summaryrefslogtreecommitdiff
path: root/src/rfkill/rfkill.c
blob: b814e5c5fc5d287c44dcb36ff6d25fb042c48278 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
/*-*- 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"
#include "utils.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, *escaped_name = NULL, *escaped_path_id = NULL;
        const char *name, *path_id;
        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;
        }

        errno = 0;
        device = udev_device_new_from_subsystem_sysname(udev, "rfkill", argv[2]);
        if (!device) {
                if (errno != 0)
                        log_error("Failed to get rfkill device '%s': %m", argv[2]);
                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;
        }

        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/rfkill/", escaped_path_id, ":", escaped_name, NULL);
        } else
                saved = strjoin("/var/lib/systemd/rfkill/", escaped_name, NULL);

        if (!saved) {
                log_oom();
                return EXIT_FAILURE;
        }

        if (streq(argv[1], "load") && restore_state()) {
                _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;
}