1 /*-
2 * Copyright (c) 2003-2007 Tim Kientzle
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 *
14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR(S) ``AS IS'' AND ANY EXPRESS OR
15 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
16 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
17 * IN NO EVENT SHALL THE AUTHOR(S) BE LIABLE FOR ANY DIRECT, INDIRECT,
18 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
19 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
20 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
21 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
22 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
23 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
24 */
25
26 #include "bsdtar_platform.h"
27
28 #ifdef HAVE_SYS_STAT_H
29 #include <sys/stat.h>
30 #endif
31 #ifdef HAVE_SYS_TYPES_H
32 #include <sys/types.h> /* Linux doesn't define mode_t, etc. in sys/stat.h. */
33 #endif
34 #include <ctype.h>
35 #ifdef HAVE_ERRNO_H
36 #include <errno.h>
37 #endif
38 #ifdef HAVE_IO_H
39 #include <io.h>
40 #endif
41 #ifdef HAVE_STDARG_H
42 #include <stdarg.h>
43 #endif
44 #ifdef HAVE_STDINT_H
45 #include <stdint.h>
46 #endif
47 #include <stdio.h>
48 #ifdef HAVE_STDLIB_H
49 #include <stdlib.h>
50 #endif
51 #ifdef HAVE_STRING_H
52 #include <string.h>
53 #endif
54 #ifdef HAVE_WCTYPE_H
55 #include <wctype.h>
56 #else
57 /* If we don't have wctype, we need to hack up some version of iswprint(). */
58 #define iswprint isprint
59 #endif
60
61 #include "bsdtar.h"
62 #include "err.h"
63 #include "passphrase.h"
64
65 static size_t bsdtar_expand_char(char *, size_t, size_t, char);
66 static const char *strip_components(const char *path, int elements);
67
68 #if defined(_WIN32) && !defined(__CYGWIN__)
69 #define read _read
70 #endif
71
72 /* TODO: Hack up a version of mbtowc for platforms with no wide
73 * character support at all. I think the following might suffice,
74 * but it needs careful testing.
75 * #if !HAVE_MBTOWC
76 * #define mbtowc(wcp, p, n) ((*wcp = *p), 1)
77 * #endif
78 */
79
80 /*
81 * Print a string, taking care with any non-printable characters.
82 *
83 * Note that we use a stack-allocated buffer to receive the formatted
84 * string if we can. This is partly performance (avoiding a call to
85 * malloc()), partly out of expedience (we have to call vsnprintf()
86 * before malloc() anyway to find out how big a buffer we need; we may
87 * as well point that first call at a small local buffer in case it
88 * works), but mostly for safety (so we can use this to print messages
89 * about out-of-memory conditions).
90 */
91
92 void
safe_fprintf(FILE * f,const char * fmt,...)93 safe_fprintf(FILE *f, const char *fmt, ...)
