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
|
/*-
* Copyright (c) 2003-2004 Tim Kientzle
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer
* in this position and unchanged.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
* IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "bsdtar_platform.h"
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/stat.h>
#include <archive.h>
#include <archive_entry.h>
#include <dirent.h>
#include <errno.h>
#include <fcntl.h>
#include <fnmatch.h>
#ifdef HAVE_GETOPT_LONG
#include <getopt.h>
#else
struct option {
const char *name;
int has_arg;
int *flag;
int val;
};
#define no_argument 0
#define required_argument 1
#endif
#ifdef HAVE_NL_LANGINFO_D_MD_ORDER
#include <langinfo.h>
#endif
#include <locale.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include "bsdtar.h"
static int bsdtar_getopt(struct bsdtar *, const char *optstring,
const struct option **poption);
static void long_help(struct bsdtar *);
static void only_mode(struct bsdtar *, char mode, const char *opt,
const char *valid);
static char ** rewrite_argv(struct bsdtar *,
int *argc, char ** src_argv,
const char *optstring);
/*
* The leading '+' here forces the GNU version of getopt() (as well as
* both the GNU and BSD versions of getopt_long) to stop at the first
* non-option. Otherwise, GNU getopt() permutes the arguments and
* screws up -C processing.
*/
const char *tar_opts = "+Bb:C:cF:f:HhjkLlmnOoPprtT:UuvW:wX:xyZz";
/*
* Most of these long options are deliberately not documented. They
* are provided only to make life easier for people who also use GNU tar.
* The only long options documented in the manual page are the ones
* with no corresponding short option, such as --exclude, --nodump,
* and --fast-read.
*
* On systems that lack getopt_long, long options can be specified
* using -W longopt and -W longopt=value, e.g. "-W nodump" is the same
* as "--nodump" and "-W exclude=pattern" is the same as "--exclude
* pattern". This does not rely the GNU getopt() "W;" extension, so
* should work correctly on any system with a POSIX-compliant getopt().
*/
/* Fake short equivalents for long options that otherwise lack them. */
#define OPTION_EXCLUDE 1
#define OPTION_FAST_READ 2
#define OPTION_HELP 3
#define OPTION_INCLUDE 4
#define OPTION_NODUMP 5
#define OPTION_NO_SAME_PERMISSIONS 6
#define OPTION_NULL 7
#define OPTION_ONE_FILE_SYSTEM 8
const struct option tar_longopts[] = {
{ "absolute-paths", no_argument, NULL, 'P' },
{ "append", no_argument, NULL, 'r' },
{ "block-size", required_argument, NULL, 'b' },
{ "bunzip2", no_argument, NULL, 'j' },
{ "bzip", no_argument, NULL, 'j' },
{ "bzip2", no_argument, NULL, 'j' },
{ "cd", required_argument, NULL, 'C' },
{ "confirmation", no_argument, NULL, 'w' },
{ "create", no_argument, NULL, 'c' },
{ "dereference", no_argument, NULL, 'L' },
{ "directory", required_argument, NULL, 'C' },
{ "exclude", required_argument, NULL, OPTION_EXCLUDE },
{ "exclude-from", required_argument, NULL, 'X' },
{ "extract", no_argument, NULL, 'x' },
{ "fast-read", no_argument, NULL, OPTION_FAST_READ },
{ "file", required_argument, NULL, 'f' },
{ "format", required_argument, NULL, 'F' },
{ "gunzip", no_argument, NULL, 'z' },
{ "gzip", no_argument, NULL, 'z' },
{ "help", no_argument, NULL, OPTION_HELP },
{ "include", required_argument, NULL, OPTION_INCLUDE },
{ "interactive", no_argument, NULL, 'w' },
{ "keep-old-files", no_argument, NULL, 'k' },
{ "list", no_argument, NULL, 't' },
{ "modification-time", no_argument, NULL, 'm' },
{ "nodump", no_argument, NULL, OPTION_NODUMP },
{ "norecurse", no_argument, NULL, 'n' },
{ "no-recursion", no_argument, NULL, 'n' },
{ "no-same-owner", no_argument, NULL, 'o' },
{ "no-same-permissions",no_argument, NULL, OPTION_NO_SAME_PERMISSIONS },
{ "null", no_argument, NULL, OPTION_NULL },
{ "one-file-system", no_argument, NULL, OPTION_ONE_FILE_SYSTEM },
{ "preserve-permissions", no_argument, NULL, 'p' },
{ "read-full-blocks", no_argument, NULL, 'B' },
{ "same-permissions", no_argument, NULL, 'p' },
{ "to-stdout", no_argument, NULL, 'O' },
{ "unlink", no_argument, NULL, 'U' },
{ "unlink-first", no_argument, NULL, 'U' },
{ "update", no_argument, NULL, 'u' },
{ "verbose", no_argument, NULL, 'v' },
{ NULL, 0, NULL, 0 }
};
int
main(int argc, char **argv)
{
struct bsdtar *bsdtar, bsdtar_storage;
const struct option *option;
struct passwd *pwent;
int opt;
char mode;
char possible_help_request;
char buff[16];
/*
* Use a pointer for consistency, but stack-allocated storage
* for ease of cleanup.
