sd-device: add sd_device_get_devnode

2 files changed, 21 insertions, 0 deletions

diff --git a/src/libsystemd/sd-device/sd-device.c b/src/libsystemd/sd-device/sd-device.c
index dd63e277e..45e8461fb 100644
--- a/src/libsystemd/sd-device/sd-device.c
+++ b/src/libsystemd/sd-device/sd-device.c
@@ -995,6 +995,26 @@ _public_ int sd_device_get_devpath(sd_device *device, const char **devpath) {
         return 0;
 }
 
+_public_ int sd_device_get_devnode(sd_device *device, const char **devnode) {
+        int r;
+
+        assert_return(device, -EINVAL);
+        assert_return(devnode, -EINVAL);
+
+        r = device_read_uevent_file(device);
+        if (r < 0)
+                return r;
+
+        if (!device->devnode)
+                return -ENOENT;
+
+        assert(path_startswith(device->devnode, "/dev/"));
+
+        *devnode = device->devnode;
+
+        return 0;
+}
+
 static int device_get_id_filename(sd_device *device, const char **ret) {
         assert(device);
         assert(ret);
diff --git a/src/systemd/sd-device.h b/src/systemd/sd-device.h
index ca5ad0361..c94c89307 100644
--- a/src/systemd/sd-device.h
+++ b/src/systemd/sd-device.h
@@ -48,6 +48,7 @@ int sd_device_get_parent_with_subsystem_devtype(sd_device *child, const char *su
 int sd_device_get_devnum(sd_device *device, dev_t *devnum);
 int sd_device_get_driver(sd_device *device, const char **ret);
 int sd_device_get_devpath(sd_device *device, const char **ret);
+int sd_device_get_devnode(sd_device *device, const char **ret);
 
 int sd_device_get_is_initialized(sd_device *device, int *initialized);
 int sd_device_get_usec_since_initialized(sd_device *device, uint64_t *usec);