94 {
95 char fmtbuff_stack[256]; /* Place to format the printf() string. */
96 char outbuff[256]; /* Buffer for outgoing characters. */
97 char *fmtbuff_heap; /* If fmtbuff_stack is too small, we use malloc */
98 char *fmtbuff; /* Pointer to fmtbuff_stack or fmtbuff_heap. */
99 int fmtbuff_length;
100 int length, n;
101 va_list ap;
102 const char *p;
103 unsigned i;
104 wchar_t wc;
105 char try_wc;
106
107 /* Use a stack-allocated buffer if we can, for speed and safety. */
108 fmtbuff_heap = NULL;
109 fmtbuff_length = sizeof(fmtbuff_stack);
110 fmtbuff = fmtbuff_stack;
111
112 /* Try formatting into the stack buffer. */
113 va_start(ap, fmt);
114 length = vsnprintf(fmtbuff, fmtbuff_length, fmt, ap);
115 va_end(ap);
116
117 /* If the result was too large, allocate a buffer on the heap. */
118 while (length < 0 || length >= fmtbuff_length) {
119 if (length >= fmtbuff_length)
120 fmtbuff_length = length+1;
121 else if (fmtbuff_length < 8192)
122 fmtbuff_length *= 2;
123 else if (fmtbuff_length < 1000000)
124 fmtbuff_length += fmtbuff_length / 4;
125 else {
126 length = fmtbuff_length;
127 fmtbuff_heap[length-1] = '\0';
128 break;
129 }
130 free(fmtbuff_heap);
131 fmtbuff_heap = malloc(fmtbuff_length);
132
133 /* Reformat the result into the heap buffer if we can. */
134 if (fmtbuff_heap != NULL) {
135 fmtbuff = fmtbuff_heap;
136 va_start(ap, fmt);
137 length = vsnprintf(fmtbuff, fmtbuff_length, fmt, ap);
138 va_end(ap);
139 } else {
140 /* Leave fmtbuff pointing to the truncated
141 * string in fmtbuff_stack. */
142 fmtbuff = fmtbuff_stack;
143 length = sizeof(fmtbuff_stack) - 1;
144 break;
145 }
146 }
147
148 /* Note: mbrtowc() has a cleaner API, but mbtowc() seems a bit
149 * more portable, so we use that here instead. */
150 if (mbtowc(NULL, NULL, 1) == -1) { /* Reset the shift state. */
151 /* mbtowc() should never fail in practice, but
152 * handle the theoretical error anyway. */
153 free(fmtbuff_heap);
154 return;
155 }
156
157 /* Write data, expanding unprintable characters. */
158 p = fmtbuff;
159 i = 0;
160 try_wc = 1;
161 while (*p != '\0') {
162
163 /* Convert to wide char, test if the wide
164 * char is printable in the current locale. */
165 if (try_wc && (n = mbtowc(&wc, p, length)) != -1) {
166 length -= n;
167 if (iswprint(wc) && wc != L'\\') {
168 /* Printable, copy the bytes through. */
169 while (n-- > 0)
170 outbuff[i++] = *p++;
171 } else {
172 /* Not printable, format the bytes. */
173 while (n-- > 0)
174 i += (unsigned)bsdtar_expand_char(
175 outbuff, sizeof(outbuff), i, *p++);
176 }
177 } else {
178 /* After any conversion failure, don't bother
179 * trying to convert the rest. */
180 i += (unsigned)bsdtar_expand_char(outbuff, sizeof(outbuff), i, *p++);
181 try_wc = 0;
182 }
183
184 /* If our output buffer is full, dump it and keep going. */
185 if (i > (sizeof(outbuff) - 128)) {
186 outbuff[i] = '\0';
187 fprintf(f, "%s", outbuff);
188 i = 0;
189 }
190 }
191 outbuff[i] = '\0';
192 fprintf(f, "%s", outbuff);
193
194 /* If we allocated a heap-based formatting buffer, free it now. */
195 free(fmtbuff_heap);
196 }
197
198 /*
199 * Render an arbitrary sequence of bytes into printable ASCII characters.
200 */
201 static size_t
bsdtar_expand_char(char * buff,size_t buffsize,size_t offset,char c)202 bsdtar_expand_char(char *buff, size_t buffsize, size_t offset, char c)
203 {
204 size_t i = offset;
205
206 if (isprint((unsigned char)c) && c != '\\')
207 buff[i++] = c;
208 else {
209 buff[i++] = '\\';
210 switch (c) {
211 case '\a': buff[i++] = 'a'; break;
212 case '\b': buff[i++] = 'b'; break;
213 case '\f': buff[i++] = 'f'; break;
214 case '\n': buff[i++] = 'n'; break;
215 #if '\r' != '\n'
216 /* On some platforms, \n and \r are the same. */
217 case '\r': buff[i++] = 'r'; break;
218 #endif
219 case '\t': buff[i++] = 't'; break;
220 case '\v': buff[i++] = 'v'; break;
221 case '\\': buff[i++] = '\\'; break;
222 default:
223 snprintf(buff + i, buffsize - i, "%03o", 0xFF & (int)c);
224 i += 3;
225 }
226 }
227
228 return (i - offset);
229 }
230
231 int
yes(const char * fmt,...)232 yes(const char *fmt, ...)
