chiark / gitweb /
udev: add missing newline when writing to /dev/kmsg
[elogind.git] / src / udev / udev-event.c
index bea316c..2b9fdf6 100644 (file)
@@ -132,8 +132,8 @@ size_t udev_event_apply_format(struct udev_event *event, const char *src, char *
                                         goto copy;
                                 }
 
-                                for (i = 0; i < ARRAY_SIZE(map); i++) {
-                                        if (strncmp(&from[1], map[i].name, strlen(map[i].name)) == 0) {
+                                for (i = 0; i < ELEMENTSOF(map); i++) {
+                                        if (startswith(&from[1], map[i].name)) {
                                                 type = map[i].type;
                                                 from += strlen(map[i].name)+1;
                                                 goto subst;
@@ -148,7 +148,7 @@ size_t udev_event_apply_format(struct udev_event *event, const char *src, char *
                                         goto copy;
                                 }
 
-                                for (i = 0; i < ARRAY_SIZE(map); i++) {
+                                for (i = 0; i < ELEMENTSOF(map); i++) {
                                         if (from[1] == map[i].fmt) {
                                                 type = map[i].type;
                                                 from += 2;
@@ -318,46 +318,38 @@ subst:
                         if (dev_parent == NULL)
                                 break;
                         devnode = udev_device_get_devnode(dev_parent);
-                        if (devnode != NULL) {
-                                size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
-
-                                l = util_strpcpy(&s, l, &devnode[devlen]);
-                        }
+                        if (devnode != NULL)
+                                l = util_strpcpy(&s, l, devnode + strlen("/dev/"));
                         break;
                 }
                 case SUBST_DEVNODE:
                         if (udev_device_get_devnode(dev) != NULL)
                                 l = util_strpcpy(&s, l, udev_device_get_devnode(dev));
                         break;
-                case SUBST_NAME: {
-                        if (event->name != NULL) {
+                case SUBST_NAME:
+                        if (event->name != NULL)
                                 l = util_strpcpy(&s, l, event->name);
-                        } else if (udev_device_get_devnode(dev) != NULL) {
-                                size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
-
-                                l = util_strpcpy(&s, l, &udev_device_get_devnode(dev)[devlen]);
-                        } else {
+                        else if (udev_device_get_devnode(dev) != NULL)
+                                l = util_strpcpy(&s, l, udev_device_get_devnode(dev) + strlen("/dev/"));
+                        else
                                 l = util_strpcpy(&s, l, udev_device_get_sysname(dev));
-                        }
                         break;
-                }
                 case SUBST_LINKS: {
-                        size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
                         struct udev_list_entry *list_entry;
 
                         list_entry = udev_device_get_devlinks_list_entry(dev);
                         if (list_entry == NULL)
                                 break;
-                        l = util_strpcpy(&s, l, &udev_list_entry_get_name(list_entry)[devlen]);
+                        l = util_strpcpy(&s, l, udev_list_entry_get_name(list_entry) + strlen("/dev/"));
                         udev_list_entry_foreach(list_entry, udev_list_entry_get_next(list_entry))
-                                l = util_strpcpyl(&s, l, " ", &udev_list_entry_get_name(list_entry)[devlen], NULL);
+                                l = util_strpcpyl(&s, l, " ", udev_list_entry_get_name(list_entry) + strlen("/dev/"), NULL);
                         break;
                 }
                 case SUBST_ROOT:
-                        l = util_strpcpy(&s, l, udev_get_dev_path(event->udev));
+                        l = util_strpcpy(&s, l, "/dev");
                         break;
                 case SUBST_SYS:
-                        l = util_strpcpy(&s, l, udev_get_sys_path(event->udev));
+                        l = util_strpcpy(&s, l, "/sys");
                         break;
                 case SUBST_ENV:
                         if (attr == NULL) {
@@ -486,7 +478,7 @@ static void spawn_read(struct udev_event *event,
                         timeout = -1;
                 }
 
-                fdcount = epoll_wait(fd_ep, ev, ARRAY_SIZE(ev), timeout);
+                fdcount = epoll_wait(fd_ep, ev, ELEMENTSOF(ev), timeout);
                 if (fdcount < 0) {
                         if (errno == EINTR)
                                 continue;
@@ -753,32 +745,11 @@ out:
         return err;
 }
 
-static void rename_netif_kernel_log(struct ifreq ifr)
-{
-        int klog;
-        FILE *f;
-
-        klog = open("/dev/kmsg", O_WRONLY);
-        if (klog < 0)
-                return;
-
-        f = fdopen(klog, "w");
-        if (f == NULL) {
-                close(klog);
-                return;
-        }
-
-        fprintf(f, "<30>udevd[%u]: renamed network interface %s to %s\n",
-                getpid(), ifr.ifr_name, ifr.ifr_newname);
-        fclose(f);
-}
-
 static int rename_netif(struct udev_event *event)
 {
         struct udev_device *dev = event->dev;
         int sk;
         struct ifreq ifr;
-        int loop;
         int err;
 
         log_debug("changing net interface name from '%s' to '%s'\n",
@@ -795,49 +766,12 @@ static int rename_netif(struct udev_event *event)
         util_strscpy(ifr.ifr_name, IFNAMSIZ, udev_device_get_sysname(dev));
         util_strscpy(ifr.ifr_newname, IFNAMSIZ, event->name);
         err = ioctl(sk, SIOCSIFNAME, &ifr);
-        if (err == 0) {
-                rename_netif_kernel_log(ifr);
-                goto out;
-        }
-
-        /* keep trying if the destination interface name already exists */
-        err = -errno;
-        if (err != -EEXIST)
-                goto out;
-
-        /* free our own name, another process may wait for us */
-        snprintf(ifr.ifr_newname, IFNAMSIZ, "rename%u", udev_device_get_ifindex(dev));
-        err = ioctl(sk, SIOCSIFNAME, &ifr);
-        if (err < 0) {
-                err = -errno;
-                goto out;
-        }
-
-        /* log temporary name */
-        rename_netif_kernel_log(ifr);
-
-        /* wait a maximum of 90 seconds for our target to become available */
-        util_strscpy(ifr.ifr_name, IFNAMSIZ, ifr.ifr_newname);
-        util_strscpy(ifr.ifr_newname, IFNAMSIZ, event->name);
-        loop = 90 * 20;
-        while (loop--) {
-                const struct timespec duration = { 0, 1000 * 1000 * 1000 / 20 };
-
-                nanosleep(&duration, NULL);
-
-                err = ioctl(sk, SIOCSIFNAME, &ifr);
-                if (err == 0) {
-                        rename_netif_kernel_log(ifr);
-                        break;
-                }
+        if (err >= 0) {
+                print_kmsg("renamed network interface %s to %s\n", ifr.ifr_name, ifr.ifr_newname);
+        } else {
                 err = -errno;
-                if (err != -EEXIST)
-                        break;
-        }
-
-out:
-        if (err < 0)
                 log_error("error changing net interface name %s to %s: %m\n", ifr.ifr_name, ifr.ifr_newname);
+        }
         close(sk);
         return err;
 }