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 1.29 2007/04/07 05:56:40 kientzle Exp $");
29 #ifdef HAVE_SYS_TYPES_H
30 #include <sys/types.h>
33 #include <sys/mkdev.h>
35 #ifdef HAVE_SYS_PARAM_H
36 #include <sys/param.h>
38 #ifdef HAVE_SYS_STAT_H
70 static void list_item_verbose(struct bsdtar
*, FILE *,
71 struct archive_entry
*);
72 static void read_archive(struct bsdtar
*bsdtar
, char mode
);
75 tar_mode_t(struct bsdtar
*bsdtar
)
77 read_archive(bsdtar
, 't');
81 tar_mode_x(struct bsdtar
*bsdtar
)
83 read_archive(bsdtar
, 'x');
87 * Handle 'x' and 't' modes.
90 read_archive(struct bsdtar
*bsdtar
, char mode
)
94 struct archive_entry
*entry
;
95 const struct stat
*st
;
98 while (*bsdtar
->argv
) {
99 include(bsdtar
, *bsdtar
->argv
);
103 if (bsdtar
->names_from_file
!= NULL
)
104 include_from_file(bsdtar
, bsdtar
->names_from_file
);
106 a
= archive_read_new();
107 archive_read_support_compression_all(a
);
108 archive_read_support_format_all(a
);
109 if (archive_read_open_file(a
, bsdtar
->filename
,
110 bsdtar
->bytes_per_block
!= 0 ? bsdtar
->bytes_per_block
:
111 DEFAULT_BYTES_PER_BLOCK
))
112 bsdtar_errc(bsdtar
, 1, 0, "Error opening archive: %s",
113 archive_error_string(a
));
117 /* Support --fast-read option */
118 if (bsdtar
->option_fast_read
&&
119 unmatched_inclusions(bsdtar
) == 0)
122 r
= archive_read_next_header(a
, &entry
);
123 if (r
== ARCHIVE_EOF
)
126 bsdtar_warnc(bsdtar
, 0, "%s", archive_error_string(a
));
127 if (r
== ARCHIVE_RETRY
) {
128 /* Retryable error: try again */
129 bsdtar_warnc(bsdtar
, 0, "Retrying...");
132 if (r
!= ARCHIVE_OK
) {
133 bsdtar
->return_value
= 1;
138 * Exclude entries that are too old.
140 st
= archive_entry_stat(entry
);
141 if (bsdtar
->newer_ctime_sec
> 0) {
142 if (st
->st_ctime
< bsdtar
->newer_ctime_sec
)
143 continue; /* Too old, skip it. */
144 if (st
->st_ctime
== bsdtar
->newer_ctime_sec
145 && ARCHIVE_STAT_CTIME_NANOS(st
)
146 <= bsdtar
->newer_ctime_nsec
)
147 continue; /* Too old, skip it. */
149 if (bsdtar
->newer_mtime_sec
> 0) {
150 if (st
->st_mtime
< bsdtar
->newer_mtime_sec
)
151 continue; /* Too old, skip it. */
152 if (st
->st_mtime
== bsdtar
->newer_mtime_sec
153 && ARCHIVE_STAT_MTIME_NANOS(st
)
154 <= bsdtar
->newer_mtime_nsec
)
155 continue; /* Too old, skip it. */
159 * Note that pattern exclusions are checked before
160 * pathname rewrites are handled. This gives more
161 * control over exclusions, since rewrites always lose
162 * information. (For example, consider a rewrite
163 * s/foo[0-9]/foo/. If we check exclusions after the
164 * rewrite, there would be no way to exclude foo1/bar
165 * while allowing foo2/bar.)
167 if (excluded(bsdtar
, archive_entry_pathname(entry
)))
168 continue; /* Excluded by a pattern test. */
171 * Modify the pathname as requested by the user. We
172 * do this for -t as well to give users a way to
173 * preview the effects of their rewrites. We also do
174 * this before extraction security checks (including
175 * leading '/' removal). Note that some rewrite
176 * failures prevent extraction.
