remove mknod() logic and rely on 'devtmpfs'

28 files changed, 169 insertions, 613 deletions

diff --git a/NEWS b/NEWS
index b052257c..f65ae0d7 100644
--- a/NEWS
+++ b/NEWS
@@ -1,5 +1,9 @@
 udev 175
 ========
+The 'devtmpfs' filesystem is required now, udev will not create or delete
+device nodes anymore, it only adjusts permissions and ownership of device
+nodes and maintains additional symlinks.
+
 A writable /run directory (tmpfs) is required now for a fully functional
 udev.
 
@@ -26,7 +30,7 @@ All built-in tools can be listed and tested with 'udevadm test-builtin'.
 The 'udevadm control --reload-rules' option has been renamed to '--reload'.
 It reloads the kernel module configuration.
 
-The systemd socket files use PassCred=yes, which requires systemd
+The systemd socket files use PassCredentials=yes, which requires systemd
 version 38.
 
 The udev build system only creates a .xz tarball now.
diff --git a/extras/cdrom_id/60-cdrom_id.rules b/extras/cdrom_id/60-cdrom_id.rules
index 896af348..353f522b 100644
--- a/extras/cdrom_id/60-cdrom_id.rules
+++ b/extras/cdrom_id/60-cdrom_id.rules
@@ -9,10 +9,10 @@ ENV{DEVTYPE}!="disk", GOTO="cdrom_end"
 KERNEL=="sr[0-9]*", ENV{ID_CDROM}="1"
 
 # media eject button pressed
-ENV{DISK_EJECT_REQUEST}=="?*", RUN+="cdrom_id --eject-media $tempnode", GOTO="cdrom_end"
+ENV{DISK_EJECT_REQUEST}=="?*", RUN+="cdrom_id --eject-media $devnode", GOTO="cdrom_end"
 
 # import device and media properties and lock tray to
 # enable the receiving of media eject button events
-IMPORT{program}="cdrom_id --lock-media $tempnode"
+IMPORT{program}="cdrom_id --lock-media $devnode"
 
 LABEL="cdrom_end"
diff --git a/extras/edd_id/61-persistent-storage-edd.rules b/extras/edd_id/61-persistent-storage-edd.rules
index 1ab1be34..6b4fb8ec 100644
--- a/extras/edd_id/61-persistent-storage-edd.rules
+++ b/extras/edd_id/61-persistent-storage-edd.rules
@@ -5,7 +5,7 @@ SUBSYSTEM!="block", GOTO="persistent_storage_edd_end"
 KERNEL!="sd*|hd*|cciss*", GOTO="persistent_storage_edd_end"
 
 # BIOS Enhanced Disk Device
-ENV{DEVTYPE}=="disk", IMPORT{program}="edd_id --export $tempnode"
+ENV{DEVTYPE}=="disk", IMPORT{program}="edd_id --export $devnode"
 ENV{DEVTYPE}=="disk", ENV{ID_EDD}=="?*", SYMLINK+="disk/by-id/edd-$env{ID_EDD}"
 ENV{DEVTYPE}=="partition", ENV{ID_EDD}=="?*", SYMLINK+="disk/by-id/edd-$env{ID_EDD}-part%n"
 
diff --git a/extras/mtd_probe/75-probe_mtd.rules b/extras/mtd_probe/75-probe_mtd.rules
index 6b0c1c27..c0e08397 100644
--- a/extras/mtd_probe/75-probe_mtd.rules
+++ b/extras/mtd_probe/75-probe_mtd.rules
@@ -2,7 +2,7 @@
 
 ACTION!="add", GOTO="mtd_probe_end"
 
-KERNEL=="mtd*ro", IMPORT{program}="mtd_probe $tempnode"
+KERNEL=="mtd*ro", IMPORT{program}="mtd_probe $devnode"
 KERNEL=="mtd*ro", ENV{MTD_FTL}=="smartmedia", IMPORT{builtin}="kmod load sm_ftl"
 
 LABEL="mtd_probe_end"
diff --git a/extras/v4l_id/60-persistent-v4l.rules b/extras/v4l_id/60-persistent-v4l.rules
index edfd8447..93c5ee8c 100644
--- a/extras/v4l_id/60-persistent-v4l.rules
+++ b/extras/v4l_id/60-persistent-v4l.rules
@@ -4,7 +4,7 @@ ACTION=="remove", GOTO="persistent_v4l_end"
 SUBSYSTEM!="video4linux", GOTO="persistent_v4l_end"
 ENV{MAJOR}=="", GOTO="persistent_v4l_end"
 
-IMPORT{program}="v4l_id $tempnode"
+IMPORT{program}="v4l_id $devnode"
 
 SUBSYSTEMS=="usb", IMPORT{builtin}="usb_id"
 KERNEL=="video*", ENV{ID_SERIAL}=="?*", SYMLINK+="v4l/by-id/$env{ID_BUS}-$env{ID_SERIAL}-video-index$attr{index}"
diff --git a/libudev/libudev-device-private.c b/libudev/libudev-device-private.c
index b78b6c95..08649193 100644
--- a/libudev/libudev-device-private.c
+++ b/libudev/libudev-device-private.c
@@ -78,7 +78,6 @@ int udev_device_tag_index(struct udev_device *dev, struct udev_device *dev_old,
 
 static bool device_has_info(struct udev_device *udev_device)
 {
-	struct udev *udev = udev_device_get_udev(udev_device);
 	struct udev_list_entry *list_entry;
 
 	if (udev_device_get_devlinks_list_entry(udev_device) != NULL)
@@ -90,12 +89,6 @@ static bool device_has_info(struct udev_device *udev_device)
 			return true;
 	if (udev_device_get_tags_list_entry(udev_device) != NULL)
 		return true;
-	if (udev_device_get_devnode(udev_device) != NULL && udev_device_get_knodename(udev_device) != NULL) {
-		size_t devlen = strlen(udev_get_dev_path(udev))+1;
-
-		if (strcmp(&udev_device_get_devnode(udev_device)[devlen], udev_device_get_knodename(udev_device)) != 0)
-			return true;
-	}
 	if (udev_device_get_watch_handle(udev_device) >= 0)
 		return true;
 	return false;
@@ -142,20 +135,22 @@ int udev_device_update_db(struct udev_device *udev_device)
 		fchmod(fileno(f), 01644);
 
 	if (has_info) {
-		size_t devlen = strlen(udev_get_dev_path(udev))+1;
 		struct udev_list_entry *list_entry;
 
-		if (udev_device_get_devnode(udev_device) != NULL) {
-			fprintf(f, "N:%s\n", &udev_device_get_devnode(udev_device)[devlen]);
+		if (major(udev_device_get_devnum(udev_device)) > 0) {
+			size_t devlen = strlen(udev_get_dev_path(udev))+1;
+
 			udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(udev_device))
 				fprintf(f, "S:%s\n", &udev_list_entry_get_name(list_entry)[devlen]);
+			if (udev_device_get_devlink_priority(udev_device) != 0)
+				fprintf(f, "L:%i\n", udev_device_get_devlink_priority(udev_device));
+			if (udev_device_get_watch_handle(udev_device) >= 0)
+				fprintf(f, "W:%i\n", udev_device_get_watch_handle(udev_device));
 		}
-		if (udev_device_get_devlink_priority(udev_device) != 0)
-			fprintf(f, "L:%i\n", udev_device_get_devlink_priority(udev_device));
-		if (udev_device_get_watch_handle(udev_device) >= 0)
-			fprintf(f, "W:%i\n", udev_device_get_watch_handle(udev_device));
+
 		if (udev_device_get_usec_initialized(udev_device) > 0)
 			fprintf(f, "I:%llu\n", udev_device_get_usec_initialized(udev_device));
+
 		udev_list_entry_foreach(list_entry, udev_device_get_properties_list_entry(udev_device)) {
 			if (!udev_list_entry_get_num(list_entry))
 				continue;
@@ -163,6 +158,7 @@ int udev_device_update_db(struct udev_device *udev_device)
 				udev_list_entry_get_name(list_entry),
 				udev_list_entry_get_value(list_entry));
 		}
+
 		udev_list_entry_foreach(list_entry, udev_device_get_tags_list_entry(udev_device))
 			fprintf(f, "G:%s\n", udev_list_entry_get_name(list_entry));
 	}
diff --git a/libudev/libudev-device.c b/libudev/libudev-device.c
index 28df7a2a..e5950bb4 100644
--- a/libudev/libudev-device.c
+++ b/libudev/libudev-device.c
@@ -57,7 +57,6 @@ struct udev_device {
 	char *driver;
 	char *action;
 	char *devpath_old;
-	char *knodename;
 	char *id_filename;
 	char **envp;
 	char *monitor_buf;
@@ -161,23 +160,6 @@ static int udev_device_set_devnum(struct udev_device *udev_device, dev_t devnum)
 	return 0;
 }
 
-const char *udev_device_get_knodename(struct udev_device *udev_device)
-{
-	return udev_device->knodename;
-}
-
-static int udev_device_set_knodename(struct udev_device *udev_device, const char *knodename)
-{
-	free(udev_device->knodename);
-	udev_device->knodename = strdup(knodename);
-	if (udev_device->knodename == NULL)
-		return -ENOMEM;
-	/* do not overwrite the udev property with the kernel property */
-	if (udev_device->devnode == NULL)
-		udev_device_add_property(udev_device, "DEVNAME", udev_device->knodename);
-	return 0;
-}
-
 const char *udev_device_get_devpath_old(struct udev_device *udev_device)
 {
 	return udev_device->devpath_old;
@@ -381,10 +363,7 @@ void udev_device_add_property_from_string_parse(struct udev_device *udev_device,
 	} else if (strncmp(property, "DEVTYPE=", 8) == 0) {
 		udev_device_set_devtype(udev_device, &property[8]);
 	} else if (strncmp(property, "DEVNAME=", 8) == 0) {
-		if (property[8] == '/')
-			udev_device_set_devnode(udev_device, &property[8]);
-		else
-			udev_device_set_knodename(udev_device, &property[8]);
+		udev_device_set_devnode(udev_device, &property[8]);
 	} else if (strncmp(property, "DEVLINKS=", 9) == 0) {
 		char devlinks[UTIL_PATH_SIZE];
 		char *slink;
@@ -516,10 +495,6 @@ int udev_device_read_db(struct udev_device *udev_device, const char *dbfile)
 		line[len-1] = '\0';
 		val = &line[2];
 		switch(line[0]) {
-		case 'N':
-			util_strscpyl(filename, sizeof(filename), udev_get_dev_path(udev_device->udev), "/", val, NULL);
-			udev_device_set_devnode(udev_device, filename);
-			break;
 		case 'S':
 			util_strscpyl(filename, sizeof(filename), udev_get_dev_path(udev_device->udev), "/", val, NULL);
 			udev_device_add_devlink(udev_device, filename, 0);
@@ -582,7 +557,7 @@ int udev_device_read_uevent_file(struct udev_device *udev_device)
 		else if (strncmp(line, "IFINDEX=", 8) == 0)
 			udev_device_set_ifindex(udev_device, strtoull(&line[8], NULL, 10));
 		else if (strncmp(line, "DEVNAME=", 8) == 0)
-			udev_device_set_knodename(udev_device, &line[8]);
+			udev_device_set_devnode(udev_device, &line[8]);
 		else if (strncmp(line, "DEVMODE=", 8) == 0)
 			udev_device->devnode_mode = strtoul(&line[8], NULL, 8);
 
