Diagnose unsupported uses of `backname' helper function.

* automake.in (backname): Error out if the path points outside
the directory it started in.

Signed-off-by: Ralf Wildenhues <Ralf.Wildenhues@gmx.de>

diff --git a/ChangeLog b/ChangeLog
index 946aef79408505451a2740bf8417859956f10ccb..45c8e3dc85f6eb1e89dbaedc30414e97100021bf 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,9 @@
+2008-10-18  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>
+
+       Diagnose unsupported uses of `backname' helper function.
+       * automake.in (backname): Error out if the path points outside
+       the directory it started in.
+
 2008-10-12  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>
 
        Nicer 'make dist' output.

diff --git a/automake.in b/automake.in
index 4e53484787200548ceb4d88e2dd8f18c5cf36186..335fe130aa2676a7ad314878546c0d673ab9051d 100755 (executable)
--- a/automake.in
+++ b/automake.in
@@ -1053,7 +1053,8 @@ sub backname ($)
        next if $_ eq '.' || $_ eq '';
        if ($_ eq '..')
        {
-           pop @res;
+           pop @res
+             or prog_error ("trying to reverse path `$file' pointing outside tree");
        }
        else
        {