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authorLennart Poettering <lennart@poettering.net>2013-10-14 19:01:09 +0200
committerLennart Poettering <lennart@poettering.net>2013-10-14 19:02:44 +0200
commitbe3f52f4ed02a9256b1577719677b32a17b525ac (patch)
tree488cd3cc70190f3ca82034b6d2811a0106da0bfa /src/backlight
parentf6f738db7273f8a2092ac372852f37f2a34cea17 (diff)
backlight: include ID_PATH in file names for backlight settings
Much like for rfkill devices we should provide some stability regarding enumeration order, hence include the stable bits of the device path in the file name we store settings under.
Diffstat (limited to 'src/backlight')
-rw-r--r--src/backlight/backlight.c29
1 files changed, 26 insertions, 3 deletions
diff --git a/src/backlight/backlight.c b/src/backlight/backlight.c
index 51a67a042a..e8cdad61ed 100644
--- a/src/backlight/backlight.c
+++ b/src/backlight/backlight.c
@@ -195,8 +195,8 @@ static bool validate_device(struct udev *udev, struct udev_device *device) {
int main(int argc, char *argv[]) {
_cleanup_udev_unref_ struct udev *udev = NULL;
_cleanup_udev_device_unref_ struct udev_device *device = NULL;
- _cleanup_free_ char *saved = NULL, *ss = NULL;
- const char *sysname;
+ _cleanup_free_ char *saved = NULL, *ss = NULL, *escaped_ss = NULL, *escaped_sysname = NULL, *escaped_path_id = NULL;
+ const char *sysname, *path_id;
int r;
if (argc != 3) {
@@ -252,7 +252,30 @@ int main(int argc, char *argv[]) {
return EXIT_FAILURE;
}
- saved = strjoin("/var/lib/systemd/backlight/", ss, ":", sysname, NULL);
+ escaped_ss = cescape(ss);
+ if (!escaped_ss) {
+ log_oom();
+ return EXIT_FAILURE;
+ }
+
+ escaped_sysname = cescape(sysname);
+ if (!escaped_sysname) {
+ log_oom();
+ return EXIT_FAILURE;
+ }
+
+ path_id = udev_device_get_property_value(device, "ID_PATH");
+ if (path_id) {
+ escaped_path_id = cescape(path_id);
+ if (!escaped_path_id) {
+ log_oom();
+ return EXIT_FAILURE;
+ }
+
+ saved = strjoin("/var/lib/systemd/backlight/", escaped_path_id, ":", escaped_ss, ":", escaped_sysname, NULL);
+ } else
+ saved = strjoin("/var/lib/systemd/backlight/", escaped_ss, ":", escaped_sysname, NULL);
+
if (!saved) {
log_oom();
return EXIT_FAILURE;