@@ -1073,7 +1048,6 @@ UDEV_EXPORT void udev_device_unref(struct udev_device *udev_device)
 	free(udev_device->action);
 	free(udev_device->driver);
 	free(udev_device->devpath_old);
-	free(udev_device->knodename);
 	free(udev_device->id_filename);
 	free(udev_device->envp);
 	free(udev_device->monitor_buf);
@@ -1152,21 +1126,10 @@ UDEV_EXPORT const char *udev_device_get_devnode(struct udev_device *udev_device)
 {
 	if (udev_device == NULL)
 		return NULL;
-	if (!udev_device->info_loaded) {
-		udev_device_read_uevent_file(udev_device);
-		udev_device_read_db(udev_device, NULL);
-	}
-
-	/* we might get called before we handled an event and have a db, use the kernel-provided name */
-	if (udev_device->devnode == NULL && udev_device_get_knodename(udev_device) != NULL) {
-		char filename[UTIL_NAME_SIZE];
-
-		util_strscpyl(filename, sizeof(filename), udev_get_dev_path(udev_device->udev), "/",
-			      udev_device_get_knodename(udev_device), NULL);
-		udev_device_set_devnode(udev_device, filename);
+	if (udev_device->devnode != NULL)
 		return udev_device->devnode;
-	}
-
+	if (!udev_device->info_loaded)
+		udev_device_read_uevent_file(udev_device);
 	return udev_device->devnode;
 }
 
@@ -1522,7 +1485,12 @@ int udev_device_set_syspath(struct udev_device *udev_device, const char *syspath
 int udev_device_set_devnode(struct udev_device *udev_device, const char *devnode)
 {
 	free(udev_device->devnode);
-	udev_device->devnode = strdup(devnode);
+	if (devnode[0] != '/') {
+		if (asprintf(&udev_device->devnode, "%s/%s", udev_get_dev_path(udev_device->udev), devnode) < 0)
+			udev_device->devnode = NULL;
+	} else {
+		udev_device->devnode = strdup(devnode);
+	}
 	if (udev_device->devnode == NULL)
 		return -ENOMEM;
 	udev_device_add_property(udev_device, "DEVNAME", udev_device->devnode);
diff --git a/libudev/libudev-private.h b/libudev/libudev-private.h
index b86f6a83..83976698 100644
--- a/libudev/libudev-private.h
+++ b/libudev/libudev-private.h
@@ -83,7 +83,6 @@ int udev_device_read_db(struct udev_device *udev_device, const char *dbfile);
 int udev_device_read_uevent_file(struct udev_device *udev_device);
 int udev_device_set_action(struct udev_device *udev_device, const char *action);
 const char *udev_device_get_devpath_old(struct udev_device *udev_device);
-const char *udev_device_get_knodename(struct udev_device *udev_device);
 const char *udev_device_get_id_filename(struct udev_device *udev_device);
 void udev_device_set_is_initialized(struct udev_device *udev_device);
 int udev_device_add_tag(struct udev_device *udev_device, const char *tag);
@@ -187,7 +186,6 @@ uint64_t util_string_bloom64(const char *str);
 int util_create_path(struct udev *udev, const char *path);
 int util_create_path_selinux(struct udev *udev, const char *path);
 int util_delete_path(struct udev *udev, const char *path);
-int util_unlink_secure(struct udev *udev, const char *filename);
 uid_t util_lookup_user(struct udev *udev, const char *user);
 gid_t util_lookup_group(struct udev *udev, const char *group);
 int util_resolve_subsys_kernel(struct udev *udev, const char *string,
diff --git a/libudev/libudev-util-private.c b/libudev/libudev-util-private.c
index 2d7f8dc7..015e6d58 100644
--- a/libudev/libudev-util-private.c
+++ b/libudev/libudev-util-private.c
@@ -113,23 +113,6 @@ int util_delete_path(struct udev *udev, const char *path)
 	return err;
 }
 
-/* Reset permissions on the device node, before unlinking it to make sure,
- * that permissions of possible hard links will be removed too.
- */
-int util_unlink_secure(struct udev *udev, const char *filename)
-{
-	int err;
-
-	chown(filename, 0, 0);
-	chmod(filename, 0000);
-	err = unlink(filename);
-	if (errno == ENOENT)
-		err = 0;
-	if (err)
-		err(udev, "unlink(%s) failed: %m\n", filename);
-	return err;
-}
-
 uid_t util_lookup_user(struct udev *udev, const char *user)
 {
 	char *endptr;
diff --git a/libudev/libudev.c b/libudev/libudev.c
index 93f2d8f1..ca2ac5d0 100644
--- a/libudev/libudev.c
+++ b/libudev/libudev.c
@@ -223,6 +223,10 @@ UDEV_EXPORT struct udev *udev_new(void)
 				set_value(&udev->run_path, val);
 				continue;
 			}
+			if (strcmp(key, "udev_sys") == 0) {
+				set_value(&udev->sys_path, val);
+				continue;
+			}
 			if (strcmp(key, "udev_rules") == 0) {
 				set_value(&udev->rules_path[0], val);
 				udev->rules_path_count = 1;
@@ -237,18 +241,6 @@ UDEV_EXPORT struct udev *udev_new(void)
 	if (env != NULL)
 		udev_set_log_priority(udev, util_log_priority(env));
 
-	env = getenv("UDEV_ROOT");
-	if (env != NULL) {
-		set_value(&udev->dev_path, env);
-		udev_add_property(udev, "UDEV_ROOT", udev->dev_path);
-	}
-
-	env = getenv("SYSFS_PATH");
-	if (env != NULL) {
-		set_value(&udev->sys_path, env);
-		udev_add_property(udev, "SYSFS_PATH", udev->sys_path);
-	}
-
 	/* set defaults */
 	if (udev->dev_path == NULL)
 		if (set_value(&udev->dev_path, "/dev") == NULL)
@@ -401,8 +393,8 @@ int udev_get_rules_path(struct udev *udev, char **path[], unsigned long long *st
  * @udev: udev library context
  *
  * Retrieve the sysfs mount point. The default is "/sys". For
- * testing purposes, it can be overridden with the environment
- * variable SYSFS_PATH.
+ * testing purposes, it can be overridden with udev_sys=
+ * in the udev configuration file.
  *
  * Returns: the sys mount point
  **/
diff --git a/rules/rules.d/60-persistent-storage-tape.rules b/rules/rules.d/60-persistent-storage-tape.rules
index b1a64cee..f2eabd92 100644
--- a/rules/rules.d/60-persistent-storage-tape.rules
+++ b/rules/rules.d/60-persistent-storage-tape.rules
@@ -5,7 +5,7 @@
 ACTION=="remove", GOTO="persistent_storage_tape_end"
 
 # type 8 devices are "Medium Changers"
-SUBSYSTEM=="scsi_generic", SUBSYSTEMS=="scsi", ATTRS{type}=="8", IMPORT{program}="scsi_id --sg-version=3 --export --whitelisted -d $tempnode", \
+SUBSYSTEM=="scsi_generic", SUBSYSTEMS=="scsi", ATTRS{type}=="8", IMPORT{program}="scsi_id --sg-version=3 --export --whitelisted -d $devnode", \
   SYMLINK+="tape/by-id/scsi-$env{ID_SERIAL}"
 
 SUBSYSTEM!="scsi_tape", GOTO="persistent_storage_tape_end"
diff --git a/rules/rules.d/60-persistent-storage.rules b/rules/rules.d/60-persistent-storage.rules
index 9b340334..b7da8b8b 100644
--- a/rules/rules.d/60-persistent-storage.rules
+++ b/rules/rules.d/60-persistent-storage.rules
@@ -27,20 +27,20 @@ KERNEL=="vd*[!0-9]", ATTRS{serial}=="?*", ENV{ID_SERIAL}="$attr{serial}", SYMLIN
 KERNEL=="vd*[0-9]", ATTRS{serial}=="?*", ENV{ID_SERIAL}="$attr{serial}", SYMLINK+="disk/by-id/virtio-$env{ID_SERIAL}-part%n"
 
 # ATA devices with their own "ata" kernel subsystem
-KERNEL=="sd*[!0-9]|sr*", ENV{ID_SERIAL}!="?*", SUBSYSTEMS=="ata", IMPORT{program}="ata_id --export $tempnode"
+KERNEL=="sd*[!0-9]|sr*", ENV{ID_SERIAL}!="?*", SUBSYSTEMS=="ata", IMPORT{program}="ata_id --export $devnode"
 # ATA devices using the "scsi" subsystem
-KERNEL=="sd*[!0-9]|sr*", ENV{ID_SERIAL}!="?*", SUBSYSTEMS=="scsi", ATTRS{vendor}=="ATA", IMPORT{program}="ata_id --export $tempnode"
+KERNEL=="sd*[!0-9]|sr*", ENV{ID_SERIAL}!="?*", SUBSYSTEMS=="scsi", ATTRS{vendor}=="ATA", IMPORT{program}="ata_id --export $devnode"
 # ATA/ATAPI devices (SPC-3 or later) using the "scsi" subsystem
-KERNEL=="sd*[!0-9]|sr*", ENV{ID_SERIAL}!="?*", SUBSYSTEMS=="scsi", ATTRS{type}=="5", ATTRS{scsi_level}=="[6-9]*", IMPORT{program}="ata_id --export $tempnode"
+KERNEL=="sd*[!0-9]|sr*", ENV{ID_SERIAL}!="?*", SUBSYSTEMS=="scsi", ATTRS{type}=="5", ATTRS{scsi_level}=="[6-9]*", IMPORT{program}="ata_id --export $devnode"
 
 # Run ata_id on non-removable USB Mass Storage (SATA/PATA disks in enclosures)
-KERNEL=="sd*[!0-9]|sr*", ENV{ID_SERIAL}!="?*", ATTR{removable}=="0", SUBSYSTEMS=="usb", IMPORT{program}="ata_id --export $tempnode"
+KERNEL=="sd*[!0-9]|sr*", ENV{ID_SERIAL}!="?*", ATTR{removable}=="0", SUBSYSTEMS=="usb", IMPORT{program}="ata_id --export $devnode"
 # Otherwise fall back to using usb_id for USB devices
 KERNEL=="sd*[!0-9]|sr*", ENV{ID_SERIAL}!="?*", SUBSYSTEMS=="usb", IMPORT{builtin}="usb_id"
 
 # scsi devices
-KERNEL=="sd*[!0-9]|sr*", ENV{ID_SERIAL}!="?*", IMPORT{program}="scsi_id --export --whitelisted -d $tempnode", ENV{ID_BUS}="scsi"
-KERNEL=="cciss*", ENV{DEVTYPE}=="disk", ENV{ID_SERIAL}!="?*", IMPORT{program}="scsi_id --export --whitelisted -d $tempnode", ENV{ID_BUS}="cciss"
+KERNEL=="sd*[!0-9]|sr*", ENV{ID_SERIAL}!="?*", IMPORT{program}="scsi_id --export --whitelisted -d $devnode", ENV{ID_BUS}="scsi"
+KERNEL=="cciss*", ENV{DEVTYPE}=="disk", ENV{ID_SERIAL}!="?*", IMPORT{program}="scsi_id --export --whitelisted -d $devnode", ENV{ID_BUS}="cciss"
 KERNEL=="sd*|sr*|cciss*", ENV{DEVTYPE}=="disk", ENV{ID_SERIAL}=="?*", SYMLINK+="disk/by-id/$env{ID_BUS}-$env{ID_SERIAL}"
 KERNEL=="sd*|cciss*", ENV{DEVTYPE}=="partition", ENV{ID_SERIAL}=="?*", SYMLINK+="disk/by-id/$env{ID_BUS}-$env{ID_SERIAL}-part%n"
 
