2 * Copyright © 2006 Robert Millan
3 * Copyright © 2010-2012 Guillem Jover <guillem@hadrons.org>
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. The name of the author may not be used to endorse or promote products
14 * derived from this software without specific prior written permission.
16 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
17 * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
18 * AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
19 * THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
20 * EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
21 * PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
22 * OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
23 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
24 * OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
25 * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
30 * <https://sourceware.org/ml/libc-alpha/2006-03/msg00125.html>.
37 #ifdef HAVE___PROGNAME
38 extern const char *__progname;
40 static const char *__progname = NULL;
46 #if defined(HAVE_PROGRAM_INVOCATION_SHORT_NAME)
47 if (__progname == NULL)
48 __progname = program_invocation_short_name;
49 #elif defined(HAVE_GETEXECNAME)
50 /* getexecname(3) returns an absolute pathname, normalize it. */
51 if (__progname == NULL)
52 setprogname(getexecname());
59 setprogname(const char *progname)
61 const char *last_slash;
63 last_slash = strrchr(progname, '/');
64 if (last_slash == NULL)
65 __progname = progname;
67 __progname = last_slash + 1;