1 /*
2  * Copyright (c) 2016 Nicholas Marriott <nicholas.marriott@gmail.com>
3  * Copyright (c) 2017 Kristaps Dzonsons <kristaps@bsd.lv>
4  * Copyright (c) 2020 Stephen Gregoratto <dev@sgregoratto.me>
5  *
6  * Permission to use, copy, modify, and distribute this software for any
7  * purpose with or without fee is hereby granted, provided that the above
8  * copyright notice and this permission notice appear in all copies.
9  *
10  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
11  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
12  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
13  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
14  * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
15  * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
16  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
17  */
18 
19 #include <sys/types.h>
20 
21 #include <errno.h>
22 
23 #if HAVE_GETEXECNAME
24 #include <stdlib.h>
25 const char *
26 getprogname(void)
27 {
28 	return getexecname();
29 }
30 #elif HAVE_PROGRAM_INVOCATION_SHORT_NAME
31 const char *
32 getprogname(void)
33 {
34 	return (program_invocation_short_name);
35 }
36 #elif HAVE___PROGNAME
37 const char *
38 getprogname(void)
39 {
40 	extern char	*__progname;
41 
42 	return (__progname);
43 }
44 #else
45 #error No getprogname available.
46 #endif