@@ -49,7 +49,7 @@ KERNEL=="sd*[!0-9]|sr*", ATTRS{ieee1394_id}=="?*", SYMLINK+="disk/by-id/ieee1394
 KERNEL=="sd*[0-9]", ATTRS{ieee1394_id}=="?*", SYMLINK+="disk/by-id/ieee1394-$attr{ieee1394_id}-part%n"
 
 # scsi compat links for ATA devices
-KERNEL=="sd*[!0-9]", ENV{ID_BUS}=="ata", PROGRAM="scsi_id --whitelisted --replace-whitespace -p0x80 -d$tempnode", RESULT=="?*", ENV{ID_SCSI_COMPAT}="$result", SYMLINK+="disk/by-id/scsi-$env{ID_SCSI_COMPAT}"
+KERNEL=="sd*[!0-9]", ENV{ID_BUS}=="ata", PROGRAM="scsi_id --whitelisted --replace-whitespace -p0x80 -d $devnode", RESULT=="?*", ENV{ID_SCSI_COMPAT}="$result", SYMLINK+="disk/by-id/scsi-$env{ID_SCSI_COMPAT}"
 KERNEL=="sd*[0-9]", ENV{ID_SCSI_COMPAT}=="?*", SYMLINK+="disk/by-id/scsi-$env{ID_SCSI_COMPAT}-part%n"
 
 KERNEL=="mmcblk[0-9]", SUBSYSTEMS=="mmc", ATTRS{name}=="?*", ATTRS{serial}=="?*", ENV{ID_NAME}="$attr{name}", ENV{ID_SERIAL}="$attr{serial}", SYMLINK+="disk/by-id/mmc-$env{ID_NAME}_$env{ID_SERIAL}"
diff --git a/test/sys/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0/uevent b/test/sys/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0/uevent
index e6caaabf..22f0302e 100644
--- a/test/sys/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0/uevent
+++ b/test/sys/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0/uevent
@@ -1,3 +1,3 @@
-DEVNAME=ttyACM0
 MAJOR=166
 MINOR=0
+DEVNAME=ttyACM0
diff --git a/test/sys/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda5/uevent b/test/sys/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda5/uevent
index 8a871ced..ab7569dc 100644
--- a/test/sys/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda5/uevent
+++ b/test/sys/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda5/uevent
@@ -1,3 +1,4 @@
 MAJOR=8
 MINOR=5
 DEVTYPE=partition
+DEVNAME=sda5
diff --git a/test/sys/devices/virtual/block/fake!blockdev0/uevent b/test/sys/devices/virtual/block/fake!blockdev0/uevent
index 70997d36..6c472ca8 100644
--- a/test/sys/devices/virtual/block/fake!blockdev0/uevent
+++ b/test/sys/devices/virtual/block/fake!blockdev0/uevent
@@ -1,3 +1,4 @@
 MAJOR=7
 MINOR=0
 DEVTYPE=disk
+DEVNAME=fake/blockdev0
diff --git a/test/sys/devices/virtual/misc/misc-fake1/uevent b/test/sys/devices/virtual/misc/misc-fake1/uevent
index 79caac10..67faa81e 100644
--- a/test/sys/devices/virtual/misc/misc-fake1/uevent
+++ b/test/sys/devices/virtual/misc/misc-fake1/uevent
@@ -1,2 +1,4 @@
 MAJOR=4095
 MINOR=1
+DEVNAME=misc-fake1
+
diff --git a/test/sys/devices/virtual/misc/misc-fake89999/uevent b/test/sys/devices/virtual/misc/misc-fake89999/uevent
index 10915df8..53bb34ad 100644
--- a/test/sys/devices/virtual/misc/misc-fake89999/uevent
+++ b/test/sys/devices/virtual/misc/misc-fake89999/uevent
@@ -1,2 +1,3 @@
 MAJOR=4095
 MINOR=89999
+DEVNAME=misc-fake89999
diff --git a/test/sys/devices/virtual/tty/console/uevent b/test/sys/devices/virtual/tty/console/uevent
index 0eaf8b9e..71aad75b 100644
--- a/test/sys/devices/virtual/tty/console/uevent
+++ b/test/sys/devices/virtual/tty/console/uevent
@@ -1,2 +1,3 @@
 MAJOR=5
 MINOR=1
+DEVNAME=console
diff --git a/test/sys/devices/virtual/tty/tty0/uevent b/test/sys/devices/virtual/tty/tty0/uevent
index 11692def..f338919a 100644
--- a/test/sys/devices/virtual/tty/tty0/uevent
+++ b/test/sys/devices/virtual/tty/tty0/uevent
@@ -1,2 +1,3 @@
 MAJOR=4
 MINOR=0
+DEVNAME=tty0
diff --git a/test/sys/devices/virtual/tty/tty33/uevent b/test/sys/devices/virtual/tty/tty33/uevent
index 70a82684..737826b9 100644
--- a/test/sys/devices/virtual/tty/tty33/uevent
+++ b/test/sys/devices/virtual/tty/tty33/uevent
@@ -1,2 +1,3 @@
 MAJOR=4
 MINOR=33
+DEVNAME=tty33
diff --git a/test/udev-test.pl.in b/test/udev-test.pl.in
index 0befc7b5..05055013 100755
--- a/test/udev-test.pl.in
+++ b/test/udev-test.pl.in
@@ -25,14 +25,13 @@ my $sysfs		= "test/sys/";
 my $udev_bin		= "udev/test-udev";
 my $valgrind		= 0;
 my $udev_bin_valgrind	= "valgrind --tool=memcheck --leak-check=yes --quiet $udev_bin";
-my $udev_root		= "udev-root/";
+my $udev_root		= "udev-root";
 my $udev_conf		= "udev-test.conf";
 my $udev_rules		= "udev-test.rules";
 