*/
bsdtar = &bsdtar_storage;
memset(bsdtar, 0, sizeof(*bsdtar));
bsdtar->fd = -1; /* Mark as "unused" */
if (setlocale(LC_ALL, "") == NULL)
bsdtar_warnc(bsdtar, 0, "Failed to set default locale");
#ifdef HAVE_NL_LANGINFO_D_MD_ORDER
bsdtar->day_first = (*nl_langinfo(D_MD_ORDER) == 'd');
#endif
mode = '\0';
possible_help_request = 0;
/* Look up uid/uname of current user for future reference */
bsdtar->user_uid = geteuid();
bsdtar->user_uname = NULL;
if ((pwent = getpwuid(bsdtar->user_uid))) {
bsdtar->user_uname = (char *)malloc(strlen(pwent->pw_name)+1);
if (bsdtar->user_uname)
strcpy(bsdtar->user_uname, pwent->pw_name);
}
/* Default: open tape drive. */
bsdtar->filename = getenv("TAPE");
if (bsdtar->filename == NULL)
bsdtar->filename = _PATH_DEFTAPE;
/* Default: preserve mod time on extract */
bsdtar->extract_flags = ARCHIVE_EXTRACT_TIME;
if (bsdtar->user_uid == 0)
bsdtar->extract_flags |= ARCHIVE_EXTRACT_OWNER;
bsdtar->progname = strrchr(*argv, '/');
if (bsdtar->progname != NULL)
bsdtar->progname++;
else
bsdtar->progname = *argv;
/* Rewrite traditional-style tar arguments, if used. */
argv = rewrite_argv(bsdtar, &argc, argv, tar_opts);
bsdtar->argv = argv;
bsdtar->argc = argc;
/* Process all remaining arguments now. */
while ((opt = bsdtar_getopt(bsdtar, tar_opts, &option)) != -1) {
switch (opt) {
case 'B': /* GNU tar */
/* libarchive doesn't need this; just ignore it. */
break;
case 'b': /* SUSv2 */
bsdtar->bytes_per_block = 512 * atoi(optarg);
break;
case 'C': /* GNU tar */
/* Defer first -C until after -f is opened. */
bsdtar->start_dir = optarg;
break;
case 'c': /* SUSv2 */
if (mode != '\0')
bsdtar_errc(bsdtar, 1, 0,
"Can't specify both -%c and -%c",
opt, mode);
mode = opt;
break;
case OPTION_EXCLUDE: /* GNU tar */
exclude(bsdtar, optarg);
break;
case 'F':
bsdtar->create_format = optarg;
break;
case 'f': /* SUSv2 */
bsdtar->filename = optarg;
if (strcmp(bsdtar->filename, "-") == 0)
bsdtar->filename = NULL;
break;
case OPTION_FAST_READ: /* GNU tar */
bsdtar->option_fast_read = 1;
break;
case 'H': /* BSD convention */
bsdtar->symlink_mode = 'H';
break;
case 'h': /* Linux Standards Base, gtar; synonym for -L */
bsdtar->symlink_mode = 'L';
/* Hack: -h by itself is the "help" command. */
possible_help_request = 1;
break;
case OPTION_HELP:
long_help(bsdtar);
exit(0);
break;
case OPTION_INCLUDE:
include(bsdtar, optarg);
break;
case 'j': /* GNU tar */
if (bsdtar->create_compression != '\0')
bsdtar_errc(bsdtar, 1, 0,
"Can't specify both -%c and -%c", opt,
bsdtar->create_compression);
bsdtar->create_compression = opt;
break;
case 'k': /* GNU tar */
bsdtar->extract_flags |= ARCHIVE_EXTRACT_NO_OVERWRITE;
break;
case 'L': /* BSD convention */
bsdtar->symlink_mode = 'L';
break;
case 'l': /* SUSv2; note that GNU -l conflicts */
bsdtar->option_warn_links = 1;
break;
case 'm': /* SUSv2 */
bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_TIME;
break;
case 'n': /* GNU tar */
bsdtar->option_no_subdirs = 1;
break;
case OPTION_NODUMP: /* star */
bsdtar->option_honor_nodump = 1;
break;
case OPTION_NO_SAME_PERMISSIONS: /* GNU tar */
/*
* This is always the default in FreeBSD's
* version of GNU tar; it's also the default
* behavior for bsdtar, so treat the
* command-line option as a no-op.
