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comparison toys/pending/syslogd.c @ 995:893c86bbe452

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Add daemonize function to lib for klogd and syslogd
author Felix Janda <felix.janda@posteo.de>
date Sat, 10 Aug 2013 20:18:18 +0200
parents c0627c163893
children 8b1814e4c987
comparison
equal deleted inserted replaced
994:00c7b6f4104a 995:893c86bbe452
630 signal(SIGTERM, signal_handler); 630 signal(SIGTERM, signal_handler);
631 signal(SIGINT, signal_handler); 631 signal(SIGINT, signal_handler);
632 signal(SIGQUIT, signal_handler); 632 signal(SIGQUIT, signal_handler);
633 } 633 }
634 634
635 static void syslog_daemon(void)
636 {
637 int fd = open("/dev/null", O_RDWR);
638 if (fd < 0) fd = xcreate("/", O_RDONLY, 0666);
639
640 pid_t pid = fork();
641 if (pid < 0) perror_exit("DAEMON: failed to fork");
642 if (pid) exit(EXIT_SUCCESS);
643
644 setsid();
645 dup2(fd, 0);
646 dup2(fd, 1);
647 dup2(fd, 2);
648 if (fd > 2) close(fd);
649
650 //don't daemonize again if SIGHUP received.
651 toys.optflags |= FLAG_n;
652 }
653
654 void syslogd_main(void) 635 void syslogd_main(void)
655 { 636 {
656 unsocks_t *tsd; 637 unsocks_t *tsd;
657 int maxfd, retval, last_len=0; 638 int maxfd, retval, last_len=0;
658 struct timeval tv; 639 struct timeval tv;
686 goto clean_and_exit; 667 goto clean_and_exit;
687 } 668 }
688 setup_signal(); 669 setup_signal();
689 if (parse_config_file() == -1) goto clean_and_exit; 670 if (parse_config_file() == -1) goto clean_and_exit;
690 open_logfiles(); 671 open_logfiles();
691 if (!flag_chk(FLAG_n)) syslog_daemon(); 672 if (!flag_chk(FLAG_n)) {
673 //don't daemonize again if SIGHUP received.
674 toys.optflags |= FLAG_n;
675 }
692 { 676 {
693 int pid_fd = open("/var/run/syslogd.pid", O_CREAT | O_WRONLY | O_TRUNC, 0666); 677 int pid_fd = open("/var/run/syslogd.pid", O_CREAT | O_WRONLY | O_TRUNC, 0666);
694 if (pid_fd > 0) { 678 if (pid_fd > 0) {
695 unsigned pid = getpid(); 679 unsigned pid = getpid();
696 int len = sprintf(toybuf, "%u\n", pid); 680 int len = sprintf(toybuf, "%u\n", pid);