 my @tests = (
 	{
 		desc		=> "no rules",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "sda" ,
 		exp_rem_error	=> "yes",
@@ -42,7 +41,6 @@ EOF
 	},
 	{
 		desc		=> "label test of scsi disc",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "boot_disk" ,
 		rules		=> <<EOF
@@ -52,7 +50,6 @@ EOF
 	},
 	{
 		desc		=> "label test of scsi disc",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "boot_disk" ,
 		rules		=> <<EOF
@@ -62,7 +59,6 @@ EOF
 	},
 	{
 		desc		=> "label test of scsi disc",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "boot_disk" ,
 		rules		=> <<EOF
@@ -72,7 +68,6 @@ EOF
 	},
 	{
 		desc		=> "label test of scsi partition",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda1",
 		exp_name	=> "boot_disk1" ,
 		rules		=> <<EOF
@@ -81,7 +76,6 @@ EOF
 	},
 	{
 		desc		=> "label test of pattern match",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda1",
 		exp_name	=> "boot_disk1" ,
 		rules		=> <<EOF
@@ -93,7 +87,6 @@ EOF
 	},
 	{
 		desc		=> "label test of multiple sysfs files",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda1",
 		exp_name	=> "boot_disk1" ,
 		rules		=> <<EOF
@@ -103,7 +96,6 @@ EOF
 	},
 	{
 		desc		=> "label test of max sysfs files (skip invalid rule)",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda1",
 		exp_name	=> "boot_disk1" ,
 		rules		=> <<EOF
@@ -113,7 +105,6 @@ EOF
 	},
 	{
 		desc		=> "catch device by *",
-		subsys		=> "tty",
 		devpath		=> "/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0",
 		exp_name	=> "modem/0" ,
 		rules		=> <<EOF
@@ -122,7 +113,6 @@ EOF
 	},
 	{
 		desc		=> "catch device by * - take 2",
-		subsys		=> "tty",
 		devpath		=> "/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0",
 		exp_name	=> "modem/0" ,
 		rules		=> <<EOF
@@ -132,7 +122,6 @@ EOF
 	},
 	{
 		desc		=> "catch device by ?",
-		subsys		=> "tty",
 		devpath		=> "/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0",
 		exp_name	=> "modem/0" ,
 		rules		=> <<EOF
@@ -143,7 +132,6 @@ EOF
 	},
 	{
 		desc		=> "catch device by character class",
-		subsys		=> "tty",
 		devpath		=> "/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0",
 		exp_name	=> "modem/0" ,
 		rules		=> <<EOF
@@ -154,7 +142,6 @@ EOF
 	},
 	{
 		desc		=> "replace kernel name",
-		subsys		=> "tty",
 		devpath		=> "/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0",
 		exp_name	=> "modem" ,
 		rules		=> <<EOF
@@ -163,7 +150,6 @@ EOF
 	},
 	{
 		desc		=> "Handle comment lines in config file (and replace kernel name)",
-		subsys		=> "tty",
 		devpath		=> "/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0",
 		exp_name	=> "modem" ,
 		rules		=> <<EOF
@@ -174,7 +160,6 @@ EOF
 	},
 	{
 		desc		=> "Handle comment lines in config file with whitespace (and replace kernel name)",
-		subsys		=> "tty",
 		devpath		=> "/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0",
 		exp_name	=> "modem" ,
 		rules		=> <<EOF
@@ -185,7 +170,6 @@ EOF
 	},
 	{
 		desc		=> "Handle whitespace only lines (and replace kernel name)",
-		subsys		=> "tty",
 		devpath		=> "/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0",
 		exp_name	=> "whitespace" ,
 		rules		=> <<EOF
@@ -201,7 +185,6 @@ EOF
 	},
 	{
 		desc		=> "Handle empty lines in config file (and replace kernel name)",
-		subsys		=> "tty",
 		devpath		=> "/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0",
 		exp_name	=> "modem" ,
 		rules		=> <<EOF
@@ -212,7 +195,6 @@ EOF
 	},
 	{
 		desc		=> "Handle backslashed multi lines in config file (and replace kernel name)",
-		subsys		=> "tty",
 		devpath		=> "/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0",
 		exp_name	=> "modem" ,
 		rules		=> <<EOF
@@ -223,7 +205,6 @@ EOF
 	},
 	{
 		desc		=> "preserve backslashes, if they are not for a newline",
-		subsys		=> "tty",
 		devpath		=> "/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0",
 		exp_name	=> "aaa",
 		rules		=> <<EOF
@@ -232,7 +213,6 @@ EOF
 	},
 	{
 		desc		=> "Handle stupid backslashed multi lines in config file (and replace kernel name)",
-		subsys		=> "tty",
 		devpath		=> "/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0",
 		exp_name	=> "modem" ,
 		rules		=> <<EOF
@@ -251,7 +231,6 @@ EOF
 	},
 	{
 		desc		=> "subdirectory handling",
-		subsys		=> "tty",
 		devpath		=> "/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0",
 		exp_name	=> "sub/direct/ory/modem" ,
 		rules		=> <<EOF
@@ -260,7 +239,6 @@ EOF
 	},
 	{
 		desc		=> "parent device name match of scsi partition",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda5",
 		exp_name	=> "first_disk5" ,
 		rules		=> <<EOF
@@ -269,7 +247,6 @@ EOF
 	},
 	{
 		desc		=> "test substitution chars",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda5",
 		exp_name	=> "Major:8:minor:5:kernelnumber:5:id:0:0:0:0" ,
 		rules		=> <<EOF
@@ -278,7 +255,6 @@ EOF
 	},
 	{
 		desc		=> "import of shell-value file",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "subdir/err/node" ,
 		rules		=> <<EOF
@@ -288,7 +264,6 @@ EOF
 	},
 	{
 		desc		=> "import of shell-value returned from program",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "node12345678",
 		rules		=> <<EOF
@@ -298,7 +273,6 @@ EOF
 	},
 	{
 		desc		=> "sustitution of sysfs value (%s{file})",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "disk-ATA-sda" ,
 		rules		=> <<EOF
@@ -308,7 +282,6 @@ EOF
 	},
 	{
 		desc		=> "program result substitution",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda5",
 		exp_name	=> "special-device-5" ,
 		not_exp_name	=> "not" ,
@@ -319,7 +292,6 @@ EOF
 	},
 	{
 		desc		=> "program result substitution (newline removal)",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda5",
 		exp_name	=> "newline_removed" ,
 		rules		=> <<EOF
@@ -328,7 +300,6 @@ EOF
 	},
 	{
 		desc		=> "program result substitution",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda5",
 		exp_name	=> "test-0:0:0:0" ,
 		rules		=> <<EOF
@@ -337,7 +308,6 @@ EOF
 	},
 	{
 		desc		=> "program with lots of arguments",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda5",
 		exp_name	=> "foo9" ,
 		rules		=> <<EOF
@@ -346,7 +316,6 @@ EOF
 	},
 	{
 		desc		=> "program with subshell",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda5",
 		exp_name	=> "bar9" ,
 		rules		=> <<EOF
@@ -355,7 +324,6 @@ EOF
 	},
 	{
 		desc		=> "program arguments combined with apostrophes",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda5",
 		exp_name	=> "foo7" ,
 		rules		=> <<EOF
@@ -364,7 +332,6 @@ EOF
 	},
 	{
 		desc		=> "characters before the %c{N} substitution",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda5",
 		exp_name	=> "my-foo9" ,
 		rules		=> <<EOF
@@ -373,7 +340,6 @@ EOF
 	},
 	{
 		desc		=> "substitute the second to last argument",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda5",
 		exp_name	=> "my-foo8" ,
 		rules		=> <<EOF
@@ -382,7 +348,6 @@ EOF
 	},
 	{
 		desc		=> "test substitution by variable name",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda5",
 		exp_name	=> "Major:8-minor:5-kernelnumber:5-id:0:0:0:0",
 		rules		=> <<EOF
@@ -391,7 +356,6 @@ EOF
 	},
 	{
 		desc		=> "test substitution by variable name 2",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda5",
 		exp_name	=> "Major:8-minor:5-kernelnumber:5-id:0:0:0:0",
 		rules		=> <<EOF
@@ -400,7 +364,6 @@ EOF
 	},
 	{
 		desc		=> "test substitution by variable name 3",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda5",
 		exp_name	=> "850:0:0:05" ,
 		rules		=> <<EOF
@@ -409,7 +372,6 @@ EOF
 	},
 	{
 		desc		=> "test substitution by variable name 4",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda5",
 		exp_name	=> "855" ,
 		rules		=> <<EOF
@@ -418,7 +380,6 @@ EOF
 	},
 	{
 		desc		=> "test substitution by variable name 5",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda5",
 		exp_name	=> "8550:0:0:0" ,
 		rules		=> <<EOF
@@ -427,7 +388,6 @@ EOF
 	},
 	{
 		desc		=> "non matching SUBSYSTEMS for device with no parent",
-		subsys		=> "tty",
 		devpath		=> "/devices/virtual/tty/console",
 		exp_name	=> "TTY",
 		rules		=> <<EOF
@@ -437,7 +397,6 @@ EOF
 	},
 	{
 		desc		=> "non matching SUBSYSTEMS",
-		subsys		=> "tty",
 		devpath		=> "/devices/virtual/tty/console",
 		exp_name	=> "TTY" ,
 		rules		=> <<EOF
@@ -447,7 +406,6 @@ EOF
 	},
 	{
 		desc		=> "ATTRS match",
-		subsys		=> "tty",
 		devpath		=> "/devices/virtual/tty/console",
 		exp_name	=> "foo" ,
 		rules		=> <<EOF
@@ -457,7 +415,6 @@ EOF
 	},
 	{
 		desc		=> "ATTR (empty file)",
-		subsys		=> "tty",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "empty" ,
 		rules		=> <<EOF
@@ -469,7 +426,6 @@ EOF
 	},
 	{
 		desc		=> "ATTR (non-existent file)",
-		subsys		=> "tty",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "non-existent" ,
 		rules		=> <<EOF
@@ -483,7 +439,6 @@ EOF
 	},
 	{
 		desc		=> "program and bus type match",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "scsi-0:0:0:0" ,
 		rules		=> <<EOF
@@ -494,7 +449,6 @@ EOF
 	},
 	{
 		desc		=> "sysfs parent hierarchy",
-		subsys		=> "tty",
 		devpath		=> "/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0",
 		exp_name	=> "modem" ,
 		rules		=> <<EOF
@@ -503,7 +457,6 @@ EOF
 	},
 	{
 		desc		=> "name test with ! in the name",
-		subsys		=> "block",
 		devpath		=> "/devices/virtual/block/fake!blockdev0",
 		exp_name	=> "is/a/fake/blockdev0" ,
 		rules		=> <<EOF
@@ -514,7 +467,6 @@ EOF
 	},
 	{
 		desc		=> "name test with ! in the name, but no matching rule",
-		subsys		=> "block",
 		devpath		=> "/devices/virtual/block/fake!blockdev0",
 		exp_name	=> "fake/blockdev0" ,
 		exp_rem_error	=> "yes",
@@ -524,7 +476,6 @@ EOF
 	},
 	{
 		desc		=> "KERNELS rule",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "scsi-0:0:0:0",
 		rules		=> <<EOF
@@ -537,7 +488,6 @@ EOF
 	},
 	{
 		desc		=> "KERNELS wildcard all",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "scsi-0:0:0:0",
 		rules		=> <<EOF
@@ -550,7 +500,6 @@ EOF
 	},
 	{
 		desc		=> "KERNELS wildcard partial",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "scsi-0:0:0:0",
 		rules		=> <<EOF
@@ -560,7 +509,6 @@ EOF
 	},
 	{
 		desc		=> "KERNELS wildcard partial 2",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "scsi-0:0:0:0",
 		rules		=> <<EOF
@@ -570,7 +518,6 @@ EOF
 	},
 	{
 		desc		=> "substitute attr with link target value (first match)",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "driver-is-sd",
 		rules		=> <<EOF
@@ -579,7 +526,6 @@ EOF
 	},
 	{
 		desc		=> "substitute attr with link target value (currently selected device)",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "driver-is-ahci",
 		rules		=> <<EOF
@@ -588,7 +534,6 @@ EOF
 	},
 	{
 		desc		=> "ignore ATTRS attribute whitespace",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "ignored",
 		rules		=> <<EOF
@@ -597,7 +542,6 @@ EOF
 	},
 	{
 		desc		=> "do not ignore ATTRS attribute whitespace",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "matched-with-space",
 		rules		=> <<EOF
@@ -607,7 +551,6 @@ EOF
 	},
 	{
 		desc		=> "permissions USER=bad GROUP=name",
-		subsys		=> "tty",
 		devpath		=> "/devices/virtual/tty/tty33",
 		exp_name	=> "tty33",
 		exp_perms	=> "0:0:0600",
@@ -617,7 +560,6 @@ EOF
 	},
 	{
 		desc		=> "permissions OWNER=5000",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "node",
 		exp_perms	=> "5000::0600",
@@ -627,7 +569,6 @@ EOF
 	},
 	{
 		desc		=> "permissions GROUP=100",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "node",
 		exp_perms	=> ":100:0660",
@@ -637,7 +578,6 @@ EOF
 	},
 	{
 		desc		=> "textual user id",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "node",
 		exp_perms	=> "nobody::0600",
@@ -647,7 +587,6 @@ EOF
 	},
 	{
 		desc		=> "textual group id",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "node",
 		exp_perms	=> ":daemon:0660",
@@ -657,7 +596,6 @@ EOF
 	},
 	{
 		desc		=> "textual user/group id",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "node",
 		exp_perms	=> "root:mail:0660",
@@ -667,7 +605,6 @@ EOF
 	},
 	{
 		desc		=> "permissions MODE=0777",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "node",
 		exp_perms	=> "::0777",
@@ -677,7 +614,6 @@ EOF
 	},
 	{
 		desc		=> "permissions OWNER=5000 GROUP=100 MODE=0777",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "node",
 		exp_perms	=> "5000:100:0777",
@@ -687,7 +623,6 @@ EOF
 	},
 	{
 		desc		=> "permissions OWNER to 5000",
-		subsys		=> "tty",
 		devpath		=> "/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0",
 		exp_name	=> "ttyACM0",
 		exp_perms	=> "5000::",
@@ -697,7 +632,6 @@ EOF
 	},
 	{
 		desc		=> "permissions GROUP to 100",
-		subsys		=> "tty",
 		devpath		=> "/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0",
 		exp_name	=> "ttyACM0",
 		exp_perms	=> ":100:0660",
@@ -707,7 +641,6 @@ EOF
 	},
 	{
 		desc		=> "permissions MODE to 0060",
-		subsys		=> "tty",
 		devpath		=> "/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0",
 		exp_name	=> "ttyACM0",
 		exp_perms	=> "::0060",
@@ -717,7 +650,6 @@ EOF
 	},
 	{
 		desc		=> "permissions OWNER, GROUP, MODE",
-		subsys		=> "tty",
 		devpath		=> "/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0",
 		exp_name	=> "ttyACM0",
 		exp_perms	=> "5000:100:0777",
@@ -727,7 +659,6 @@ EOF
 	},
 	{
 		desc		=> "permissions only rule",
-		subsys		=> "tty",
 		devpath		=> "/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0",
 		exp_name	=> "ttyACM0",
 		exp_perms	=> "5000:100:0777",
@@ -739,7 +670,6 @@ EOF
 	},
 	{
 		desc		=> "multiple permissions only rule",
-		subsys		=> "tty",
 		devpath		=> "/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0",
 		exp_name	=> "ttyACM0",
 		exp_perms	=> "3000:4000:0777",
@@ -753,7 +683,6 @@ EOF
 	},
 	{
 		desc		=> "permissions only rule with override at SYMLINK+ rule",
-		subsys		=> "tty",
 		devpath		=> "/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0",
 		exp_name	=> "ttyACM0",
 		exp_perms	=> "3000:8000:0777",
@@ -767,7 +696,6 @@ EOF
 	},
 	{
 		desc		=> "major/minor number test",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "node",
 		exp_majorminor	=> "8:0",
@@ -777,7 +705,6 @@ EOF
 	},
 	{
 		desc		=> "big major number test",
-		subsys		=> "misc",
 		devpath		=> "/devices/virtual/misc/misc-fake1",
 		exp_name	=> "node",
 		exp_majorminor	=> "4095:1",
@@ -787,7 +714,6 @@ EOF
 	},
 	{
 		desc		=> "big major and big minor number test",