*/
break;
case OPTION_NULL: /* GNU tar */
bsdtar->option_null++;
break;
case 'O': /* GNU tar */
bsdtar->option_stdout = 1;
break;
case 'o': /* SUSv2; note that GNU -o conflicts */
bsdtar->option_no_owner = 1;
bsdtar->extract_flags &= ~ARCHIVE_EXTRACT_OWNER;
break;
case OPTION_ONE_FILE_SYSTEM: /* -l in GNU tar */
bsdtar->option_dont_traverse_mounts = 1;
break;
#if 0
/*
* The common BSD -P option is not necessary, since
* our default is to archive symlinks, not follow
* them. This is convenient, as -P conflicts with GNU
* tar anyway.
*/
case 'P': /* BSD convention */
/* Default behavior, no option necessary. */
break;
#endif
case 'P': /* GNU tar */
bsdtar->option_absolute_paths = 1;
break;
case 'p': /* GNU tar, star */
bsdtar->extract_flags |= ARCHIVE_EXTRACT_PERM;
bsdtar->extract_flags |= ARCHIVE_EXTRACT_ACL;
bsdtar->extract_flags |= ARCHIVE_EXTRACT_FFLAGS;
break;
case 'r': /* SUSv2 */
if (mode != '\0')
bsdtar_errc(bsdtar, 1, 0,
"Can't specify both -%c and -%c",
opt, mode);
mode = opt;
break;
case 'T': /* GNU tar */
bsdtar->names_from_file = optarg;
break;
case 't': /* SUSv2 */
if (mode != '\0')
bsdtar_errc(bsdtar, 1, 0,
"Can't specify both -%c and -%c",
opt, mode);
mode = opt;
bsdtar->verbose++;
break;
case 'U': /* GNU tar */
bsdtar->extract_flags |= ARCHIVE_EXTRACT_UNLINK;
bsdtar->option_unlink_first = 1;
break;
case 'u': /* SUSv2 */
if (mode != '\0')
bsdtar_errc(bsdtar, 1, 0,
"Can't specify both -%c and -%c",
opt, mode);
mode = opt;
break;
case 'v': /* SUSv2 */
bsdtar->verbose++;
break;
case 'w': /* SUSv2 */
bsdtar->option_interactive = 1;
break;
case 'X': /* GNU tar */
exclude_from_file(bsdtar, optarg);
break;
case 'x': /* SUSv2 */
if (mode != '\0')
bsdtar_errc(bsdtar, 1, 0,
"Can't specify both -%c and -%c",
opt, mode);
mode = opt;
break;
case 'y': /* FreeBSD version of GNU tar */
if (bsdtar->create_compression != '\0')
bsdtar_errc(bsdtar, 1, 0,
"Can't specify both -%c and -%c", opt,
bsdtar->create_compression);
bsdtar->create_compression = opt;
break;
case 'Z': /* GNU tar */
if (bsdtar->create_compression != '\0')
bsdtar_errc(bsdtar, 1, 0,
"Can't specify both -%c and -%c", opt,
bsdtar->create_compression);
bsdtar->create_compression = opt;
break;
case 'z': /* GNU tar, star, many others */
if (bsdtar->create_compression != '\0')
bsdtar_errc(bsdtar, 1, 0,
"Can't specify both -%c and -%c", opt,
bsdtar->create_compression);
bsdtar->create_compression = opt;
break;
default:
usage(bsdtar);
}
}
/*
* Sanity-check options.
