Added daemonization and syslogging.

diff --git a/src/mctap.c b/src/mctap.c
index 2bec00f..842a9d6 100644 (file)
--- a/src/mctap.c
+++ b/src/mctap.c
@@ -11,12 +11,13 @@
 #include <fcntl.h>
 #include <sys/ioctl.h>
 #include <sys/poll.h>
+#include <syslog.h>
 
 #include "utils.h"
 
 static void usage(FILE *out)
 {
-    fprintf(out, "usage: mctap [-h] [-D TAPNAME] MCASTGROUP PORT\n");
+    fprintf(out, "usage: mctap [-hd] [-D TAPNAME] MCASTGROUP PORT\n");
 }
 
 static __attribute__ ((unused)) char *formataddress(struct sockaddr *arg, socklen_t arglen)
@@ -126,7 +127,7 @@ static void bridge(int sock, int tap, struct sockaddr *dst, socklen_t dstlen)
        ret = poll(pfds, 2, -1);
        if(ret < 0) {
            if(errno != EINTR) {
-               fprintf(stderr, "mctap: poll: %s\n", strerror(errno));
+               syslog(LOG_ERR, "mctap: poll: %s", strerror(errno));
                exit(1);
            }
            continue;
@@ -135,7 +136,7 @@ static void bridge(int sock, int tap, struct sockaddr *dst, socklen_t dstlen)
            ret = read(sock, buf, sizeof(buf));
            if(ret < 0) {
                if((errno != EINTR) && (errno != EAGAIN)) {
-                   fprintf(stderr, "mctap: mcast packet: %s\n", strerror(errno));
+                   syslog(LOG_ERR, "mctap: mcast packet: %s", strerror(errno));
                    exit(1);
                }
            } else {
@@ -154,7 +155,7 @@ static void bridge(int sock, int tap, struct sockaddr *dst, socklen_t dstlen)
            ret = read(tap, buf, sizeof(buf));
            if(ret < 0) {
                if((errno != EINTR) && (errno != EAGAIN)) {
-                   fprintf(stderr, "mctap: mcast packet: %s\n", strerror(errno));
+                   syslog(LOG_ERR, "mctap: mcast packet: %s", strerror(errno));
                    exit(1);
                }
            } else {
@@ -195,14 +196,19 @@ int main(int argc, char **argv)
     struct in_addr group;
     int port;
     char *tapname;
+    int daemonize;
     struct sockaddr_in dst;
     
     tapname = "mctap";
-    while((c = getopt(argc, argv, "hD:")) >= 0) {
+    daemonize = 0;
+    while((c = getopt(argc, argv, "hD:d")) >= 0) {
        switch(c) {
        case 'D':
            tapname = optarg;
            break;
+       case 'd':
+           daemonize = 1;
+           break;
        case 'h':
            usage(stdout);
            return(0);
@@ -228,6 +234,10 @@ int main(int argc, char **argv)
        fprintf(stderr, "mctap: could not create TAP device: %s\n", strerror(errno));
        exit(1);
     }
+    openlog(sprintf2("mctap-%s", tapname), LOG_PID, LOG_DAEMON);
+    
+    if(daemonize)
+       daemon(0, 0);
     
     memset(&dst, 0, sizeof(dst));
     dst.sin_family = AF_INET;