-		subsys		=> "misc",
 		devpath		=> "/devices/virtual/misc/misc-fake89999",
 		exp_name	=> "node",
 		exp_majorminor	=> "4095:89999",
@@ -797,7 +723,6 @@ EOF
 	},
 	{
 		desc		=> "multiple symlinks with format char",
-		subsys		=> "tty",
 		devpath		=> "/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0",
 		exp_name	=> "symlink2-ttyACM0",
 		rules		=> <<EOF
@@ -806,7 +731,6 @@ EOF
 	},
 	{
 		desc		=> "multiple symlinks with a lot of s p a c e s",
-		subsys		=> "tty",
 		devpath		=> "/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0",
 		exp_name	=> "one",
 		not_exp_name	=> " ",
@@ -816,7 +740,6 @@ EOF
 	},
 	{
 		desc		=> "symlink creation (same directory)",
-		subsys		=> "tty",
 		devpath		=> "/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0",
 		exp_name	=> "modem0",
 		rules		=> <<EOF
@@ -824,30 +747,7 @@ KERNEL=="ttyACM[0-9]*", SYMLINK+="ttyACM%n", SYMLINK="modem%n"
 EOF
 	},
 	{
-		desc		=> "symlink creation (relative link forward)",
-		subsys		=> "block",
-		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda6",
-		exp_name	=> "1/2/symlink" ,
-		exp_target	=> "a/b/node",
-		exp_rem_error	=> "yes",
-		rules		=> <<EOF
-SUBSYSTEMS=="scsi", ATTRS{vendor}=="ATA", NAME="1/2/a/b/node", SYMLINK+="1/2/symlink"
-EOF
-	},
-	{
-		desc		=> "symlink creation (relative link back and forward)",
-		subsys		=> "block",
-		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda6",
-		exp_name	=> "1/2/c/d/symlink" ,
-		exp_target	=> "../../a/b/node",
-		exp_rem_error	=> "yes",
-		rules		=> <<EOF
-SUBSYSTEMS=="scsi", ATTRS{vendor}=="ATA", NAME="1/2/a/b/node", SYMLINK+="1/2/c/d/symlink"
-EOF
-	},
-	{
 		desc		=> "multiple symlinks",
-		subsys		=> "tty",
 		devpath		=> "/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0",
 		exp_name	=> "second-0" ,
 		rules		=> <<EOF
@@ -856,7 +756,6 @@ EOF
 	},
 	{
 		desc		=> "symlink name '.'",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> ".",
 		exp_add_error	=> "yes",
@@ -867,7 +766,6 @@ EOF
 	},
 	{
 		desc		=> "symlink node to itself",
-		subsys		=> "tty",
 		devpath		=> "/devices/virtual/tty/tty0",
 		exp_name	=> "link",
 		exp_add_error	=> "yes",
@@ -879,7 +777,6 @@ EOF
 	},
 	{
 		desc		=> "symlink %n substitution",
-		subsys		=> "tty",
 		devpath		=> "/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0",
 		exp_name	=> "symlink0",
 		rules		=> <<EOF
@@ -888,7 +785,6 @@ EOF
 	},
 	{
 		desc		=> "symlink %k substitution",
-		subsys		=> "tty",
 		devpath		=> "/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0",
 		exp_name	=> "symlink-ttyACM0",
 		rules		=> <<EOF
@@ -897,7 +793,6 @@ EOF
 	},
 	{
 		desc		=> "symlink %M:%m substitution",
-		subsys		=> "tty",
 		devpath		=> "/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0",
 		exp_name	=> "major-166:0",
 		rules		=> <<EOF
@@ -906,17 +801,14 @@ EOF
 	},
 	{
 		desc		=> "symlink %b substitution",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "symlink-0:0:0:0",
-		exp_target	=> "node",
 		rules		=> <<EOF
-SUBSYSTEMS=="scsi", KERNEL=="sda", NAME="node", SYMLINK+="symlink-%b"
+SUBSYSTEMS=="scsi", KERNEL=="sda", SYMLINK+="symlink-%b"
 EOF
 	},
 	{
 		desc		=> "symlink %c substitution",
-		subsys		=> "tty",
 		devpath		=> "/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0",
 		exp_name	=> "test",
 		rules		=> <<EOF
@@ -925,7 +817,6 @@ EOF
 	},
 	{
 		desc		=> "symlink %c{N} substitution",
-		subsys		=> "tty",
 		devpath		=> "/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0",
 		exp_name	=> "test",
 		rules		=> <<EOF
@@ -934,7 +825,6 @@ EOF
 	},
 	{
 		desc		=> "symlink %c{N+} substitution",
-		subsys		=> "tty",
 		devpath		=> "/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0",
 		exp_name	=> "this",
 		rules		=> <<EOF
@@ -943,7 +833,6 @@ EOF
 	},
 	{
 		desc		=> "symlink only rule with %c{N+}",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "test",
 		rules		=> <<EOF
@@ -952,7 +841,6 @@ EOF
 	},
 	{
 		desc		=> "symlink %s{filename} substitution",
-		subsys		=> "tty",
 		devpath		=> "/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0",
 		exp_name	=> "166:0",
 		rules		=> <<EOF
@@ -961,7 +849,6 @@ EOF
 	},
 	{
 		desc		=> "program result substitution (numbered part of)",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda5",
 		exp_name	=> "link1",
 		rules		=> <<EOF
@@ -970,7 +857,6 @@ EOF
 	},
 	{
 		desc		=> "program result substitution (numbered part of+)",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda5",
 		exp_name	=> "link4",
 		rules		=> <<EOF
@@ -979,7 +865,6 @@ EOF
 	},
 	{
 		desc		=> "SUBSYSTEM match test",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "node",
 		rules		=> <<EOF
@@ -990,7 +875,6 @@ EOF
 	},
 	{
 		desc		=> "DRIVERS match test",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "node",
 		rules		=> <<EOF
@@ -999,38 +883,23 @@ SUBSYSTEMS=="scsi", KERNEL=="sda", SYMLINK+="node", DRIVERS=="sd"
 EOF
 	},
 	{
-		desc		=> "temporary node creation test",
-		subsys		=> "block",
+		desc		=> "devnode substitution test",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "node",
 		rules		=> <<EOF
-SUBSYSTEMS=="scsi", KERNEL=="sda", PROGRAM=="/usr@rootprefix@/bin/test -b %N" SYMLINK+="node"
-EOF
-	},
-	{
-		desc		=> "parent node name substitution test sequence 1/2 (keep)",
-		subsys		=> "block",
-		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
-		exp_name	=> "main_device",
-		option		=> "keep",
-		exp_rem_error	=> "yes",
-		rules		=> <<EOF
-SUBSYSTEMS=="scsi", KERNEL=="sda", NAME="main_device"
+SUBSYSTEMS=="scsi", KERNEL=="sda", PROGRAM=="/usr/bin/test -b %N" SYMLINK+="node"
 EOF
 	},
 	{
-		desc		=> "parent node name substitution test sequence 2/2 (clean)",
-		subsys		=> "block",
+		desc		=> "parent node name substitution test",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda1",
-		exp_name	=> "main_device-part-1",
-		option		=> "clean",
+		exp_name	=> "sda-part-1",
 		rules		=> <<EOF
 SUBSYSTEMS=="scsi", KERNEL=="sda1", SYMLINK+="%P-part-1"
 EOF
 	},
 	{
 		desc		=> "udev_root substitution",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda1",
 		exp_name	=> "start-udev-root-end",
 		rules		=> <<EOF
@@ -1039,7 +908,6 @@ EOF
 	},
 	{
 		desc		=> "last_rule option",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda1",
 		exp_name	=> "last",
 		rules		=> <<EOF
@@ -1049,7 +917,6 @@ EOF
 	},
 	{
 		desc		=> "negation KERNEL!=",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda1",
 		exp_name	=> "match",
 		rules		=> <<EOF
@@ -1060,7 +927,6 @@ EOF
 	},
 	{
 		desc		=> "negation SUBSYSTEM!=",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda1",
 		exp_name	=> "not-anything",
 		rules		=> <<EOF
@@ -1071,7 +937,6 @@ EOF
 	},
 	{
 		desc		=> "negation PROGRAM!= exit code",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda1",
 		exp_name	=> "nonzero-program",
 		rules		=> <<EOF
@@ -1081,7 +946,6 @@ EOF
 	},
 	{
 		desc		=> "test for whitespace between the operator",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda1",
 		exp_name	=> "true",
 		rules		=> <<EOF
@@ -1091,7 +955,6 @@ EOF
 	},
 	{
 		desc		=> "ENV{} test",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda1",
 		exp_name	=> "true",
 		rules		=> <<EOF
@@ -1103,7 +966,6 @@ EOF
 	},
 	{
 		desc		=> "ENV{} test",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda1",
 		exp_name	=> "true",
 		rules		=> <<EOF
@@ -1116,7 +978,6 @@ EOF
 	},
 	{
 		desc		=> "ENV{} test (assign)",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda1",
 		exp_name	=> "true",
 		rules		=> <<EOF
@@ -1128,7 +989,6 @@ EOF
 	},
 	{
 		desc		=> "ENV{} test (assign 2 times)",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda1",
 		exp_name	=> "true",
 		rules		=> <<EOF
@@ -1141,7 +1001,6 @@ EOF
 	},
 	{
 		desc		=> "ENV{} test (assign2)",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda1",
 		exp_name	=> "part",
 		rules		=> <<EOF
@@ -1154,7 +1013,6 @@ EOF
 	},
 	{
 		desc		=> "untrusted string sanitize",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda1",
 		exp_name	=> "sane",
 		rules		=> <<EOF
@@ -1163,7 +1021,6 @@ EOF
 	},
 	{
 		desc		=> "untrusted string sanitize (don't replace utf8)",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda1",
 		exp_name	=> "uber",
 		rules		=> <<EOF
@@ -1172,7 +1029,6 @@ EOF
 	},
 	{
 		desc		=> "untrusted string sanitize (replace invalid utf8)",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda1",
 		exp_name	=> "replaced",
 		rules		=> <<EOF
@@ -1181,7 +1037,6 @@ EOF
 	},
 	{
 		desc		=> "read sysfs value from parent device",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0",
 		exp_name	=> "serial-354172020305000",
 		rules		=> <<EOF
@@ -1190,7 +1045,6 @@ EOF
 	},
 	{
 		desc		=> "match against empty key string",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "ok",
 		rules		=> <<EOF
@@ -1202,7 +1056,6 @@ EOF
 	},
 	{
 		desc		=> "check ACTION value",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "ok",
 		rules		=> <<EOF
@@ -1211,19 +1064,7 @@ ACTION=="add", KERNEL=="sda", SYMLINK+="ok"
 EOF
 	},
 	{
-		desc		=> "test RUN key remove",
-		subsys		=> "block",
-		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
-		exp_name	=> "testsymlink2",
-		exp_target	=> "ok2",
-		rules		=> <<EOF
-KERNEL=="sda", NAME="ok2", RUN+="@rootprefix@/bin/ln -s ok2 %r/testsymlink2"
-KERNEL=="sda", ACTION=="remove", RUN+="@rootprefix@/bin/rm -f %r/testsymlink2"
-EOF
-	},
-	{
 		desc		=> "final assignment",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "ok",
 		exp_perms	=> "root:tty:0640",
@@ -1234,7 +1075,6 @@ EOF
 	},
 	{
 		desc		=> "final assignment 2",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "ok",
 		exp_perms	=> "root:tty:0640",
@@ -1246,7 +1086,6 @@ EOF
 	},
 	{
 		desc		=> "env substitution",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "node-add-me",
 		rules		=> <<EOF
@@ -1255,7 +1094,6 @@ EOF
 	},
 	{
 		desc		=> "reset list to current value",
-		subsys		=> "tty",
 		devpath		=> "/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0",
 		exp_name	=> "three",
 		not_exp_name	=> "two",
@@ -1267,7 +1105,6 @@ EOF
 	},
 	{
 		desc		=> "test empty SYMLINK+ (empty override)",
-		subsys		=> "tty",
 		devpath		=> "/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0",
 		exp_name	=> "right",
 		not_exp_name	=> "wrong",
@@ -1279,7 +1116,6 @@ EOF
 	},
 	{
 		desc		=> "test multi matches",
-		subsys		=> "tty",
 		devpath		=> "/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0",
 		exp_name	=> "right",
 		rules		=> <<EOF
@@ -1289,7 +1125,6 @@ EOF
 	},
 	{
 		desc		=> "test multi matches 2",
-		subsys		=> "tty",
 		devpath		=> "/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0",
 		exp_name	=> "right",
 		rules		=> <<EOF
@@ -1300,7 +1135,6 @@ EOF
 	},
 	{
 		desc		=> "test multi matches 3",
-		subsys		=> "tty",
 		devpath		=> "/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0",
 		exp_name	=> "right",
 		rules		=> <<EOF
@@ -1312,7 +1146,6 @@ EOF
 	},
 	{
 		desc		=> "test multi matches 4",
-		subsys		=> "tty",
 		devpath		=> "/devices/pci0000:00/0000:00:1d.7/usb5/5-2/5-2:1.0/tty/ttyACM0",
 		exp_name	=> "right",
 		rules		=> <<EOF
@@ -1325,7 +1158,6 @@ EOF
 	},
 	{
 		desc		=> "IMPORT parent test sequence 1/2 (keep)",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "parent",
 		option		=> "keep",
@@ -1336,7 +1168,6 @@ EOF
 	},
 	{
 		desc		=> "IMPORT parent test sequence 2/2 (keep)",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda1",
 		exp_name	=> "parentenv-parent_right",
 		option		=> "clean",
@@ -1346,7 +1177,6 @@ EOF
 	},
 	{
 		desc		=> "GOTO test",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda1",
 		exp_name	=> "right",
 		rules		=> <<EOF
@@ -1361,7 +1191,6 @@ EOF
 	},
 	{
 		desc		=> "GOTO label does not exist",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda1",
 		exp_name	=> "right",
 		rules		=> <<EOF
@@ -1372,7 +1201,6 @@ EOF
 	},
 	{
 		desc		=> "SYMLINK+ compare test",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda1",
 		exp_name	=> "right",
 		not_exp_name	=> "wrong",
@@ -1384,7 +1212,6 @@ EOF
 	},
 	{
 		desc		=> "invalid key operation",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda1",
 		exp_name	=> "yes",
 		rules		=> <<EOF
@@ -1394,7 +1221,6 @@ EOF
 	},
 	{
 		desc		=> "operator chars in attribute",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "yes",
 		rules		=> <<EOF
@@ -1403,7 +1229,6 @@ EOF
 	},
 	{
 		desc		=> "overlong comment line",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda/sda1",
 		exp_name	=> "yes",
 		rules		=> <<EOF
@@ -1415,7 +1240,6 @@ EOF
 	},
 	{
 		desc		=> "magic subsys/kernel lookup",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "00:16:41:e2:8d:ff",
 		rules		=> <<EOF
@@ -1424,7 +1248,6 @@ EOF
 	},
 	{
 		desc		=> "TEST absolute path",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "there",
 		rules		=> <<EOF
@@ -1434,7 +1257,6 @@ EOF
 	},
 	{
 		desc		=> "TEST subsys/kernel lookup",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "yes",
 		rules		=> <<EOF
@@ -1443,7 +1265,6 @@ EOF
 	},
 	{
 		desc		=> "TEST relative path",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "relative",
 		rules		=> <<EOF
@@ -1452,7 +1273,6 @@ EOF
 	},
 	{
 		desc		=> "TEST wildcard substitution (find queue/nr_requests)",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "found-subdir",
 		rules		=> <<EOF
@@ -1461,7 +1281,6 @@ EOF
 	},
 	{
 		desc		=> "TEST MODE=0000",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "sda",
 		exp_perms	=> "0:0:0000",
@@ -1472,7 +1291,6 @@ EOF
 	},
 	{
 		desc		=> "TEST PROGRAM feeds OWNER, GROUP, MODE",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "sda",
 		exp_perms	=> "5000:100:0400",
@@ -1484,7 +1302,6 @@ EOF
 	},
 	{
 		desc		=> "TEST PROGRAM feeds MODE with overflow",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "sda",
 		exp_perms	=> "0:0:0440",
@@ -1496,7 +1313,6 @@ EOF
 	},
 	{
 		desc		=> "magic [subsys/sysname] attribute substitution",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "sda-8741C4G-end",
 		exp_perms	=> "0:0:0600",
@@ -1508,7 +1324,6 @@ EOF
 	},
 	{
 		desc		=> "builtin path_id",
-		subsys		=> "block",
 		devpath		=> "/devices/pci0000:00/0000:00:1f.2/host0/target0:0:0/0:0:0:0/block/sda",
 		exp_name	=> "disk/by-path/pci-0000:00:1f.2-scsi-0:0:0:0",
 		rules		=> <<EOF
@@ -1519,25 +1334,20 @@ EOF
 );
 
