/usr/share/doc/opt/examples/testopt.c is in opt 3.19-1.2.
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 | /* OPT v3.19: options parsing tool */
/*
* This SOFTWARE has been authored by an employee of the University of
* California, operator of the Los Alamos National Laboratory under
* Contract No. W-7405-ENG-36 with the U.S. Department of Energy. The
* U.S. Government has rights to use, reproduce, and distribute this
* SOFTWARE. Neither the Government nor the University makes any
* warranty, express or implied, or assumes any liability or
* responsibility for the use of this SOFTWARE. If SOFTWARE is modified
* to produce derivative works, such modified SOFTWARE should be clearly
* marked, so as not to confuse it with the version available from LANL.
*
* Additionally, this program is free software; you can distribute it
* and/or modify it under the terms of the GNU General Public License as
* published by the Free Software Foundation; either version 2 of the
* License, or any later version. Accordingly, this program is
* distributed in the hope that it will be useful, but WITHOUT A
* WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
* for more details (http://www.gnu.org/copyleft/gpl.txt).
*
*
* The OPT package is available from
* http://nis-www.lanl.gov/~jt/Software
*/
/* testopt.c */
#include <stdio.h>
#include <stdlib.h>
#include <opt.h>
int month=4;
int day=24;
int year=1993;
int julian=0;
char *who=NULL;
int altversion=99;
int go(int argc, char **argv)
{
if (argc>1) {
printf("In program %s, Extra option: %s\n",argv[0],argv[1]);
}
if (optinvoked(&month)) {
printf("User set month...\n");
}
if (month == 9 && day == 11 && year == 1989) {
printf("Happy birthday, Max\n");
} else {
printf("Hello, %s: %4d/%02d/%02d %s\n",(who==NULL ? "world" : who),
year,month,day,(julian ? "(Julian)" : ""));
}
return OPT_OK;
}
int checkyear(void *v)
{
if (year == 2000) {
printf("Watch out for that year=2000 bug!\n");
return OPT_ERROR;
}
return OPT_OK;
}
int quit()
{
printf("Bye...\n");
return OPT_OK;
}
int write_altversion(void *v)
{
/* not sure what the void *v argument would be used for... */
printf("Version %d\n",altversion);
optExitNumber(12);
return OPT_QUIT;
}
int fix_mon(void *v)
{
int m;
/* fix whatever int variable v is pointing to */
m = *((int *)v);
if (m < 1 || m > 12)
m=1;
*((int *)v) = m;
return OPT_OK;
}
int
main(int argc, char **argv)
{
optreg(&month,OPT_INT,'m',"Month");
optlongname(&month,"month");
opthook(&month,fix_mon);
optrega(&day,OPT_INT,'d',"day","Day");
opthelp(&day,"Use day of month, should be less than 32");
optreg_INT(&year,'y',"Year...");
optreg(&year,OPT_INT,'Y',"Year");
optdescript(&year,"What Year");
opthook(&year,checkyear);
optregs(&julian,OPT_BOOL,"julian");
optregp(&who,OPT_STRING,"who","Who to say hello to");
/* This is one way to write a version... */
optexec("altversion",write_altversion,"Write altversion number and exit");
/* But opt also has a builtin --version that writes string and exits */
optVersion("3.14159+");
optEnvVarName( "OPT" );
optDefaultFile( "testoptrc" ); /* in practice, you do ~/.testoptrc */
optMain(go);
optQuit(quit);
opt(&argc,&argv);
go(argc,argv);
opt_free();
return 0;
}
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