r = safe_atou(max_brightness_str, &max_brightness);
if (r < 0) {
- log_warning("Failed to parse 'max_brightness' \"%s\": %s", max_brightness_str, strerror(-r));
+ log_warning_errno(r, "Failed to parse 'max_brightness' \"%s\": %m", max_brightness_str);
return 0;
}
r = safe_atou(*value, &brightness);
if (r < 0) {
- log_warning("Failed to parse brightness \"%s\": %s", *value, strerror(-r));
+ log_warning_errno(r, "Failed to parse brightness \"%s\": %m", *value);
return;
}
r = mkdir_p("/var/lib/systemd/backlight", 0755);
if (r < 0) {
- log_error("Failed to create backlight directory /var/lib/systemd/backlight: %s",
- strerror(-r));
+ log_error_errno(r, "Failed to create backlight directory /var/lib/systemd/backlight: %m");
return EXIT_FAILURE;
}
device = udev_device_new_from_subsystem_sysname(udev, ss, sysname);
if (!device) {
if (errno != 0)
- log_error("Failed to get backlight or LED device '%s:%s': %m", ss, sysname);
+ log_error_errno(errno, "Failed to get backlight or LED device '%s:%s': %m", ss, sysname);
else
log_oom();
* device probing should be complete), so that the validity
* check at boot time doesn't have to be reliable. */
- if (streq(argv[1], "load") && shall_restore_state()) {
+ if (streq(argv[1], "load")) {
_cleanup_free_ char *value = NULL;
+ const char *clamp;
+
+ if (!shall_restore_state())
+ return EXIT_SUCCESS;
if (!validate_device(udev, device))
return EXIT_SUCCESS;
if (r == -ENOENT)
return EXIT_SUCCESS;
- log_error("Failed to read %s: %s", saved, strerror(-r));
+ log_error_errno(r, "Failed to read %s: %m", saved);
return EXIT_FAILURE;
}
- clamp_brightness(device, &value, max_brightness);
+ clamp = udev_device_get_property_value(device, "ID_BACKLIGHT_CLAMP");
+ if (!clamp || parse_boolean(clamp) != 0) /* default to clamping */
+ clamp_brightness(device, &value, max_brightness);
r = udev_device_set_sysattr_value(device, "brightness", value);
if (r < 0) {
- log_error("Failed to write system 'brightness' attribute: %s",
- strerror(-r));
+ log_error_errno(r, "Failed to write system 'brightness' attribute: %m");
return EXIT_FAILURE;
}
r = write_string_file(saved, value);
if (r < 0) {
- log_error("Failed to write %s: %s", saved, strerror(-r));
+ log_error_errno(r, "Failed to write %s: %m", saved);
return EXIT_FAILURE;
}