 # set env
-$ENV{SYSFS_PATH} = $sysfs;
 $ENV{UDEV_CONFIG_FILE} = $udev_conf;
 
 sub udev {
-	my ($action, $subsys, $devpath, $rules) = @_;
-
-	$ENV{DEVPATH} = $devpath;
+	my ($action, $devpath, $rules) = @_;
 
 	# create temporary rules
 	open CONF, ">$udev_rules" || die "unable to create rules file: $udev_rules";
 	print CONF $$rules;
 	close CONF;
 
-	$ENV{ACTION} = $action;
-	$ENV{SUBSYSTEM} = $subsys;
 	if ($valgrind > 0) {
-		system("$udev_bin_valgrind");
+		system("$udev_bin_valgrind $action $devpath");
 	} else {
-		system("$udev_bin");
+		system("$udev_bin $action $devpath");
 	}
 }
 
@@ -1606,39 +1416,6 @@ sub major_minor_test {
 	}
 }
 
-sub symlink_test {
-	my ($rules) = @_;
-
-	my $output = `ls -l $PWD/$udev_root$rules->{exp_name}`;
-
-	if ($output =~ m/(.*)-> (.*)/) {
-		if ($2 eq $rules->{exp_target}) {
-			print "symlink:     ok\n";
-		} else {
-			print "  expected symlink from: \'$rules->{exp_name}\' to \'$rules->{exp_target}\'\n";
-			print "  created symlink from: \'$rules->{exp_name}\' to \'$2\'\n";
-			print "symlink: error";
-			if ($rules->{exp_add_error}) {
-				print " as expected\n";
-			} else {
-				print "\n";
-				$error++;
-				sleep(1);
-			}
-		}
-	} else {
-		print "  expected symlink from: \'$rules->{exp_name}\' to \'$rules->{exp_target}\'\n";
-		print "symlink:     not created";
-		if ($rules->{exp_add_error}) {
-			print " as expected\n";
-		} else {
-			print "\n";
-			$error++;
-			sleep(1);
-		}
-	}
-}
-
 sub make_udev_root {
 	system("rm -rf $udev_root");
 	mkdir($udev_root) || die "unable to create udev_root: $udev_root\n";
@@ -1652,29 +1429,23 @@ sub run_test {
 	my ($rules, $number) = @_;
 
 	print "TEST $number: $rules->{desc}\n";
+	print "device \'$rules->{devpath}\' expecting node/link \'$rules->{exp_name}\'\n";
 
-	if ($rules->{exp_target}) {
-		print "device \'$rules->{devpath}\' expecting link '$rules->{exp_name}' to node \'$rules->{exp_target}\'\n";
-	} else {
-		print "device \'$rules->{devpath}\' expecting node/link \'$rules->{exp_name}\'\n";
-	}
-
-
-	udev("add", $rules->{subsys}, $rules->{devpath}, \$rules->{rules});
+	udev("add", $rules->{devpath}, \$rules->{rules});
 	if (defined($rules->{not_exp_name})) {
-		if ((-e "$PWD/$udev_root$rules->{not_exp_name}") ||
-		    (-l "$PWD/$udev_root$rules->{not_exp_name}")) {
+		if ((-e "$PWD/$udev_root/$rules->{not_exp_name}") ||
+		    (-l "$PWD/$udev_root/$rules->{not_exp_name}")) {
 			print "nonexistent: error \'$rules->{not_exp_name}\' not expected to be there\n";
 			$error++;
 			sleep(1);
 		}
 	}
 
-	if ((-e "$PWD/$udev_root$rules->{exp_name}") ||
-	    (-l "$PWD/$udev_root$rules->{exp_name}")) {
+	if ((-e "$PWD/$udev_root/$rules->{exp_name}") ||
+	    (-l "$PWD/$udev_root/$rules->{exp_name}")) {
 
 		my ($dev, $ino, $mode, $nlink, $uid, $gid, $rdev, $size,
-		    $atime, $mtime, $ctime, $blksize, $blocks) = stat("$PWD/$udev_root$rules->{exp_name}");
+		    $atime, $mtime, $ctime, $blksize, $blocks) = stat("$PWD/$udev_root/$rules->{exp_name}");
 
 		if (defined($rules->{exp_perms})) {
 			permissions_test($rules, $uid, $gid, $mode);
@@ -1682,9 +1453,6 @@ sub run_test {
 		if (defined($rules->{exp_majorminor})) {
 			major_minor_test($rules, $rdev);
 		}
-		if (defined($rules->{exp_target})) {
-			symlink_test($rules);
-		}
 		print "add:         ok\n";
 	} else {
 		print "add:         error";
@@ -1704,9 +1472,9 @@ sub run_test {
 		return;
 	}
 
-	udev("remove", $rules->{subsys}, $rules->{devpath}, \$rules->{rules});
-	if ((-e "$PWD/$udev_root$rules->{exp_name}") ||
-	    (-l "$PWD/$udev_root$rules->{exp_name}")) {
+	udev("remove", $rules->{devpath}, \$rules->{rules});
+	if ((-e "$PWD/$udev_root/$rules->{exp_name}") ||
+	    (-l "$PWD/$udev_root/$rules->{exp_name}")) {
 		print "remove:      error";
 		if ($rules->{exp_rem_error}) {
 			print " as expected\n";
@@ -1743,6 +1511,7 @@ make_udev_root();
 open CONF, ">$udev_conf" || die "unable to create config file: $udev_conf";
 print CONF "udev_root=\"$udev_root\"\n";
 print CONF "udev_run=\"$udev_root/.udev\"\n";
+print CONF "udev_sys=\"$sysfs\"\n";
 print CONF "udev_rules=\"$PWD\"\n";
 print CONF "udev_log=\"err\"\n";
 close CONF;
diff --git a/udev/test-udev.c b/udev/test-udev.c
index 80394599..8d5baf7f 100644
--- a/udev/test-udev.c
+++ b/udev/test-udev.c
@@ -43,7 +43,6 @@ int main(int argc, char *argv[])
 	char syspath[UTIL_PATH_SIZE];
 	const char *devpath;
 	const char *action;
-	const char *subsystem;
 	sigset_t mask, sigmask_orig;
 	int err = -EINVAL;
 
@@ -55,12 +54,15 @@ int main(int argc, char *argv[])
 
 	sigprocmask(SIG_SETMASK, NULL, &sigmask_orig);
 
