4844262f25
Generate the file name from ID_PATH plus the rfkill type (wlan, bluetooth, ...) and ignore the rfkill device name, since it apparently is not a stable identifier. Also, ensure that devices disappearing don't result in broken services, simply exit cleanly.
143 lines
4.6 KiB
C
143 lines
4.6 KiB
C
/*-*- Mode: C; c-basic-offset: 8; indent-tabs-mode: nil -*-*/
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/***
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This file is part of systemd.
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Copyright 2013 Lennart Poettering
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systemd is free software; you can redistribute it and/or modify it
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under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2.1 of the License, or
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(at your option) any later version.
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systemd is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with systemd; If not, see <http://www.gnu.org/licenses/>.
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***/
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#include "util.h"
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#include "mkdir.h"
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#include "fileio.h"
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#include "libudev.h"
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#include "udev-util.h"
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int main(int argc, char *argv[]) {
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_cleanup_udev_unref_ struct udev *udev = NULL;
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_cleanup_udev_device_unref_ struct udev_device *device = NULL;
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_cleanup_free_ char *saved = NULL, *escaped_type = NULL, *escaped_path_id = NULL;
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const char *name, *type, *path_id;
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int r;
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if (argc != 3) {
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log_error("This program requires two arguments.");
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return EXIT_FAILURE;
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}
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log_set_target(LOG_TARGET_AUTO);
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log_parse_environment();
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log_open();
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umask(0022);
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r = mkdir_p("/var/lib/systemd/rfkill", 0755);
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if (r < 0) {
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log_error_errno(r, "Failed to create rfkill directory: %m");
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return EXIT_FAILURE;
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}
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udev = udev_new();
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if (!udev) {
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log_oom();
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return EXIT_FAILURE;
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}
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device = udev_device_new_from_subsystem_sysname(udev, "rfkill", argv[2]);
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if (!device) {
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log_debug_errno(errno, "Failed to get rfkill device '%s', ignoring: %m", argv[2]);
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return EXIT_SUCCESS;
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}
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name = udev_device_get_sysattr_value(device, "name");
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if (!name) {
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log_error("rfkill device has no name? Ignoring device.");
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return EXIT_SUCCESS;
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}
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log_debug("Operating on rfkill device '%s'.", name);
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type = udev_device_get_sysattr_value(device, "type");
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if (!type) {
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log_error("rfkill device has no type? Ignoring device.");
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return EXIT_SUCCESS;
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}
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escaped_type = cescape(type);
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if (!escaped_type) {
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log_oom();
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return EXIT_FAILURE;
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}
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path_id = udev_device_get_property_value(device, "ID_PATH");
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if (path_id) {
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escaped_path_id = cescape(path_id);
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if (!escaped_path_id) {
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log_oom();
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return EXIT_FAILURE;
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}
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saved = strjoin("/var/lib/systemd/rfkill/", escaped_path_id, ":", escaped_type, NULL);
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} else
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saved = strjoin("/var/lib/systemd/rfkill/", escaped_type, NULL);
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if (!saved) {
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log_oom();
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return EXIT_FAILURE;
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}
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if (streq(argv[1], "load")) {
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_cleanup_free_ char *value = NULL;
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if (!shall_restore_state())
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return EXIT_SUCCESS;
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r = read_one_line_file(saved, &value);
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if (r == -ENOENT)
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return EXIT_SUCCESS;
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if (r < 0) {
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log_error_errno(r, "Failed to read %s: %m", saved);
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return EXIT_FAILURE;
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}
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r = udev_device_set_sysattr_value(device, "soft", value);
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if (r < 0) {
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log_debug_errno(r, "Failed to write 'soft' attribute on rfkill device, ignoring: %m");
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return EXIT_SUCCESS;
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}
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} else if (streq(argv[1], "save")) {
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const char *value;
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value = udev_device_get_sysattr_value(device, "soft");
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if (!value) {
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log_debug_errno(r, "Failed to read system attribute, ignoring device: %m");
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return EXIT_SUCCESS;
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}
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r = write_string_file(saved, value);
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if (r < 0) {
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log_error_errno(r, "Failed to write %s: %m", saved);
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return EXIT_FAILURE;
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}
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} else {
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log_error("Unknown verb %s.", argv[1]);
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return EXIT_FAILURE;
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}
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return EXIT_SUCCESS;
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}
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