/* Diff files from a tar archive.
- Copyright (C) 1988, 1992, 1993, 1994, 1996, 1997, 1999, 2000, 2001,
- 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
+ Copyright 1988, 1992-1994, 1996-1997, 1999-2001, 2003-2007,
+ 2009-2010, 2012-2014 Free Software Foundation, Inc.
- Written by John Gilmore, on 1987-04-30.
+ This file is part of GNU tar.
- This program is free software; you can redistribute it and/or modify it
- under the terms of the GNU General Public License as published by the
- Free Software Foundation; either version 2, or (at your option) any later
- version.
+ GNU tar is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
- This program is distributed in the hope that it will be useful, but
- WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General
- Public License for more details.
+ GNU tar is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
- You should have received a copy of the GNU General Public License along
- with this program; if not, write to the Free Software Foundation, Inc.,
- 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>.
+
+ Written by John Gilmore, on 1987-04-30. */
#include <system.h>
#include <system-ioctl.h>
/* Sigh about something that differs by writing a MESSAGE to stdlis,
given MESSAGE is nonzero. Also set the exit status if not already. */
void
-report_difference (struct tar_stat_info *st __attribute__ ((unused)),
- const char *fmt, ...)
+report_difference (struct tar_stat_info *st, const char *fmt, ...)
{
if (fmt)
{
va_list ap;
- fprintf (stdlis, "%s: ", quotearg_colon (current_stat_info.file_name));
+ fprintf (stdlis, "%s: ", quotearg_colon (st->file_name));
va_start (ap, fmt);
vfprintf (stdlis, fmt, ap);
va_end (ap);
fprintf (stdlis, "\n");
}
- if (exit_status == TAREXIT_SUCCESS)
- exit_status = TAREXIT_DIFFERS;
+ set_exit_status (TAREXIT_DIFFERS);
}
/* Take a buffer returned by read_and_process and do nothing with it. */
static int
process_rawdata (size_t bytes, char *buffer)
{
- size_t status = safe_read (diff_handle, diff_buffer, bytes);
+ size_t status = blocking_read (diff_handle, diff_buffer, bytes);
if (status != bytes)
{
return 1;
}
-/* Directory contents, only for GNUTYPE_DUMPDIR. */
-
-static char *dumpdir_cursor;
-
-static int
-process_dumpdir (size_t bytes, char *buffer)
-{
- if (memcmp (buffer, dumpdir_cursor, bytes))
- {
- report_difference (¤t_stat_info, _("Contents differ"));
- return 0;
- }
-
- dumpdir_cursor += bytes;
- return 1;
-}
-
/* Some other routine wants SIZE bytes in the archive. For each chunk
of the archive, call PROCESSOR with the size of the chunk, and the
address of the chunk it can work with. The PROCESSOR should return
- nonzero for success. It it return error once, continue skipping
+ nonzero for success. Once it returns error, continue skipping
without calling PROCESSOR anymore. */
static void
{
union block *data_block;
size_t data_size;
- size_t size = st->stat.st_size;
+ off_t size = st->stat.st_size;
- mv_begin (st);
+ mv_begin_read (st);
while (size)
{
data_block = find_next_block ();
static int
get_stat_data (char const *file_name, struct stat *stat_data)
{
- int status = deref_stat (dereference_option, file_name, stat_data);
+ int status = deref_stat (file_name, stat_data);
if (status != 0)
{
}
else
{
- int atime_flag =
- (atime_preserve_option == system_atime_preserve
- ? O_NOATIME
- : 0);
-
- diff_handle = open (file_name, O_RDONLY | O_BINARY | atime_flag);
+ diff_handle = openat (chdir_fd, file_name, open_read_flags);
if (diff_handle < 0)
{
else
read_and_process (¤t_stat_info, process_rawdata);
- if (atime_preserve_option == replace_atime_preserve)
+ if (atime_preserve_option == replace_atime_preserve
+ && stat_data.st_size != 0)
{
- struct timespec ts[2];
- ts[0] = get_stat_atime (&stat_data);
- ts[1] = get_stat_mtime (&stat_data);
- if (set_file_atime (diff_handle, file_name, ts) != 0)
+ struct timespec atime = get_stat_atime (&stat_data);
+ if (set_file_atime (diff_handle, chdir_fd, file_name, atime)
+ != 0)
utime_error (file_name);
}
size_t len = strlen (current_stat_info.link_name);
char *linkbuf = alloca (len + 1);
- int status = readlink (current_stat_info.file_name, linkbuf, len + 1);
+ int status = readlinkat (chdir_fd, current_stat_info.file_name,
+ linkbuf, len + 1);
if (status < 0)
{
report_difference (¤t_stat_info, _("Mode differs"));
}
+static int
+dumpdir_cmp (const char *a, const char *b)
+{
+ size_t len;
+
+ while (*a)
+ switch (*a)
+ {
+ case 'Y':
+ case 'N':
+ if (!strchr ("YN", *b))
+ return 1;
+ if (strcmp(a + 1, b + 1))
+ return 1;
+ len = strlen (a) + 1;
+ a += len;
+ b += len;
+ break;
+
+ case 'D':
