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backlight: minor modernizations (#8528)

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Use strjoina() and STR_IN_SET()
This commit is contained in:
Lennart Poettering 2018-03-23 15:20:34 +01:00 committed by Zbigniew Jędrzejewski-Szmek
parent 4ddc526ce8
commit 3e44d24d3b
1 changed files with 7 additions and 16 deletions
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23
src/backlight/backlight.c
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@ -234,9 +234,9 @@ static unsigned get_max_brightness(struct udev_device *device) {
* an unreadably dim screen, which would otherwise force the user to
* disable state restoration. */
static void clamp_brightness(struct udev_device *device, char **value, unsigned max_brightness) {
int r;
unsigned brightness, new_brightness, min_brightness;
const char *subsystem;
int r;
r = safe_atou(*value, &brightness);
if (r < 0) {
@ -272,8 +272,8 @@ static void clamp_brightness(struct udev_device *device, char **value, unsigned
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, *escaped_ss = NULL, *escaped_sysname = NULL, *escaped_path_id = NULL;
const char *sysname, *path_id;
_cleanup_free_ char *escaped_ss = NULL, *escaped_sysname = NULL, *escaped_path_id = NULL;
const char *sysname, *path_id, *ss, *saved;
unsigned max_brightness;
int r;
@ -306,15 +306,11 @@ int main(int argc, char *argv[]) {
return EXIT_FAILURE;
}
ss = strndup(argv[2], sysname - argv[2]);
if (!ss) {
log_oom();
return EXIT_FAILURE;
}
ss = strndupa(argv[2], sysname - argv[2]);
sysname++;
if (!streq(ss, "backlight") && !streq(ss, "leds")) {
if (!STR_IN_SET(ss, "backlight", "leds")) {
log_error("Not a backlight or LED device: '%s:%s'", ss, sysname);
return EXIT_FAILURE;
}
@ -358,14 +354,9 @@ int main(int argc, char *argv[]) {
return EXIT_FAILURE;
}
saved = strjoin("/var/lib/systemd/backlight/", escaped_path_id, ":", escaped_ss, ":", escaped_sysname);
saved = strjoina("/var/lib/systemd/backlight/", escaped_path_id, ":", escaped_ss, ":", escaped_sysname);
} else
saved = strjoin("/var/lib/systemd/backlight/", escaped_ss, ":", escaped_sysname);
if (!saved) {
log_oom();
return EXIT_FAILURE;
}
saved = strjoina("/var/lib/systemd/backlight/", escaped_ss, ":", escaped_sysname);
/* If there are multiple conflicting backlight devices, then
* their probing at boot-time might happen in any order. This