>(eval)</tt>&rsquo; instead of the script or function name as an
indication.   (The two prompt escapes are typically used in the parameter
<tt>PS4</tt> to be output when the option <tt>XTRACE</tt> is set.)  If
<tt>EVAL_LINENO</tt> is unset, the line number of the surrounding script or
function is retained during the evaluation.
</p>
<a name="index-EXEC"></a>
<a name="index-NO_005fEXEC"></a>
<a name="index-NOEXEC"></a>
<a name="index-command-execution_002c-enabling"></a>
</dd>
<dt> <tt>EXEC</tt> (<tt>+n</tt>, ksh: <tt>+n</tt>) &lt;D&gt;</dt>
<dd><p>Do execute commands.  Without this option, commands are
read and checked for syntax errors, but not executed.
This option cannot be turned off in an interactive shell,
except when &lsquo;<tt>-n</tt>&rsquo; is supplied to the shell at startup.
</p>
<a name="index-FUNCTION_005fARGZERO"></a>
<a name="index-NO_005fFUNCTION_005fARGZERO"></a>
<a name="index-FUNCTIONARGZERO"></a>
<a name="index-NOFUNCTIONARGZERO"></a>
<a name="index-_00240_002c-setting"></a>
</dd>
<dt> <tt>FUNCTION_ARGZERO</tt> &lt;C&gt; &lt;Z&gt;</dt>
<dd><p>When executing a shell function or sourcing a script, set <tt>$0</tt>
temporarily to the name of the function/script.
</p>
<a name="index-LOCAL_005fOPTIONS"></a>
<a name="index-NO_005fLOCAL_005fOPTIONS"></a>
<a name="index-LOCALOPTIONS"></a>
<a name="index-NOLOCALOPTIONS"></a>
</dd>
<dt> <tt>LOCAL_OPTIONS</tt> &lt;K&gt;</dt>
<dd><p>If this option is set at the point of return from a shell function,
most options (including this one) which were in force upon entry to
the function are restored; options that are not restored are
<tt>PRIVILEGED</tt> and <tt>RESTRICTED</tt>.  Otherwise, only this option and the
<tt>XTRACE</tt> and <tt>PRINT_EXIT_VALUE</tt> options are restored.  Hence
if this is explicitly unset by a shell function the other options in
force at the point of return will remain so.
A shell function can also guarantee itself a known shell configuration
with a formulation like &lsquo;<tt>emulate -L zsh</tt>&rsquo;; the <tt>-L</tt> activates
<tt>LOCAL_OPTIONS</tt>.
</p>
<a name="index-LOCAL_005fTRAPS"></a>
<a name="index-NO_005fLOCAL_005fTRAPS"></a>
<a name="index-LOCALTRAPS"></a>
<a name="index-NOLOCALTRAPS"></a>
</dd>
<dt> <tt>LOCAL_TRAPS</tt> &lt;K&gt;</dt>
<dd><p>If this option is set when a signal trap is set inside a function, then the
previous status of the trap for that signal will be restored when the
function exits.  Note that this option must be set <em>prior</em> to altering the
trap behaviour in a function; unlike <tt>LOCAL_OPTIONS</tt>, the value on exit
from the function is irrelevant.  However, it does not need to be set
before any global trap for that to be correctly restored by a function.
For example,
</p>
<table><tr><td>&nbsp;</td><td><pre class="example">unsetopt localtraps
trap - INT
fn() { setopt localtraps; trap '' INT; sleep 3; }
</pre></td></tr></table>

<p>will restore normal handling of <tt>SIGINT</tt> after the function exits.
</p>
<a name="index-MULTI_005fFUNC_005fDEF"></a>
<a name="index-NO_005fMULTI_005fFUNC_005fDEF"></a>
<a name="index-MULTIFUNCDEF"></a>
<a name="index-NOMULTIFUNCDEF"></a>
</dd>
<dt> <tt>MULTI_FUNC_DEF</tt> &lt;Z&gt;</dt>
<dd><p>Allow definitions of multiple functions at once in the form &lsquo;<tt>fn1
fn2</tt><var>...</var><tt>()</tt>&rsquo;; if the option is not set, this causes
a parse error.  Definition of multiple functions with the <tt>function</tt>
keyword is always allowed.  Multiple function definitions are not often
used and can cause obscure errors.
</p>
<a name="index-MULTIOS"></a>
<a name="index-NO_005fMULTIOS"></a>
<a name="index-NOMULTIOS"></a>
</dd>
<dt> <tt>MULTIOS</tt> &lt;Z&gt;</dt>
<dd><p>Perform implicit <cite>tee</cite>s or <cite>cat</cite>s when multiple
redirections are attempted (see <a href="Redirection.html#Redirection">Redirection</a>).
</p>
<a name="index-OCTAL_005fZEROES"></a>
<a name="index-NO_005fOCTAL_005fZEROES"></a>
<a name="index-OCTALZEROES"></a>
<a name="index-NOOCTALZEROES"></a>
<a name="index-octal_002c-arithmetic-expressions"></a>
</dd>
<dt> <tt>OCTAL_ZEROES</tt> &lt;S&gt;</dt>
<dd><p>Interpret any integer constant beginning with a 0 as octal, per IEEE Std
1003.2-1992 (ISO 9945-2:1993).  This is not enabled by default as it
causes problems with parsing of, for example, date and time strings with
leading zeroes.
</p>
<p>Sequences of digits indicating a numeric base such as the &lsquo;<tt>08</tt>&rsquo;
component in &lsquo;<tt>08#77</tt>&rsquo; are always interpreted as decimal, regardless
of leading zeroes.
</p>
<a name="index-SOURCE_005fTRACE"></a>
<a name="index-NO_005fSOURCE_005fTRACE"></a>
<a name="index-SOURCETRACE"></a>
<a name="index-NOSOURCETRACE"></a>
</dd>
<dt> <tt>SOURCE_TRACE</tt></dt>
<dd><p>If set, zsh will print an informational message announcing the name of
each file it loads.  The format of the output is similar to that
for the <tt>XTRACE</tt> option, with the message <tt>&lt;sourcetrace&gt;</tt>.
A file may be loaded by the shell itself when it
starts up and shuts down (<tt>Startup/Shutdown Files</tt>) or by the use of
the &lsquo;<tt>source</tt>&rsquo; and &lsquo;<tt>dot</tt>&rsquo; builtin commands.
</p>
<a name="index-TYPESET_005fSILENT"></a>
<a name="index-NO_005fTYPESET_005fSILENT"></a>
<a name="index-TYPESETSILENT"></a>
<a name="index-NOTYPESETSILENT"></a>
</dd>
<dt> <tt>TYPESET_SILENT</tt></dt>
<dd><p>If this is unset, executing any of the &lsquo;<tt>typeset</tt>&rsquo; family of
commands with no options and a list of parameters that have no values
to be assigned but already exist will display the value of the parameter.
If the option is set, they will only be shown when parameters are selected
with the &lsquo;<tt>-m</tt>&rsquo; option.  The option &lsquo;<tt>-p</tt>&rsquo; is available whether or not
the option is set.
