1/* vi: set sw=4 ts=4: */
2/*
3* rfkill implementation for busybox
4*
5* Copyright (C) 2010  Malek Degachi <malek-degachi@laposte.net>
6*
7* Licensed under the GPL v2 or later, see the file LICENSE in this tarball.
8*/
9#include "libbb.h"
10#include <linux/rfkill.h>
11
12enum {
13	OPT_b = (1 << 0), /* must be = 1 */
14	OPT_u = (1 << 1),
15	OPT_l = (1 << 2),
16};
17
18int rfkill_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
19int rfkill_main(int argc UNUSED_PARAM, char **argv)
20{
21	struct rfkill_event event;
22	const char *rf_name;
23	int rf_fd;
24	int mode;
25	int rf_type;
26	int rf_idx;
27	unsigned rf_opt = 0;
28
29	argv++;
30	/* Must have one or two params */
31	if (!argv[0] || (argv[1] && argv[2]))
32		bb_show_usage();
33
34	mode = O_RDWR | O_NONBLOCK;
35	rf_name = argv[1];
36	if (strcmp(argv[0], "list") == 0) {
37		rf_opt |= OPT_l;
38		mode = O_RDONLY | O_NONBLOCK;
39	} else if (strcmp(argv[0], "block") == 0 && rf_name) {
40		rf_opt |= OPT_b;
41	} else if (strcmp(argv[0], "unblock") == 0 && rf_name) {
42		rf_opt |= OPT_u;
43	} else
44		bb_show_usage();
45
46	rf_type = RFKILL_TYPE_ALL;
47	rf_idx = -1;
48	if (rf_name) {
49		static const char rfkill_types[] ALIGN1 = "all\0wlan\0bluetooth\0uwb\0wimax\0wwan\0gps\0fm\0";
50		if (strcmp(rf_name, "wifi") == 0)
51			rf_name = "wlan";
52		if (strcmp(rf_name, "ultrawideband") == 0)
53			rf_name = "uwb";
54		rf_type = index_in_strings(rfkill_types, rf_name);
55		if (rf_type < 0) {
56			rf_idx = xatoi_u(rf_name);
57		}
58	}
59
60	rf_fd = device_open("/dev/rfkill", mode);
61	if (rf_fd < 0)
62		bb_perror_msg_and_die("/dev/rfkill");
63
64	if (rf_opt & OPT_l) {
65		while (full_read(rf_fd, &event, sizeof(event)) == RFKILL_EVENT_SIZE_V1) {
66			parser_t *parser;
67			char *tokens[2];
68			char rf_sysfs[sizeof("/sys/class/rfkill/rfkill%u/uevent") + sizeof(int)*3];
69			char *name, *type;
70
71			if (rf_type && rf_type != event.type && rf_idx < 0) {
72				continue;
73			}
74
75			if (rf_idx >= 0 && event.idx != rf_idx) {
76				continue;
77			}
78
79			name = NULL;
80			type = NULL;
81			sprintf(rf_sysfs, "/sys/class/rfkill/rfkill%u/uevent", event.idx);
82			parser = config_open2(rf_sysfs, fopen_for_read);
83			while (config_read(parser, tokens, 2, 2, "\n=", PARSE_NORMAL)) {
84				if (strcmp(tokens[0], "RFKILL_NAME") == 0) {
85					name = xstrdup(tokens[1]);
86					continue;
87				}
88				if (strcmp(tokens[0], "RFKILL_TYPE") == 0) {
89					type = xstrdup(tokens[1]);
90					continue;
91				}
92			}
93			config_close(parser);
94
95			printf("%u: %s: %s\n", event.idx, name, type);
96			printf("\tSoft blocked: %s\n", event.soft ? "yes" : "no");
97			printf("\tHard blocked: %s\n", event.hard ? "yes" : "no");
98			free(name);
99			free(type);
100		}
101	} else {
102		memset(&event, 0, sizeof(event));
103		if (rf_type >= 0) {
104			event.type = rf_type;
105			event.op = RFKILL_OP_CHANGE_ALL;
106		}
107
108		if (rf_idx >= 0) {
109			event.idx = rf_idx;
110			event.op = RFKILL_OP_CHANGE;
111		}
112
113		/* Note: OPT_b == 1 */
114		event.soft = (rf_opt & OPT_b);
115
116		xwrite(rf_fd, &event, sizeof(event));
117	}
118
119	return EXIT_SUCCESS;
120}
121