1 | /* vi: set sw=4 ts=4: */
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2 | /*
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3 | * rfkill implementation for busybox
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4 | *
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5 | * Copyright (C) 2010 Malek Degachi <malek-degachi@laposte.net>
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6 | *
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7 | * Licensed under GPLv2 or later, see file LICENSE in this source tree.
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8 | */
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9 |
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10 | //config:config RFKILL
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11 | //config: bool "rfkill"
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12 | //config: default n # doesn't build on Ubuntu 9.04
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13 | //config: select PLATFORM_LINUX
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14 | //config: help
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15 | //config: Enable/disable wireless devices.
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16 | //config:
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17 | //config: rfkill list : list all wireless devices
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18 | //config: rfkill list bluetooth : list all bluetooth devices
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19 | //config: rfkill list 1 : list device corresponding to the given index
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20 | //config: rfkill block|unblock wlan : block/unblock all wlan(wifi) devices
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21 | //config:
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22 |
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23 | //applet:IF_RFKILL(APPLET(rfkill, BB_DIR_USR_SBIN, BB_SUID_DROP))
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24 |
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25 | //kbuild:lib-$(CONFIG_RFKILL) += rfkill.o
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26 |
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27 | //usage:#define rfkill_trivial_usage
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28 | //usage: "COMMAND [INDEX|TYPE]"
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29 | //usage:#define rfkill_full_usage "\n\n"
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30 | //usage: "Enable/disable wireless devices\n"
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31 | //usage: "\nCommands:"
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32 | //usage: "\n list [INDEX|TYPE] List current state"
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33 | //usage: "\n block INDEX|TYPE Disable device"
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34 | //usage: "\n unblock INDEX|TYPE Enable device"
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35 | //usage: "\n"
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36 | //usage: "\n TYPE: all, wlan(wifi), bluetooth, uwb(ultrawideband),"
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37 | //usage: "\n wimax, wwan, gps, fm"
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38 |
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39 | #include "libbb.h"
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40 | #include <linux/rfkill.h>
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41 |
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42 | enum {
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43 | OPT_b = (1 << 0), /* must be = 1 */
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44 | OPT_u = (1 << 1),
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45 | OPT_l = (1 << 2),
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46 | };
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47 |
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48 | int rfkill_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
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49 | int rfkill_main(int argc UNUSED_PARAM, char **argv)
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50 | {
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51 | struct rfkill_event event;
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52 | const char *rf_name;
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53 | int rf_fd;
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54 | int mode;
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55 | int rf_type;
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56 | int rf_idx;
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57 | unsigned rf_opt = 0;
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58 |
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59 | argv++;
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60 | /* Must have one or two params */
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61 | if (!argv[0] || (argv[1] && argv[2]))
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62 | bb_show_usage();
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63 |
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64 | mode = O_RDWR | O_NONBLOCK;
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65 | rf_name = argv[1];
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66 | if (strcmp(argv[0], "list") == 0) {
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67 | rf_opt |= OPT_l;
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68 | mode = O_RDONLY | O_NONBLOCK;
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69 | } else if (strcmp(argv[0], "block") == 0 && rf_name) {
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70 | rf_opt |= OPT_b;
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71 | } else if (strcmp(argv[0], "unblock") == 0 && rf_name) {
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72 | rf_opt |= OPT_u;
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73 | } else
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74 | bb_show_usage();
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75 |
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76 | rf_type = RFKILL_TYPE_ALL;
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77 | rf_idx = -1;
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78 | if (rf_name) {
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79 | static const char rfkill_types[] ALIGN1 = "all\0wlan\0bluetooth\0uwb\0wimax\0wwan\0gps\0fm\0";
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80 | if (strcmp(rf_name, "wifi") == 0)
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81 | rf_name = "wlan";
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82 | if (strcmp(rf_name, "ultrawideband") == 0)
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83 | rf_name = "uwb";
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84 | rf_type = index_in_strings(rfkill_types, rf_name);
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85 | if (rf_type < 0) {
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86 | rf_idx = xatoi_positive(rf_name);
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87 | }
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88 | }
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89 |
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90 | rf_fd = device_open("/dev/rfkill", mode);
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91 | if (rf_fd < 0)
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92 | bb_perror_msg_and_die("/dev/rfkill");
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93 |
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94 | if (rf_opt & OPT_l) {
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95 | while (full_read(rf_fd, &event, sizeof(event)) == RFKILL_EVENT_SIZE_V1) {
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96 | parser_t *parser;
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97 | char *tokens[2];
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98 | char rf_sysfs[sizeof("/sys/class/rfkill/rfkill%u/uevent") + sizeof(int)*3];
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99 | char *name, *type;
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100 |
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101 | if (rf_type && rf_type != event.type && rf_idx < 0) {
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102 | continue;
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103 | }
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104 |
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105 | if (rf_idx >= 0 && event.idx != rf_idx) {
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106 | continue;
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107 | }
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108 |
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109 | name = NULL;
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110 | type = NULL;
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111 | sprintf(rf_sysfs, "/sys/class/rfkill/rfkill%u/uevent", event.idx);
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112 | parser = config_open2(rf_sysfs, fopen_for_read);
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113 | while (config_read(parser, tokens, 2, 2, "\n=", PARSE_NORMAL)) {
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114 | if (strcmp(tokens[0], "RFKILL_NAME") == 0) {
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115 | name = xstrdup(tokens[1]);
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116 | continue;
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117 | }
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118 | if (strcmp(tokens[0], "RFKILL_TYPE") == 0) {
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119 | type = xstrdup(tokens[1]);
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120 | continue;
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121 | }
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122 | }
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123 | config_close(parser);
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124 |
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125 | printf("%u: %s: %s\n", event.idx, name, type);
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126 | printf("\tSoft blocked: %s\n", event.soft ? "yes" : "no");
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127 | printf("\tHard blocked: %s\n", event.hard ? "yes" : "no");
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128 | free(name);
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129 | free(type);
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130 | }
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131 | } else {
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132 | memset(&event, 0, sizeof(event));
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133 | if (rf_type >= 0) {
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134 | event.type = rf_type;
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135 | event.op = RFKILL_OP_CHANGE_ALL;
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136 | }
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137 |
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138 | if (rf_idx >= 0) {
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139 | event.idx = rf_idx;
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140 | event.op = RFKILL_OP_CHANGE;
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141 | }
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142 |
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143 | /* Note: OPT_b == 1 */
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144 | event.soft = (rf_opt & OPT_b);
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145 |
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146 | xwrite(rf_fd, &event, sizeof(event));
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147 | }
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148 |
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149 | return EXIT_SUCCESS;
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150 | }
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