</p>
<a name="index-VERBOSE"></a>
<a name="index-NO_005fVERBOSE"></a>
<a name="index-NOVERBOSE"></a>
<a name="index-tracing_002c-of-input-lines"></a>
<a name="index-input_002c-tracing"></a>
</dd>
<dt> <tt>VERBOSE</tt> (<tt>-v</tt>, ksh: <tt>-v</tt>)</dt>
<dd><p>Print shell input lines as they are read.
</p>
<a name="index-XTRACE"></a>
<a name="index-NO_005fXTRACE"></a>
<a name="index-NOXTRACE"></a>
<a name="index-tracing_002c-of-commands"></a>
<a name="index-commands_002c-tracing"></a>
</dd>
<dt> <tt>XTRACE</tt> (<tt>-x</tt>, ksh: <tt>-x</tt>)</dt>
<dd><p>Print commands and their arguments as they are executed.  The
output is proceded by the value of <tt>$PS4</tt>, formatted as described
in
<a href="Prompt-Expansion.html#Prompt-Expansion">Prompt Expansion</a>.
</p>
</dd>
</dl>


<hr size="6">
<a name="Shell-Emulation"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#Scripts-and-Functions" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#Shell-State" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#Options" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#Description-of-Options" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="Shell-Builtin-Commands.html#Shell-Builtin-Commands" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="zsh.html#Top" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="zsh_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="Concept-Index.html#Concept-Index" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="zsh_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h3 class="subsection">16.2.10 Shell Emulation</h3>
<dl compact="compact">
<dd><a name="index-BASH_005fREMATCH"></a>
<a name="index-NO_005fBASH_005fREMATCH"></a>
<a name="index-BASHREMATCH"></a>
<a name="index-NOBASHREMATCH"></a>
<a name="index-bash_002c-BASH_005fREMATCH-variable"></a>
<a name="index-regexp_002c-bash-BASH_005fREMATCH-variable"></a>
</dd>
<dt> <tt>BASH_REMATCH</tt></dt>
<dd><p>When set, matches performed with the <tt>=~</tt> operator will set the
<tt>BASH_REMATCH</tt> array variable, instead of the default <tt>MATCH</tt> and
<tt>match</tt> variables.  The first element of the <tt>BASH_REMATCH</tt> array
will contain the entire matched text and subsequent elements will contain
extracted substrings.  This option makes more sense when <tt>KSH_ARRAYS</tt> is
also set, so that the entire matched portion is stored at index 0 and the
first substring is at index 1.  Without this option, the <tt>MATCH</tt> variable
contains the entire matched text and the <tt>match</tt> array variable contains
substrings.
</p>
<a name="index-BSD_005fECHO"></a>
<a name="index-NO_005fBSD_005fECHO"></a>
<a name="index-BSDECHO"></a>
<a name="index-NOBSDECHO"></a>
<a name="index-echo_002c-BSD-compatible"></a>
</dd>
<dt> <tt>BSD_ECHO</tt> &lt;S&gt;</dt>
<dd><p>Make the <tt>echo</tt> builtin compatible with the BSD man page echo(1) command.
This disables backslashed escape sequences in echo strings unless the
<tt>-e</tt> option is specified.
</p>
<a name="index-CONTINUE_005fON_005fERROR"></a>
<a name="index-NO_005fCONTINUE_005fON_005fERROR"></a>
<a name="index-CONTINUEONERROR"></a>
<a name="index-NOCONTINUEONERROR"></a>
<a name="index-error_002c-option-to-continue-script-on"></a>
</dd>
<dt> <tt>CONTINUE_ON_ERROR</tt></dt>
<dd><p>If a fatal error is encountered (see 
<a href="Shell-Grammar.html#Errors">Errors</a>), and the code is running
in a script, the shell will resume execution at the next statement
in the script at the top level, in other words outside all functions
or shell constructs such as loops and conditions.  This mimics the
behaviour of interactive shells, where the shell returns to the
line editor to read a new command; it was the normal behaviour in versions
of zsh before 5.0.1.
</p>
<a name="index-CSH_005fJUNKIE_005fHISTORY"></a>
<a name="index-NO_005fCSH_005fJUNKIE_005fHISTORY"></a>
<a name="index-CSHJUNKIEHISTORY"></a>
<a name="index-NOCSHJUNKIEHISTORY"></a>
<a name="index-csh_002c-history-style"></a>
<a name="index-history-style_002c-csh"></a>
</dd>
<dt> <tt>CSH_JUNKIE_HISTORY</tt> &lt;C&gt;</dt>
<dd><p>A history reference without an event specifier will always refer to the
previous command.  Without this option, such a history reference refers
to the same event as the previous history reference, defaulting to the
previous command.
</p>
<a name="index-CSH_005fJUNKIE_005fLOOPS"></a>
<a name="index-NO_005fCSH_005fJUNKIE_005fLOOPS"></a>
<a name="index-CSHJUNKIELOOPS"></a>
<a name="index-NOCSHJUNKIELOOPS"></a>
<a name="index-csh_002c-loop-style"></a>
<a name="index-loop-style_002c-csh"></a>
</dd>
<dt> <tt>CSH_JUNKIE_LOOPS</tt> &lt;C&gt;</dt>
<dd><p>Allow loop bodies to take the form &lsquo;<var>list</var>; <tt>end</tt>&rsquo; instead of
&lsquo;<tt>do</tt> <var>list</var>; <tt>done</tt>&rsquo;.
</p>
<a name="index-CSH_005fJUNKIE_005fQUOTES"></a>
<a name="index-NO_005fCSH_005fJUNKIE_005fQUOTES"></a>
<a name="index-CSHJUNKIEQUOTES"></a>
<a name="index-NOCSHJUNKIEQUOTES"></a>
<a name="index-csh_002c-quoting-style"></a>
<a name="index-quoting-style_002c-csh"></a>
</dd>
<dt> <tt>CSH_JUNKIE_QUOTES</tt> &lt;C&gt;</dt>
<dd><p>Changes the rules for single- and double-quoted text to match that of
<cite>csh</cite>.  These require that embedded newlines be preceded by a backslash;
unescaped newlines will cause an error message.
In double-quoted strings, it is made impossible to escape &lsquo;<tt>$</tt>&rsquo;, &lsquo;<tt>&lsquo;</tt>&rsquo;
or &lsquo;<tt>&quot;</tt>&rsquo; (and &lsquo;<tt>\</tt>&rsquo; itself no longer needs escaping).
Command substitutions are only expanded once, and cannot be nested.
</p>
<a name="index-CSH_005fNULLCMD"></a>
<a name="index-NO_005fCSH_005fNULLCMD"></a>
<a name="index-CSHNULLCMD"></a>
<a name="index-NOCSHNULLCMD"></a>
<a name="index-NULLCMD_002c-ignoring"></a>
<a name="index-READNULLCMD_002c-ignoring"></a>
<a name="index-redirections-with-no-command_002c-csh"></a>
<a name="index-csh_002c-redirections-with-no-command"></a>
</dd>
<dt> <tt>CSH_NULLCMD</tt> &lt;C&gt;</dt>
<dd><p>Do not use the values of <tt>NULLCMD</tt> and <tt>READNULLCMD</tt> 
when running redirections with no command.  This make 
such redirections fail (see <a href="Redirection.html#Redirection">Redirection</a>).
