From: Kay Sievers <kay.sievers@vrfy.org>
Date: Tue, 16 Sep 2008 00:12:47 +0000 (-0700)
Subject: libudev: switch API from devpath to syspath
X-Git-Tag: 174~1546
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=commitdiff_plain;h=8753fadf2a6ecead372e71b8bf9336cf29f9c958

libudev: switch API from devpath to syspath
---

diff --git a/TODO b/TODO
index 18f75b5f3..74f6936c4 100644
--- a/TODO
+++ b/TODO
@@ -11,5 +11,5 @@ These things will change in future udev versions:
   o symlink names to udevadm will no longer be resolved to old command names
 
 before next release:
-  o switch libudev API to syspath instead of devpath
+  o replace list.h with gpl or later version
   o udev_* prefix for private methods (ctrl_*)?
diff --git a/udev/lib/exported_symbols b/udev/lib/exported_symbols
index aa3854d2a..ab12ff57f 100644
--- a/udev/lib/exported_symbols
+++ b/udev/lib/exported_symbols
@@ -7,7 +7,7 @@ udev_get_log_priority
 udev_set_log_priority
 udev_get_sys_path
 udev_get_dev_path
-udev_device_new_from_devpath
+udev_device_new_from_syspath
 udev_device_get_parent
 udev_device_ref
 udev_device_unref
diff --git a/udev/lib/libudev-device.c b/udev/lib/libudev-device.c
index 918398b79..782d66254 100644
--- a/udev/lib/libudev-device.c
+++ b/udev/lib/libudev-device.c
@@ -56,14 +56,14 @@ struct udev_device {
 	struct list_head attr_list;
 };
 
-static size_t devpath_to_db_path(struct udev *udev, const char *devpath, char *filename, size_t len)
+static size_t syspath_to_db_path(struct udev_device *udev_device, char *filename, size_t len)
 {
 	size_t start;
 
 	/* translate to location of db file */
-	util_strlcpy(filename, udev_get_dev_path(udev), len);
+	util_strlcpy(filename, udev_get_dev_path(udev_device->udev), len);
 	start = util_strlcat(filename, "/.udev/db/", len);
-	util_strlcat(filename, devpath, len);
+	util_strlcat(filename, udev_device->devpath, len);
 	return util_path_encode(&filename[start], len - start);
 }
 
@@ -75,7 +75,7 @@ static int device_read_db(struct udev_device *udev_device)
 	FILE *f;
 	int rc = 0;
 
-	devpath_to_db_path(udev_device->udev, udev_device->devpath, filename, sizeof(filename));
+	syspath_to_db_path(udev_device, filename, sizeof(filename));
 
 	if (lstat(filename, &stats) != 0) {
 		info(udev_device->udev, "no db file to read %s: %s\n", filename, strerror(errno));
@@ -172,20 +172,20 @@ struct udev_device *device_init(struct udev *udev)
 }
 
 /**
- * udev_device_new_from_devpath:
+ * udev_device_new_from_syspath:
  * @udev: udev library context
- * @devpath: sys device path
+ * @syspath: sys device path including sys directory
  *
- * Create new udev device, and fill in information from the sysfs
- * device and the udev database entry. The devpath must not contain
- * the sysfs mount path, and must contain a leading '/'.
+ * Create new udev device, and fill in information from the sys
+ * device and the udev database entry. The sypath is the absolute
+ * path to the device, including the sys mount point.
  *
  * The initial refcount is 1, and needs to be decremented to
  * release the ressources of the udev device.
  *
  * Returns: a new udev device, or #NULL, if it does not exist
  **/
-struct udev_device *udev_device_new_from_devpath(struct udev *udev, const char *devpath)
+struct udev_device *udev_device_new_from_syspath(struct udev *udev, const char *syspath)
 {
 	char path[UTIL_PATH_SIZE];
 	struct stat statbuf;
@@ -193,14 +193,13 @@ struct udev_device *udev_device_new_from_devpath(struct udev *udev, const char *
 
 	if (udev == NULL)
 		return NULL;
-	if (devpath == NULL)
+	if (syspath == NULL)
 		return NULL;
 