-	action = getenv("ACTION");
-	devpath = getenv("DEVPATH");
-	subsystem = getenv("SUBSYSTEM");
+	action = argv[1];
+	if (action == NULL) {
+		err(udev, "action missing\n");
+		goto out;
+	}
 
-	if (action == NULL || subsystem == NULL || devpath == NULL) {
-		err(udev, "action, subsystem or devpath missing\n");
+	devpath = argv[2];
+	if (devpath == NULL) {
+		err(udev, "devpath missing\n");
 		goto out;
 	}
 
@@ -73,10 +75,6 @@ int main(int argc, char *argv[])
 		goto out;
 	}
 
-	/* skip reading of db, but read kernel parameters */
-	udev_device_set_info_loaded(dev);
-	udev_device_read_uevent_file(dev);
-
 	udev_device_set_action(dev, action);
 	event = udev_event_new(dev);
 
@@ -88,6 +86,24 @@ int main(int argc, char *argv[])
 		goto out;
 	}
 
+	/* do what devtmpfs usually provides us */
+	if (udev_device_get_devnode(dev) != NULL) {
+		mode_t mode;
+
+		if (strcmp(udev_device_get_subsystem(dev), "block") == 0)
+			mode |= S_IFBLK;
+		else
+			mode |= S_IFCHR;
+
+		if (strcmp(action, "remove") != 0) {
+			util_create_path(udev, udev_device_get_devnode(dev));
+			mknod(udev_device_get_devnode(dev), mode, udev_device_get_devnum(dev));
+		} else {
+			unlink(udev_device_get_devnode(dev));
+			util_delete_path(udev, udev_device_get_devnode(dev));
+		}
+	}
+
 	err = udev_event_execute_rules(event, rules, &sigmask_orig);
 	if (err == 0)
 		udev_event_execute_run(event, NULL);
diff --git a/udev/udev-event.c b/udev/udev-event.c
index e10d48e1..3801f23a 100644
--- a/udev/udev-event.c
+++ b/udev/udev-event.c
@@ -59,7 +59,6 @@ void udev_event_unref(struct udev_event *event)
 	if (event == NULL)
 		return;
 	udev_list_cleanup(&event->run_list);
-	free(event->tmp_node);
 	free(event->program_result);
 	free(event->name);
 	dbg(event->udev, "free event %p\n", event);
@@ -71,7 +70,7 @@ size_t udev_event_apply_format(struct udev_event *event, const char *src, char *
 	struct udev_device *dev = event->dev;
 	enum subst_type {
 		SUBST_UNKNOWN,
-		SUBST_TEMP_NODE,
+		SUBST_DEVNODE,
 		SUBST_ATTR,
 		SUBST_ENV,
 		SUBST_KERNEL,
@@ -93,7 +92,8 @@ size_t udev_event_apply_format(struct udev_event *event, const char *src, char *
 		char fmt;
 		enum subst_type type;
 	} map[] = {
-		{ .name = "tempnode",	.fmt = 'N',	.type = SUBST_TEMP_NODE },
+		{ .name = "devnode",	.fmt = 'N',	.type = SUBST_DEVNODE },
+		{ .name = "tempnode",	.fmt = 'N',	.type = SUBST_DEVNODE },
 		{ .name = "attr",	.fmt = 's',	.type = SUBST_ATTR },
 		{ .name = "sysfs",	.fmt = 's',	.type = SUBST_ATTR },
 		{ .name = "env",	.fmt = 'E',	.type = SUBST_ENV },
@@ -332,7 +332,7 @@ subst:
 			dev_parent = udev_device_get_parent(event->dev);
 			if (dev_parent == NULL)
 				break;
-				devnode = udev_device_get_devnode(dev_parent);
+			devnode = udev_device_get_devnode(dev_parent);
 			if (devnode != NULL) {
 				size_t devlen = strlen(udev_get_dev_path(event->udev))+1;
 
@@ -342,56 +342,10 @@ subst:
 			}
 			break;
 		}
-		case SUBST_TEMP_NODE: {
-			dev_t devnum;
-			struct stat statbuf;
-			char filename[UTIL_PATH_SIZE];
-			const char *devtype;
-
-			if (event->tmp_node != NULL) {
-				l = util_strpcpy(&s, l, event->tmp_node);
-				dbg(event->udev, "tempnode: return earlier created one\n");
-				break;
-			}
-			devnum = udev_device_get_devnum(dev);
-			if (major(devnum) == 0)
-				break;
-			/* lookup kernel provided node */
-			if (udev_device_get_knodename(dev) != NULL) {
-				util_strscpyl(filename, sizeof(filename),
-					      udev_get_dev_path(event->udev), "/", udev_device_get_knodename(dev), NULL);
-				if (stat(filename, &statbuf) == 0 && statbuf.st_rdev == devnum) {
-					l = util_strpcpy(&s, l, filename);
-					dbg(event->udev, "tempnode: return kernel node\n");
-					break;
-				}
-			}
-			/* lookup /dev/{char,block}/<maj>:<min> */
-			if (strcmp(udev_device_get_subsystem(dev), "block") == 0)
-				devtype = "block";
-			else
-				devtype = "char";
-			snprintf(filename, sizeof(filename), "%s/%s/%u:%u",
-				 udev_get_dev_path(event->udev), devtype,
-				 major(udev_device_get_devnum(dev)),
-				 minor(udev_device_get_devnum(dev)));
-			if (stat(filename, &statbuf) == 0 && statbuf.st_rdev == devnum) {
-				l = util_strpcpy(&s, l, filename);
-				dbg(event->udev, "tempnode: return maj:min node\n");
-				break;
-			}
-			/* create temporary node */
-			dbg(event->udev, "tempnode: create temp node\n");
-			asprintf(&event->tmp_node, "%s/.tmp-%s-%u:%u",
-				 udev_get_dev_path(event->udev), devtype,
-				 major(udev_device_get_devnum(dev)),
-				 minor(udev_device_get_devnum(dev)));
-			if (event->tmp_node == NULL)
-				break;
-			udev_node_mknod(dev, event->tmp_node, 0600, 0, 0);
-			l = util_strpcpy(&s, l, event->tmp_node);
+		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) {
 				l = util_strpcpy(&s, l, event->name);
@@ -975,44 +929,6 @@ int udev_event_execute_rules(struct udev_event *event, struct udev_rules *rules,
 		}
 
 		if (major(udev_device_get_devnum(dev)) != 0) {
-			char filename[UTIL_PATH_SIZE];
-
-			if (event->tmp_node != NULL) {
-				info(event->udev, "cleanup temporary device node\n");
-				util_unlink_secure(event->udev, event->tmp_node);
-				free(event->tmp_node);
-				event->tmp_node = NULL;
-			}
-
-			/* no rule, use kernel provided name */
-			if (event->name == NULL) {
-				if (udev_device_get_knodename(dev) != NULL) {
-					event->name = strdup(udev_device_get_knodename(dev));
-					info(event->udev, "no node name set, will use kernel supplied name '%s'\n", event->name);
-				} else {
-					event->name = strdup(udev_device_get_sysname(event->dev));
-					info(event->udev, "no node name set, will use device name '%s'\n", event->name);
-				}
-			}
-
-			if (event->name == NULL || event->name[0] == '\0') {
-				udev_device_delete_db(dev);
-				udev_device_tag_index(dev, NULL, false);
-				udev_device_unref(event->dev_db);
-				err = -ENOMEM;
-				err(event->udev, "no node name, something went wrong, ignoring\n");
-				goto out;
-			}
-
-			if (udev_device_get_knodename(dev) != NULL && strcmp(udev_device_get_knodename(dev), event->name) != 0)
-				err(event->udev, "kernel-provided name '%s' and NAME= '%s' disagree, "
-				    "please use SYMLINK+= or change the kernel to provide the proper name\n",
-				    udev_device_get_knodename(dev), event->name);
-
-			/* set device node name */
-			util_strscpyl(filename, sizeof(filename), udev_get_dev_path(event->udev), "/", event->name, NULL);
-			udev_device_set_devnode(dev, filename);
-
 			/* remove/update possible left-over symlinks from old database entry */
 			if (event->dev_db != NULL)
 				udev_node_update_old_links(dev, event->dev_db);
@@ -1030,10 +946,6 @@ int udev_event_execute_rules(struct udev_event *event, struct udev_rules *rules,
 				}
 			}
 
-			/* set sticky bit, so we do not remove the node on module unload */
-			if (event->static_node)
-				event->mode |= 01000;
-
 			err = udev_node_add(dev, event->mode, event->uid, event->gid);
 		}
 
diff --git a/udev/udev-node.c b/udev/udev-node.c
index 44d3686d..31046bd7 100644
--- a/udev/udev-node.c
+++ b/udev/udev-node.c
@@ -33,90 +33,6 @@
 
 #define TMP_FILE_EXT		".udev-tmp"
 
-int udev_node_mknod(struct udev_device *dev, const char *file, mode_t mode, uid_t uid, gid_t gid)
-{
-	struct udev *udev = udev_device_get_udev(dev);
-	dev_t devnum = udev_device_get_devnum(dev);
-	struct stat stats;
-	int err = 0;
-
-
-	if (strcmp(udev_device_get_subsystem(dev), "block") == 0)
-		mode |= S_IFBLK;
-	else
-		mode |= S_IFCHR;
-
-	if (file == NULL)
-		file = udev_device_get_devnode(dev);
-
-	if (lstat(file, &stats) == 0) {
-		if (((stats.st_mode & S_IFMT) == (mode & S_IFMT)) && (stats.st_rdev == devnum)) {
-			info(udev, "preserve file '%s', because it has correct dev_t\n", file);
-			if ((stats.st_mode & 0777) != (mode & 0777) || stats.st_uid != uid || stats.st_gid != gid) {
-				/* preserve 'sticky' bit, if already set */
-				mode |= stats.st_mode & 01000;
-				info(udev, "set permissions %s, %#o, uid=%u, gid=%u\n", file, mode, uid, gid);
-				chmod(file, mode);
-				chown(file, uid, gid);
-			} else {
-				info(udev, "preserve permissions %s, %#o, uid=%u, gid=%u\n", file, mode, uid, gid);
-			}
-			/*
-			 * Set initial selinux file context only on add events.
-			 * We set the proper context on bootup (triger) or for newly
-			 * added devices, but we don't change it later, in case
-			 * something else has set a custom context in the meantime.
-			 */
-			if (strcmp(udev_device_get_action(dev), "add") == 0)
-				udev_selinux_lsetfilecon(udev, file, mode);
-			/* always update timestamp when we re-use the node, like on media change events */
-			utimensat(AT_FDCWD, file, NULL, 0);
-		} else {
-			char file_tmp[UTIL_PATH_SIZE + sizeof(TMP_FILE_EXT)];
-
-			info(udev, "atomically replace existing file '%s'\n", file);
-			util_strscpyl(file_tmp, sizeof(file_tmp), file, TMP_FILE_EXT, NULL);
-			unlink(file_tmp);
-			udev_selinux_setfscreatecon(udev, file_tmp, mode);
-			err = mknod(file_tmp, mode, devnum);
-			udev_selinux_resetfscreatecon(udev);
-			if (err != 0) {
-				err(udev, "mknod '%s' %u:%u %#o failed: %m\n",
-				    file_tmp, major(devnum), minor(devnum), mode);
-				goto exit;
-			}
-			err = rename(file_tmp, file);
-			if (err != 0) {
-				err(udev, "rename '%s' '%s' failed: %m\n", file_tmp, file);
-				unlink(file_tmp);
-				goto exit;
-			}
-			info(udev, "set permissions '%s' %#o uid=%u gid=%u\n", file, mode, uid, gid);
-			chmod(file, mode);
-			chown(file, uid, gid);
-		}
-	} else {
-		info(udev, "mknod '%s' %u:%u %#o\n", file, major(devnum), minor(devnum), mode);
-		do {
-			err = util_create_path_selinux(udev, file);
-			if (err != 0 && err != -ENOENT)
-				break;
-			udev_selinux_setfscreatecon(udev, file, mode);
-			err = mknod(file, mode, devnum);
-			if (err != 0)
-				err = -errno;
-			udev_selinux_resetfscreatecon(udev);
-		} while (err == -ENOENT);
-		if (err != 0 && err != -EEXIST)
-			err(udev, "mknod '%s' %u:%u %#o' failed: %m\n", file, major(devnum), minor(devnum), mode);
-		info(udev, "set permissions '%s' %#o uid=%u gid=%u\n", file, mode, uid, gid);
-		chmod(file, mode);
-		chown(file, uid, gid);
-	}
-exit:
-	return err;
-}
-
 static int node_symlink(struct udev *udev, const char *node, const char *slink)
 {
 	struct stat stats;
@@ -362,6 +278,55 @@ void udev_node_update_old_links(struct udev_device *dev, struct udev_device *dev
 	}
 }
 
