From: Kay Sievers <kay.sievers@vrfy.org>
Date: Wed, 4 Nov 2009 16:06:52 +0000 (+0100)
Subject: udevd: create /dev/.udev/rules.d/ before watching it wit inotify
X-Git-Tag: 174~733
X-Git-Url: https://www.chiark.greenend.org.uk/ucgi/~ianmdlvl/git?p=elogind.git;a=commitdiff_plain;h=081be002eae9bc7fc03dbfd7b99b4d28a7c98f9d

udevd: create /dev/.udev/rules.d/ before watching it wit inotify

This should also address:

On Tue, Nov 3, 2009 at 16:21, Marco d'Itri <md@linux.it> wrote:
> udev_rules_new() in udev/udev-rules.c unconditionally creates the
> directory.
> This is a problem because the function is called also by e.g. udevadm
> test, and creating /dev/.udev/ when it does not exist is an unacceptable
> side effect which will break everything else that checks for its
> existence to know if udev is running.
---

diff --git a/udev/udev-rules.c b/udev/udev-rules.c
index 422e14ce2..092ddcdc2 100644
--- a/udev/udev-rules.c
+++ b/udev/udev-rules.c
@@ -1736,12 +1736,6 @@ struct udev_rules *udev_rules_new(struct udev *udev, int resolve_names)
 
 		/* read dynamic/temporary rules */
 		util_strscpyl(filename, sizeof(filename), udev_get_dev_path(udev), "/.udev/rules.d", NULL);
-		if (stat(filename, &statbuf) != 0) {
-			util_create_path(udev, filename);
-			udev_selinux_setfscreatecon(udev, filename, S_IFDIR|0755);
-			mkdir(filename, 0755);
-			udev_selinux_resetfscreatecon(udev);
-		}
 		udev_list_init(&sort_list);
 		add_matching_files(udev, &sort_list, filename, ".rules");
 
diff --git a/udev/udevd.c b/udev/udevd.c
index 88e117f50..72f9b180d 100644
--- a/udev/udevd.c
+++ b/udev/udevd.c
@@ -919,6 +919,7 @@ int main(int argc, char *argv[])
 				  IN_CREATE | IN_DELETE | IN_MOVE | IN_CLOSE_WRITE);
 	} else {
 		char filename[UTIL_PATH_SIZE];
+		struct stat statbuf;
 
 		inotify_add_watch(pfd[FD_INOTIFY].fd, LIBEXECDIR "/rules.d",
 				  IN_CREATE | IN_DELETE | IN_MOVE | IN_CLOSE_WRITE);
@@ -927,6 +928,12 @@ int main(int argc, char *argv[])
 
 		/* watch dynamic rules directory */
 		util_strscpyl(filename, sizeof(filename), udev_get_dev_path(udev), "/.udev/rules.d", NULL);
+		if (stat(filename, &statbuf) != 0) {
+			util_create_path(udev, filename);
+			udev_selinux_setfscreatecon(udev, filename, S_IFDIR|0755);
+			mkdir(filename, 0755);
+			udev_selinux_resetfscreatecon(udev);
+		}
 		inotify_add_watch(pfd[FD_INOTIFY].fd, filename,
 				  IN_CREATE | IN_DELETE | IN_MOVE | IN_CLOSE_WRITE);
 	}