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: src/usr.bin/tar/read.c,v 1.31 2007/04/16 04:04:50 cperciva Exp $");
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 /* Support --fast-read option */
123 if (bsdtar->option_fast_read &&
124 unmatched_inclusions(bsdtar) == 0)
127 r = archive_read_next_header(a, &entry);
128 if (r == ARCHIVE_EOF)
131 bsdtar_warnc(bsdtar, 0, "%s", archive_error_string(a));
132 if (r == ARCHIVE_RETRY) {
133 /* Retryable error: try again */
134 bsdtar_warnc(bsdtar, 0, "Retrying...");
137 if (r != ARCHIVE_OK) {
138 bsdtar->return_value = 1;
143 * Exclude entries that are too old.
145 st = archive_entry_stat(entry);
146 if (bsdtar->newer_ctime_sec > 0) {
147 if (st->st_ctime < bsdtar->newer_ctime_sec)
148 continue; /* Too old, skip it. */
149 if (st->st_ctime == bsdtar->newer_ctime_sec
150 && ARCHIVE_STAT_CTIME_NANOS(st)
151 <= bsdtar->newer_ctime_nsec)
152 continue; /* Too old, skip it. */
154 if (bsdtar->newer_mtime_sec > 0) {
155 if (st->st_mtime < bsdtar->newer_mtime_sec)
156 continue; /* Too old, skip it. */
157 if (st->st_mtime == bsdtar->newer_mtime_sec
158 && ARCHIVE_STAT_MTIME_NANOS(st)
159 <= bsdtar->newer_mtime_nsec)
160 continue; /* Too old, skip it. */
164 * Note that pattern exclusions are checked before
165 * pathname rewrites are handled. This gives more
166 * control over exclusions, since rewrites always lose
167 * information. (For example, consider a rewrite
168 * s/foo[0-9]/foo/. If we check exclusions after the
169 * rewrite, there would be no way to exclude foo1/bar
170 * while allowing foo2/bar.)
172 if (excluded(bsdtar, archive_entry_pathname(entry)))
173 continue; /* Excluded by a pattern test. */
176 * Modify the pathname as requested by the user. We
177 * do this for -t as well to give users a way to
178 * preview the effects of their rewrites. We also do
179 * this before extraction security checks (including
180 * leading '/' removal). Note that some rewrite
181 * failures prevent extraction.
183 if (edit_pathname(bsdtar, entry))
184 continue; /* Excluded by a rewrite failure. */
187 /* Perversely, gtar uses -O to mean "send to stderr"
188 * when used with -t. */
189 out = bsdtar->option_stdout ? stderr : stdout;
191 if (bsdtar->verbose < 2)
192 safe_fprintf(out, "%s",
193 archive_entry_pathname(entry));
195 list_item_verbose(bsdtar, out, entry);
197 r = archive_read_data_skip(a);
198 if (r == ARCHIVE_WARN) {
200 bsdtar_warnc(bsdtar, 0, "%s",
201 archive_error_string(a));
203 if (r == ARCHIVE_RETRY) {
205 bsdtar_warnc(bsdtar, 0, "%s",
206 archive_error_string(a));
208 if (r == ARCHIVE_FATAL) {
210 bsdtar_warnc(bsdtar, 0, "%s",
211 archive_error_string(a));
216 if (bsdtar->option_interactive &&
217 !yes("extract '%s'", archive_entry_pathname(entry)))
221 * Format here is from SUSv2, including the
224 if (bsdtar->verbose) {
225 safe_fprintf(stderr, "x %s",
226 archive_entry_pathname(entry));
229 if (bsdtar->option_stdout)
230 r = archive_read_data_into_fd(a, 1);
232 r = archive_read_extract(a, entry,
233 bsdtar->extract_flags);
234 if (r != ARCHIVE_OK) {
235 if (!bsdtar->verbose)
236 safe_fprintf(stderr, "%s",
237 archive_entry_pathname(entry));
238 safe_fprintf(stderr, ": %s",
239 archive_error_string(a));
240 if (!bsdtar->verbose)
241 fprintf(stderr, "\n");
242 bsdtar->return_value = 1;
245 fprintf(stderr, "\n");
246 if (r == ARCHIVE_FATAL)
251 if (bsdtar->verbose > 2)
252 fprintf(stdout, "Archive Format: %s, Compression: %s\n",
253 archive_format_name(a), archive_compression_name(a));
255 archive_read_finish(a);
260 * Display information about the current file.
