2 * Copyright (c) 2003-2007 Tim Kientzle
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
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.
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.
26 #include "bsdtar_platform.h"
27 __FBSDID("$FreeBSD$");
29 #ifdef HAVE_SYS_TYPES_H
30 #include <sys/types.h>
33 #include <sys/mkdev.h>
34 #elif defined(MAJOR_IN_SYSMACROS)
35 #include <sys/sysmacros.h>
37 #ifdef HAVE_SYS_PARAM_H
38 #include <sys/param.h>
40 #ifdef HAVE_SYS_STAT_H
72 static void list_item_verbose(struct bsdtar *, FILE *,
73 struct archive_entry *);
74 static void read_archive(struct bsdtar *bsdtar, char mode);
77 tar_mode_t(struct bsdtar *bsdtar)
79 read_archive(bsdtar, 't');
83 tar_mode_x(struct bsdtar *bsdtar)
85 read_archive(bsdtar, 'x');
89 * Handle 'x' and 't' modes.
92 read_archive(struct bsdtar *bsdtar, char mode)
96 struct archive_entry *entry;
97 const struct stat *st;
100 while (*bsdtar->argv) {
101 include(bsdtar, *bsdtar->argv);
105 if (bsdtar->names_from_file != NULL)
106 include_from_file(bsdtar, bsdtar->names_from_file);
108 a = archive_read_new();
109 if (bsdtar->compress_program != NULL)
110 archive_read_support_compression_program(a, bsdtar->compress_program);
112 archive_read_support_compression_all(a);
113 archive_read_support_format_all(a);
114 if (archive_read_open_file(a, bsdtar->filename,
115 bsdtar->bytes_per_block != 0 ? bsdtar->bytes_per_block :
116 DEFAULT_BYTES_PER_BLOCK))
117 bsdtar_errc(bsdtar, 1, 0, "Error opening archive: %s",
118 archive_error_string(a));
122 if (mode == 'x' && bsdtar->option_chroot) {
124 if (chroot(".") != 0)
125 bsdtar_errc(bsdtar, 1, errno, "Can't chroot to \".\"");
127 bsdtar_errc(bsdtar, 1, 0,
128 "chroot isn't supported on this platform");
133 /* Support --fast-read option */
134 if (bsdtar->option_fast_read &&
135 unmatched_inclusions(bsdtar) == 0)
138 r = archive_read_next_header(a, &entry);
139 if (r == ARCHIVE_EOF)
142 bsdtar_warnc(bsdtar, 0, "%s", archive_error_string(a));
143 if (r <= ARCHIVE_WARN)
144 bsdtar->return_value = 1;
145 if (r == ARCHIVE_RETRY) {
146 /* Retryable error: try again */
147 bsdtar_warnc(bsdtar, 0, "Retrying...");
150 if (r == ARCHIVE_FATAL)
154 * Exclude entries that are too old.
156 st = archive_entry_stat(entry);
157 if (bsdtar->newer_ctime_sec > 0) {
158 if (st->st_ctime < bsdtar->newer_ctime_sec)
159 continue; /* Too old, skip it. */
160 if (st->st_ctime == bsdtar->newer_ctime_sec
161 && ARCHIVE_STAT_CTIME_NANOS(st)
162 <= bsdtar->newer_ctime_nsec)
163 continue; /* Too old, skip it. */
165 if (bsdtar->newer_mtime_sec > 0) {
166 if (st->st_mtime < bsdtar->newer_mtime_sec)
167 continue; /* Too old, skip it. */
168 if (st->st_mtime == bsdtar->newer_mtime_sec
169 && ARCHIVE_STAT_MTIME_NANOS(st)
170 <= bsdtar->newer_mtime_nsec)
171 continue; /* Too old, skip it. */
175 * Note that pattern exclusions are checked before
176 * pathname rewrites are handled. This gives more
177 * control over exclusions, since rewrites always lose
178 * information. (For example, consider a rewrite
179 * s/foo[0-9]/foo/. If we check exclusions after the
180 * rewrite, there would be no way to exclude foo1/bar
181 * while allowing foo2/bar.)
183 if (excluded(bsdtar, archive_entry_pathname(entry)))
184 continue; /* Excluded by a pattern test. */
187 * Modify the pathname as requested by the user. We
188 * do this for -t as well to give users a way to
189 * preview the effects of their rewrites. We also do
190 * this before extraction security checks (including
191 * leading '/' removal). Note that some rewrite
192 * failures prevent extraction.
