Hi,
This piece of code deserves better comments explaining all the "magic" happening to stderr and what the first call to rsyslog exactly does.
> + /* Check that the final config file is sane. Disable stderr
> temporarily */
> + int stderr_dup;
> + int status;
> + stderr_dup = dup(2);
> close(2);
> -
> - dup2(1, log);
> -
> -#if defined(USE_LOGDEV)
> - /* now open the syslog socket */
> - sockaddr.sun_family = AF_UNIX;
> - strcpy(sockaddr.sun_path, "/dev/log");
> - sock = socket(AF_UNIX, SOCK_STREAM, 0);
> - if (sock < 0) {
> - printf("error creating socket: %d\n", errno);
> - sleep(5);
> - }
> - printstr("got socket\n");
> - if (bind(sock, (struct sockaddr *) &sockaddr,
> sizeof(sockaddr.sun_family) +
> - strlen(sockaddr.sun_path))) {
> - printf("bind error: %d\n", errno);
> - sleep(5);
> - }
> - printstr("bound socket\n");
> - chmod("/dev/log", 0666);
> - if (listen(sock, 5)) {
> - printf("listen error: %d\n", errno);
> - sleep(5);
> + status = system("/sbin/rsyslogd -c 4n -N1");
> + dup2(stderr_dup, 2); /* restore stderr */
> + if (status < 0 ||
> + !WIFEXITED(status) ||
> + WEXITSTATUS(status) != 0) {
> + printf("Unable to start syslog daemon due to its
> configuration file "
> + "being corrupted. Did you pass in a wrong
> \"syslog=\"?\n");
> + fatal_error(1);
> }
Martin
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