compat/setproctitle.c

   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 <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