From e496036b592c7c6d1bc419b5683a6a25bf46e193 Mon Sep 17 00:00:00 2001 From: Diego Santa Cruz Date: Wed, 9 Sep 2020 16:16:49 +0000 Subject: llmnrd: add command line option to log to syslog instead of stdio When llmnrd daemonizes stdout and stderr are redirected to /dev/null and all logs are lost. This adds a cli option -s / --syslog to send the logs to syslog instead. Signed-off-by: Diego Santa Cruz --- llmnrd.c | 8 +++++++- 1 file changed, 7 insertions(+), 1 deletion(-) (limited to 'llmnrd.c') diff --git a/llmnrd.c b/llmnrd.c index 92cd738..1ea241f 100644 --- a/llmnrd.c +++ b/llmnrd.c @@ -49,13 +49,14 @@ static int llmnrd_sock_ipv4 = -1; static int llmnrd_sock_ipv6 = -1; static int llmnrd_fd_hostname = -1; -static const char *short_opts = "H:i:p:6dhV"; +static const char *short_opts = "H:i:p:6dshV"; static const struct option long_opts[] = { { "hostname", required_argument, NULL, 'H' }, { "interface", required_argument, NULL, 'i' }, { "port", required_argument, NULL, 'p' }, { "ipv6", no_argument, NULL, '6' }, { "daemonize", no_argument, NULL, 'd' }, + { "syslog", no_argument, NULL, 's' }, { "help", no_argument, NULL, 'h' }, { "version", no_argument, NULL, 'V' }, { NULL, 0, NULL, 0 }, @@ -70,6 +71,7 @@ static void __noreturn usage_and_exit(int status) " -p, --port NUM set port number to listen on (default: %d)\n" " -6, --ipv6 enable LLMNR name resolution over IPv6\n" " -d, --daemonize run as daemon in the background\n" + " -s, --syslog send all log output to syslog\n" " -h, --help show this help and exit\n" " -V, --version show version information and exit\n", LLMNR_UDP_PORT); @@ -167,6 +169,10 @@ int main(int argc, char **argv) case 'd': daemonize = true; break; + case 's': + openlog("llmnrd", LOG_PID, LOG_DAEMON); + log_to_syslog(); + break; case 'H': hostname = xstrdup(optarg); break; -- cgit v1.2.3-54-g00ecf