with this program; if not, write to the Free Software Foundation, Inc.,
59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
-#include "system.h"
+#include <system.h>
#if HAVE_UTIME_H
# include <utime.h>
return header;
}
+#define FILL(field,byte) do { \
+ memset(field, byte, sizeof(field)-1); \
+ (field)[sizeof(field)-1] = 0; \
+} while (0)
+
/* Write a GNUTYPE_LONGLINK or GNUTYPE_LONGNAME block. */
static void
write_gnu_long_link (struct tar_stat_info *st, const char *p, char type)
size_t size = strlen (p) + 1;
size_t bufsize;
union block *header;
-
+ char *tmpname;
+
header = start_private_header ("././@LongLink", size);
+ FILL(header->header.mtime, '0');
+ FILL(header->header.mode, '0');
+ FILL(header->header.uid, '0');
+ FILL(header->header.gid, '0');
+ FILL(header->header.devmajor, 0);
+ FILL(header->header.devminor, 0);
+ uid_to_uname (0, &tmpname);
+ UNAME_TO_CHARS (tmpname, header->header.uname);
+ free (tmpname);
+ gid_to_gname (0, &tmpname);
+ GNAME_TO_CHARS (tmpname, header->header.gname);
+ free (tmpname);
+
strcpy (header->header.magic, OLDGNU_MAGIC);
header->header.typeflag = type;
finish_header (st, header, -1);
else
MAJOR_TO_CHARS (st->devminor, header->header.devminor);
}
- else
+ else if (archive_format != GNU_FORMAT && archive_format != OLDGNU_FORMAT)
{
MAJOR_TO_CHARS (0, header->header.devmajor);
MINOR_TO_CHARS (0, header->header.devminor);
}
}
+/* Look in directory DIRNAME for a cache directory tag file
+ with the magic name "CACHEDIR.TAG" and a standard header,
+ as described at:
+ http://www.brynosaurus.com/cachedir
+ Applications can write this file into directories they create
+ for use as caches containing purely regenerable, non-precious data,
+ allowing us to avoid archiving them if --exclude-caches is specified. */
+
+#define CACHEDIR_SIGNATURE "Signature: 8a477f597d28d172789f06886806bc55"
+#define CACHEDIR_SIGNATURE_SIZE (sizeof CACHEDIR_SIGNATURE - 1)
+
+static bool
+check_cache_directory (char *dirname)
+{
+ static char tagname[] = "CACHEDIR.TAG";
+ char *tagpath;
+ int fd;
+ int tag_present = false;
+
+ tagpath = xmalloc (strlen (dirname) + strlen (tagname) + 1);
+ strcpy (tagpath, dirname);
+ strcat (tagpath, tagname);
+
+ fd = open (tagpath, O_RDONLY);
+ if (fd >= 0)
+ {
+ static char tagbuf[CACHEDIR_SIGNATURE_SIZE];
+
+ if (read (fd, tagbuf, CACHEDIR_SIGNATURE_SIZE)
+ == CACHEDIR_SIGNATURE_SIZE
+ && memcmp (tagbuf, CACHEDIR_SIGNATURE, CACHEDIR_SIGNATURE_SIZE) == 0)
+ tag_present = true;
+
+ close (fd);
+ }
+
+ free (tagpath);
+
+ return tag_present;
+}
+
static void
dump_dir0 (char *directory,
struct tar_stat_info *st, int top_level, dev_t parent_device)
return;
}
+ if (exclude_caches_option
+ && check_cache_directory(st->orig_file_name))
+ {
+ if (verbose_option)
+ WARN ((0, 0,
+ _("%s: contains a cache directory tag; not dumped"),
+ quotearg_colon (st->orig_file_name)));
+ return;
+ }
+
{
char const *entry;
size_t entry_len;
#endif
/* See if we want only new files, and check if this one is too old to
- put in the archive. */
+ put in the archive.
+
+ This check is omitted if incremental_option is set *and* the
+ requested file is not explicitely listed in the command line. */
- if (!S_ISDIR (st->stat.st_mode)
+ if (!(incremental_option && !is_individual_file (p))
+ && !S_ISDIR (st->stat.st_mode)
&& OLDER_STAT_TIME (st->stat, m)
&& (!after_date_option || OLDER_STAT_TIME (st->stat, c)))
{
- if (0 < top_level) /* equivalent to !incremental_option */
+ if (!incremental_option)
WARN ((0, 0, _("%s: file is unchanged; not dumped"),
quotearg_colon (p)));
- /* FIXME: recheck this return. */
return;
}