-	util_strlcpy(path, udev_get_sys_path(udev), sizeof(path));
-	util_strlcat(path, devpath, sizeof(path));
+	util_strlcpy(path, syspath, sizeof(path));
 	util_strlcat(path, "/uevent", sizeof(path));
 	if (stat(path, &statbuf) != 0) {
-		info(udev, "not a device :%s\n", devpath);
+		info(udev, "not a device :%s\n", syspath);
 		return NULL;
 	}
 
@@ -209,9 +208,9 @@ struct udev_device *udev_device_new_from_devpath(struct udev *udev, const char *
 		return NULL;
 
 	/* resolve possible symlink to real path */
-	util_strlcpy(path, devpath, sizeof(path));
+	util_strlcpy(path, syspath, sizeof(path));
 	util_resolve_sys_link(udev, path, sizeof(path));
-	device_set_devpath(udev_device, path);
+	device_set_syspath(udev_device, path);
 	info(udev, "device %p has devpath '%s'\n", udev_device, udev_device_get_devpath(udev_device));
 
 	if (device_read_db(udev_device) >= 0)
@@ -228,23 +227,23 @@ static struct udev_device *device_new_from_parent(struct udev_device *udev_devic
 	if (udev_device == NULL)
 		return NULL;
 
-	util_strlcpy(path, udev_device_get_devpath(udev_device), sizeof(path));
+	util_strlcpy(path, udev_device->syspath, sizeof(path));
 	while (1) {
 		pos = strrchr(path, '/');
 		if (pos == path || pos == NULL)
 			break;
 		pos[0] = '\0';
-		udev_device_parent = udev_device_new_from_devpath(udev_device->udev, path);
+		udev_device_parent = udev_device_new_from_syspath(udev_device->udev, path);
 		if (udev_device_parent != NULL)
 			return udev_device_parent;
 	}
 
-	/* follow "device" link in deprecated sysfs /sys/class/ layout */
+	/* follow "device" link in deprecated sys /sys/class/ layout */
 	if (strncmp(udev_device->devpath, "/class/", 7) == 0) {
-		util_strlcpy(path, udev_device->devpath, sizeof(path));
+		util_strlcpy(path, udev_device->syspath, sizeof(path));
 		util_strlcat(path, "/device", sizeof(path));
 		if (util_resolve_sys_link(udev_device->udev, path, sizeof(path)) == 0) {
-			udev_device_parent = udev_device_new_from_devpath(udev_device->udev, path);
+			udev_device_parent = udev_device_new_from_syspath(udev_device->udev, path);
 			if (udev_device_parent != NULL)
 				return udev_device_parent;
 		}
@@ -398,7 +397,7 @@ const char *udev_device_get_subsystem(struct udev_device *udev_device)
 		return udev_device->subsystem;
 
 	/* read "subsytem" link */
-	if (util_get_sys_subsystem(udev_device->udev, udev_device->devpath, subsystem, sizeof(subsystem)) == 0) {
+	if (util_get_sys_subsystem(udev_device->udev, udev_device->syspath, subsystem, sizeof(subsystem)) == 0) {
 		udev_device->subsystem = strdup(subsystem);
 		return udev_device->subsystem;
 	}
@@ -490,7 +489,7 @@ const char *udev_device_get_driver(struct udev_device *udev_device)
 		return NULL;
 	if (udev_device->driver != NULL)
 		return udev_device->driver;
-	if (util_get_sys_driver(udev_device->udev, udev_device->devpath, driver, sizeof(driver)) < 2)
+	if (util_get_sys_driver(udev_device->udev, udev_device->syspath, driver, sizeof(driver)) < 2)
 		return NULL;
 	udev_device->driver = strdup(driver);
 	return udev_device->driver;
@@ -592,14 +591,18 @@ const char *udev_device_get_attr_value(struct udev_device *udev_device, const ch
 out:
 	return val;
 }
-int device_set_devpath(struct udev_device *udev_device, const char *devpath)
+int device_set_syspath(struct udev_device *udev_device, const char *syspath)
 {
-	if (asprintf(&udev_device->syspath, "%s%s", udev_get_sys_path(udev_device->udev), devpath) < 0)
+	const char *pos;
+
+	udev_device->syspath = strdup(syspath);
+	if (udev_device->syspath ==  NULL)
 		return -ENOMEM;
 	udev_device->devpath = &udev_device->syspath[strlen(udev_get_sys_path(udev_device->udev))];
-	udev_device->sysname = strrchr(udev_device->syspath, '/');
-	if (udev_device->sysname != NULL)
-		udev_device->sysname = &udev_device->sysname[1];
+	pos = strrchr(udev_device->syspath, '/');
+	if (pos == NULL)
+		return -EINVAL;
+	udev_device->sysname = &pos[1];
 	return 0;
 }
 
