1/* Program name management.
2   Copyright (C) 2001-2003, 2005 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#ifdef HAVE_CONFIG_H
21# include "config.h"
22#endif
23
24/* Specification.  */
25#include "progname.h"
26
27#include <string.h>
28
29#undef set_program_name
30
31
32/* String containing name the program is called with.
33   To be initialized by main().  */
34const char *program_name = NULL;
35
36/* Set program_name, based on argv[0].  */
37void
38set_program_name (const char *argv0)
39{
40  /* libtool creates a temporary executable whose name is sometimes prefixed
41     with "lt-" (depends on the platform).  It also makes argv[0] absolute.
42     Remove this "<dirname>/.libs/" or "<dirname>/.libs/lt-" prefix here.  */
43  const char *slash;
44  const char *base;
45
46  slash = strrchr (argv0, '/');
47  base = (slash != NULL ? slash + 1 : argv0);
48  if (base - argv0 >= 7 && memcmp (base - 7, "/.libs/", 7) == 0)
49    argv0 = base;
50  if (strncmp (base, "lt-", 3) == 0)
51    argv0 = base + 3;
52  program_name = argv0;
53}
54