+static int node_fixup(struct udev_device *dev, mode_t mode, uid_t uid, gid_t gid)
+{
+	struct udev *udev = udev_device_get_udev(dev);
+	const char *devnode = udev_device_get_devnode(dev);
+	dev_t devnum = udev_device_get_devnum(dev);
+	struct stat stats;
+	int err = 0;
+
+	if (strcmp(udev_device_get_subsystem(dev), "block") == 0)
+		mode |= S_IFBLK;
+	else
+		mode |= S_IFCHR;
+
+	if (lstat(devnode, &stats) != 0) {
+		err = -errno;
+		info(udev, "can not stat() node '%s' (%m)\n", devnode);
+		goto out;
+	}
+
+	if (((stats.st_mode & S_IFMT) != (mode & S_IFMT)) || (stats.st_rdev != devnum)) {
+		err = -EEXIST;
+		info(udev, "found node '%s' with non-matching devnum %s, skip handling\n",
+		     udev_device_get_devnode(dev), udev_device_get_id_filename(dev));
+		goto out;
+	}
+
+	if ((stats.st_mode & 0777) != (mode & 0777) || stats.st_uid != uid || stats.st_gid != gid) {
+		info(udev, "set permissions %s, %#o, uid=%u, gid=%u\n", devnode, mode, uid, gid);
+		chmod(devnode, mode);
+		chown(devnode, uid, gid);
+	} else {
+		info(udev, "preserve permissions %s, %#o, uid=%u, gid=%u\n", devnode, mode, uid, gid);
+	}
+
+	/*
+	 * Set initial selinux file context only on add events.
+	 * We set the proper context on bootup (triger) or for newly
+	 * added devices, but we don't change it later, in case
+	 * something else has set a custom context in the meantime.
+	 */
+	if (strcmp(udev_device_get_action(dev), "add") == 0)
+		udev_selinux_lsetfilecon(udev, devnode, mode);
+
+	/* always update timestamp when we re-use the node, like on media change events */
+	utimensat(AT_FDCWD, devnode, NULL, 0);
+out:
+	return err;
+}
+
 int udev_node_add(struct udev_device *dev, mode_t mode, uid_t uid, gid_t gid)
 {
 	struct udev *udev = udev_device_get_udev(dev);
@@ -369,15 +334,12 @@ int udev_node_add(struct udev_device *dev, mode_t mode, uid_t uid, gid_t gid)
 	struct udev_list_entry *list_entry;
 	int err = 0;
 
-	info(udev, "creating device node '%s', devnum=%d:%d, mode=%#o, uid=%d, gid=%d\n",
-	     udev_device_get_devnode(dev),
-	     major(udev_device_get_devnum(dev)), minor(udev_device_get_devnum(dev)),
-	     mode, uid, gid);
+	info(udev, "handling device node '%s', devnum=%s, mode=%#o, uid=%d, gid=%d\n",
+	     udev_device_get_devnode(dev), udev_device_get_id_filename(dev), mode, uid, gid);
 
-	if (udev_node_mknod(dev, NULL, mode, uid, gid) != 0) {
-		err = -1;
+	err = node_fixup(dev, mode, uid, gid);
+	if (err < 0)
 		goto exit;
-	}
 
 	/* always add /dev/{block,char}/$major:$minor */
 	snprintf(filename, sizeof(filename), "%s/%s/%u:%u",
@@ -412,38 +374,6 @@ int udev_node_remove(struct udev_device *dev)
 	udev_list_entry_foreach(list_entry, udev_device_get_devlinks_list_entry(dev))
 		link_update(dev, udev_list_entry_get_name(list_entry), 0);
 
-	devnode = udev_device_get_devnode(dev);
-	if (devnode == NULL)
-		goto out;
-
-	if (stat(devnode, &stats) == 0) {
-		if (stats.st_rdev != udev_device_get_devnum(dev)) {
-			info(udev, "device node '%s' points to a different device, skip removal\n", devnode);
-			err = -1;
-			goto out;
-		}
-
-		if (stats.st_mode & 01000) {
-			info(udev, "device node '%s' has sticky bit set, skip removal\n", devnode);
-			goto out;
-		}
-	} else {
-		info(udev, "device node '%s' not found\n", devnode);
-	}
-
-	dev_check = udev_device_new_from_syspath(udev, udev_device_get_syspath(dev));
-	if (dev_check != NULL) {
-		/* do not remove device node if the same sys-device is re-created in the meantime */
-		info(udev, "keeping device node of existing device'%s'\n", devnode);
-		udev_device_unref(dev_check);
-		goto out;
-	}
-
-	info(udev, "removing device node '%s'\n", devnode);
-	err = util_unlink_secure(udev, devnode);
-	if (err == 0)
-		util_delete_path(udev, devnode);
-
 	/* remove /dev/{block,char}/$major:$minor */
 	snprintf(filename, sizeof(filename), "%s/%s/%u:%u",
 		 udev_get_dev_path(udev),
diff --git a/udev/udev-rules.c b/udev/udev-rules.c
index 411b9d88..7e795451 100644
--- a/udev/udev-rules.c
+++ b/udev/udev-rules.c
@@ -2504,9 +2504,6 @@ int udev_rules_apply_to_event(struct udev_rules *rules, struct udev_event *event
 			     &rules->buf[rule->rule.filename_off],
 			     rule->rule.filename_line);
 			break;
-		case TK_A_STATIC_NODE:
-			event->static_node = true;
-			break;
 		case TK_A_ENV: {
 			const char *name = &rules->buf[cur->key.attr_off];
 			char *value = &rules->buf[cur->key.value_off];
@@ -2729,8 +2726,6 @@ void udev_rules_apply_static_dev_perms(struct udev_rules *rules)
 				else
 					mode = 0600;
 			}
-			/* set sticky bit, so we do not remove the node on module unload */
-			mode |= 01000;
 			if (mode != (stats.st_mode & 01777)) {
 				chmod(filename, mode);
 				info(rules->udev, "chmod '%s' %#o\n", filename, mode);
diff --git a/udev/udev.h b/udev/udev.h
index 4f2886c6..56b1652c 100644
--- a/udev/udev.h
+++ b/udev/udev.h
@@ -32,7 +32,6 @@ struct udev_event {
 	struct udev_device *dev_parent;
 	struct udev_device *dev_db;
 	char *name;
-	char *tmp_node;
 	char *program_result;
 	mode_t mode;
 	uid_t uid;
@@ -51,7 +50,6 @@ struct udev_event {
 	bool owner_final;
 	bool mode_set;
 	bool mode_final;
-	bool static_node;
 	bool name_final;
 	bool devlink_final;
 	bool run_final;
@@ -91,7 +89,6 @@ void udev_watch_end(struct udev *udev, struct udev_device *dev);
 struct udev_device *udev_watch_lookup(struct udev *udev, int wd);
 
 /* udev-node.c */
-int udev_node_mknod(struct udev_device *dev, const char *file, mode_t mode, uid_t uid, gid_t gid);
 int udev_node_add(struct udev_device *dev, mode_t mode, uid_t uid, gid_t gid);
 int udev_node_remove(struct udev_device *dev);
 void udev_node_update_old_links(struct udev_device *dev, struct udev_device *dev_old);
diff --git a/udev/udev.xml b/udev/udev.xml
index 7b31173b..fca0dad7 100644
--- a/udev/udev.xml
+++ b/udev/udev.xml
@@ -167,9 +167,8 @@
         <varlistentry>
           <term><option>NAME</option></term>
           <listitem>
-            <para>Match the name of the node or network interface. It can
-            be used once the NAME key has been set in one of the preceding
-            rules.</para>
+            <para>Match the name of a network interface. It can be used once the
+            NAME key has been set in one of the preceding rules.</para>
           </listitem>
         </varlistentry>
 
@@ -319,17 +318,8 @@
         <varlistentry>
           <term><option>NAME</option></term>
           <listitem>
-            <para>What a network interface should be named.</para>
-            <para>Also, as a temporary workaround, this is what a device node
-            should be named; usually the kernel provides the defined node name or creates
-            and removes the node before udev even receives any event. Changing
-            the node name from the kernel's default creates inconsistencies
-            and is not supported. If the kernel and NAME specify different names,
-            an error is logged. udev is only expected to handle device node
-            permissions and to create additional symlinks, not to change
-            kernel-provided device node names. Instead of renaming a device node,
-            SYMLINK should be used. However, symlink names must never conflict with
-            device node names, as that would result in unpredictable behavior.</para>
+            <para>The name to use for a network interface. The name of a device node
+            can not be changed by udev, only additional symlinks can be created.</para>
           </listitem>
         </varlistentry>
 
@@ -637,7 +627,7 @@
         <varlistentry>
           <term><option>$name</option></term>
           <listitem>
-            <para>The current name of the device node. If not changed by a rule, it is the
+            <para>The current name of the device. If not changed by a rule, it is the
             name of the kernel device.</para>
           </listitem>
         </varlistentry>
@@ -665,10 +655,9 @@
         </varlistentry>
 
         <varlistentry>
-          <term><option>$tempnode</option>, <option>%N</option></term>
+          <term><option>$devnode</option>, <option>%N</option></term>
           <listitem>
-            <para>The name of a temporary device node created to provide access to
-            the device from a external program before the real node is created.</para>
+            <para>The name of the device node.</para>
           </listitem>
         </varlistentry>
 
diff --git a/udev/udevd.c b/udev/udevd.c
index 63b4fd7a..6b561977 100644
--- a/udev/udevd.c
+++ b/udev/udevd.c
@@ -863,11 +863,10 @@ static void static_dev_create_from_modules(struct udev *udev)
 		if (sscanf(devno, "%c%u:%u", &type, &maj, &min) != 3)
 			continue;
 
-		/* set sticky bit, so we do not remove the node on module unload */
 		if (type == 'c')
-			mode = 01600|S_IFCHR;
+			mode = S_IFCHR;
 		else if (type == 'b')
-			mode = 01600|S_IFBLK;
+			mode = S_IFBLK;
 		else
 			continue;