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authorLennart Poettering <lennart@poettering.net>2013-10-14 04:31:49 +0200
committerLennart Poettering <lennart@poettering.net>2013-10-14 04:31:49 +0200
commit3990f247652c3bd41e4ea074e6302277eb9c7aa3 (patch)
treea374a06aa0c19ef135bf93f47cfc50c76b476c17 /src/rfkill/rfkill.c
parent0f4ba83c397e807939a4eb0b2cbd04ad4ab548cc (diff)
rfkill: add new rfkill tool to save/restore rfkill state across reboots
This works analogous to the existing backlight and random seed services
Diffstat (limited to 'src/rfkill/rfkill.c')
-rw-r--r--src/rfkill/rfkill.c146
1 files changed, 146 insertions, 0 deletions
diff --git a/src/rfkill/rfkill.c b/src/rfkill/rfkill.c
new file mode 100644
index 0000000000..91536523b0
--- /dev/null
+++ b/src/rfkill/rfkill.c
@@ -0,0 +1,146 @@
+/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
+
+/***
+ This file is part of systemd.
+
+ Copyright 2013 Lennart Poettering
+
+ systemd is free software; you can redistribute it and/or modify it
+ under the terms of the GNU Lesser General Public License as published by
+ the Free Software Foundation; either version 2.1 of the License, or
+ (at your option) any later version.
+
+ systemd is distributed in the hope that it will be useful, but
+ WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public License
+ along with systemd; If not, see <http://www.gnu.org/licenses/>.
+***/
+
+#include "util.h"
+#include "mkdir.h"
+#include "fileio.h"
+#include "libudev.h"
+#include "udev-util.h"
+
+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_name = NULL;
+ const char *sysname, *name;
+ int r;
+
+ if (argc != 3) {
+ log_error("This program requires two arguments.");
+ return EXIT_FAILURE;
+ }
+
+ log_set_target(LOG_TARGET_AUTO);
+ log_parse_environment();
+ log_open();
+
+ umask(0022);
+
+ r = mkdir_p("/var/lib/systemd/rfkill", 0755);
+ if (r < 0) {
+ log_error("Failed to create rfkill directory: %s", strerror(-r));
+ return EXIT_FAILURE;
+ }
+
+ udev = udev_new();
+ if (!udev) {
+ log_oom();
+ return EXIT_FAILURE;
+ }
+
+ sysname = strchr(argv[2], ':');
+ if (!sysname) {
+ log_error("Requires pair of subsystem and sysname for specifying rfkill device.");
+ return EXIT_FAILURE;
+ }
+
+ ss = strndup(argv[2], sysname - argv[2]);
+ if (!ss) {
+ log_oom();
+ return EXIT_FAILURE;
+ }
+
+ sysname++;
+
+ if (!streq(ss, "rfkill")) {
+ log_error("Not a rfkill device: '%s:%s'", ss, sysname);
+ return EXIT_FAILURE;
+ }
+
+ errno = 0;
+ device = udev_device_new_from_subsystem_sysname(udev, ss, sysname);
+ if (!device) {
+ if (errno != 0)
+ log_error("Failed to get rfkill device '%s:%s': %m", ss, sysname);
+ else
+ log_oom();
+
+ return EXIT_FAILURE;
+ }
+
+ name = udev_device_get_sysattr_value(device, "name");
+ if (!name) {
+ log_error("rfkill device has no name?");
+ return EXIT_FAILURE;
+ }
+
+ escaped_name = cescape(name);
+ if (!escaped_name) {
+ log_oom();
+ return EXIT_FAILURE;
+ }
+
+ saved = strjoin("/var/lib/systemd/rfkill/", escaped_name, NULL);
+ if (!saved) {
+ log_oom();
+ return EXIT_FAILURE;
+ }
+
+ if (streq(argv[1], "load")) {
+ _cleanup_free_ char *value = NULL;
+
+ r = read_one_line_file(saved, &value);
+ if (r < 0) {
+
+ if (r == -ENOENT)
+ return EXIT_SUCCESS;
+
+ log_error("Failed to read %s: %s", saved, strerror(-r));
+ return EXIT_FAILURE;
+ }
+
+ r = udev_device_set_sysattr_value(device, "soft", value);
+ if (r < 0) {
+ log_error("Failed to write system attribute: %s", strerror(-r));
+ return EXIT_FAILURE;
+ }
+
+ } else if (streq(argv[1], "save")) {
+ const char *value;
+
+ value = udev_device_get_sysattr_value(device, "soft");
+ if (!value) {
+ log_error("Failed to read system attribute: %s", strerror(-r));
+ return EXIT_FAILURE;
+ }
+
+ r = write_string_file(saved, value);
+ if (r < 0) {
+ log_error("Failed to write %s: %s", saved, strerror(-r));
+ return EXIT_FAILURE;
+ }
+
+ } else {
+ log_error("Unknown verb %s.", argv[1]);
+ return EXIT_FAILURE;
+ }
+
+ return EXIT_SUCCESS;
+}