src/util/daemon.c

   1 #include <afsconfig.h>
   2 #include <afs/param.h>
   3
   4 #ifndef HAVE_DAEMON
   5
   6 #include <stdio.h>
   7 #include <stdlib.h>
   8 #include <unistd.h>
   9
  10 #include <sys/types.h>
  11
  12 int daemon(int nochdir, int noclose)
  13 {
  14         int err = -1;
  15         pid_t pid;
  16
  17         pid = fork();
  18         if (pid == -1) {
  19                 goto out;
  20         } else if (pid) {
  21                 exit(0);
  22         }
  23
  24         err = setsid();
  25         if (err == -1) {
  26                 goto out;
  27         }
  28
  29         if (!nochdir) {
  30                 err = chdir("/");
  31                 if (err == -1) {
  32                         goto out;
  33                 }
  34         }
  35
  36         err = -1;
  37         if (!noclose) {
  38                 if (!freopen("/dev/null", "r", stdin)) {
  39                         goto out;
  40                 }
  41
  42                 if (!freopen("/dev/null", "w", stdout)) {
  43                         goto out;
  44                 }
  45
  46                 if (!freopen("/dev/null", "w", stderr)) {
  47                         goto out;
  48                 }
  49         }
  50
  51         err = 0;
  52
  53 out:
  54         return(err);
  55 }
  56 #endif