*/
if (mode == '\0' && possible_help_request) {
long_help(bsdtar);
exit(0);
}
if (mode == '\0')
bsdtar_errc(bsdtar, 1, 0,
"Must specify one of -c, -r, -t, -u, -x");
/* Check boolean options only permitted in certain modes. */
if (bsdtar->option_absolute_paths)
only_mode(bsdtar, mode, "-P", "xcru");
if (bsdtar->option_dont_traverse_mounts)
only_mode(bsdtar, mode, "-X", "cru");
if (bsdtar->option_fast_read)
only_mode(bsdtar, mode, "--fast-read", "xt");
if (bsdtar->option_honor_nodump)
only_mode(bsdtar, mode, "--nodump", "cru");
if (bsdtar->option_no_owner) {
only_mode(bsdtar, mode, "-o", "xc");
/* Warn about nonsensical -co combination, but ignore it. */
if (mode == 'c')
bsdtar_warnc(bsdtar, 0, "-o is incompatible with -c");
}
if (bsdtar->option_no_subdirs)
only_mode(bsdtar, mode, "-n", "cru");
if (bsdtar->option_stdout)
only_mode(bsdtar, mode, "-O", "x");
if (bsdtar->option_warn_links)
only_mode(bsdtar, mode, "-l", "cr");
/* Check other parameters only permitted in certain modes. */
if (bsdtar->create_compression == 'Z' && mode == 'c') {
bsdtar_warnc(bsdtar, 0, ".Z compression not supported");
usage(bsdtar);
}
if (bsdtar->create_compression != '\0') {
strcpy(buff, "-?");
buff[1] = bsdtar->create_compression;
only_mode(bsdtar, mode, buff, "cxt");
}
if (bsdtar->create_format != NULL)
only_mode(bsdtar, mode, "-F", "c");
if (bsdtar->symlink_mode != '\0') {
strcpy(buff, "-?");
buff[1] = bsdtar->symlink_mode;
only_mode(bsdtar, mode, buff, "cru");
}
bsdtar->argc -= optind;
bsdtar->argv += optind;
switch(mode) {
case 'c':
tar_mode_c(bsdtar);
break;
case 'r':
tar_mode_r(bsdtar);
break;
case 't':
tar_mode_t(bsdtar);
break;
case 'u':
tar_mode_u(bsdtar);
break;
case 'x':
tar_mode_x(bsdtar);
break;
}
if (bsdtar->user_uname != NULL)
free(bsdtar->user_uname);
cleanup_exclusions(bsdtar);
return (bsdtar->return_value);
}
/*
* Verify that the mode is correct.
*/
static void
only_mode(struct bsdtar *bsdtar, char mode,
const char *opt, const char *valid_modes)
{
if (strchr(valid_modes, mode) == NULL)
bsdtar_errc(bsdtar, 1, 0,
"Option %s is not permitted in mode -%c",
opt, mode);
}
/*-
* Convert traditional tar arguments into new-style.
* For example,
* tar tvfb file.tar 32 --exclude FOO
* will be converted to
* tar -t -v -f file.tar -b 32 --exclude FOO
*
* This requires building a new argv array. The initial bundled word
* gets expanded into a new string that looks like "-t\0-v\0-f\0-b\0".
* The new argv array has pointers into this string intermingled with
* pointers to the existing arguments. Arguments are moved to
* immediately follow their options.
*
* The optstring argument here is the same one passed to getopt(3).
* It is used to determine which option letters have trailing arguments.
*/
char **
rewrite_argv(struct bsdtar *bsdtar, int *argc, char ** src_argv,
const char *optstring)
{
char **new_argv, **dest_argv;
const char *p;
char *src, *dest;
if (src_argv[1] == NULL || src_argv[1][0] == '-')
return (src_argv);
*argc += strlen(src_argv[1]) - 1;
new_argv = malloc((*argc + 1) * sizeof(new_argv[0]));
if (new_argv == NULL)
bsdtar_errc(bsdtar, 1, errno, "No Memory");
dest_argv = new_argv;
*dest_argv++ = *src_argv++;
dest = malloc(strlen(*src_argv) * 3);
if (dest == NULL)
bsdtar_errc(bsdtar, 1, errno, "No memory");
for (src = *src_argv++; *src != '\0'; src++) {
*dest_argv++ = dest;
*dest++ = '-';
*dest++ = *src;
*dest++ = '\0';
/* If option takes an argument, insert that into the list. */
for (p = optstring; p != NULL && *p != '\0'; p++) {
if (*p != *src)
continue;
if (p[1] != ':') /* No arg required, done. */
break;
if (*src_argv == NULL) /* No arg available? Error. */
bsdtar_errc(bsdtar, 1, 0,
"Option %c requires an argument",
*src);
*dest_argv++ = *src_argv++;
break;
}
}
/* Copy remaining arguments, including trailing NULL. */
while ((*dest_argv++ = *src_argv++) != NULL)
