Prefix most error messages with the program name.

1 files changed, 44 insertions, 0 deletions

diff --git a/lib/progname.c b/lib/progname.c
new file mode 100644
index 0000000..7068b39
--- /dev/null
+++ b/lib/progname.c
@@ -0,0 +1,44 @@
+/* Program name management.
+   Copyright (C) 2001 Free Software Foundation, Inc.
+   Written by Bruno Haible <haible@clisp.cons.org>, 2001.
+
+   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 2, 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+
+#ifdef HAVE_CONFIG_H
+# include "config.h"
+#endif
+
+#include <stdio.h>
+
+#include "progname.h"
+
+
+/* String containing name the program is called with.
+   To be initialized by main().  */
+const char *program_name;
+
+/* Indicates whether errors and warnings get prefixed with program_name.
+   Default is true.  */
+int error_with_progname = 1;
+
+/* Print program_name prefix on stderr if and only if error_with_progname
+   is true.  */
+void
+maybe_print_progname ()
+{
+  if (error_with_progname)
+    fprintf (stderr, "%s: ", program_name);
+}