Const correctness.

[tinc] / src / linux / device.c

diff --git a/src/linux/device.c b/src/linux/device.c
index f75f4bd..38debe8 100644 (file)
--- a/src/linux/device.c
+++ b/src/linux/device.c
@@ -47,7 +47,7 @@ char *device = NULL;
 char *iface = NULL;
 static char *type = NULL;
 static char ifrname[IFNAMSIZ];
-static char *device_info;
+static const char *device_info;
 
 static uint64_t device_total_in = 0;
 static uint64_t device_total_out = 0;
@@ -125,6 +125,9 @@ static bool setup_device(void) {
                ifrname[IFNAMSIZ - 1] = 0;
                free(iface);
                iface = xstrdup(ifrname);
+       } else if(errno == EPERM || errno == EBUSY) {
+               logger(LOG_ERR, "Error while trying to configure %s: %s", device, strerror(errno));
+               return false;
        } else if(!ioctl(device_fd, (('T' << 8) | 202), &ifr)) {
                logger(LOG_WARNING, "Old ioctl() request was needed for %s", device);
                strncpy(ifrname, ifr.ifr_name, IFNAMSIZ);