233 {
234 char buff[32];
235 char *p;
236 ssize_t l;
237
238 va_list ap;
239 va_start(ap, fmt);
240 vfprintf(stderr, fmt, ap);
241 va_end(ap);
242 fprintf(stderr, " (y/N)? ");
243 fflush(stderr);
244
245 l = read(2, buff, sizeof(buff) - 1);
246 if (l < 0) {
247 fprintf(stderr, "Keyboard read failed\n");
248 exit(1);
249 }
250 if (l == 0)
251 return (0);
252 buff[l] = 0;
253
254 for (p = buff; *p != '\0'; p++) {
255 if (isspace((unsigned char)*p))
256 continue;
257 switch(*p) {
258 case 'y': case 'Y':
259 return (1);
260 case 'n': case 'N':
261 return (0);
262 default:
263 return (0);
264 }
265 }
266
267 return (0);
268 }
269
270 /*-
271 * The logic here for -C <dir> attempts to avoid
272 * chdir() as long as possible. For example:
273 * "-C /foo -C /bar file" needs chdir("/bar") but not chdir("/foo")
274 * "-C /foo -C bar file" needs chdir("/foo/bar")
275 * "-C /foo -C bar /file1" does not need chdir()
276 * "-C /foo -C bar /file1 file2" needs chdir("/foo/bar") before file2
277 *
278 * The only correct way to handle this is to record a "pending" chdir
279 * request and combine multiple requests intelligently until we
280 * need to process a non-absolute file. set_chdir() adds the new dir
281 * to the pending list; do_chdir() actually executes any pending chdir.
282 *
283 * This way, programs that build tar command lines don't have to worry
284 * about -C with non-existent directories; such requests will only
285 * fail if the directory must be accessed.
286 *
287 */
288 void
set_chdir(struct bsdtar * bsdtar,const char * newdir)289 set_chdir(struct bsdtar *bsdtar, const char *newdir)
290 {
291 #if defined(_WIN32) && !defined(__CYGWIN__)
292 if (newdir[0] == '/' || newdir[0] == '\\' ||
293 /* Detect this type, for example, "C:\" or "C:/" */
294 (((newdir[0] >= 'a' && newdir[0] <= 'z') ||
295 (newdir[0] >= 'A' && newdir[0] <= 'Z')) &&
296 newdir[1] == ':' && (newdir[2] == '/' || newdir[2] == '\\'))) {
297 #else
298 if (newdir[0] == '/') {
299 #endif
300 /* The -C /foo -C /bar case; dump first one. */
301 free(bsdtar->pending_chdir);
302 bsdtar->pending_chdir = NULL;
303 }
304 if (bsdtar->pending_chdir == NULL)
305 /* Easy case: no previously-saved dir. */
306 bsdtar->pending_chdir = strdup(newdir);
307 else {
308 /* The -C /foo -C bar case; concatenate */
309 char *old_pending = bsdtar->pending_chdir;
310 size_t old_len = strlen(old_pending);
311 size_t new_len = old_len + strlen(newdir) + 2;
312 bsdtar->pending_chdir = malloc(new_len);
313 if (old_pending[old_len - 1] == '/')
314 old_pending[old_len - 1] = '\0';
315 if (bsdtar->pending_chdir != NULL)
316 snprintf(bsdtar->pending_chdir, new_len, "%s/%s",
317 old_pending, newdir);
318 free(old_pending);
319 }
320 if (bsdtar->pending_chdir == NULL)
321 lafe_errc(1, errno, "No memory");
322 }
323
324 void
325 do_chdir(struct bsdtar *bsdtar)
326 {
327 if (bsdtar->pending_chdir == NULL)
328 return;
329
330 if (chdir(bsdtar->pending_chdir) != 0) {
331 lafe_errc(1, 0, "could not chdir to '%s'\n",
332 bsdtar->pending_chdir);
333 }
334 free(bsdtar->pending_chdir);
