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daemon should check for failures and return -1

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This commit is contained in:
Rich Felker 2011-02-17 10:28:56 -05:00
parent b24bc15f5c
commit 19e35c500b
1 changed files with 8 additions and 5 deletions
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13
src/linux/daemon.c
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@ -19,12 +19,15 @@ int daemon(int nochdir, int noclose)
default: _exit(0);
}
if (!nochdir) chdir("/");
if (!noclose && (fd = open("/dev/null", O_RDWR)) >= 0) {
dup2(fd, 0);
dup2(fd, 1);
dup2(fd, 2);
if (!nochdir && chdir("/"))
return -1;
if (!noclose) {
int failed = 0;
if ((fd = open("/dev/null", O_RDWR)) < 0) return -1;
if (dup2(fd, 0) < 0 || dup2(fd, 1) < 0 || dup2(fd, 2) < 0)
failed++;
if (fd > 2) close(fd);
if (failed) return -1;
}
return 0;