1/* Program name management.
2   Copyright (C) 2001-2003, 2005-2006 Free Software Foundation, Inc.
3   Written by Bruno Haible <haible@clisp.cons.org>, 2001.
4
5   This program is free software; you can redistribute it and/or modify
6   it under the terms of the GNU General Public License as published by
7   the Free Software Foundation; either version 2, or (at your option)
8   any later version.
9
10   This program is distributed in the hope that it will be useful,
11   but WITHOUT ANY WARRANTY; without even the implied warranty of
12   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
13   GNU General Public License for more details.
14
15   You should have received a copy of the GNU General Public License
16   along with this program; if not, write to the Free Software Foundation,
17   Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.  */
18
19
20#include <config.h>
21
22/* Specification.  */
23#undef ENABLE_RELOCATABLE /* avoid defining set_program_name as a macro */
24#include "progname.h"
25
26#include <string.h>
27
28
29/* String containing name the program is called with.
30   To be initialized by main().  */
31const char *program_name = NULL;
32
33/* Set program_name, based on argv[0].  */
34void
35set_program_name (const char *argv0)
36{
37  /* libtool creates a temporary executable whose name is sometimes prefixed
38     with "lt-" (depends on the platform).  It also makes argv[0] absolute.
39     Remove this "<dirname>/.libs/" or "<dirname>/.libs/lt-" prefix here.  */
40  const char *slash;
41  const char *base;
42
43  slash = strrchr (argv0, '/');
44  base = (slash != NULL ? slash + 1 : argv0);
45  if (base - argv0 >= 7 && memcmp (base - 7, "/.libs/", 7) == 0)
46    argv0 = base;
47  if (strncmp (base, "lt-", 3) == 0)
48    argv0 = base + 3;
49  program_name = argv0;
50}
51