</p>
<a name="index-KSH_005fARRAYS"></a>
<a name="index-NO_005fKSH_005fARRAYS"></a>
<a name="index-KSHARRAYS"></a>
<a name="index-NOKSHARRAYS"></a>
<a name="index-arrays_002c-ksh-style"></a>
<a name="index-array-style_002c-ksh"></a>
<a name="index-ksh_002c-array-style"></a>
</dd>
<dt> <tt>KSH_ARRAYS</tt> &lt;K&gt; &lt;S&gt;</dt>
<dd><p>Emulate <cite>ksh</cite> array handling as closely as possible.  If this option
is set, array elements are numbered from zero, an array parameter
without subscript refers to the first element instead of the whole array,
and braces are required to delimit a subscript (&lsquo;<tt>${path[2]}</tt>&rsquo; rather
than just &lsquo;<tt>$path[2]</tt>&rsquo;).
</p>
<a name="index-KSH_005fAUTOLOAD"></a>
<a name="index-NO_005fKSH_005fAUTOLOAD"></a>
<a name="index-KSHAUTOLOAD"></a>
<a name="index-NOKSHAUTOLOAD"></a>
</dd>
<dt> <tt>KSH_AUTOLOAD</tt> &lt;K&gt; &lt;S&gt;</dt>
<dd><p>Emulate <cite>ksh</cite> function autoloading.  This means that when a function is
autoloaded, the corresponding file is merely executed, and must define
the function itself.  (By default, the function is defined to the contents
of the file.  However, the most common <cite>ksh</cite>-style case - of the file
containing only a simple definition of the function - is always handled
in the <cite>ksh</cite>-compatible manner.)
</p>
<a name="index-KSH_005fOPTION_005fPRINT"></a>
<a name="index-NO_005fKSH_005fOPTION_005fPRINT"></a>
<a name="index-KSHOPTIONPRINT"></a>
<a name="index-NOKSHOPTIONPRINT"></a>
<a name="index-option-printing_002c-ksh-style"></a>
<a name="index-option-printing-style_002c-ksh"></a>
<a name="index-ksh_002c-option-printing-style"></a>
</dd>
<dt> <tt>KSH_OPTION_PRINT</tt> &lt;K&gt;</dt>
<dd><p>Alters the way options settings are printed: instead of separate lists of
set and unset options, all options are shown, marked &lsquo;on&rsquo; if
they are in the non-default state, &lsquo;off&rsquo; otherwise.
</p>
<a name="index-KSH_005fTYPESET"></a>
<a name="index-NO_005fKSH_005fTYPESET"></a>
<a name="index-KSHTYPESET"></a>
<a name="index-NOKSHTYPESET"></a>
<a name="index-argument-splitting_002c-in-typeset-etc_002e"></a>
<a name="index-ksh_002c-argument-splitting-in-typeset"></a>
</dd>
<dt> <tt>KSH_TYPESET</tt> &lt;K&gt;</dt>
<dd><p>Alters the way arguments to the <tt>typeset</tt> family of commands, including
<tt>declare</tt>, <tt>export</tt>, <tt>float</tt>, <tt>integer</tt>, <tt>local</tt> and
<tt>readonly</tt>, are processed.  Without this option, zsh will perform normal
word splitting after command and parameter expansion in arguments of an
assignment; with it, word splitting does not take place in those cases.
</p>
<a name="index-KSH_005fZERO_005fSUBSCRIPT"></a>
<a name="index-NO_005fKSH_005fZERO_005fSUBSCRIPT"></a>
<a name="index-KSHZEROSUBSCRIPT"></a>
<a name="index-NOKSHZEROSUBSCRIPT"></a>
<a name="index-arrays_002c-behaviour-of-index-zero"></a>
</dd>
<dt> <tt>KSH_ZERO_SUBSCRIPT</tt></dt>
<dd><p>Treat use of a subscript of value zero in array or string expressions as a
reference to the first element, i.e. the element that usually has the
subscript 1.  Ignored if <tt>KSH_ARRAYS</tt> is also set.
</p>
<p>If neither this option nor <tt>KSH_ARRAYS</tt> is set, accesses to an element of
an array or string with subscript zero return an empty element or string,
while attempts to set element zero of an array or string are treated as an
error.  However, attempts to set an otherwise valid subscript range that
includes zero will succeed.  For example, if <tt>KSH_ZERO_SUBSCRIPT</tt> is not
set,
</p>
<table><tr><td>&nbsp;</td><td><pre class="example">array[0]=(element)
</pre></td></tr></table>

<p>is an error, while
</p>
<table><tr><td>&nbsp;</td><td><pre class="example">array[0,1]=(element)
</pre></td></tr></table>

<p>is not and will replace the first element of the array.
</p>
<p>This option is for compatibility with older versions of the shell and
is not recommended in new code.
</p>
<a name="index-POSIX_005fALIASES"></a>
<a name="index-NO_005fPOSIX_005fALIASES"></a>
<a name="index-POSIXALIASES"></a>
<a name="index-NOPOSIXALIASES"></a>
</dd>
<dt> <tt>POSIX_ALIASES</tt> &lt;K&gt; &lt;S&gt;</dt>
<dd><p>When this option is set, reserved words are not candidates for
alias expansion:  it is still possible to declare any of them as an alias,
but the alias will never be expanded.  Reserved words are described in
<a href="Shell-Grammar.html#Reserved-Words">Reserved Words</a>.
</p>
<p>Alias expansion takes place while text is being read; hence when this
option is set it does not take effect until the end of any function or
other piece of shell code parsed as one unit.  Note this may
cause differences from other shells even when the option is in
effect.  For example, when running a command with &lsquo;<tt>zsh -c</tt>&rsquo;,
or even &lsquo;<tt>zsh -o posixaliases -c</tt>&rsquo;, the entire command argument is parsed
as one unit, so aliases defined within the argument are not available even
in later lines.  If in doubt, avoid use of aliases in non-interactive
code.
</p>
<a name="index-POSIX_005fBUILTINS"></a>
<a name="index-NO_005fPOSIX_005fBUILTINS"></a>
<a name="index-POSIXBUILTINS"></a>
<a name="index-NOPOSIXBUILTINS"></a>
</dd>
<dt> <tt>POSIX_BUILTINS</tt> &lt;K&gt; &lt;S&gt;</dt>
<dd><p>When this option is set the <tt>command</tt> builtin can be used to execute
shell builtin commands.  Parameter assignments specified before shell
functions and special builtins are kept after the command completes unless
the special builtin is prefixed with the <tt>command</tt> builtin.  Special
builtins are
<tt>.</tt>,
<tt>:</tt>,
<tt>break</tt>,
<tt>continue</tt>,
<tt>declare</tt>,
<tt>eval</tt>,
<tt>exit</tt>,
<tt>export</tt>,
<tt>integer</tt>,
<tt>local</tt>,
<tt>readonly</tt>,
<tt>return</tt>,
<tt>set</tt>,
<tt>shift</tt>,
<tt>source</tt>,
<tt>times</tt>,
<tt>trap</tt> and
<tt>unset</tt>.
