1 /*
2  * Copyright (c) 2016 Nicholas Marriott <nicholas.marriott@gmail.com>
3  *
4  * Permission to use, copy, modify, and distribute this software for any
5  * purpose with or without fee is hereby granted, provided that the above
6  * copyright notice and this permission notice appear in all copies.
7  *
8  * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9  * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10  * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11  * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12  * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
13  * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
14  * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15  */
16 
17 #include "compat.h"
18 
19 #include <sys/types.h>
20 
21 #include <stdarg.h>
22 #include <stdio.h>
23 #include <stdlib.h>
24 #include <string.h>
25 
26 #if HAVE_PR_SET_NAME
27 
28 #include <sys/prctl.h>
29 
30 void
31 setproctitle(const char *fmt, ...)
32 {
33 	char	title[16], name[16], *cp;
34 	va_list	ap;
35 	int	used;
36 
37 	va_start(ap, fmt);
38 	vsnprintf(title, sizeof title, fmt, ap);
39 	va_end(ap);
40 
41 	used = snprintf(name, sizeof name, "%s: %s", getprogname(), title);
42 	if (used >= (int)sizeof name) {
43 		cp = strrchr(name, ' ');
44 		if (cp != NULL)
45 			*cp = '\0';
46 	}
47 	prctl(PR_SET_NAME, name);
48 }
49 #else
50 void
51 setproctitle(const char *fmt, ...)
52 {
53 	(void)fmt;
54 }
55 #endif