diff --git a/udev/lib/libudev-enumerate.c b/udev/lib/libudev-enumerate.c
index 95a407652..458be5861 100644
--- a/udev/lib/libudev-enumerate.c
+++ b/udev/lib/libudev-enumerate.c
@@ -38,9 +38,8 @@ static int devices_scan_subsystem(struct udev *udev,
 	char path[UTIL_PATH_SIZE];
 	DIR *dir;
 	struct dirent *dent;
-	size_t len;
 
-	len = util_strlcpy(path, udev_get_sys_path(udev), sizeof(path));
+	util_strlcpy(path, udev_get_sys_path(udev), sizeof(path));
 	util_strlcat(path, basedir, sizeof(path));
 	util_strlcat(path, "/", sizeof(path));
 	util_strlcat(path, subsystem, sizeof(path));
@@ -50,15 +49,15 @@ static int devices_scan_subsystem(struct udev *udev,
 	if (dir == NULL)
 		return -1;
 	for (dent = readdir(dir); dent != NULL; dent = readdir(dir)) {
-		char devpath[UTIL_PATH_SIZE];
+		char syspath[UTIL_PATH_SIZE];
 
 		if (dent->d_name[0] == '.')
 			continue;
-		util_strlcpy(devpath, &path[len], sizeof(devpath));
-		util_strlcat(devpath, "/", sizeof(devpath));
-		util_strlcat(devpath, dent->d_name, sizeof(devpath));
-		util_resolve_sys_link(udev, devpath, sizeof(devpath));
-		util_name_list_add(udev, device_list, devpath, NULL, 1);
+		util_strlcpy(syspath, path, sizeof(syspath));
+		util_strlcat(syspath, "/", sizeof(syspath));
+		util_strlcat(syspath, dent->d_name, sizeof(syspath));
+		util_resolve_sys_link(udev, syspath, sizeof(syspath));
+		util_name_list_add(udev, device_list, syspath, NULL, 1);
 	}
 	closedir(dir);
 	return 0;
@@ -89,27 +88,30 @@ static int devices_scan_subsystems(struct udev *udev,
 	return 0;
 }
 
-static int devices_delay(struct udev *udev, const char *devpath)
+static int devices_delay(struct udev *udev, const char *syspath)
 {
 	static const char *delay_device_list[] = {
 		"/block/md",
 		"/block/dm-",
 		NULL
 	};
+	size_t len;
 	int i;
 
+	len = strlen(udev_get_sys_path(udev));
+
 	for (i = 0; delay_device_list[i] != NULL; i++) {
-		if (strstr(devpath, delay_device_list[i]) != NULL) {
-			info(udev, "delaying: %s\n", devpath);
+		if (strstr(&syspath[len], delay_device_list[i]) != NULL) {
+			info(udev, "delaying: %s\n", syspath);
 			return 1;
 		}
 	}
 	return 0;
 }
 
-static int devices_call(struct udev *udev, const char *devpath,
+static int devices_call(struct udev *udev, const char *syspath,
 			int (*cb)(struct udev *udev,
-				  const char *devpath, const char *subsystem, const char *name,
+				  const char *syspath, const char *subsystem, const char *name,
 				  void *data),
 			void *data,
 			int *cb_rc)
@@ -117,14 +119,14 @@ static int devices_call(struct udev *udev, const char *devpath,
 	char subsystem[UTIL_PATH_SIZE];
 	const char *name;
 
-	name = strrchr(devpath, '/');
+	name = strrchr(syspath, '/');
 	if (name == NULL)
 		return -1;
 	name++;
 
