/usr/share/htslib-test/bgzip.c is in htslib-test 1.3.2-2.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 | /* bgzip.c -- Block compression/decompression utility.
Copyright (C) 2008, 2009 Broad Institute / Massachusetts Institute of Technology
Copyright (C) 2010, 2013-2016 Genome Research Ltd.
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notices and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
*/
#include <config.h>
#include <stdlib.h>
#include <string.h>
#include <stdio.h>
#include <fcntl.h>
#include <unistd.h>
#include <errno.h>
#include <stdarg.h>
#include <getopt.h>
#include <sys/stat.h>
#include "htslib/bgzf.h"
#include "htslib/hts.h"
static const int WINDOW_SIZE = 64 * 1024;
static void error(const char *format, ...)
{
va_list ap;
va_start(ap, format);
vfprintf(stderr, format, ap);
va_end(ap);
exit(EXIT_FAILURE);
}
static int confirm_overwrite(const char *fn)
{
int save_errno = errno;
int ret = 0;
if (isatty(STDIN_FILENO)) {
char c;
fprintf(stderr, "[bgzip] %s already exists; do you wish to overwrite (y or n)? ", fn);
if (scanf("%c", &c) == 1 && (c == 'Y' || c == 'y')) ret = 1;
}
errno = save_errno;
return ret;
}
static int bgzip_main_usage(void)
{
fprintf(stderr, "\n");
fprintf(stderr, "Version: %s\n", hts_version());
fprintf(stderr, "Usage: bgzip [OPTIONS] [FILE] ...\n");
fprintf(stderr, "Options:\n");
fprintf(stderr, " -b, --offset INT decompress at virtual file pointer (0-based uncompressed offset)\n");
fprintf(stderr, " -c, --stdout write on standard output, keep original files unchanged\n");
fprintf(stderr, " -d, --decompress decompress\n");
fprintf(stderr, " -f, --force overwrite files without asking\n");
fprintf(stderr, " -h, --help give this help\n");
fprintf(stderr, " -i, --index compress and create BGZF index\n");
fprintf(stderr, " -I, --index-name FILE name of BGZF index file [file.gz.gzi]\n");
fprintf(stderr, " -r, --reindex (re)index compressed file\n");
fprintf(stderr, " -s, --size INT decompress INT bytes (uncompressed size)\n");
fprintf(stderr, " -@, --threads INT number of compression threads to use [1]\n");
fprintf(stderr, "\n");
return 1;
}
int main(int argc, char **argv)
{
int c, compress, pstdout, is_forced, index = 0, reindex = 0;
BGZF *fp;
void *buffer;
long start, end, size;
char *index_fname = NULL;
int threads = 1;
static const struct option loptions[] =
{
{"help", no_argument, NULL, 'h'},
{"offset", required_argument, NULL, 'b'},
{"stdout", no_argument, NULL, 'c'},
{"decompress", no_argument, NULL, 'd'},
{"force", no_argument, NULL, 'f'},
{"index", no_argument, NULL, 'i'},
{"index-name", required_argument, NULL, 'I'},
{"reindex", no_argument, NULL, 'r'},
{"size", required_argument, NULL, 's'},
{"threads", required_argument, NULL, '@'},
{"version", no_argument, NULL, 1},
{NULL, 0, NULL, 0}
};
compress = 1; pstdout = 0; start = 0; size = -1; end = -1; is_forced = 0;
while((c = getopt_long(argc, argv, "cdh?fb:@:s:iI:r",loptions,NULL)) >= 0){
switch(c){
case 'd': compress = 0; break;
case 'c': pstdout = 1; break;
case 'b': start = atol(optarg); compress = 0; pstdout = 1; break;
case 's': size = atol(optarg); pstdout = 1; break;
case 'f': is_forced = 1; break;
case 'i': index = 1; break;
case 'I': index_fname = optarg; break;
case 'r': reindex = 1; compress = 0; break;
case '@': threads = atoi(optarg); break;
case 1:
printf(
"bgzip (htslib) %s\n"
"Copyright (C) 2016 Genome Research Ltd.\n", hts_version());
return EXIT_SUCCESS;
case 'h':
case '?': return bgzip_main_usage();
}
}
if (size >= 0) end = start + size;
if (end >= 0 && end < start) {
fprintf(stderr, "[bgzip] Illegal region: [%ld, %ld]\n", start, end);
return 1;
}
if (compress == 1) {
struct stat sbuf;
int f_src = fileno(stdin);
if ( argc>optind )
{
if ( stat(argv[optind],&sbuf)<0 )
{
fprintf(stderr, "[bgzip] %s: %s\n", strerror(errno), argv[optind]);
return 1;
}
if ((f_src = open(argv[optind], O_RDONLY)) < 0) {
fprintf(stderr, "[bgzip] %s: %s\n", strerror(errno), argv[optind]);
return 1;
}
if (pstdout)
fp = bgzf_open("-", "w");
else
{
char *name = malloc(strlen(argv[optind]) + 5);
strcpy(name, argv[optind]);
strcat(name, ".gz");
fp = bgzf_open(name, is_forced? "w" : "wx");
