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Check for error from dup2

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Do not take correct fd as error result.
This commit is contained in:
Zdenek Kabelac 2012-03-01 23:20:45 +00:00
parent a18693e705
commit d61c67b52d
1 changed files with 3 additions and 3 deletions
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6
tools/polldaemon.c
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@ -67,9 +67,9 @@ static int _become_daemon(struct cmd_context *cmd)
_exit(ECMD_FAILED);
}
if (dup2(null_fd, STDIN_FILENO) || /* reopen stdin */
dup2(null_fd, STDOUT_FILENO) || /* reopen stdout */
dup2(null_fd, STDERR_FILENO)) { /* reopen stderr */
if ((dup2(null_fd, STDIN_FILENO) < 0) || /* reopen stdin */
(dup2(null_fd, STDOUT_FILENO) < 0) || /* reopen stdout */
(dup2(null_fd, STDERR_FILENO) < 0)) { /* reopen stderr */
log_sys_error("dup2", "redirect");
(void) close(null_fd);
_exit(ECMD_FAILED);