178 if (edit_pathname(bsdtar
, entry
))
179 continue; /* Excluded by a rewrite failure. */
182 /* Perversely, gtar uses -O to mean "send to stderr"
183 * when used with -t. */
184 out
= bsdtar
->option_stdout
? stderr
: stdout
;
186 if (bsdtar
->verbose
< 2)
187 safe_fprintf(out
, "%s",
188 archive_entry_pathname(entry
));
190 list_item_verbose(bsdtar
, out
, entry
);
192 r
= archive_read_data_skip(a
);
193 if (r
== ARCHIVE_WARN
) {
195 bsdtar_warnc(bsdtar
, 0, "%s",
196 archive_error_string(a
));
198 if (r
== ARCHIVE_RETRY
) {
200 bsdtar_warnc(bsdtar
, 0, "%s",
201 archive_error_string(a
));
203 if (r
== ARCHIVE_FATAL
) {
205 bsdtar_warnc(bsdtar
, 0, "%s",
206 archive_error_string(a
));
211 if (bsdtar
->option_interactive
&&
212 !yes("extract '%s'", archive_entry_pathname(entry
)))
216 * Format here is from SUSv2, including the
219 if (bsdtar
->verbose
) {
220 safe_fprintf(stderr
, "x %s",
221 archive_entry_pathname(entry
));
224 if (bsdtar
->option_stdout
) {
225 /* TODO: Catch/recover any errors here. */
226 archive_read_data_into_fd(a
, 1);
227 } else if (archive_read_extract(a
, entry
,
228 bsdtar
->extract_flags
)) {
229 if (!bsdtar
->verbose
)
230 safe_fprintf(stderr
, "%s",
231 archive_entry_pathname(entry
));
232 safe_fprintf(stderr
, ": %s",
233 archive_error_string(a
));
234 if (!bsdtar
->verbose
)
235 fprintf(stderr
, "\n");
237 * TODO: Decide how to handle
238 * extraction error... <sigh>
240 bsdtar
->return_value
= 1;
243 fprintf(stderr
, "\n");
247 if (bsdtar
->verbose
> 2)
248 fprintf(stdout
, "Archive Format: %s, Compression: %s\n",
249 archive_format_name(a
), archive_compression_name(a
));
251 archive_read_finish(a
);
256 * Display information about the current file.
258 * The format here roughly duplicates the output of 'ls -l'.
259 * This is based on SUSv2, where 'tar tv' is documented as
260 * listing additional information in an "unspecified format,"
261 * and 'pax -l' is documented as using the same format as 'ls -l'.
264 list_item_verbose(struct bsdtar
*bsdtar
, FILE *out
, struct archive_entry
*entry
)
266 const struct stat
*st
;
274 st
= archive_entry_stat(entry
);
277 * We avoid collecting the entire list in memory at once by
278 * listing things as we see them. However, that also means we can't
279 * just pre-compute the field widths. Instead, we start with guesses
280 * and just widen them as necessary. These numbers are completely
283 if (!bsdtar
->u_width
) {
285 bsdtar
->gs_width
= 13;
289 bsdtar_strmode(entry
, tmp
);
290 fprintf(out
, "%s %d ", tmp
, (int)(st
->st_nlink
));
292 /* Use uname if it's present, else uid. */
293 p
= archive_entry_uname(entry
);
294 if ((p
== NULL
) || (*p
== '\0')) {
295 sprintf(tmp
, "%d ", st
->st_uid
);
299 if (w
> bsdtar
->u_width
)
301 fprintf(out
, "%-*s ", (int)bsdtar
->u_width
, p
);
303 /* Use gname if it's present, else gid. */
304 p
= archive_entry_gname(entry
);
305 if (p
!= NULL
&& p
[0] != '\0') {
306 fprintf(out
, "%s", p
);
309 sprintf(tmp
, "%d", st
->st_gid
);
311 fprintf(out
, "%s", tmp
);
315 * Print device number or file size, right-aligned so as to make
316 * total width of group and devnum/filesize fields be gs_width.
317 * If gs_width is too small, grow it.
319 if (S_ISCHR(st
->st_mode
) || S_ISBLK(st
->st_mode
)) {
320 sprintf(tmp
, "%d,%u",
322 (unsigned)minor(st
->st_rdev
)); /* ls(1) also casts here. */
325 * Note the use of platform-dependent macros to format
326 * the filesize here. We need the format string and the
327 * corresponding type for the cast.
329 sprintf(tmp
, BSDTAR_FILESIZE_PRINTF
,
330 (BSDTAR_FILESIZE_TYPE
)st
->st_size
);
332 if (w
+ strlen(tmp
) >= bsdtar
->gs_width
)
333 bsdtar
->gs_width
= w
+strlen(tmp
)+1;
334 fprintf(out
, "%*s", (int)(bsdtar
->gs_width
- w
), tmp
);
336 /* Format the time using 'ls -l' conventions. */
337 tim
= (time_t)st
->st_mtime
;
338 if (abs(tim
- now
) > (365/2)*86400)
339 fmt
= bsdtar
->day_first
? "%e %b %Y" : "%b %e %Y";
341 fmt
= bsdtar
->day_first
? "%e %b %R" : "%b %e %R";
342 strftime(tmp
, sizeof(tmp
), fmt
, localtime(&tim
));
343 fprintf(out
, " %s ", tmp
);
344 safe_fprintf(out
, "%s", archive_entry_pathname(entry
));
346 /* Extra information for links. */
347 if (archive_entry_hardlink(entry
)) /* Hard link */
348 safe_fprintf(out
, " link to %s",
349 archive_entry_hardlink(entry
));
350 else if (S_ISLNK(st
->st_mode
)) /* Symbolic link */
351 safe_fprintf(out
, " -> %s", archive_entry_symlink(entry
));