if (fp == NULL && errno == EEXIST && confirm_overwrite(name))
fp = bgzf_open(name, "w");
if (fp == NULL) {
fprintf(stderr, "[bgzip] can't create %s: %s\n", name, strerror(errno));
free(name);
return 1;
}
free(name);
}
}
else if (!pstdout && isatty(fileno((FILE *)stdout)) )
return bgzip_main_usage();
else if ( index && !index_fname )
{
fprintf(stderr, "[bgzip] Index file name expected when writing to stdout\n");
return 1;
}
else
fp = bgzf_open("-", "w");
if (threads > 1)
bgzf_mt(fp, threads, 256);
if ( index ) bgzf_index_build_init(fp);
buffer = malloc(WINDOW_SIZE);
while ((c = read(f_src, buffer, WINDOW_SIZE)) > 0)
if (bgzf_write(fp, buffer, c) < 0) error("Could not write %d bytes: Error %d\n", c, fp->errcode);
if ( index )
{
if (index_fname) {
if (bgzf_index_dump(fp, index_fname, NULL) < 0)
error("Could not write index to '%s'\n", index_fname);
} else {
if (bgzf_index_dump(fp, argv[optind], ".gz.gzi") < 0)
error("Could not write index to '%s.gz.gzi'", argv[optind]);
}
}
if (bgzf_close(fp) < 0) error("Close failed: Error %d", fp->errcode);
if (argc > optind && !pstdout) unlink(argv[optind]);
free(buffer);
close(f_src);
return 0;
}
else if ( reindex )
{
if ( argc>optind )
{
fp = bgzf_open(argv[optind], "r");
if ( !fp ) error("[bgzip] Could not open file: %s\n", argv[optind]);
}
else
{
if ( !index_fname ) error("[bgzip] Index file name expected when reading from stdin\n");
fp = bgzf_open("-", "r");
if ( !fp ) error("[bgzip] Could not read from stdin: %s\n", strerror(errno));
}
buffer = malloc(BGZF_BLOCK_SIZE);
bgzf_index_build_init(fp);
int ret;
while ( (ret=bgzf_read(fp, buffer, BGZF_BLOCK_SIZE))>0 ) ;
free(buffer);
if ( ret<0 ) error("Is the file gzipped or bgzipped? The latter is required for indexing.\n");
if ( index_fname ) {
if (bgzf_index_dump(fp, index_fname, NULL) < 0)
error("Could not write index to '%s'\n", index_fname);
} else {
if (bgzf_index_dump(fp, argv[optind], ".gzi") < 0)
error("Could not write index to '%s.gzi'\n", argv[optind]);
}
if ( bgzf_close(fp)<0 ) error("Close failed: Error %d\n",fp->errcode);
return 0;
}
else
{
struct stat sbuf;
int f_dst;
if ( argc>optind )
{
if ( stat(argv[optind],&sbuf)<0 )
{
fprintf(stderr, "[bgzip] %s: %s\n", strerror(errno), argv[optind]);
return 1;
}
char *name;
int len = strlen(argv[optind]);
if ( strcmp(argv[optind]+len-3,".gz") )
{
fprintf(stderr, "[bgzip] %s: unknown suffix -- ignored\n", argv[optind]);
return 1;
}
fp = bgzf_open(argv[optind], "r");
if (fp == NULL) {
fprintf(stderr, "[bgzip] Could not open file: %s\n", argv[optind]);
return 1;
}
if (pstdout) {
f_dst = fileno(stdout);
}
else {
const int wrflags = O_WRONLY | O_CREAT | O_TRUNC;
name = strdup(argv[optind]);
name[strlen(name) - 3] = '\0';
f_dst = open(name, is_forced? wrflags : wrflags|O_EXCL, 0666);
if (f_dst < 0 && errno == EEXIST && confirm_overwrite(name))
f_dst = open(name, wrflags, 0666);
if (f_dst < 0) {
fprintf(stderr, "[bgzip] can't create %s: %s\n", name, strerror(errno));
free(name);
return 1;
}
free(name);
}
}
else if (!pstdout && isatty(fileno((FILE *)stdin)) )
return bgzip_main_usage();
else
{
f_dst = fileno(stdout);
fp = bgzf_open("-", "r");
if (fp == NULL) {
fprintf(stderr, "[bgzip] Could not read from stdin: %s\n", strerror(errno));
return 1;
}
}
buffer = malloc(WINDOW_SIZE);
if ( start>0 )
{
if ( bgzf_index_load(fp, argv[optind], ".gzi") < 0 ) error("Could not load index: %s.gzi\n", argv[optind]);
if ( bgzf_useek(fp, start, SEEK_SET) < 0 ) error("Could not seek to %d-th (uncompressd) byte\n", start);
}
while (1) {
if (end < 0) c = bgzf_read(fp, buffer, WINDOW_SIZE);
else c = bgzf_read(fp, buffer, (end - start > WINDOW_SIZE)? WINDOW_SIZE:(end - start));
if (c == 0) break;
if (c < 0) error("Could not read %d bytes: Error %d\n", (end - start > WINDOW_SIZE)? WINDOW_SIZE:(end - start), fp->errcode);
start += c;
if ( write(f_dst, buffer, c) != c ) error("Could not write %d bytes\n", c);
if (end >= 0 && start >= end) break;
}
free(buffer);
if (bgzf_close(fp) < 0) error("Close failed: Error %d\n",fp->errcode);
if (!pstdout) unlink(argv[optind]);
return 0;
}
return 0;
}
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