-	if (util_get_sys_subsystem(udev, devpath, subsystem, sizeof(subsystem)) < 2)
+	if (util_get_sys_subsystem(udev, syspath, subsystem, sizeof(subsystem)) < 2)
 		return -1;
-	*cb_rc = cb(udev, devpath, subsystem, name, data);
+	*cb_rc = cb(udev, syspath, subsystem, name, data);
 	return 0;
 }
 
@@ -143,7 +145,7 @@ static int devices_call(struct udev *udev, const char *devpath,
  **/
 int udev_enumerate_devices(struct udev *udev, const char *subsystem,
 			   int (*cb)(struct udev *udev,
-				     const char *devpath, const char *subsystem, const char *name, void *data),
+				     const char *syspath, const char *subsystem, const char *name, void *data),
 			   void *data)
 {
 	char base[UTIL_PATH_SIZE];
diff --git a/udev/lib/libudev-monitor.c b/udev/lib/libudev-monitor.c
index 8e9cf2d0e..f61ddb0b5 100644
--- a/udev/lib/libudev-monitor.c
+++ b/udev/lib/libudev-monitor.c
@@ -302,7 +302,11 @@ struct udev_device *udev_monitor_receive_device(struct udev_monitor *udev_monito
 		bufpos += keylen + 1;
 
 		if (strncmp(key, "DEVPATH=", 8) == 0) {
-			device_set_devpath(udev_device, &key[8]);
+			char path[UTIL_PATH_SIZE];
+
+			util_strlcpy(path, udev_get_sys_path(udev_monitor->udev), sizeof(path));
+			util_strlcat(path, &key[8], sizeof(path));
+			device_set_syspath(udev_device, path);
 		} else if (strncmp(key, "SUBSYSTEM=", 10) == 0) {
 			device_set_subsystem(udev_device, &key[10]);
 		} else if (strncmp(key, "DEVNAME=", 8) == 0) {
@@ -336,6 +340,8 @@ struct udev_device *udev_monitor_receive_device(struct udev_monitor *udev_monito
 		} else if (strncmp(key, "TIMEOUT=", 8) == 0) {
 			device_set_timeout(udev_device, strtoull(&key[8], NULL, 10));
 		}
+		if (strncmp(key, "PHYSDEV", 7) == 0)
+			continue;
 		device_add_property_from_string(udev_device, key);
 	}
 	device_set_devnum(udev_device, makedev(maj, min));
diff --git a/udev/lib/libudev-private.h b/udev/lib/libudev-private.h
index f28bd9acf..1756be5f2 100644
--- a/udev/lib/libudev-private.h
+++ b/udev/lib/libudev-private.h
@@ -55,7 +55,7 @@ extern const char *udev_get_rules_path(struct udev *udev);
 extern int udev_get_run(struct udev *udev);
 
 /* libudev-device */
-extern int device_set_devpath(struct udev_device *udev_device, const char *devpath);
+extern int device_set_syspath(struct udev_device *udev_device, const char *syspath);
 extern int device_set_subsystem(struct udev_device *udev_device, const char *subsystem);
 extern int device_set_devname(struct udev_device *udev_device, const char *devname);
 extern int device_add_devlink(struct udev_device *udev_device, const char *devlink);
@@ -114,9 +114,9 @@ struct util_name_entry {
 	char *value;
 	int *i;
 };
-extern ssize_t util_get_sys_subsystem(struct udev *udev, const char *devpath, char *subsystem, size_t size);
-extern ssize_t util_get_sys_driver(struct udev *udev, const char *devpath, char *driver, size_t size);
-extern int util_resolve_sys_link(struct udev *udev, char *devpath, size_t size);
+extern ssize_t util_get_sys_subsystem(struct udev *udev, const char *syspath, char *subsystem, size_t size);
+extern ssize_t util_get_sys_driver(struct udev *udev, const char *syspath, char *driver, size_t size);
+extern int util_resolve_sys_link(struct udev *udev, char *syspath, size_t size);
 extern struct util_name_entry *util_name_list_add(struct udev *udev, struct list_head *name_list,
 						  const char *name, const char *value, int sort);
 extern void util_name_list_cleanup(struct udev *udev, struct list_head *name_list);
@@ -127,5 +127,4 @@ extern void util_remove_trailing_chars(char *path, char c);
 extern size_t util_strlcpy(char *dst, const char *src, size_t size);
 extern size_t util_strlcat(char *dst, const char *src, size_t size);
 extern int util_replace_chars(char *str, const char *white);
-extern char *util_sysattr_get_value(struct udev *udev, const char *devpath, const char *attr_name);
 #endif
diff --git a/udev/lib/libudev-util.c b/udev/lib/libudev-util.c
index 50eacdd37..7053a2f82 100644
--- a/udev/lib/libudev-util.c
+++ b/udev/lib/libudev-util.c
@@ -33,14 +33,13 @@
 #include "libudev.h"
 #include "libudev-private.h"
 