</p>
<p>In addition, various error conditions associated with the above builtins
or <tt>exec</tt> cause a non-interactive shell to exit and an interactive
shell to return to its top-level processing.
</p>
<a name="index-POSIX_005fIDENTIFIERS"></a>
<a name="index-NO_005fPOSIX_005fIDENTIFIERS"></a>
<a name="index-POSIXIDENTIFIERS"></a>
<a name="index-NOPOSIXIDENTIFIERS"></a>
<a name="index-identifiers_002c-non_002dportable-characters-in"></a>
<a name="index-parameter-names_002c-non_002dportable-characters-in"></a>
</dd>
<dt> <tt>POSIX_IDENTIFIERS</tt> &lt;K&gt; &lt;S&gt;</dt>
<dd><p>When this option is set, only the ASCII characters <tt>a</tt> to <tt>z</tt>, <tt>A</tt> to
<tt>Z</tt>, <tt>0</tt> to <tt>9</tt> and <tt>_</tt> may be used in identifiers (names
of shell parameters and modules).
</p>
<p>When the option is unset and multibyte character support is enabled (i.e. it
is compiled in and the option <tt>MULTIBYTE</tt> is set), then additionally any
alphanumeric characters in the local character set may be used in
identifiers.  Note that scripts and functions written with this feature are
not portable, and also that both options must be set before the script
or function is parsed; setting them during execution is not sufficient
as the syntax <var>variable</var><tt>=</tt><var>value</var> has already been parsed as
a command rather than an assignment.
</p>
<p>If multibyte character support is not compiled into the shell this option is
ignored; all octets with the top bit set may be used in identifiers.
This is non-standard but is the traditional zsh behaviour.
</p>
<a name="index-POSIX_005fSTRINGS"></a>
<a name="index-NO_005fPOSIX_005fSTRINGS"></a>
<a name="index-POSIXSTRINGS"></a>
<a name="index-NOPOSIXSTRINGS"></a>
<a name="index-discarding-embedded-nulls-in-_0024_0027_002e_002e_002e_0027"></a>
<a name="index-embedded-nulls_002c-in-_0024_0027_002e_002e_002e_0027"></a>
<a name="index-nulls_002c-embedded-in-_0024_0027_002e_002e_002e_0027"></a>
</dd>
<dt> <tt>POSIX_STRINGS</tt> &lt;K&gt; &lt;S&gt;</dt>
<dd><p>This option affects processing of quoted strings.  Currently it only
affects the behaviour of null characters, i.e. character 0 in the
portable character set corresponding to US ASCII.
</p>
<p>When this option is not set, null characters embedded within strings
of the form <tt>$&rsquo;</tt><var>...</var><tt>&rsquo;</tt> are treated as ordinary characters. The
entire string is maintained within the shell and output to files where
necessary, although owing to restrictions of the library interface
the string is truncated at the null character in file names, environment
variables, or in arguments to external programs.
</p>
<p>When this option is set, the <tt>$&rsquo;</tt><var>...</var><tt>&rsquo;</tt> expression is truncated at
the null character.  Note that remaining parts of the same string
beyond the termination of the quotes are not trunctated.
</p>
<p>For example, the command line argument <tt>a$&rsquo;b\0c&rsquo;d</tt> is treated with
the option off as the characters <tt>a</tt>, <tt>b</tt>, null, <tt>c</tt>, <tt>d</tt>,
and with the option on as the characters <tt>a</tt>, <tt>b</tt>, <tt>d</tt>.
</p>
<a name="index-POSIX_005fTRAPS"></a>
<a name="index-NO_005fPOSIX_005fTRAPS"></a>
<a name="index-POSIXTRAPS"></a>
<a name="index-NOPOSIXTRAPS"></a>
<a name="index-traps_002c-on-function-exit"></a>
<a name="index-traps_002c-POSIX-compatibility"></a>
</dd>
<dt> <tt>POSIX_TRAPS</tt> &lt;K&gt; &lt;S&gt;</dt>
<dd><p>When the is option is set, the usual zsh behaviour of executing
traps for <tt>EXIT</tt> on exit from shell functions is suppressed.
In that case, manipulating <tt>EXIT</tt> traps always alters the global
trap for exiting the shell; the <tt>LOCAL_TRAPS</tt> option is
ignored for the <tt>EXIT</tt> trap.
</p>
<a name="index-SH_005fFILE_005fEXPANSION"></a>
<a name="index-NO_005fSH_005fFILE_005fEXPANSION"></a>
<a name="index-SHFILEEXPANSION"></a>
<a name="index-NOSHFILEEXPANSION"></a>
<a name="index-sh_002c-expansion-style"></a>
<a name="index-expansion-style_002c-sh"></a>
</dd>
<dt> <tt>SH_FILE_EXPANSION</tt> &lt;K&gt; &lt;S&gt;</dt>
<dd><p>Perform filename expansion (e.g., ~ expansion) <em>before</em>
parameter expansion, command substitution, arithmetic expansion
and brace expansion.
If this option is unset, it is performed <em>after</em>
brace expansion, so things like &lsquo;<tt>~$USERNAME</tt>&rsquo; and
&lsquo;<tt>~{pfalstad,rc}</tt>&rsquo; will work.
</p>
<a name="index-SH_005fNULLCMD"></a>
<a name="index-NO_005fSH_005fNULLCMD"></a>
<a name="index-SHNULLCMD"></a>
<a name="index-NOSHNULLCMD"></a>
<a name="index-NULLCMD_002c-ignoring-1"></a>
<a name="index-READNULLCMD_002c-ignoring-1"></a>
<a name="index-sh_002c-redirections-with-no-command"></a>
<a name="index-ksh_002c-redirections-with-no-command"></a>
<a name="index-redirections-with-no-command_002c-sh"></a>
<a name="index-redirections-with-no-command_002c-ksh"></a>
</dd>
<dt> <tt>SH_NULLCMD</tt> &lt;K&gt; &lt;S&gt;</dt>
<dd><p>Do not use the values of <tt>NULLCMD</tt> and <tt>READNULLCMD</tt> 
when doing redirections, use &lsquo;<tt>:</tt>&rsquo; instead (see <a href="Redirection.html#Redirection">Redirection</a>).
</p>
<a name="index-SH_005fOPTION_005fLETTERS"></a>
<a name="index-NO_005fSH_005fOPTION_005fLETTERS"></a>
<a name="index-SHOPTIONLETTERS"></a>
<a name="index-NOSHOPTIONLETTERS"></a>
<a name="index-sh_002c-single-letter-options-style"></a>
<a name="index-ksh_002c-single-letter-options-style"></a>
<a name="index-single-letter-options_002c-ksh-style"></a>
<a name="index-options_002c-single-letter_002c-ksh-style"></a>
</dd>
<dt> <tt>SH_OPTION_LETTERS</tt> &lt;K&gt; &lt;S&gt;</dt>
<dd><p>If this option is set the shell tries to interpret single letter options
(which are used with <tt>set</tt> and <tt>setopt</tt>) like <cite>ksh</cite> does.
