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      1 /*
      2  * Copyright (c) 2016 Nicholas Marriott <nicholas.marriott (at) 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 <sys/types.h>
     18 
     19 #include <stdarg.h>
     20 #include <stdlib.h>
     21 #include <string.h>
     22 
     23 #include "compat.h"
     24 
     25 #if defined(HAVE_PRCTL) && defined(HAVE_PR_SET_NAME)
     26 
     27 #include <sys/prctl.h>
     28 
     29 void
     30 setproctitle(const char *fmt, ...)
     31 {
     32 	char	title[16], name[16], *cp;
     33 	va_list	ap;
     34 	int	used;
     35 
     36 	va_start(ap, fmt);
     37 	vsnprintf(title, sizeof title, fmt, ap);
     38 	va_end(ap);
     39 
     40 	used = snprintf(name, sizeof name, "%s: %s", getprogname(), title);
     41 	if (used >= (int)sizeof name) {
     42 		cp = strrchr(name, ' ');
     43 		if (cp != NULL)
     44 			*cp = '\0';
     45 	}
     46 	prctl(PR_SET_NAME, name);
     47 }
     48 #else
     49 void
     50 setproctitle(__unused const char *fmt, ...)
     51 {
     52 }
     53 #endif
     54