mdev: /sys/class/block/ are also block devices

function                                             old     new   delta
make_device                                         1200    1221     +21

1 files changed, 8 insertions, 2 deletions

diff --git a/util-linux/mdev.c b/util-linux/mdev.c
index 5e1cd36..4fff20d 100644
--- a/util-linux/mdev.c
+++ b/util-linux/mdev.c
@@ -70,8 +70,14 @@ static void make_device(char *path, int delete)
 	/* Determine device name, type, major and minor */
 	device_name = bb_basename(path);
 	/* http://kernel.org/doc/pending/hotplug.txt says that only
-	 * "/sys/block/..." is for block devices. "sys/bus" etc is not! */
-	type = (strncmp(&path[5], "block/", 6) == 0 ? S_IFBLK : S_IFCHR);
+	 * "/sys/block/..." is for block devices. "/sys/bus" etc is not!
+	 * Since kernel 2.6.25 block devices are also in /sys/class/block. */
+	/* TODO: would it be acceptable to just use strstr(path, "/block/")? */
+	if (strncmp(&path[5], "class/block/"+6, 6) != 0
+	 && strncmp(&path[5], "class/block/", 12) != 0)
+	        type = S_IFCHR;
+	else
+	        type = S_IFBLK;
 
 	if (ENABLE_FEATURE_MDEV_CONF) {
 		FILE *fp;