Warn only when tun_create() fail

src/main.c

@@ -783,8 +783,10 @@ int main (int argc, char **argv)
 
     tun.fd = tun_create(dev, option_is_set(opts, "multiqueue"));
 
-    if (tun.fd==-1)
+    if (tun.fd==-1) {
+        gt_log("couldn't create tun device\n");
         return 1;
+    }
 
     struct blk *blks = calloc(256, sizeof(struct blk));
     size_t blk_count = 0;

src/tun.c

@@ -35,10 +35,8 @@ static int tun_create_by_name (char *name, size_t size, char *dev_name, int mq)
 {
     int fd = open("/dev/net/tun", O_RDWR);
 
-    if (fd==-1) {
-        perror("open /dev/net/tun");
+    if (fd==-1)
         return -1;
-    }
 
     struct ifreq ifr = {
         .ifr_flags = IFF_TUN|IFF_NO_PI,
@@ -55,7 +53,6 @@ static int tun_create_by_name (char *name, size_t size, char *dev_name, int mq)
     str_cpy(ifr.ifr_name, dev_name, IFNAMSIZ-1);
 
     if (ioctl(fd, TUNSETIFF, &ifr)) {
-        perror("ioctl TUNSETIFF");
         close(fd);
         return -1;
     }
@@ -69,10 +66,8 @@ static int tun_create_by_id (char *name, size_t size, unsigned id, _unused_ int
 {
     int fd = socket(PF_SYSTEM, SOCK_DGRAM, SYSPROTO_CONTROL);
 
-    if (fd==-1) {
-        perror("socket");
+    if (fd==-1)
         return -1;
-    }
 
     struct ctl_info ci;
 
@@ -80,7 +75,6 @@ static int tun_create_by_id (char *name, size_t size, unsigned id, _unused_ int
     str_cpy(ci.ctl_name, UTUN_CONTROL_NAME, sizeof(ci.ctl_name)-1);
 
     if (ioctl(fd, CTLIOCGINFO, &ci)) {
-        perror("ioctl CTLIOCGINFO");
         close(fd);
         return -1;
     }
@@ -94,7 +88,6 @@ static int tun_create_by_id (char *name, size_t size, unsigned id, _unused_ int
     };
 
     if (connect(fd, (struct sockaddr *)&sc, sizeof(sc))) {
-        perror("connect");
         close(fd);
         return -1;
     }