+ mv_end ();
+
+ stat_info->dumpdir = archive_dir;
+ stat_info->skipped = true; /* For skip_member() and friends
+ to work correctly */
+}
+
+/* Return T if STAT_INFO represents a dumpdir archive member.
+ Note: can invalidate current_header. It happens if flush_archive()
+ gets called within get_gnu_dumpdir() */
+bool
+is_dumpdir (struct tar_stat_info *stat_info)
+{
+ if (stat_info->is_dumpdir && !stat_info->dumpdir)
+ get_gnu_dumpdir (stat_info);
+ return stat_info->is_dumpdir;
+}
+
+static bool
+dumpdir_ok (char *dumpdir)
+{
+ char *p;
+ int has_tempdir = 0;
+ int expect = 0;
+
+ for (p = dumpdir; *p; p += strlen (p) + 1)
+ {
+ if (expect && *p != expect)
+ {
+ ERROR ((0, 0,
+ _("Malformed dumpdir: expected '%c' but found %#3o"),
+ expect, *p));
+ return false;
+ }
+ switch (*p)
+ {
+ case 'X':
+ if (has_tempdir)
+ {
+ ERROR ((0, 0,
+ _("Malformed dumpdir: 'X' duplicated")));
+ return false;
+ }
+ else
+ has_tempdir = 1;
+ break;
+
+ case 'R':
+ if (p[1] == 0)
+ {
+ if (!has_tempdir)
+ {
+ ERROR ((0, 0,
+ _("Malformed dumpdir: empty name in 'R'")));
+ return false;
+ }
+ else
+ has_tempdir = 0;
+ }
+ expect = 'T';
+ break;
+
+ case 'T':
+ if (expect != 'T')
+ {
+ ERROR ((0, 0,
+ _("Malformed dumpdir: 'T' not preceeded by 'R'")));
+ return false;
+ }
+ if (p[1] == 0 && !has_tempdir)
+ {
+ ERROR ((0, 0,
+ _("Malformed dumpdir: empty name in 'T'")));
+ return false;
+ }
+ expect = 0;
+ break;
+
+ case 'N':
+ case 'Y':
+ case 'D':
+ break;
+
+ default:
+ /* FIXME: bail out? */
+ break;
+ }
+ }
+
+ if (expect)
+ {
+ ERROR ((0, 0,
+ _("Malformed dumpdir: expected '%c' but found end of data"),
+ expect));
+ return false;
+ }
+
+ if (has_tempdir)
+ WARN ((0, 0, _("Malformed dumpdir: 'X' never used")));
+
+ return true;
+}
+
+/* Examine the directories under directory_name and delete any
+ files that were not there at the time of the back-up. */
+static bool
+try_purge_directory (char const *directory_name)
+{
+ char *current_dir;
+ char *cur, *arc, *p;
+ char *temp_stub = NULL;
+
+ if (!is_dumpdir (¤t_stat_info))
+ return false;
+
+ current_dir = savedir (directory_name);
+
+ if (!current_dir)
+ /* The directory doesn't exist now. It'll be created. In any
+ case, we don't have to delete any files out of it. */
+ return false;
+
+ /* Verify if dump directory is sane */
+ if (!dumpdir_ok (current_stat_info.dumpdir))
+ return false;
+
+ /* Process renames */
+ for (arc = current_stat_info.dumpdir; *arc; arc += strlen (arc) + 1)
+ {
+ if (*arc == 'X')
+ {
+#define TEMP_DIR_TEMPLATE "tar.XXXXXX"
+ size_t len = strlen (arc + 1);
+ temp_stub = xrealloc (temp_stub, len + 1 + sizeof TEMP_DIR_TEMPLATE);
+ memcpy (temp_stub, arc + 1, len);
+ temp_stub[len] = '/';
+ memcpy (temp_stub + len + 1, TEMP_DIR_TEMPLATE,
+ sizeof TEMP_DIR_TEMPLATE);
+ if (!mkdtemp (temp_stub))
+ {
+ ERROR ((0, errno,
+ _("Cannot create temporary directory using template %s"),
+ quote (temp_stub)));
+ free (temp_stub);
+ free (current_dir);
+ return false;
+ }
+ }
+ else if (*arc == 'R')
+ {
+ char *src, *dst;
+ src = arc + 1;
+ arc += strlen (arc) + 1;
+ dst = arc + 1;
+
+ if (*src == 0)
+ src = temp_stub;
+ else if (*dst == 0)
+ dst = temp_stub;
+
+ if (!rename_directory (src, dst))
+ {
+ free (temp_stub);
+ free (current_dir);
+ /* FIXME: Make sure purge_directory(dst) will return
+ immediately */
+ return false;
+ }
+ }
+ }
+
+ free (temp_stub);
+
+ /* Process deletes */
+ p = NULL;
projects / chaz / tar / blobdiff