Fix handling of hard link targets by -c --transform

* src/create.c (file_count_links): Transform link target
before the look up.
* tests/xform-h.at: New test case.
* tests/Makefile.am (TESTSUITE_AT): Add xform-h.at.
* tests/testsuite.at: Add xform-h.at

src/create.c

@@ -1427,19 +1427,26 @@ file_count_links (struct tar_stat_info *st)
   if (st->stat.st_nlink > 1)
     {
       struct link *duplicate;
-      struct link *lp = xmalloc (offsetof (struct link, name)
-				 + strlen (st->orig_file_name) + 1);
+      char *linkname = NULL;
+      struct link *lp;
+
+      assign_string (&linkname, st->orig_file_name);
+      transform_name (&linkname, XFORM_LINK);
+      
+      lp = xmalloc (offsetof (struct link, name)
+				 + strlen (linkname) + 1);
       lp->ino = st->stat.st_ino;
       lp->dev = st->stat.st_dev;
       lp->nlink = st->stat.st_nlink;
-      strcpy (lp->name, st->orig_file_name);
-
+      strcpy (lp->name, linkname);
+      free (linkname);
+      
       if (! ((link_table
 	      || (link_table = hash_initialize (0, 0, hash_link,
 						compare_links, 0)))
 	     && (duplicate = hash_insert (link_table, lp))))
 	xalloc_die ();
-
+      
       if (duplicate != lp)
 	abort ();
       lp->nlink--;

tests/Makefile.am

@@ -119,6 +119,7 @@ TESTSUITE_AT = \
  volume.at\
  verbose.at\
  version.at\
+ xform-h.at\
  star/gtarfail.at\
  star/gtarfail2.at\
  star/multi-fail.at\

tests/testsuite.at

@@ -122,6 +122,8 @@ m4_include([append.at])
 m4_include([append01.at])
 m4_include([append02.at])
 
+m4_include([xform-h.at])
+
 m4_include([exclude.at])
 
 m4_include([delete01.at])

tests/xform-h.at

@@ -0,0 +1,59 @@
+# Process this file with autom4te to create testsuite. -*- Autotest -*-
+
+# Test suite for GNU tar.
+# Copyright (C) 2009 Free Software Foundation, Inc.
+
+# 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 3, 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.
+
+# 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.
+
+# When creating archives, tar 1.22 did not apply the --transform option
+# to hard links.
+#
+# Reported by: Jose Miguel Goncalves <jose.goncalves@inov.pt>
+# References:
+#   <4A436D1D.4040408@inov.pt>
+#   http://lists.gnu.org/archive/html/bug-tar/2009-06/msg00017.html
+#
+
+AT_SETUP([transforming hard links on create])
+AT_KEYWORDS([transform xform xform-h])
+
+m4_define([xform],[
+echo "$1"
+tar cf archive --transform="s,^basedir/,,$2" basedir
+tar tvf archive | sed -n 's/.*test_link link to //p'
+])
+
+AT_TAR_CHECK([
+mkdir basedir
+echo "hello" > basedir/test
+ln basedir/test basedir/test_link
+
+xform(Default transform scope)
+xform(Transforming hard links,h)
+xform(Not transforming hard links,H)
+],
+[0],
+[Default transform scope
+test
+Transforming hard links
+test
+Not transforming hard links
+basedir/test
+])
+
+AT_CLEANUP
+
+# End of xform-h.at