335 bsdtar->pending_chdir = NULL;
336 }
337
338 static const char *
339 strip_components(const char *p, int elements)
340 {
341 /* Skip as many elements as necessary. */
342 while (elements > 0) {
343 switch (*p++) {
344 case '/':
345 #if defined(_WIN32) && !defined(__CYGWIN__)
346 case '\\': /* Support \ path sep on Windows ONLY. */
347 #endif
348 elements--;
349 break;
350 case '\0':
351 /* Path is too short, skip it. */
352 return (NULL);
353 }
354 }
355
356 /* Skip any / characters. This handles short paths that have
357 * additional / termination. This also handles the case where
358 * the logic above stops in the middle of a duplicate //
359 * sequence (which would otherwise get converted to an
360 * absolute path). */
361 for (;;) {
362 switch (*p) {
363 case '/':
364 #if defined(_WIN32) && !defined(__CYGWIN__)
365 case '\\': /* Support \ path sep on Windows ONLY. */
366 #endif
367 ++p;
368 break;
369 case '\0':
370 return (NULL);
371 default:
372 return (p);
373 }
374 }
375 }
376
377 static void
378 warn_strip_leading_char(struct bsdtar *bsdtar, const char *c)
379 {
380 if (!bsdtar->warned_lead_slash) {
381 lafe_warnc(0,
382 "Removing leading '%c' from member names",
383 c[0]);
384 bsdtar->warned_lead_slash = 1;
385 }
386 }
387
388 static void
389 warn_strip_drive_letter(struct bsdtar *bsdtar)
390 {
391 if (!bsdtar->warned_lead_slash) {
392 lafe_warnc(0,
393 "Removing leading drive letter from "
394 "member names");
395 bsdtar->warned_lead_slash = 1;
396 }
397 }
398
399 /*
400 * Convert absolute path to non-absolute path by skipping leading
401 * absolute path prefixes.
402 */
403 static const char*
404 strip_absolute_path(struct bsdtar *bsdtar, const char *p)
405 {
406 const char *rp;
407
408 /* Remove leading "//./" or "//?/" or "//?/UNC/"
409 * (absolute path prefixes used by Windows API) */
410 if ((p[0] == '/' || p[0] == '\\') &&
411 (p[1] == '/' || p[1] == '\\') &&
412 (p[2] == '.' || p[2] == '?') &&
413 (p[3] == '/' || p[3] == '\\'))
414 {
415 if (p[2] == '?' &&
416 (p[4] == 'U' || p[4] == 'u') &&
417 (p[5] == 'N' || p[5] == 'n') &&
418 (p[6] == 'C' || p[6] == 'c') &&
419 (p[7] == '/' || p[7] == '\\'))
420 p += 8;
421 else
422 p += 4;
423 warn_strip_drive_letter(bsdtar);
424 }
425
426 /* Remove multiple leading slashes and Windows drive letters. */
427 do {
428 rp = p;
429 if (((p[0] >= 'a' && p[0] <= 'z') ||
430 (p[0] >= 'A' && p[0] <= 'Z')) &&
431 p[1] == ':') {
432 p += 2;
433 warn_strip_drive_letter(bsdtar);
434 }
435
436 /* Remove leading "/../", "/./", "//", etc. */
437 while (p[0] == '/' || p[0] == '\\') {
438 if (p[1] == '.' &&
439 p[2] == '.' &&
440 (p[3] == '/' || p[3] == '\\')) {
441 p += 3; /* Remove "/..", leave "/" for next pass. */
442 } else if (p[1] == '.' &&
443 (p[2] == '/' || p[2] == '\\')) {
444 p += 2; /* Remove "/.", leave "/" for next pass. */
445 } else
446 p += 1; /* Remove "/". */
447 warn_strip_leading_char(bsdtar, rp);
448 }
449 } while (rp != p);
450
451 return (p);
452 }
453
454 /*
455 * Handle --strip-components and any future path-rewriting options.