262 * The format here roughly duplicates the output of 'ls -l'.
263 * This is based on SUSv2, where 'tar tv' is documented as
264 * listing additional information in an "unspecified format,"
265 * and 'pax -l' is documented as using the same format as 'ls -l'.
268 list_item_verbose(struct bsdtar *bsdtar, FILE *out, struct archive_entry *entry)
270 const struct stat *st;
278 st = archive_entry_stat(entry);
281 * We avoid collecting the entire list in memory at once by
282 * listing things as we see them. However, that also means we can't
283 * just pre-compute the field widths. Instead, we start with guesses
284 * and just widen them as necessary. These numbers are completely
287 if (!bsdtar->u_width) {
289 bsdtar->gs_width = 13;
293 bsdtar_strmode(entry, tmp);
294 fprintf(out, "%s %d ", tmp, (int)(st->st_nlink));
296 /* Use uname if it's present, else uid. */
297 p = archive_entry_uname(entry);
298 if ((p == NULL) || (*p == '\0')) {
299 sprintf(tmp, "%lu ", (unsigned long)st->st_uid);
303 if (w > bsdtar->u_width)
305 fprintf(out, "%-*s ", (int)bsdtar->u_width, p);
307 /* Use gname if it's present, else gid. */
308 p = archive_entry_gname(entry);
309 if (p != NULL && p[0] != '\0') {
310 fprintf(out, "%s", p);
313 sprintf(tmp, "%lu", (unsigned long)st->st_gid);
315 fprintf(out, "%s", tmp);
319 * Print device number or file size, right-aligned so as to make
320 * total width of group and devnum/filesize fields be gs_width.
321 * If gs_width is too small, grow it.
323 if (S_ISCHR(st->st_mode) || S_ISBLK(st->st_mode)) {
324 sprintf(tmp, "%lu,%lu",
325 (unsigned long)major(st->st_rdev),
326 (unsigned long)minor(st->st_rdev)); /* ls(1) also casts here. */
329 * Note the use of platform-dependent macros to format
330 * the filesize here. We need the format string and the
331 * corresponding type for the cast.
333 sprintf(tmp, BSDTAR_FILESIZE_PRINTF,
334 (BSDTAR_FILESIZE_TYPE)st->st_size);
336 if (w + strlen(tmp) >= bsdtar->gs_width)
337 bsdtar->gs_width = w+strlen(tmp)+1;
338 fprintf(out, "%*s", (int)(bsdtar->gs_width - w), tmp);
340 /* Format the time using 'ls -l' conventions. */
341 tim = (time_t)st->st_mtime;
342 if (abs(tim - now) > (365/2)*86400)
343 fmt = bsdtar->day_first ? "%e %b %Y" : "%b %e %Y";
345 fmt = bsdtar->day_first ? "%e %b %R" : "%b %e %R";
346 strftime(tmp, sizeof(tmp), fmt, localtime(&tim));
347 fprintf(out, " %s ", tmp);
348 safe_fprintf(out, "%s", archive_entry_pathname(entry));
350 /* Extra information for links. */
351 if (archive_entry_hardlink(entry)) /* Hard link */
352 safe_fprintf(out, " link to %s",
353 archive_entry_hardlink(entry));
354 else if (S_ISLNK(st->st_mode)) /* Symbolic link */
355 safe_fprintf(out, " -> %s", archive_entry_symlink(entry));