Fix extraction from concatenated incremental archives with renamed directories.

Complements 15c02c2b.

* src/extract.c (delayed_set_stat): Change type of file_name.
(delay_set_stat): Allocate file_name member.
(free_delayed_set_stat): Free file_name.
(fixup_delayed_set_stat): New function.
(rename_directory): Call fixup_delayed_set_stat on success.

* tests/incr11.at: New testcase.
* tests/incr10.at: Improve description.
* tests/Makefile.am: Add incr11.at
* tests/testsuite.at: Add incr11.at

src/extract.c

@@ -109,7 +109,7 @@ struct delayed_set_stat
     struct xattr_array *xattr_map;
     /* Length and contents of name.  */
     size_t file_name_len;
-    char file_name[1];
+    char *file_name;
   };
 
 static struct delayed_set_stat *delayed_set_stat_head;
@@ -441,9 +441,7 @@ delay_set_stat (char const *file_name, struct tar_stat_info const *st,
 		mode_t mode, int atflag)
 {
   size_t file_name_len = strlen (file_name);
-  struct delayed_set_stat *data =
-    xmalloc (offsetof (struct delayed_set_stat, file_name)
-	     + file_name_len + 1);
+  struct delayed_set_stat *data = xmalloc (sizeof (*data));
   data->next = delayed_set_stat_head;
   data->mode = mode;
   if (st)
@@ -456,6 +454,7 @@ delay_set_stat (char const *file_name, struct tar_stat_info const *st,
       data->mtime = st->mtime;
     }
   data->file_name_len = file_name_len;
+  data->file_name = xstrdup (file_name);
   data->current_mode = current_mode;
   data->current_mode_mask = current_mode_mask;
   data->interdir = ! st;
@@ -540,6 +539,7 @@ repair_delayed_set_stat (char const *dir,
 static void
 free_delayed_set_stat (struct delayed_set_stat *data)
 {
+  free (data->file_name);
   xheader_xattr_free (data->xattr_map, data->xattr_map_size);
   free (data->cntx_name);
   free (data->acls_a_ptr);
@@ -569,6 +569,23 @@ remove_delayed_set_stat (const char *fname)
     }
 }
 
+static void
+fixup_delayed_set_stat (char const *src, char const *dst)
+{
+  struct delayed_set_stat *data;
+  for (data = delayed_set_stat_head; data; data = data->next)
+    {
+      if (chdir_current == data->change_dir
+	  && strcmp (data->file_name, src) == 0)
+	{
+	  free (data->file_name);
+	  data->file_name = xstrdup (dst);
+	  data->file_name_len = strlen (dst);
+	  return;
+	}
+    }
+}
+
 /* After a file/link/directory creation has failed, see if
    it's because some required directory was not present, and if so,
    create all required directories.  Return zero if all the required
@@ -1769,7 +1786,9 @@ extract_finish (void)
 bool
 rename_directory (char *src, char *dst)
 {
-  if (renameat (chdir_fd, src, chdir_fd, dst) != 0)
+  if (renameat (chdir_fd, src, chdir_fd, dst) == 0)
+    fixup_delayed_set_stat (src, dst);
+  else
     {
       int e = errno;
       bool interdir_made;

tests/Makefile.am

@@ -118,6 +118,7 @@ TESTSUITE_AT = \
  incr08.at\
  incr09.at\
  incr10.at\
+ incr11.at\
  indexfile.at\
  ignfail.at\
  iotty.at\

tests/incr10.at

@@ -15,7 +15,7 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 
-AT_SETUP([concatenated incremental archives])
+AT_SETUP([concatenated incremental archives (deletes)])
 AT_KEYWORDS([incremental concat cat incr10])
 
 # Description: Extraction from concatenated incremental archives

tests/incr11.at

@@ -0,0 +1,75 @@
+# Process this file with autom4te to create testsuite. -*- Autotest -*-
+# Test suite for GNU tar.
+# Copyright 2015 Free Software Foundation, Inc.
+#
+# 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.
+#
+# 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, see <http://www.gnu.org/licenses/>.
+
+# Description: Extraction from concatenated incremental archives
+# produced spurious error messages when trying to set file ownership
+# and permissions on renamed directories
+# Reported by: Alex Efros <powerman@powerman.name>
+# References: <20151129094003.GD18347@home.power>
+#             http://lists.gnu.org/archive/html/bug-tar/2015-11/msg00033.html
+
+AT_SETUP([concatenated incremental archives (renames)])
+AT_KEYWORDS([incremental concat cat incr11])
+
+AT_TAR_CHECK([
+AT_SORT_PREREQ
+AT_TAR_MKHIER([data/dir],[file])
+decho Level 0
+tar -cvf full.tar -g snap -C data .
+decho Level 1
+mv data/dir data/dir2
+tar -cvf incr.tar -g snap -C data .
+decho Concat
+cp full.tar full2.tar
+tar -A -f full2.tar incr.tar
+decho Extract
+mkdir out
+tar -xvf full2.tar -g /dev/null -C out
+decho List
+find out | sort
+],
+[0],
+[Level 0
+./
+./dir/
+./dir/file
+Level 1
+./
+./dir2/
+Concat
+Extract
+./
+./dir/
+./dir/file
+./
+./dir2/
+List
+out
+out/dir2
+out/dir2/file
+],
+[Level 0
+tar: .: Directory is new
+tar: ./dir: Directory is new
+Level 1
+tar: ./dir2: Directory has been renamed from './dir'
+Concat
+Extract
+List
+],[],[],[gnu])
+
+AT_CLEANUP

tests/testsuite.at

@@ -305,6 +305,7 @@ m4_include([incr07.at])
 m4_include([incr08.at])
 m4_include([incr09.at])
 m4_include([incr10.at])
+m4_include([incr11.at])
 
 AT_BANNER([Files removed while archiving])
 m4_include([filerem01.at])