+ if (strcmp(a, b))
+ return 1;
+ len = strlen (a) + 1;
+ a += len;
+ b += len;
+ break;
+
+ case 'R':
+ case 'T':
+ case 'X':
+ return *b;
+ }
+ return *b;
+}
+
static void
-diff_dumpdir (void)
+diff_dumpdir (struct tar_stat_info *dir)
{
- char *dumpdir_buffer;
- dev_t dev = 0;
- struct stat stat;
+ const char *dumpdir_buffer;
- if (deref_stat (true, current_stat_info.file_name, &stat))
+ if (dir->fd == 0)
{
- if (errno == ENOENT)
- stat_warn (current_stat_info.file_name);
+ void (*diag) (char const *) = NULL;
+ int fd = subfile_open (dir->parent, dir->orig_file_name, open_read_flags);
+ if (fd < 0)
+ diag = open_diag;
+ else if (fstat (fd, &dir->stat))
+ {
+ diag = stat_diag;
+ close (fd);
+ }
else
- stat_error (current_stat_info.file_name);
+ dir->fd = fd;
+ if (diag)
+ {
+ file_removed_diag (dir->orig_file_name, false, diag);
+ return;
+ }
}
- else
- dev = stat.st_dev;
-
- dumpdir_buffer = get_directory_contents (current_stat_info.file_name, dev);
+ dumpdir_buffer = directory_contents (scan_directory (dir));
if (dumpdir_buffer)
{
- dumpdir_cursor = dumpdir_buffer;
- read_and_process (¤t_stat_info, process_dumpdir);
- free (dumpdir_buffer);
+ if (dumpdir_cmp (dir->dumpdir, dumpdir_buffer))
+ report_difference (dir, _("Contents differ"));
}
else
- read_and_process (¤t_stat_info, process_noop);
+ read_and_process (dir, process_noop);
}
static void
}
offset = OFF_FROM_HEADER (current_header->oldgnu_header.offset);
- if (stat_data.st_size != current_stat_info.stat.st_size + offset)
+ if (offset < 0
+ || INT_ADD_OVERFLOW (current_stat_info.stat.st_size, offset)
+ || stat_data.st_size != current_stat_info.stat.st_size + offset)
{
report_difference (¤t_stat_info, _("Size differs"));
skip_member ();
return;
}
- fd = open (current_stat_info.file_name, O_RDONLY | O_BINARY);
+
+ fd = openat (chdir_fd, current_stat_info.file_name, open_read_flags);
if (fd < 0)
{
{
seek_error_details (current_stat_info.file_name, offset);
report_difference (¤t_stat_info, NULL);
- return;
}
-
- read_and_process (¤t_stat_info, process_rawdata);
+ else
+ read_and_process (¤t_stat_info, process_rawdata);
status = close (fd);
if (status != 0)
{
set_next_block_after (current_header);
- decode_header (current_header, ¤t_stat_info, ¤t_format, 1);
/* Print the block from current_header and current_stat_info. */
{
if (now_verifying)
fprintf (stdlis, _("Verify "));
- print_header (¤t_stat_info, -1);
+ print_header (¤t_stat_info, current_header, -1);
}
switch (current_header->header.typeflag)
{
default:
- ERROR ((0, 0, _("%s: Unknown file type `%c', diffed as normal file"),
+ ERROR ((0, 0, _("%s: Unknown file type '%c', diffed as normal file"),
quotearg_colon (current_stat_info.file_name),
current_header->header.typeflag));
/* Fall through. */
break;
case GNUTYPE_DUMPDIR:
- diff_dumpdir ();
- /* Fall through. */
-
case DIRTYPE:
+ if (is_dumpdir (¤t_stat_info))
+ diff_dumpdir (¤t_stat_info);
diff_dir ();
break;
void
verify_volume (void)
{
+ int may_fail = 0;
if (removed_prefixes_p ())
{
WARN((0, 0,
_("Archive contains file names with leading prefixes removed.")));
+ may_fail = 1;
+ }
+ if (transform_program_p ())
+ {
WARN((0, 0,
- _("Verification may fail to locate original files.")));
+ _("Archive contains transformed file names.")));
+ may_fail = 1;
}
+ if (may_fail)
+ WARN((0, 0,
+ _("Verification may fail to locate original files.")));
+
+ clear_directory_table ();
if (!diff_buffer)
diff_init ();
flush_read ();
while (1)
{
- enum read_header status = read_header (false);
+ enum read_header status = read_header (¤t_header,
+ ¤t_stat_info,
+ read_header_auto);
if (status == HEADER_FAILURE)
{
{
counter++;
set_next_block_after (current_header);
- status = read_header (false);
+ status = read_header (¤t_header, ¤t_stat_info,
+ read_header_auto);
}
while (status == HEADER_FAILURE);
"VERIFY FAILURE: %d invalid headers detected",
counter), counter));
}
- if (status == HEADER_ZERO_BLOCK || status == HEADER_END_OF_FILE)
+ if (status == HEADER_END_OF_FILE)
break;
+ if (status == HEADER_ZERO_BLOCK)
+ {
+ set_next_block_after (current_header);
+ if (!ignore_zeros_option)
+ {
+ char buf[UINTMAX_STRSIZE_BOUND];
+
+ status = read_header (¤t_header, ¤t_stat_info,
+ read_header_auto);
+ if (status == HEADER_ZERO_BLOCK)
+ break;
+ WARNOPT (WARN_ALONE_ZERO_BLOCK,
+ (0, 0, _("A lone zero block at %s"),
+ STRINGIFY_BIGINT (current_block_ordinal (), buf)));
+ }
+ continue;
+ }
+ decode_header (current_header, ¤t_stat_info, ¤t_format, 1);
diff_archive ();
tar_stat_destroy (¤t_stat_info);
- xheader_destroy (&extended_header);
}
access_mode = ACCESS_WRITE;
projects / chaz / tar / blobdiff