456 * Returns non-zero if the pathname should not be extracted.
457 *
458 * Note: The rewrites are applied uniformly to pathnames and hardlink
459 * names but not to symlink bodies. This is deliberate: Symlink
460 * bodies are not necessarily filenames. Even when they are, they
461 * need to be interpreted relative to the directory containing them,
462 * so simple rewrites like this are rarely appropriate.
463 *
464 * TODO: Support pax-style regex path rewrites.
465 */
466 int
467 edit_pathname(struct bsdtar *bsdtar, struct archive_entry *entry)
468 {
469 const char *name = archive_entry_pathname(entry);
470 const char *original_name = name;
471 const char *hardlinkname = archive_entry_hardlink(entry);
472 const char *original_hardlinkname = hardlinkname;
473 #if defined(HAVE_REGEX_H) || defined(HAVE_PCREPOSIX_H) || defined(HAVE_PCRE2POSIX_H)
474 char *subst_name;
475 int r;
476
477 /* Apply user-specified substitution to pathname. */
478 r = apply_substitution(bsdtar, name, &subst_name, 0, 0);
479 if (r == -1) {
480 lafe_warnc(0, "Invalid substitution, skipping entry");
481 return 1;
482 }
483 if (r == 1) {
484 archive_entry_copy_pathname(entry, subst_name);
485 if (*subst_name == '\0') {
486 free(subst_name);
487 return -1;
488 } else
489 free(subst_name);
490 name = archive_entry_pathname(entry);
491 original_name = name;
492 }
493
494 /* Apply user-specified substitution to hardlink target. */
495 if (hardlinkname != NULL) {
496 r = apply_substitution(bsdtar, hardlinkname, &subst_name, 0, 1);
497 if (r == -1) {
498 lafe_warnc(0, "Invalid substitution, skipping entry");
499 return 1;
500 }
501 if (r == 1) {
502 archive_entry_copy_hardlink(entry, subst_name);
503 free(subst_name);
504 }
505 hardlinkname = archive_entry_hardlink(entry);
506 original_hardlinkname = hardlinkname;
507 }
508
509 /* Apply user-specified substitution to symlink body. */
510 if (archive_entry_symlink(entry) != NULL) {
511 r = apply_substitution(bsdtar, archive_entry_symlink(entry), &subst_name, 1, 0);
512 if (r == -1) {
513 lafe_warnc(0, "Invalid substitution, skipping entry");
514 return 1;
515 }
516 if (r == 1) {
517 archive_entry_copy_symlink(entry, subst_name);
518 free(subst_name);
519 }
520 }
521 #endif
522
523 /* Strip leading dir names as per --strip-components option. */
524 if (bsdtar->strip_components > 0) {
525 name = strip_components(name, bsdtar->strip_components);
526 if (name == NULL)
527 return (1);
528
529 if (hardlinkname != NULL) {
530 hardlinkname = strip_components(hardlinkname,
531 bsdtar->strip_components);
532 if (hardlinkname == NULL)
533 return (1);
534 }
535 }
536
537 if ((bsdtar->flags & OPTFLAG_ABSOLUTE_PATHS) == 0) {
538 /* By default, don't write or restore absolute pathnames. */
539 name = strip_absolute_path(bsdtar, name);
540 if (*name == '\0')
541 name = ".";
542
543 if (hardlinkname != NULL) {
544 hardlinkname = strip_absolute_path(bsdtar, hardlinkname);
545 if (*hardlinkname == '\0')
546 return (1);
547 }
548 } else {
549 /* Strip redundant leading '/' characters. */
550 while (name[0] == '/' && name[1] == '/')
551 name++;
552 }
553
554 /* Replace name in archive_entry. */
555 if (name != original_name) {
556 archive_entry_copy_pathname(entry, name);
557 }
558 if (hardlinkname != original_hardlinkname) {
559 archive_entry_copy_hardlink(entry, hardlinkname);
560 }
561 return (0);
562 }
563
564 /*
565 * It would be nice to just use printf() for formatting large numbers,
566 * but the compatibility problems are quite a headache. Hence the
567 * following simple utility function.