;
return (new_argv);
}
void
usage(struct bsdtar *bsdtar)
{
const char *p;
p = bsdtar->progname;
fprintf(stderr, "Usage:\n");
fprintf(stderr, " List: %s -tf <archive-filename>\n", p);
fprintf(stderr, " Extract: %s -xf <archive-filename>\n", p);
fprintf(stderr, " Create: %s -cf <archive-filename> [filenames...]\n", p);
#ifdef HAVE_GETOPT_LONG
fprintf(stderr, " Help: %s --help\n", p);
#else
fprintf(stderr, " Help: %s -h\n", p);
#endif
exit(1);
}
static const char *long_help_msg[] = {
"First option must be a mode specifier:\n",
" -c Create -r Add/Replace -t List -u Update -x Extract\n",
"Common Options:\n",
" -b # Use # 512-byte records per I/O block\n",
" -f <filename> Location of archive (default " _PATH_DEFTAPE ")\n",
" -v Verbose\n",
" -w Interactive\n",
"Create: %p -c [options] [<file> | <dir> | @<archive> | C=<dir> ]\n",
" <file>, <dir> add these items to archive\n",
" -z, -j Compress archive with gzip/bzip2\n",
" -F {ustar|pax|cpio|shar} Select archive format\n",
#ifdef HAVE_GETOPT_LONG
" --exclude <pattern> Skip files that match pattern\n",
#else
" -W exclude=<pattern> Skip files that match pattern\n",
#endif
" C=<dir> Change to <dir> before processing remaining files\n",
" @<archive> Add entries from <archive> to output\n",
"List: %p -t [options] [<patterns>]\n",
" <patterns> If specified, list only entries that match\n",
"Extract: %p -x [options] [<patterns>]\n",
" <patterns> If specified, extract only entries that match\n",
" -k Keep (don't overwrite) existing files\n",
" -m Don't restore modification times\n",
" -O Write entries to stdout, don't restore to disk\n",
" -p Restore permissions (including ACLs, owner, file flags)\n",
NULL
};
/*
* Note that the word 'bsdtar' will always appear in the first line
* of output.
*
* In particular, /bin/sh scripts that need to test for the presence
* of bsdtar can use the following template:
*
* if (tar --help 2>&1 | grep bsdtar >/dev/null 2>&1 ) then \
* echo bsdtar; else echo not bsdtar; fi
*/
static void
long_help(struct bsdtar *bsdtar)
{
const char *prog;
const char *p;
const char **msg;
prog = bsdtar->progname;
fflush(stderr);
if (strcmp(prog,"bsdtar")!=0)
p = "(bsdtar)";
else
p = "";
fprintf(stdout, "%s%s: manipulate archive files\n", prog, p);
for (msg = long_help_msg; *msg != NULL; msg++) {
for (p = *msg; p != NULL; p++) {
if (*p == '\0')
break;
else if (*p == '%') {
if (p[1] == 'p') {
fputs(prog, stdout);
p++;
} else
putchar('%');
} else
putchar(*p);
}
}
fflush(stderr);
}
static int
bsdtar_getopt(struct bsdtar *bsdtar, const char *optstring,
const struct option **poption)
{
char *p, *q;
const struct option *option;
int opt;
int option_index;
size_t option_length;
option_index = -1;
*poption = NULL;
#ifdef HAVE_GETOPT_LONG
opt = getopt_long(bsdtar->argc, bsdtar->argv, optstring,
tar_longopts, &option_index);
if (option_index > -1)
*poption = tar_longopts + option_index;
#else
opt = getopt(bsdtar->argc, bsdtar->argv, optstring);
#endif
/* Support long options through -W longopt=value */
if (opt == 'W') {
p = optarg;
q = strchr(optarg, '=');
if (q != NULL) {
option_length = q - p;
optarg = q + 1;
} else {
option_length = strlen(p);
optarg = NULL;
}
option = tar_longopts;
while (option->name != NULL &&
(strlen(option->name) < option_length ||
strncmp(p, option->name, option_length) != 0 )) {
option++;
}
if (option->name != NULL) {
*poption = option;
opt = option->val;
/* Check if there's another match. */
option++;
while (option->name != NULL &&
(strlen(option->name) < option_length ||
strncmp(p, option->name, option_length) != 0)) {
option++;
}
if (option->name != NULL)
bsdtar_errc(bsdtar, 1, 0,
"Ambiguous option %s "
"(matches both %s and %s)",
p, (*poption)->name, option->name);
} else {
opt = '?';
/* TODO: Set up a fake 'struct option' for
* error reporting... ? ? ? */
}
}
return (opt);
}
|