git.ozlabs.org Git - ccan/blob - _info

   1 #include <stdio.h>
   2 #include <string.h>
   3 #include "config.h"
   4
   5 /**
   6  * daemonize - routine to turn a process into a well-behaved daemon.
   7  *
   8  * Daemons should detach themselves thoroughly from the process which launched
   9  * them, and not prevent any filesystems from being unmounted.  daemonize()
  10  * helps with the process.
  11  *
  12  * Example:
  13  *      #include <ccan/daemonize/daemonize.h>
  14  *      #include <ccan/str/str.h>
  15  *      #include <err.h>
  16  *      #include <unistd.h>
  17  *      #include <stdlib.h>
  18  *
  19  *      static void usage(const char *name)
  20  *      {
  21  *              errx(1, "Usage: %s [--daemonize]\n", name);
  22  *      }
  23  *
  24  *      // Wait for a minute, possibly as a daemon.
  25  *      int main(int argc, char *argv[])
  26  *      {
  27  *              if (argc != 1) {
  28  *                      if (argc == 2 && streq(argv[1], "--daemonize")) {
  29  *                              if (!daemonize())
  30  *                                      err(1, "Failed to become daemon");
  31  *                      } else
  32  *                              usage(argv[1]);
  33  *              }
  34  *              sleep(60);
  35  *              exit(0);
  36  *      }
  37  *
  38  * License: BSD-MIT
  39  */
  40 int main(int argc, char *argv[])
  41 {
  42         if (argc != 2)
  43                 return 1;
  44
  45         if (strcmp(argv[1], "depends") == 0) {
  46                 return 0;
  47         }
  48
  49         if (strcmp(argv[1], "libs") == 0) {
  50                 return 0;
  51         }
  52
  53         return 1;
  54 }