568 */
569 const char *
570 tar_i64toa(int64_t n0)
571 {
572 static char buff[24];
573 uint64_t n = n0 < 0 ? -n0 : n0;
574 char *p = buff + sizeof(buff);
575
576 *--p = '\0';
577 do {
578 *--p = '0' + (int)(n % 10);
579 } while (n /= 10);
580 if (n0 < 0)
581 *--p = '-';
582 return p;
583 }
584
585 /*
586 * Like strcmp(), but try to be a little more aware of the fact that
587 * we're comparing two paths. Right now, it just handles leading
588 * "./" and trailing '/' specially, so that "a/b/" == "./a/b"
589 *
590 * TODO: Make this better, so that "./a//b/./c/" == "a/b/c"
591 * TODO: After this works, push it down into libarchive.
592 * TODO: Publish the path normalization routines in libarchive so
593 * that bsdtar can normalize paths and use fast strcmp() instead
594 * of this.
595 *
596 * Note: This is currently only used within write.c, so should
597 * not handle \ path separators.
598 */
599
600 int
601 pathcmp(const char *a, const char *b)
602 {
603 /* Skip leading './' */
604 if (a[0] == '.' && a[1] == '/' && a[2] != '\0')
605 a += 2;
606 if (b[0] == '.' && b[1] == '/' && b[2] != '\0')
607 b += 2;
608 /* Find the first difference, or return (0) if none. */
609 while (*a == *b) {
610 if (*a == '\0')
611 return (0);
612 a++;
613 b++;
614 }
615 /*
616 * If one ends in '/' and the other one doesn't,
617 * they're the same.
618 */
619 if (a[0] == '/' && a[1] == '\0' && b[0] == '\0')
620 return (0);
621 if (a[0] == '\0' && b[0] == '/' && b[1] == '\0')
622 return (0);
623 /* They're really different, return the correct sign. */
624 return (*(const unsigned char *)a - *(const unsigned char *)b);
625 }
626
627 #define PPBUFF_SIZE 1024
628 const char *
629 passphrase_callback(struct archive *a, void *_client_data)
630 {
631 struct bsdtar *bsdtar = (struct bsdtar *)_client_data;
632 (void)a; /* UNUSED */
633
634 if (bsdtar->ppbuff == NULL) {
635 bsdtar->ppbuff = malloc(PPBUFF_SIZE);
636 if (bsdtar->ppbuff == NULL)
637 lafe_errc(1, errno, "Out of memory");
638 }
639 return lafe_readpassphrase("Enter passphrase:",
640 bsdtar->ppbuff, PPBUFF_SIZE);
641 }
642
643 void
644 passphrase_free(char *ppbuff)
645 {
646 if (ppbuff != NULL) {
647 memset(ppbuff, 0, PPBUFF_SIZE);
648 free(ppbuff);
649 }
650 }
651
652 /*
653 * Display information about the current file.
654 *
655 * The format here roughly duplicates the output of 'ls -l'.
656 * This is based on SUSv2, where 'tar tv' is documented as
657 * listing additional information in an "unspecified format,"
658 * and 'pax -l' is documented as using the same format as 'ls -l'.
659 */
660 void
661 list_item_verbose(struct bsdtar *bsdtar, FILE *out, struct archive_entry *entry)
662 {
663 char tmp[100];
664 size_t w;
665 const char *p;
666 const char *fmt;
667 time_t tim;
668 static time_t now;
669 struct tm *ltime;
670 #if defined(HAVE_LOCALTIME_R) || defined(HAVE_LOCALTIME_S)
671 struct tm tmbuf;
672 #endif
673
674 /*
675 * We avoid collecting the entire list in memory at once by
676 * listing things as we see them. However, that also means we can't
677 * just pre-compute the field widths. Instead, we start with guesses
678 * and just widen them as necessary. These numbers are completely
679 * arbitrary.