-static ssize_t get_sys_link(struct udev *udev, const char *slink, const char *devpath, char *subsystem, size_t size)
+static ssize_t get_sys_link(struct udev *udev, const char *slink, const char *syspath, char *subsystem, size_t size)
 {
 	char path[UTIL_PATH_SIZE];
 	ssize_t len;
 	const char *pos;
 
-	util_strlcpy(path, udev_get_sys_path(udev), sizeof(path));
-	util_strlcat(path, devpath, sizeof(path));
+	util_strlcpy(path, syspath, sizeof(path));
 	util_strlcat(path, "/", sizeof(path));
 	util_strlcat(path, slink, sizeof(path));
 	len = readlink(path, path, sizeof(path));
@@ -54,46 +53,43 @@ static ssize_t get_sys_link(struct udev *udev, const char *slink, const char *de
 	return util_strlcpy(subsystem, pos, size);
 }
 
-ssize_t util_get_sys_subsystem(struct udev *udev, const char *devpath, char *subsystem, size_t size)
+ssize_t util_get_sys_subsystem(struct udev *udev, const char *syspath, char *subsystem, size_t size)
 {
-	return get_sys_link(udev, "subsystem", devpath, subsystem, size);
+	return get_sys_link(udev, "subsystem", syspath, subsystem, size);
 }
 
-ssize_t util_get_sys_driver(struct udev *udev, const char *devpath, char *driver, size_t size)
+ssize_t util_get_sys_driver(struct udev *udev, const char *syspath, char *driver, size_t size)
 {
-	return get_sys_link(udev, "driver", devpath, driver, size);
+	return get_sys_link(udev, "driver", syspath, driver, size);
 }
 
-int util_resolve_sys_link(struct udev *udev, char *devpath, size_t size)
+int util_resolve_sys_link(struct udev *udev, char *syspath, size_t size)
 {
-	char link_path[UTIL_PATH_SIZE];
 	char link_target[UTIL_PATH_SIZE];
 
 	int len;
 	int i;
 	int back;
 
-	util_strlcpy(link_path, udev_get_sys_path(udev), sizeof(link_path));
-	util_strlcat(link_path, devpath, sizeof(link_path));
-	len = readlink(link_path, link_target, sizeof(link_target));
+	len = readlink(syspath, link_target, sizeof(link_target));
 	if (len <= 0)
 		return -1;
 	link_target[len] = '\0';
-	dbg(udev, "path link '%s' points to '%s'\n", devpath, link_target);
+	dbg(udev, "path link '%s' points to '%s'\n", syspath, link_target);
 
 	for (back = 0; strncmp(&link_target[back * 3], "../", 3) == 0; back++)
 		;
-	dbg(udev, "base '%s', tail '%s', back %i\n", devpath, &link_target[back * 3], back);
+	dbg(udev, "base '%s', tail '%s', back %i\n", syspath, &link_target[back * 3], back);
 	for (i = 0; i <= back; i++) {
-		char *pos = strrchr(devpath, '/');
+		char *pos = strrchr(syspath, '/');
 
 		if (pos == NULL)
 			return -1;
 		pos[0] = '\0';
 	}
-	dbg(udev, "after moving back '%s'\n", devpath);
-	util_strlcat(devpath, "/", size);
-	util_strlcat(devpath, &link_target[back * 3], size);
+	dbg(udev, "after moving back '%s'\n", syspath);
+	util_strlcat(syspath, "/", size);
+	util_strlcat(syspath, &link_target[back * 3], size);
 	return 0;
 }
 