This also affects the value of the <tt>-</tt> special parameter.
</p>
<a name="index-SH_005fWORD_005fSPLIT"></a>
<a name="index-NO_005fSH_005fWORD_005fSPLIT"></a>
<a name="index-SHWORDSPLIT"></a>
<a name="index-NOSHWORDSPLIT"></a>
<a name="index-field-splitting_002c-sh-style"></a>
<a name="index-sh_002c-field-splitting-style"></a>
</dd>
<dt> <tt>SH_WORD_SPLIT</tt> (<tt>-y</tt>) &lt;K&gt; &lt;S&gt;</dt>
<dd><p>Causes field splitting to be performed on unquoted parameter expansions.
Note that this option has nothing to do with word splitting.
(See <a href="Expansion.html#Parameter-Expansion">Parameter Expansion</a>.)
</p>
<a name="index-TRAPS_005fASYNC"></a>
<a name="index-NO_005fTRAPS_005fASYNC"></a>
<a name="index-TRAPSASYNC"></a>
<a name="index-NOTRAPSASYNC"></a>
<a name="index-traps_002c-asynchronous"></a>
</dd>
<dt> <tt>TRAPS_ASYNC</tt></dt>
<dd><p>While waiting for a program to exit, handle signals and run traps
immediately.  Otherwise the trap is run after a child process has exited.
Note this does not affect the point at which traps are run for any case
other than when the shell is waiting for a child process.
</p>
</dd>
</dl>


<hr size="6">
<a name="Shell-State"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#Shell-Emulation" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#Zle" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#Options" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#Description-of-Options" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="Shell-Builtin-Commands.html#Shell-Builtin-Commands" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="zsh.html#Top" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="zsh_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="Concept-Index.html#Concept-Index" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="zsh_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h3 class="subsection">16.2.11 Shell State</h3>
<dl compact="compact">
<dd><a name="index-INTERACTIVE"></a>
<a name="index-NO_005fINTERACTIVE"></a>
<a name="index-NOINTERACTIVE"></a>
</dd>
<dt> <tt>INTERACTIVE</tt> (<tt>-i</tt>, ksh: <tt>-i</tt>)</dt>
<dd><p>This is an interactive shell.  This option is set upon initialisation if
the standard input is a tty and commands are being read from standard input.
(See the discussion of <tt>SHIN_STDIN</tt>.)
This heuristic may be overridden by specifying a state for this option
on the command line.
The value of this option can only be changed via flags supplied at
invocation of the shell.
It cannot be changed once zsh is running.
</p>
<a name="index-LOGIN"></a>
<a name="index-NO_005fLOGIN"></a>
<a name="index-NOLOGIN"></a>
</dd>
<dt> <tt>LOGIN</tt> (<tt>-l</tt>, ksh: <tt>-l</tt>)</dt>
<dd><p>This is a login shell.
If this option is not explicitly set, the shell becomes a login shell if
the first character of the <tt>argv[0]</tt> passed to the shell is a &lsquo;<tt>-</tt>&rsquo;.
</p>
<a name="index-PRIVILEGED"></a>
<a name="index-NO_005fPRIVILEGED"></a>
<a name="index-NOPRIVILEGED"></a>
<a name="index-privileged-mode"></a>
<a name="index-mode_002c-privileged"></a>
</dd>
<dt> <tt>PRIVILEGED</tt> (<tt>-p</tt>, ksh: <tt>-p</tt>)</dt>
<dd><p>Turn on privileged mode. This is enabled automatically on startup if the
effective user (group) ID is not equal to the real user (group) ID.  Turning
this option off causes the effective user and group IDs to be set to the
real user and group IDs. This option disables sourcing user startup files.
If zsh is invoked as &lsquo;<tt>sh</tt>&rsquo; or &lsquo;<tt>ksh</tt>&rsquo; with this option set,
<tt>/etc/suid_profile</tt> is sourced (after <tt>/etc/profile</tt> on interactive
shells). Sourcing <tt>~/.profile</tt> is disabled and the contents of the
<tt>ENV</tt> variable is ignored. This option cannot be changed using the
<tt>-m</tt> option of <tt>setopt</tt> and <tt>unsetopt</tt>, and changing it inside a
function always changes it globally regardless of the <tt>LOCAL_OPTIONS</tt>
option.
</p>
<a name="index-RESTRICTED-1"></a>
<a name="index-NO_005fRESTRICTED"></a>
<a name="index-NORESTRICTED"></a>
<a name="index-restricted-shell-1"></a>
</dd>
<dt> <tt>RESTRICTED</tt> (<tt>-r</tt>)</dt>
<dd><p>Enables restricted mode.  This option cannot be changed using
<tt>unsetopt</tt>, and setting it inside a function always changes it
globally regardless of the <tt>LOCAL_OPTIONS</tt> option.  See
<a href="Invocation.html#Restricted-Shell">Restricted Shell</a>.
</p>
<a name="index-SHIN_005fSTDIN"></a>
<a name="index-NO_005fSHIN_005fSTDIN"></a>
<a name="index-SHINSTDIN"></a>
<a name="index-NOSHINSTDIN"></a>
</dd>
<dt> <tt>SHIN_STDIN</tt> (<tt>-s</tt>, ksh: <tt>-s</tt>)</dt>
<dd><p>Commands are being read from the standard input.
Commands are read from standard input if no command is specified with
<tt>-c</tt> and no file of commands is specified.  If <tt>SHIN_STDIN</tt>
is set explicitly on the command line,
any argument that would otherwise have been
taken as a file to run will instead be treated as a normal positional
parameter.
Note that setting or unsetting this option on the command line does not
necessarily affect the state the option will have while the shell is
running - that is purely an indicator of whether on not commands are
<em>actually</em> being read from standard input.
The value of this option can only be changed via flags supplied at
invocation of the shell.
It cannot be changed once zsh is running.
</p>
<a name="index-SINGLE_005fCOMMAND"></a>
<a name="index-NO_005fSINGLE_005fCOMMAND"></a>
<a name="index-SINGLECOMMAND"></a>
<a name="index-NOSINGLECOMMAND"></a>
<a name="index-single-command"></a>
<a name="index-INTERACTIVE_002c-use-of"></a>
</dd>
<dt> <tt>SINGLE_COMMAND</tt> (<tt>-t</tt>, ksh: <tt>-t</tt>)</dt>
<dd><p>If the shell is reading from standard input, it exits after a single command
has been executed.  This also makes the shell non-interactive, unless the
<tt>INTERACTIVE</tt> option is explicitly set on the command line.
The value of this option can only be changed via flags supplied at
invocation of the shell.
It cannot be changed once zsh is running.
