/* Diff files from a tar archive.
Copyright (C) 1988, 1992, 1993, 1994, 1996, 1997, 1999, 2000, 2001,
- 2003, 2004, 2005 Free Software Foundation, Inc.
+ 2003, 2004, 2005, 2006, 2007 Free Software Foundation, Inc.
Written by John Gilmore, on 1987-04-30.
51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
#include <system.h>
+#include <system-ioctl.h>
#if HAVE_LINUX_FD_H
# include <linux/fd.h>
#endif
-#include <quotearg.h>
-#include <utimens.h>
-
#include "common.h"
+#include <quotearg.h>
#include <rmt.h>
#include <stdarg.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);
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
-read_and_process (off_t size, int (*processor) (size_t, char *))
+read_and_process (struct tar_stat_info *st, int (*processor) (size_t, char *))
{
union block *data_block;
size_t data_size;
+ off_t size = st->stat.st_size;
- if (multi_volume_option)
- save_sizeleft = size;
+ mv_begin (st);
while (size)
{
data_block = find_next_block ();
set_next_block_after ((union block *)
(data_block->buffer + data_size - 1));
size -= data_size;
- if (multi_volume_option)
- save_sizeleft -= data_size;
+ mv_size_left (size);
}
+ mv_end ();
}
/* Call either stat or lstat over STAT_DATA, depending on
static void
diff_file (void)
{
+ char const *file_name = current_stat_info.file_name;
struct stat stat_data;
- if (!get_stat_data (current_stat_info.file_name, &stat_data))
+ if (!get_stat_data (file_name, &stat_data))
skip_member ();
else if (!S_ISREG (stat_data.st_mode))
{
if (!sys_compare_gid (&stat_data, ¤t_stat_info.stat))
report_difference (¤t_stat_info, _("Gid differs"));
- if (stat_data.st_mtime != current_stat_info.stat.st_mtime)
+ if (tar_timespec_cmp (get_stat_mtime (&stat_data),
+ current_stat_info.mtime))
report_difference (¤t_stat_info, _("Mod time differs"));
- if (current_header->header.typeflag != GNUTYPE_SPARSE &&
- stat_data.st_size != current_stat_info.stat.st_size)
+ if (current_header->header.typeflag != GNUTYPE_SPARSE
+ && stat_data.st_size != current_stat_info.stat.st_size)
{
report_difference (¤t_stat_info, _("Size differs"));
skip_member ();
}
else
{
- diff_handle = open (current_stat_info.file_name, O_RDONLY | O_BINARY);
+ int atime_flag =
+ (atime_preserve_option == system_atime_preserve
+ ? O_NOATIME
+ : 0);
+
+ diff_handle = open (file_name, O_RDONLY | O_BINARY | atime_flag);
if (diff_handle < 0)
{
- open_error (current_stat_info.file_name);
+ open_error (file_name);
skip_member ();
report_difference (¤t_stat_info, NULL);
}
if (current_stat_info.is_sparse)
sparse_diff_file (diff_handle, ¤t_stat_info);
else
- {
- if (multi_volume_option)
- {
- assign_string (&save_name,
- current_stat_info.orig_file_name);
- save_totsize = current_stat_info.stat.st_size;
- /* save_sizeleft is set in read_and_process. */
- }
-
- read_and_process (current_stat_info.stat.st_size,
- process_rawdata);
-
- if (multi_volume_option)
- assign_string (&save_name, 0);
- }
-
- status = close (diff_handle);
- if (status != 0)
- close_error (current_stat_info.file_name);
+ read_and_process (¤t_stat_info, process_rawdata);
- if (atime_preserve_option)
+ if (atime_preserve_option == replace_atime_preserve)
{
struct timespec ts[2];
ts[0] = get_stat_atime (&stat_data);
ts[1] = get_stat_mtime (&stat_data);
- if (utimens (current_stat_info.file_name, ts) != 0)
- utime_error (current_stat_info.file_name);
+ if (set_file_atime (diff_handle, file_name, ts) != 0)
+ utime_error (file_name);
}
+
+ status = close (diff_handle);
+ if (status != 0)
+ close_error (file_name);
}
}
}
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)
{
- char *dumpdir_buffer = get_directory_contents (current_stat_info.file_name,
- 0);
+ char *dumpdir_buffer;
+ dev_t dev = 0;
+ struct stat stat;
- if (multi_volume_option)
+ if (deref_stat (true, current_stat_info.file_name, &stat))
{
- assign_string (&save_name, current_stat_info.orig_file_name);
- save_totsize = current_stat_info.stat.st_size;
- /* save_sizeleft is set in read_and_process. */
+ if (errno == ENOENT)
+ stat_warn (current_stat_info.file_name);
+ else
+ stat_error (current_stat_info.file_name);
}
+ else
+ dev = stat.st_dev;
+
+ dumpdir_buffer = get_directory_contents (current_stat_info.file_name, dev);
if (dumpdir_buffer)
{
- dumpdir_cursor = dumpdir_buffer;
- read_and_process (current_stat_info.stat.st_size, process_dumpdir);
- free (dumpdir_buffer);
+ if (dumpdir_cmp (current_stat_info.dumpdir, dumpdir_buffer))
+ report_difference (¤t_stat_info, _("Contents differ"));
}
else
- read_and_process (current_stat_info.stat.st_size, process_noop);
-
- if (multi_volume_option)
- assign_string (&save_name, 0);
+ read_and_process (¤t_stat_info, process_noop);
}
static void
return;
}
- if (multi_volume_option)
- {
- assign_string (&save_name, current_stat_info.orig_file_name);
- save_totsize = stat_data.st_size;
- /* save_sizeleft is set in read_and_process. */
- }
-
- read_and_process (current_stat_info.stat.st_size, process_rawdata);
-
- if (multi_volume_option)
- assign_string (&save_name, 0);
+ read_and_process (¤t_stat_info, process_rawdata);
status = close (fd);
if (status != 0)
break;
case GNUTYPE_DUMPDIR:
- diff_dumpdir ();
- /* Fall through. */
-
case DIRTYPE:
+ if (is_dumpdir (¤t_stat_info))
+ diff_dumpdir ();
diff_dir ();
break;
diff_archive ();
tar_stat_destroy (¤t_stat_info);
- xheader_destroy (&extended_header);
}
access_mode = ACCESS_WRITE;
projects / chaz / tar / blobdiff