make sure path exists before mknod is called

Signed-off-by: John Crispin <blogic@openwrt.org>

diff --git a/hotplug.c b/hotplug.c
index f7e2ce9767befbeeef6c2e8dc36d5ae2c05a4a59..c2276ed78981311913f42d02b2c45dab049a7213 100644 (file)
--- a/hotplug.c
+++ b/hotplug.c
@@ -66,6 +66,18 @@ static char *hotplug_msg_find_var(struct blob_attr *msg, const char *name)
        return NULL;
 }
 
+static void mkdir_p(char *dir)
+{
+       char *l = strrchr(dir, '/');
+
+       if (l) {
+               *l = '\0';
+               mkdir_p(dir);
+               *l = '/';
+               mkdir(dir, 0755);
+       }
+}
+
 static void handle_makedev(struct blob_attr *msg, struct blob_attr *data)
 {
        static struct blobmsg_policy mkdev_policy[2] = {
@@ -80,6 +92,12 @@ static void handle_makedev(struct blob_attr *msg, struct blob_attr *data)
        blobmsg_parse_array(mkdev_policy, 2, tb, blobmsg_data(data), blobmsg_data_len(data));
        if (tb[0] && tb[1] && minor && major && subsystem) {
                mode_t m = S_IFCHR;
+               char *d = strdup(blobmsg_get_string(tb[0]));
+
+               d = dirname(d);
+               mkdir_p(d);
+               free(d);
+
                if (!strcmp(subsystem, "block"))
                        m = S_IFBLK;
                mknod(blobmsg_get_string(tb[0]),