Change strerror so that it never returns an empty string.

diff --git a/ChangeLog b/ChangeLog
index 877b6653857bd6bee72c055afc43bfd794770387..e5ea16c6df0b37b96b16ff1127e355976bf53c69 100644 (file)
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2007-10-26  Bruno Haible  <bruno@clisp.org>
+
+       * lib/strerror.c (rpl_strerror): Return "Unknown error ..." also if
+       strerror returned the empty string. Needed on HP-UX 11.00.
+
 2007-10-24  Micah Cowan  <micah@cowan.name>
 
        Remove vestiges of cvs-gnulib-checkout process.  Now we use git.

diff --git a/lib/strerror.c b/lib/strerror.c
index 9b9ffd104d57353c534b639ba8f6dbb2fa941b06..9fe437db78df8a661bb2f6709b8d943b102832cc 100644 (file)
--- a/lib/strerror.c
+++ b/lib/strerror.c
@@ -35,7 +35,7 @@ rpl_strerror (int n)
 {
   char *result = strerror (n);
 
-  if (! result)
+  if (result == NULL || result[0] == '\0')
     {
       static char const fmt[] = "Unknown error (%d)";
       static char mesg[sizeof fmt + INT_STRLEN_BOUND (n)];