194 if (edit_pathname(bsdtar, entry))
195 continue; /* Excluded by a rewrite failure. */
198 /* Perversely, gtar uses -O to mean "send to stderr"
199 * when used with -t. */
200 out = bsdtar->option_stdout ? stderr : stdout;
202 if (bsdtar->verbose < 2)
203 safe_fprintf(out, "%s",
204 archive_entry_pathname(entry));
206 list_item_verbose(bsdtar, out, entry);
208 r = archive_read_data_skip(a);
209 if (r == ARCHIVE_WARN) {
211 bsdtar_warnc(bsdtar, 0, "%s",
212 archive_error_string(a));
214 if (r == ARCHIVE_RETRY) {
216 bsdtar_warnc(bsdtar, 0, "%s",
217 archive_error_string(a));
219 if (r == ARCHIVE_FATAL) {
221 bsdtar_warnc(bsdtar, 0, "%s",
222 archive_error_string(a));
223 bsdtar->return_value = 1;
228 if (bsdtar->option_interactive &&
229 !yes("extract '%s'", archive_entry_pathname(entry)))
233 * Format here is from SUSv2, including the
236 if (bsdtar->verbose) {
237 safe_fprintf(stderr, "x %s",
238 archive_entry_pathname(entry));
241 if (bsdtar->option_stdout)
242 r = archive_read_data_into_fd(a, 1);
244 r = archive_read_extract(a, entry,
245 bsdtar->extract_flags);
246 if (r != ARCHIVE_OK) {
247 if (!bsdtar->verbose)
248 safe_fprintf(stderr, "%s",
249 archive_entry_pathname(entry));
250 safe_fprintf(stderr, ": %s",
251 archive_error_string(a));
252 if (!bsdtar->verbose)
253 fprintf(stderr, "\n");
254 bsdtar->return_value = 1;
257 fprintf(stderr, "\n");
258 if (r == ARCHIVE_FATAL)
263 if (bsdtar->verbose > 2)
264 fprintf(stdout, "Archive Format: %s, Compression: %s\n",
265 archive_format_name(a), archive_compression_name(a));
267 archive_read_finish(a);
272 * Display information about the current file.
274 * The format here roughly duplicates the output of 'ls -l'.
275 * This is based on SUSv2, where 'tar tv' is documented as
276 * listing additional information in an "unspecified format,"
277 * and 'pax -l' is documented as using the same format as 'ls -l'.
280 list_item_verbose(struct bsdtar *bsdtar, FILE *out, struct archive_entry *entry)
282 const struct stat *st;
290 st = archive_entry_stat(entry);
293 * We avoid collecting the entire list in memory at once by
294 * listing things as we see them. However, that also means we can't
295 * just pre-compute the field widths. Instead, we start with guesses
296 * and just widen them as necessary. These numbers are completely
299 if (!bsdtar->u_width) {
301 bsdtar->gs_width = 13;
305 bsdtar_strmode(entry, tmp);
306 fprintf(out, "%s %d ", tmp, (int)(st->st_nlink));
308 /* Use uname if it's present, else uid. */
309 p = archive_entry_uname(entry);
310 if ((p == NULL) || (*p == '\0')) {
311 sprintf(tmp, "%lu ", (unsigned long)st->st_uid);
315 if (w > bsdtar->u_width)
317 fprintf(out, "%-*s ", (int)bsdtar->u_width, p);
319 /* Use gname if it's present, else gid. */
320 p = archive_entry_gname(entry);
321 if (p != NULL && p[0] != '\0') {
322 fprintf(out, "%s", p);
325 sprintf(tmp, "%lu", (unsigned long)st->st_gid);
327 fprintf(out, "%s", tmp);
331 * Print device number or file size, right-aligned so as to make
332 * total width of group and devnum/filesize fields be gs_width.
333 * If gs_width is too small, grow it.
335 if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode)) {
336 sprintf(tmp, "%lu,%lu",
337 (unsigned long)major(st->st_rdev),
338 (unsigned long)minor(st->st_rdev)); /* ls(1) also casts here. */
341 * Note the use of platform-dependent macros to format
342 * the filesize here. We need the format string and the
343 * corresponding type for the cast.
345 sprintf(tmp, BSDTAR_FILESIZE_PRINTF,
346 (BSDTAR_FILESIZE_TYPE)st->st_size);
348 if (w + strlen(tmp) >= bsdtar->gs_width)
349 bsdtar->gs_width = w+strlen(tmp)+1;
350 fprintf(out, "%*s", (int)(bsdtar->gs_width - w), tmp);
352 /* Format the time using 'ls -l' conventions. */
353 tim = (time_t)st->st_mtime;
354 if (abs(tim - now) > (365/2)*86400)
355 fmt = bsdtar->day_first ? "%e %b %Y" : "%b %e %Y";
357 fmt = bsdtar->day_first ? "%e %b %H:%M" : "%b %e %H:%M";
358 strftime(tmp, sizeof(tmp), fmt, localtime(&tim));
359 fprintf(out, " %s ", tmp);
360 safe_fprintf(out, "%s", archive_entry_pathname(entry));
362 /* Extra information for links. */
363 if (archive_entry_hardlink(entry)) /* Hard link */
364 safe_fprintf(out, " link to %s",
365 archive_entry_hardlink(entry));
366 else if (S_ISLNK(st->st_mode)) /* Symbolic link */
367 safe_fprintf(out, " -> %s", archive_entry_symlink(entry));