1 files changed, 49 insertions, 0 deletions
diff --git a/lib/perror.c b/lib/perror.c
new file mode 100644
index 0000000..09dafb6
--- /dev/null
+++ b/lib/perror.c
@@ -0,0 +1,49 @@
+/* Print a message describing error code.
+   Copyright (C) 2008-2016 Free Software Foundation, Inc.
+   Written by Bruno Haible and Simon Josefsson.
+
+   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 of the License, 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, see <http://www.gnu.org/licenses/>.  */
+
+#include <config.h>
+
+/* Specification.  */
+#include <stdio.h>
+
+#include <errno.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include "strerror-override.h"
+
+/* Use the system functions, not the gnulib overrides in this file.  */
+#undef fprintf
+
+void
+perror (const char *string)
+{
+  char stackbuf[STACKBUF_LEN];
+  int ret;
+
+  /* Our implementation guarantees that this will be a non-empty
+     string, even if it returns EINVAL; and stackbuf should be sized
+     large enough to avoid ERANGE.  */
+  ret = strerror_r (errno, stackbuf, sizeof stackbuf);
+  if (ret == ERANGE)
+    abort ();
+
+  if (string != NULL && *string != '\0')
+    fprintf (stderr, "%s: %s\n", string, stackbuf);
+  else
+    fprintf (stderr, "%s\n", stackbuf);
+}