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Viewing changes to src/legacy/daemon.c

  • Committer: Package Import Robot
  • Author(s): Kevin Bortis
  • Date: 2013-09-20 20:54:14 UTC
  • Revision ID: package-import@ubuntu.com-20130920205414-5b61trtmma18w58o
Tags: upstream-0.9.13
Import upstream version 0.9.13

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src/legacy/daemon.c
 
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#define _GNU_SOURCE
 
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#include <fcntl.h>
 
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#include <unistd.h>
 
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int daemon(int nochdir, int noclose)
 
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{
 
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        if (!nochdir && chdir("/"))
 
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                return -1;
 
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        if (!noclose) {
 
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                int fd, failed = 0;
 
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                if ((fd = open("/dev/null", O_RDWR)) < 0) return -1;
 
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                if (dup2(fd, 0) < 0 || dup2(fd, 1) < 0 || dup2(fd, 2) < 0)
 
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                        failed++;
 
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                if (fd > 2) close(fd);
 
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                if (failed) return -1;
 
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        }
 
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        switch(fork()) {
 
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        case 0: break;
 
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        case -1: return -1;
 
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        default: _exit(0);
 
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        }
 
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        if (setsid() < 0) return -1;
 
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        switch(fork()) {
 
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        case 0: break;
 
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        case -1: return -1;
 
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        default: _exit(0);
 
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        }
 
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        return 0;
 
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}