diff --git a/udev/lib/libudev.h b/udev/lib/libudev.h
index 05f23e170..6996b47fa 100644
--- a/udev/lib/libudev.h
+++ b/udev/lib/libudev.h
@@ -45,7 +45,7 @@ extern void udev_selinux_setfscreatecon(struct udev *udev, const char *file, uns
 extern void udev_selinux_lsetfilecon(struct udev *udev, const char *file, unsigned int mode);
 
 struct udev_device;
-extern struct udev_device *udev_device_new_from_devpath(struct udev *udev, const char *devpath);
+extern struct udev_device *udev_device_new_from_syspath(struct udev *udev, const char *syspath);
 extern struct udev_device *udev_device_get_parent(struct udev_device *udev_device);
 extern struct udev_device *udev_device_ref(struct udev_device *udev_device);
 extern void udev_device_unref(struct udev_device *udev_device);
@@ -71,7 +71,7 @@ extern const char *udev_device_get_attr_value(struct udev_device *udev_device, c
 
 extern int udev_enumerate_devices(struct udev *udev, const char *subsystem,
 				  int (*cb)(struct udev *udev,
-					    const char *devpath, const char *subsystem, const char *name, void *data),
+					    const char *syspath, const char *subsystem, const char *name, void *data),
 				  void *data);
 
 struct udev_monitor;
diff --git a/udev/lib/test-libudev.c b/udev/lib/test-libudev.c
index b30117627..4dcc80a14 100644
--- a/udev/lib/test-libudev.c
+++ b/udev/lib/test-libudev.c
@@ -56,14 +56,14 @@ static void print_device(struct udev_device *device)
 	int count;
 
 	printf("*** device: %p ***\n", device);
+	str = udev_device_get_syspath(device);
+	printf("syspath:   '%s'\n", str);
 	str = udev_device_get_devpath(device);
 	printf("devpath:   '%s'\n", str);
 	str = udev_device_get_subsystem(device);
 	printf("subsystem: '%s'\n", str);
 	str = udev_device_get_driver(device);
 	printf("driver:    '%s'\n", str);
-	str = udev_device_get_syspath(device);
-	printf("syspath:   '%s'\n", str);
 	str = udev_device_get_devname(device);
 	printf("devname:   '%s'\n", str);
 	count = udev_device_get_devlinks(device, print_devlinks_cb, NULL);
@@ -73,12 +73,12 @@ static void print_device(struct udev_device *device)
 	printf("\n");
 }
 
-static int test_device(struct udev *udev, const char *devpath)
+static int test_device(struct udev *udev, const char *syspath)
 {
 	struct udev_device *device;
 
-	printf("looking at device: %s\n", devpath);
-	device = udev_device_new_from_devpath(udev, devpath);
+	printf("looking at device: %s\n", syspath);
+	device = udev_device_new_from_syspath(udev, syspath);
 	if (device == NULL) {
 		printf("no device\n");
 		return -1;
@@ -88,13 +88,13 @@ static int test_device(struct udev *udev, const char *devpath)
 	return 0;
 }
 
-static int test_device_parents(struct udev *udev, const char *devpath)
+static int test_device_parents(struct udev *udev, const char *syspath)
 {
 	struct udev_device *device;
 	struct udev_device *device_parent;
 
-	printf("looking at device: %s\n", devpath);
-	device = udev_device_new_from_devpath(udev, devpath);
+	printf("looking at device: %s\n", syspath);
+	device = udev_device_new_from_syspath(udev, syspath);
 	if (device == NULL)
 		return -1;
 
