X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?a=blobdiff_plain;f=udev_sysfs.c;h=8de523dadf66abc3bbf0198c9dac01036ca7f608;hb=36af2ddcb92c51acad0f909bb5dfb090cea9c5ed;hp=983837980338e8de0a219b991063689188f08413;hpb=ea48d4d7fb856184b5caadf5436a48afe5ad113c;p=elogind.git

diff --git a/udev_sysfs.c b/udev_sysfs.c
index 983837980..8de523dad 100644
--- a/udev_sysfs.c
+++ b/udev_sysfs.c
@@ -26,6 +26,7 @@
 #include <fcntl.h>
 #include <ctype.h>
 #include <errno.h>
+#include <sys/stat.h>
 
 #include "udev.h"
 
@@ -274,7 +275,7 @@ struct sysfs_device *sysfs_device_get_parent(struct sysfs_device *dev)
 	if (strncmp(parent_devpath, "/class", 6) == 0) {
 		pos = strrchr(parent_devpath, '/');
 		if (pos == &parent_devpath[6] || pos == parent_devpath) {
-			dbg("class top level, look for device link");
+			dbg("/class top level, look for device link");
 			goto device_link;
 		}
 	}
@@ -306,6 +307,19 @@ device_link:
 	return sysfs_device_get(parent_devpath);
 }
 
+struct sysfs_device *sysfs_device_get_parent_with_subsystem(struct sysfs_device *dev, const char *subsystem)
+{
+	struct sysfs_device *dev_parent;
+
+	dev_parent = sysfs_device_get_parent(dev);
+	while (dev_parent != NULL) {
+		if (strcmp(dev_parent->subsystem, subsystem) == 0)
+			return dev_parent;
+		dev_parent = sysfs_device_get_parent(dev_parent);
+	}
+	return NULL;
+}
+
 char *sysfs_attr_get_value(const char *devpath, const char *attr_name)
 {
 	char path_full[PATH_SIZE];