</p>
</dd>
</dl>


<hr size="6">
<a name="Zle"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#Shell-State" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#Option-Aliases" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#Options" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#Description-of-Options" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="Shell-Builtin-Commands.html#Shell-Builtin-Commands" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="zsh.html#Top" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="zsh_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="Concept-Index.html#Concept-Index" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="zsh_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h3 class="subsection">16.2.12 Zle</h3>
<dl compact="compact">
<dd><a name="index-BEEP"></a>
<a name="index-NO_005fBEEP"></a>
<a name="index-NOBEEP"></a>
<a name="index-beep_002c-enabling"></a>
<a name="index-enabling-the-beep"></a>
</dd>
<dt> <tt>BEEP</tt> (<tt>+B</tt>) &lt;D&gt;</dt>
<dd><p>Beep on error in ZLE.
</p>
<a name="index-COMBINING_005fCHARS"></a>
<a name="index-NO_005fCOMBINING_005fCHARS"></a>
<a name="index-COMBININGCHARS"></a>
<a name="index-NOCOMBININGCHARS"></a>
<a name="index-characters_002c-_0028Unicode_0029-combining"></a>
<a name="index-combining-characters-_0028Unicode_0029"></a>
<a name="index-Unicode-combining-characters"></a>
</dd>
<dt> <tt>COMBINING_CHARS</tt></dt>
<dd><p>Assume that the terminal displays combining characters correctly.
Specifically, if a base alphanumeric character is followed by one or more
zero-width punctuation characters, assume that the zero-width characters
will be displayed as modifications to the base character within the
same width.  Not all terminals handle this.  If this option is not
set, zero-width characters are displayed separately with special
mark-up.
</p>
<p>If this option is set, the pattern test <tt>[[:WORD:]]</tt> matches a
zero-width punctuation character on the assumption that it will be
used as part of a word in combination with a word character.
Otherwise the base shell does not handle combining characters specially.
</p>
<a name="index-EMACS"></a>
<a name="index-NO_005fEMACS"></a>
<a name="index-NOEMACS"></a>
</dd>
<dt> <tt>EMACS</tt></dt>
<dd><p>If ZLE is loaded, turning on this option has the equivalent effect
of &lsquo;<tt>bindkey -e</tt>&rsquo;.  In addition, the VI option is unset.
Turning it off has no effect.  The option setting is
not guaranteed to reflect the current keymap.  This option is
provided for compatibility; <tt>bindkey</tt> is the recommended interface.
</p>
<a name="index-OVERSTRIKE"></a>
<a name="index-NO_005fOVERSTRIKE"></a>
<a name="index-NOOVERSTRIKE"></a>
<a name="index-editor_002c-overstrike-mode"></a>
<a name="index-overstrike-mode_002c-of-editor"></a>
</dd>
<dt> <tt>OVERSTRIKE</tt></dt>
<dd><p>Start up the line editor in overstrike mode.
</p>
<a name="index-SINGLE_005fLINE_005fZLE"></a>
<a name="index-NO_005fSINGLE_005fLINE_005fZLE"></a>
<a name="index-SINGLELINEZLE"></a>
<a name="index-NOSINGLELINEZLE"></a>
<a name="index-editor_002c-single-line-mode"></a>
</dd>
<dt> <tt>SINGLE_LINE_ZLE</tt> (<tt>-M</tt>) &lt;K&gt;</dt>
<dd><p>Use single-line command line editing instead of multi-line.
</p>
<p>Note that although this is on by default in ksh emulation it only
provides superficial compatibility with the ksh line editor and
reduces the effectiveness of the zsh line editor.  As it has no
effect on shell syntax, many users may wish to disable this option
when using ksh emulation interactively.
</p>
<a name="index-VI"></a>
<a name="index-NO_005fVI"></a>
<a name="index-NOVI"></a>
</dd>
<dt> <tt>VI</tt></dt>
<dd><p>If ZLE is loaded, turning on this option has the equivalent effect
of &lsquo;<tt>bindkey -v</tt>&rsquo;.  In addition, the EMACS option is unset.
Turning it off has no effect.  The option setting is
not guaranteed to reflect the current keymap.  This option is
provided for compatibility; <tt>bindkey</tt> is the recommended interface.
</p>
<a name="index-ZLE"></a>
<a name="index-NO_005fZLE"></a>
<a name="index-NOZLE"></a>
<a name="index-editor_002c-enabling"></a>
<a name="index-enabling-the-editor"></a>
</dd>
<dt> <tt>ZLE</tt> (<tt>-Z</tt>)</dt>
<dd><p>Use the zsh line editor.  Set by default in interactive shells connected to
a terminal.
</p>
</dd>
</dl>

<hr size="6">
<a name="Option-Aliases"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#Zle" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#Single-Letter-Options" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#Options" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#Options" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="Shell-Builtin-Commands.html#Shell-Builtin-Commands" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="zsh.html#Top" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="zsh_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="Concept-Index.html#Concept-Index" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="zsh_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>

<a name="Option-Aliases-1"></a>
<h2 class="section">16.3 Option Aliases</h2>
<a name="index-options_002c-aliases"></a>
<p>Some options have alternative names.  These aliases are never used for
output, but can be used just like normal option names when specifying
options to the shell.
