[PATCH] prevent udev node creatinon for "class" registration

I've found a /dev/video4linux node and just realized, that libsysfs
searches all subdirs for an attribute name.
So it found /class/video4linux/video0/dev for the videodev class
creation event /class/video4linux and created a node.

Just ignore the SUBSYSTEM="class" events now.

2 files changed, 8 insertions, 7 deletions

diff --git a/udev_sysfs.c b/udev_sysfs.c
index ac8e4c1060..a4f293ef13 100644
--- a/udev_sysfs.c
+++ b/udev_sysfs.c
@@ -39,6 +39,7 @@ static const struct subsystem_file {
 	const char *subsystem;
 	const char *file;
 } subsystem_files[] = {
+	{ .subsystem = "class",		.file = NULL },
 	{ .subsystem = "net",		.file = "ifindex" },
 	{ .subsystem = "scsi_host",	.file = "unique_id" },
 	{ .subsystem = "scsi_device",	.file = NULL },
diff --git a/udevtest.c b/udevtest.c
index 38e2bb7562..19cf9ec4f4 100644
--- a/udevtest.c
+++ b/udevtest.c
@@ -84,12 +84,6 @@ int main(int argc, char *argv[], char *envp[])
 
 	info("looking at '%s'", devpath);
 
-	/* we only care about class devices and block stuff */
-	if (!strstr(devpath, "class") && !strstr(devpath, "block")) {
-		dbg("not a block or class device");
-		return 2;
-	}
-
 	/* initialize the naming deamon */
 	namedev_init();
 
@@ -99,6 +93,12 @@ int main(int argc, char *argv[], char *envp[])
 	/* fill in values and test_run flag*/
 	udev_init_device(&udev, devpath, subsystem);
 
+	/* skip subsystems without "dev", but handle net devices */
+	if (udev.type != 'n' && subsystem_expect_no_dev(udev.subsystem)) {
+		info("don't care about '%s' devices", udev.subsystem);
+		return 2;
+	}
+
 	/* open the device */
 	snprintf(path, SYSFS_PATH_MAX, "%s%s", sysfs_path, udev.devpath);
 	class_dev = sysfs_open_class_device_path(path);
@@ -107,7 +107,7 @@ int main(int argc, char *argv[], char *envp[])
 		return 1;
 	}
 
-	dbg("opened class_dev->name='%s'", class_dev->name);
+	info("opened class_dev->name='%s'", class_dev->name);
 
 	/* simulate node creation with test flag */
 	udev.test_run = 1;