680 */
681 if (!bsdtar->u_width) {
682 bsdtar->u_width = 6;
683 bsdtar->gs_width = 13;
684 }
685 if (!now)
686 time(&now);
687 fprintf(out, "%s %d ",
688 archive_entry_strmode(entry),
689 archive_entry_nlink(entry));
690
691 /* Use uname if it's present, else uid. */
692 p = archive_entry_uname(entry);
693 if ((p == NULL) || (*p == '\0')) {
694 snprintf(tmp, sizeof(tmp), "%lu ",
695 (unsigned long)archive_entry_uid(entry));
696 p = tmp;
697 }
698 w = strlen(p);
699 if (w > bsdtar->u_width)
700 bsdtar->u_width = w;
701 fprintf(out, "%-*s ", (int)bsdtar->u_width, p);
702
703 /* Use gname if it's present, else gid. */
704 p = archive_entry_gname(entry);
705 if (p != NULL && p[0] != '\0') {
706 fprintf(out, "%s", p);
707 w = strlen(p);
708 } else {
709 snprintf(tmp, sizeof(tmp), "%lu",
710 (unsigned long)archive_entry_gid(entry));
711 w = strlen(tmp);
712 fprintf(out, "%s", tmp);
713 }
714
715 /*
716 * Print device number or file size, right-aligned so as to make
717 * total width of group and devnum/filesize fields be gs_width.
718 * If gs_width is too small, grow it.
719 */
720 if (archive_entry_filetype(entry) == AE_IFCHR
721 || archive_entry_filetype(entry) == AE_IFBLK) {
722 snprintf(tmp, sizeof(tmp), "%lu,%lu",
723 (unsigned long)archive_entry_rdevmajor(entry),
724 (unsigned long)archive_entry_rdevminor(entry));
725 } else {
726 strcpy(tmp, tar_i64toa(archive_entry_size(entry)));
727 }
728 if (w + strlen(tmp) >= bsdtar->gs_width)
729 bsdtar->gs_width = w+strlen(tmp)+1;
730 fprintf(out, "%*s", (int)(bsdtar->gs_width - w), tmp);
731
732 /* Format the time using 'ls -l' conventions. */
733 tim = archive_entry_mtime(entry);
734 #define HALF_YEAR (time_t)365 * 86400 / 2
735 #if defined(_WIN32) && !defined(__CYGWIN__)
736 #define DAY_FMT "%d" /* Windows' strftime function does not support %e format. */
737 #else
738 #define DAY_FMT "%e" /* Day number without leading zeros */
739 #endif
740 if (tim < now - HALF_YEAR || tim > now + HALF_YEAR)
741 fmt = bsdtar->day_first ? DAY_FMT " %b %Y" : "%b " DAY_FMT " %Y";
742 else
743 fmt = bsdtar->day_first ? DAY_FMT " %b %H:%M" : "%b " DAY_FMT " %H:%M";
744 #if defined(HAVE_LOCALTIME_S)
745 ltime = localtime_s(&tmbuf, &tim) ? NULL : &tmbuf;
746 #elif defined(HAVE_LOCALTIME_R)
747 ltime = localtime_r(&tim, &tmbuf);
748 #else
749 ltime = localtime(&tim);
750 #endif
751 strftime(tmp, sizeof(tmp), fmt, ltime);
752 fprintf(out, " %s ", tmp);
753 safe_fprintf(out, "%s", archive_entry_pathname(entry));
754
755 /* Extra information for links. */
756 if (archive_entry_hardlink(entry)) /* Hard link */
757 safe_fprintf(out, " link to %s",
758 archive_entry_hardlink(entry));
759 else if (archive_entry_symlink(entry)) /* Symbolic link */
760 safe_fprintf(out, " -> %s", archive_entry_symlink(entry));
761 }
762