</p>
<dl compact="compact">
<dd><a name="index-BRACE_005fEXPAND"></a>
<a name="index-NO_005fBRACE_005fEXPAND"></a>
<a name="index-BRACEEXPAND"></a>
<a name="index-NOBRACEEXPAND"></a>
</dd>
<dt> <tt>BRACE_EXPAND</tt></dt>
<dd><p><em>NO_</em><tt>IGNORE_BRACES</tt>
(ksh and bash compatibility)
</p>
<a name="index-DOT_005fGLOB"></a>
<a name="index-NO_005fDOT_005fGLOB"></a>
<a name="index-DOTGLOB"></a>
<a name="index-NODOTGLOB"></a>
</dd>
<dt> <tt>DOT_GLOB</tt></dt>
<dd><p><tt>GLOB_DOTS</tt>
(bash compatibility)
</p>
<a name="index-HASH_005fALL"></a>
<a name="index-NO_005fHASH_005fALL"></a>
<a name="index-HASHALL"></a>
<a name="index-NOHASHALL"></a>
</dd>
<dt> <tt>HASH_ALL</tt></dt>
<dd><p><tt>HASH_CMDS</tt>
(bash compatibility)
</p>
<a name="index-HIST_005fAPPEND"></a>
<a name="index-NO_005fHIST_005fAPPEND"></a>
<a name="index-HISTAPPEND"></a>
<a name="index-NOHISTAPPEND"></a>
</dd>
<dt> <tt>HIST_APPEND</tt></dt>
<dd><p><tt>APPEND_HISTORY</tt>
(bash compatibility)
</p>
<a name="index-HIST_005fEXPAND"></a>
<a name="index-NO_005fHIST_005fEXPAND"></a>
<a name="index-HISTEXPAND"></a>
<a name="index-NOHISTEXPAND"></a>
</dd>
<dt> <tt>HIST_EXPAND</tt></dt>
<dd><p><tt>BANG_HIST</tt>
(bash compatibility)
</p>
<a name="index-LOG"></a>
<a name="index-NO_005fLOG"></a>
<a name="index-NOLOG"></a>
</dd>
<dt> <tt>LOG</tt></dt>
<dd><p><em>NO_</em><tt>HIST_NO_FUNCTIONS</tt>
(ksh compatibility)
</p>
<a name="index-MAIL_005fWARN"></a>
<a name="index-NO_005fMAIL_005fWARN"></a>
<a name="index-MAILWARN"></a>
<a name="index-NOMAILWARN"></a>
</dd>
<dt> <tt>MAIL_WARN</tt></dt>
<dd><p><tt>MAIL_WARNING</tt>
(bash compatibility)
</p>
<a name="index-ONE_005fCMD"></a>
<a name="index-NO_005fONE_005fCMD"></a>
<a name="index-ONECMD"></a>
<a name="index-NOONECMD"></a>
</dd>
<dt> <tt>ONE_CMD</tt></dt>
<dd><p><tt>SINGLE_COMMAND</tt>
(bash compatibility)
</p>
<a name="index-PHYSICAL"></a>
<a name="index-NO_005fPHYSICAL"></a>
<a name="index-NOPHYSICAL"></a>
</dd>
<dt> <tt>PHYSICAL</tt></dt>
<dd><p><tt>CHASE_LINKS</tt>
(ksh and bash compatibility)
</p>
<a name="index-PROMPT_005fVARS"></a>
<a name="index-NO_005fPROMPT_005fVARS"></a>
<a name="index-PROMPTVARS"></a>
<a name="index-NOPROMPTVARS"></a>
</dd>
<dt> <tt>PROMPT_VARS</tt></dt>
<dd><p><tt>PROMPT_SUBST</tt>
(bash compatibility)
</p>
<a name="index-STDIN"></a>
<a name="index-NO_005fSTDIN"></a>
<a name="index-NOSTDIN"></a>
</dd>
<dt> <tt>STDIN</tt></dt>
<dd><p><tt>SHIN_STDIN</tt>
(ksh compatibility)
</p>
<a name="index-TRACK_005fALL"></a>
<a name="index-NO_005fTRACK_005fALL"></a>
<a name="index-TRACKALL"></a>
<a name="index-NOTRACKALL"></a>
</dd>
<dt> <tt>TRACK_ALL</tt></dt>
<dd><p><tt>HASH_CMDS</tt>
(ksh compatibility)
</p>
</dd>
</dl>
<hr size="6">
<a name="Single-Letter-Options"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#Option-Aliases" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#Default-set" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#Options" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#Options" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="Shell-Builtin-Commands.html#Shell-Builtin-Commands" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="zsh.html#Top" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="zsh_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="Concept-Index.html#Concept-Index" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="zsh_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>

<a name="Single-Letter-Options-1"></a>
<h2 class="section">16.4 Single Letter Options</h2>
<a name="index-options_002c-single-letter"></a>
<a name="index-single-letter-options"></a>

<hr size="6">
<a name="Default-set"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#Single-Letter-Options" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#sh_002fksh-emulation-set" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#Options" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#Single-Letter-Options" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="Shell-Builtin-Commands.html#Shell-Builtin-Commands" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="zsh.html#Top" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="zsh_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="Concept-Index.html#Concept-Index" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="zsh_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h3 class="subsection">16.4.1 Default set</h3>
<dl compact="compact">
<dt> <tt>-0</tt></dt>
<dd><p>CORRECT
</p></dd>
<dt> <tt>-1</tt></dt>
<dd><p>PRINT_EXIT_VALUE
</p></dd>
<dt> <tt>-2</tt></dt>
<dd><p><em>NO_</em>BAD_PATTERN
</p></dd>
<dt> <tt>-3</tt></dt>
<dd><p><em>NO_</em>NOMATCH
</p></dd>
<dt> <tt>-4</tt></dt>
<dd><p>GLOB_DOTS
</p></dd>
<dt> <tt>-5</tt></dt>
<dd><p>NOTIFY
</p></dd>
<dt> <tt>-6</tt></dt>
<dd><p>BG_NICE
</p></dd>
<dt> <tt>-7</tt></dt>
<dd><p>IGNORE_EOF
</p></dd>
<dt> <tt>-8</tt></dt>
<dd><p>MARK_DIRS
</p></dd>
<dt> <tt>-9</tt></dt>
<dd><p>AUTO_LIST
</p></dd>
<dt> <tt>-B</tt></dt>
<dd><p><em>NO_</em>BEEP
</p></dd>
<dt> <tt>-C</tt></dt>
<dd><p><em>NO_</em>CLOBBER
</p></dd>
<dt> <tt>-D</tt></dt>
<dd><p>PUSHD_TO_HOME
</p></dd>
<dt> <tt>-E</tt></dt>
<dd><p>PUSHD_SILENT
</p></dd>
<dt> <tt>-F</tt></dt>
<dd><p><em>NO_</em>GLOB
</p></dd>
<dt> <tt>-G</tt></dt>
<dd><p>NULL_GLOB
</p></dd>
<dt> <tt>-H</tt></dt>
<dd><p>RM_STAR_SILENT
</p></dd>
<dt> <tt>-I</tt></dt>
<dd><p>IGNORE_BRACES
</p></dd>
<dt> <tt>-J</tt></dt>
<dd><p>AUTO_CD
</p></dd>
<dt> <tt>-K</tt></dt>
<dd><p><em>NO_</em>BANG_HIST
</p></dd>
<dt> <tt>-L</tt></dt>
<dd><p>SUN_KEYBOARD_HACK
</p></dd>
<dt> <tt>-M</tt></dt>
<dd><p>SINGLE_LINE_ZLE
</p></dd>
<dt> <tt>-N</tt></dt>
<dd><p>AUTO_PUSHD
</p></dd>
<dt> <tt>-O</tt></dt>
<dd><p>CORRECT_ALL
</p></dd>
<dt> <tt>-P</tt></dt>
<dd><p>RC_EXPAND_PARAM
</p></dd>
<dt> <tt>-Q</tt></dt>
<dd><p>PATH_DIRS
</p></dd>