@@ -185,7 +185,7 @@ int main(int argc, char *argv[], char *envp[])
 {
 	struct udev *udev = NULL;
 	static const struct option options[] = {
-		{ "devpath", 1, NULL, 'p' },
+		{ "syspath", 1, NULL, 'p' },
 		{ "subsystem", 1, NULL, 's' },
 		{ "socket", 1, NULL, 'S' },
 		{ "debug", 0, NULL, 'd' },
@@ -193,9 +193,10 @@ int main(int argc, char *argv[], char *envp[])
 		{ "version", 0, NULL, 'V' },
 		{}
 	};
-	const char *devpath = "/devices/virtual/mem/null";
+	const char *syspath = "/devices/virtual/mem/null";
 	const char *subsystem = NULL;
 	const char *socket = "@/org/kernel/udev/monitor";
+	char path[1024];
 	const char *str;
 
 	udev = udev_new();
@@ -216,7 +217,7 @@ int main(int argc, char *argv[], char *envp[])
 
 		switch (option) {
 		case 'p':
-			devpath = optarg;
+			syspath = optarg;
 			break;
 		case 's':
 			subsystem = optarg;
@@ -229,7 +230,7 @@ int main(int argc, char *argv[], char *envp[])
 				udev_set_log_priority(udev, LOG_INFO);
 			break;
 		case 'h':
-			printf("--debug --devpath= --subsystem= --socket= --help\n");
+			printf("--debug --syspath= --subsystem= --socket= --help\n");
 			goto out;
 		case 'V':
 			printf("%s\n", VERSION);
@@ -244,8 +245,14 @@ int main(int argc, char *argv[], char *envp[])
 	str = udev_get_dev_path(udev);
 	printf("dev_path: '%s'\n", str);
 
-	test_device(udev, devpath);
-	test_device_parents(udev, devpath);
+	/* add sys path if needed */
+	if (strncmp(syspath, udev_get_sys_path(udev), strlen(udev_get_sys_path(udev))) != 0) {
+		snprintf(path, sizeof(path), "%s%s", udev_get_sys_path(udev), syspath);
+		syspath = path;
+	}
+
+	test_device(udev, syspath);
+	test_device_parents(udev, syspath);
 	test_enumerate(udev, subsystem);
 	test_monitor(udev, socket);
 out:
diff --git a/udev/udevadm-info.c b/udev/udevadm-info.c
index a2858e5dc..9ce83aabd 100644
--- a/udev/udevadm-info.c
+++ b/udev/udevadm-info.c
@@ -166,12 +166,12 @@ static void print_record(struct udev_device *device)
 }
 
 static int export_all_cb(struct udev *udev,
-			 const char *devpath, const char *subsystem, const char *name,
+			 const char *syspath, const char *subsystem, const char *name,
 			 void *data)
 {
 	struct udev_device *device;
 
-	device = udev_device_new_from_devpath(udev, devpath);
+	device = udev_device_new_from_syspath(udev, syspath);
 	if (device == NULL)
 		return 0;
 	if (udev_device_get_devname(device) != NULL)
@@ -215,7 +215,9 @@ static struct udev_device *lookup_device_by_name(struct udev *udev, const char *
 			info(udev, "skip '%s', dev_t doesn't match\n", udevice_loop->name);
 			goto next;
 		}
-		udev_device = udev_device_new_from_devpath(udev, udevice_loop->dev->devpath);
+		util_strlcpy(filename, udev_get_sys_path(udev), sizeof(filename));
+		util_strlcat(filename,  udevice_loop->dev->devpath, sizeof(filename));
+		udev_device = udev_device_new_from_syspath(udev, filename);
 		udev_device_cleanup(udevice_loop);
 		break;
 next:
@@ -348,13 +350,15 @@ int udevadm_info(struct udev *udev, int argc, char *argv[])
 				rc = 2;
 				goto exit;
 			}
-			/* remove /sys if given */
-			if (strncmp(optarg, udev_get_sys_path(udev), strlen(udev_get_sys_path(udev))) == 0)
-				util_strlcpy(path, &optarg[strlen(udev_get_sys_path(udev))], sizeof(path));
-			else
+			/* add /sys if needed */
+			if (strncmp(optarg, udev_get_sys_path(udev), strlen(udev_get_sys_path(udev))) != 0) {
+				util_strlcpy(path, udev_get_sys_path(udev), sizeof(path));
+				util_strlcat(path, optarg, sizeof(path));
+			} else {
 				util_strlcpy(path, optarg, sizeof(path));
+			}
 			util_remove_trailing_chars(path, '/');
-			device = udev_device_new_from_devpath(udev, path);
+			device = udev_device_new_from_syspath(udev, path);
 			break;
 		case 'q':
 			action = ACTION_QUERY;