<dt> <tt>-R</tt></dt>
<dd><p>LONG_LIST_JOBS
</p></dd>
<dt> <tt>-S</tt></dt>
<dd><p>REC_EXACT
</p></dd>
<dt> <tt>-T</tt></dt>
<dd><p>CDABLE_VARS
</p></dd>
<dt> <tt>-U</tt></dt>
<dd><p>MAIL_WARNING
</p></dd>
<dt> <tt>-V</tt></dt>
<dd><p><em>NO_</em>PROMPT_CR
</p></dd>
<dt> <tt>-W</tt></dt>
<dd><p>AUTO_RESUME
</p></dd>
<dt> <tt>-X</tt></dt>
<dd><p>LIST_TYPES
</p></dd>
<dt> <tt>-Y</tt></dt>
<dd><p>MENU_COMPLETE
</p></dd>
<dt> <tt>-Z</tt></dt>
<dd><p>ZLE
</p></dd>
<dt> <tt>-a</tt></dt>
<dd><p>ALL_EXPORT
</p></dd>
<dt> <tt>-e</tt></dt>
<dd><p>ERR_EXIT
</p></dd>
<dt> <tt>-f</tt></dt>
<dd><p><em>NO_</em>RCS
</p></dd>
<dt> <tt>-g</tt></dt>
<dd><p>HIST_IGNORE_SPACE
</p></dd>
<dt> <tt>-h</tt></dt>
<dd><p>HIST_IGNORE_DUPS
</p></dd>
<dt> <tt>-i</tt></dt>
<dd><p>INTERACTIVE
</p></dd>
<dt> <tt>-k</tt></dt>
<dd><p>INTERACTIVE_COMMENTS
</p></dd>
<dt> <tt>-l</tt></dt>
<dd><p>LOGIN
</p></dd>
<dt> <tt>-m</tt></dt>
<dd><p>MONITOR
</p></dd>
<dt> <tt>-n</tt></dt>
<dd><p><em>NO_</em>EXEC
</p></dd>
<dt> <tt>-p</tt></dt>
<dd><p>PRIVILEGED
</p></dd>
<dt> <tt>-r</tt></dt>
<dd><p>RESTRICTED
</p></dd>
<dt> <tt>-s</tt></dt>
<dd><p>SHIN_STDIN
</p></dd>
<dt> <tt>-t</tt></dt>
<dd><p>SINGLE_COMMAND
</p></dd>
<dt> <tt>-u</tt></dt>
<dd><p><em>NO_</em>UNSET
</p></dd>
<dt> <tt>-v</tt></dt>
<dd><p>VERBOSE
</p></dd>
<dt> <tt>-w</tt></dt>
<dd><p>CHASE_LINKS
</p></dd>
<dt> <tt>-x</tt></dt>
<dd><p>XTRACE
</p></dd>
<dt> <tt>-y</tt></dt>
<dd><p>SH_WORD_SPLIT
</p></dd>
</dl>

<hr size="6">
<a name="sh_002fksh-emulation-set"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#Default-set" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="#Also-note" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#Options" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#Single-Letter-Options" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="Shell-Builtin-Commands.html#Shell-Builtin-Commands" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="zsh.html#Top" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="zsh_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="Concept-Index.html#Concept-Index" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="zsh_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h3 class="subsection">16.4.2 sh/ksh emulation set</h3>
<dl compact="compact">
<dt> <tt>-C</tt></dt>
<dd><p><em>NO_</em>CLOBBER
</p></dd>
<dt> <tt>-T</tt></dt>
<dd><p>TRAPS_ASYNC
</p></dd>
<dt> <tt>-X</tt></dt>
<dd><p>MARK_DIRS
</p></dd>
<dt> <tt>-a</tt></dt>
<dd><p>ALL_EXPORT
</p></dd>
<dt> <tt>-b</tt></dt>
<dd><p>NOTIFY
</p></dd>
<dt> <tt>-e</tt></dt>
<dd><p>ERR_EXIT
</p></dd>
<dt> <tt>-f</tt></dt>
<dd><p><em>NO_</em>GLOB
</p></dd>
<dt> <tt>-i</tt></dt>
<dd><p>INTERACTIVE
</p></dd>
<dt> <tt>-l</tt></dt>
<dd><p>LOGIN
</p></dd>
<dt> <tt>-m</tt></dt>
<dd><p>MONITOR
</p></dd>
<dt> <tt>-n</tt></dt>
<dd><p><em>NO_</em>EXEC
</p></dd>
<dt> <tt>-p</tt></dt>
<dd><p>PRIVILEGED
</p></dd>
<dt> <tt>-r</tt></dt>
<dd><p>RESTRICTED
</p></dd>
<dt> <tt>-s</tt></dt>
<dd><p>SHIN_STDIN
</p></dd>
<dt> <tt>-t</tt></dt>
<dd><p>SINGLE_COMMAND
</p></dd>
<dt> <tt>-u</tt></dt>
<dd><p><em>NO_</em>UNSET
</p></dd>
<dt> <tt>-v</tt></dt>
<dd><p>VERBOSE
</p></dd>
<dt> <tt>-x</tt></dt>
<dd><p>XTRACE
</p></dd>
</dl>

<hr size="6">
<a name="Also-note"></a>
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#sh_002fksh-emulation-set" title="Previous section in reading order"> &lt; </a>]</td>
<td valign="middle" align="left">[<a href="Shell-Builtin-Commands.html#Shell-Builtin-Commands" title="Next section in reading order"> &gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="#Options" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="#Single-Letter-Options" title="Up section"> Up </a>]</td>
<td valign="middle" align="left">[<a href="Shell-Builtin-Commands.html#Shell-Builtin-Commands" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="zsh.html#Top" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="zsh_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="Concept-Index.html#Concept-Index" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="zsh_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<h3 class="subsection">16.4.3 Also note</h3>
<dl compact="compact">
<dt> <tt>-A</tt></dt>
<dd><p>Used by <tt>set</tt> for setting arrays
</p></dd>
<dt> <tt>-b</tt></dt>
<dd><p>Used on the command line to specify end of option processing
</p></dd>
<dt> <tt>-c</tt></dt>
<dd><p>Used on the command line to specify a single command
</p></dd>
<dt> <tt>-m</tt></dt>
<dd><p>Used by <tt>setopt</tt> for pattern-matching option setting
</p></dd>
<dt> <tt>-o</tt></dt>
<dd><p>Used in all places to allow use of long option names
</p></dd>
<dt> <tt>-s</tt></dt>
<dd><p>Used by <tt>set</tt> to sort positional parameters
</p></dd>
</dl>
<hr size="6">
<table cellpadding="1" cellspacing="1" border="0">
<tr><td valign="middle" align="left">[<a href="#Options" title="Beginning of this chapter or previous chapter"> &lt;&lt; </a>]</td>
<td valign="middle" align="left">[<a href="Shell-Builtin-Commands.html#Shell-Builtin-Commands" title="Next chapter"> &gt;&gt; </a>]</td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left"> &nbsp; </td>
<td valign="middle" align="left">[<a href="zsh.html#Top" title="Cover (top) of document">Top</a>]</td>
<td valign="middle" align="left">[<a href="zsh_toc.html#SEC_Contents" title="Table of contents">Contents</a>]</td>
<td valign="middle" align="left">[<a href="Concept-Index.html#Concept-Index" title="Index">Index</a>]</td>
<td valign="middle" align="left">[<a href="zsh_abt.html#SEC_About" title="About (help)"> ? </a>]</td>
</tr></table>
<p>
 <font size="-1">
  This document was generated by <em>Peter Stephenson</em> on <em>December 21, 2012</em> using <a href="http://www.nongnu.org/texi2html/"><em>texi2html 1.82</em></a>.
 </font>
 <br>

</p>
</body>
</html>