miscutils/rfkill.c

   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 GPLv2 or later, see file LICENSE in this source tree.
   8  */
   9 //config:config RFKILL
  10 //config:       bool "rfkill (5.3 kb)"
  11 //config:       default n # doesn't build on Ubuntu 9.04
  12 //config:       select PLATFORM_LINUX
  13 //config:       help
  14 //config:       Enable/disable wireless devices.
  15 //config:
  16 //config:       rfkill list : list all wireless devices
  17 //config:       rfkill list bluetooth : list all bluetooth devices
  18 //config:       rfkill list 1 : list device corresponding to the given index
  19 //config:       rfkill block|unblock wlan : block/unblock all wlan(wifi) devices
  20 //config:
  21
  22 //applet:IF_RFKILL(APPLET(rfkill, BB_DIR_USR_SBIN, BB_SUID_DROP))
  23
  24 //kbuild:lib-$(CONFIG_RFKILL) += rfkill.o
  25
  26 //usage:#define rfkill_trivial_usage
  27 //usage:       "COMMAND [INDEX|TYPE]"
  28 //usage:#define rfkill_full_usage "\n\n"
  29 //usage:       "Enable/disable wireless devices\n"
  30 //usage:       "\nCommands:"
  31 //usage:     "\n        list [INDEX|TYPE]       List current state"
  32 //usage:     "\n        block INDEX|TYPE        Disable device"
  33 //usage:     "\n        unblock INDEX|TYPE      Enable device"
  34 //usage:     "\n"
  35 //usage:     "\n        TYPE: all, wlan(wifi), bluetooth, uwb(ultrawideband),"
  36 //usage:     "\n                wimax, wwan, gps, fm"
  37
  38 #include "libbb.h"
  39 #include <linux/rfkill.h>
  40
  41 enum {
  42         OPT_b = (1 << 0), /* must be = 1 */
  43         OPT_u = (1 << 1),
  44         OPT_l = (1 << 2),
  45 };
  46
  47 int rfkill_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  48 int rfkill_main(int argc UNUSED_PARAM, char **argv)
  49 {
  50         struct rfkill_event event;
  51         const char *rf_name;
  52         int rf_fd;
  53         int mode;
  54         int rf_type;
  55         int rf_idx;
  56         unsigned rf_opt = 0;
  57
  58         argv++;
  59         /* Must have one or two params */
  60         if (!argv[0] || (argv[1] && argv[2]))
  61                 bb_show_usage();
  62
  63         mode = O_RDWR | O_NONBLOCK;
  64         rf_name = argv[1];
  65         if (strcmp(argv[0], "list") == 0) {
  66                 rf_opt |= OPT_l;
  67                 mode = O_RDONLY | O_NONBLOCK;
  68         } else if (strcmp(argv[0], "block") == 0 && rf_name) {
  69                 rf_opt |= OPT_b;
  70         } else if (strcmp(argv[0], "unblock") == 0 && rf_name) {
  71                 rf_opt |= OPT_u;
  72         } else
  73                 bb_show_usage();
  74
  75         rf_type = RFKILL_TYPE_ALL;
  76         rf_idx = -1;
  77         if (rf_name) {
  78                 static const char rfkill_types[] ALIGN1 = "all\0wlan\0bluetooth\0uwb\0wimax\0wwan\0gps\0fm\0";
  79                 if (strcmp(rf_name, "wifi") == 0)
  80                         rf_name = "wlan";
  81                 if (strcmp(rf_name, "ultrawideband") == 0)
  82                         rf_name = "uwb";
  83                 rf_type = index_in_strings(rfkill_types, rf_name);
  84                 if (rf_type < 0) {
  85                         rf_idx = xatoi_positive(rf_name);
  86                 }
  87         }
  88
  89         rf_fd = device_open("/dev/rfkill", mode);
  90         if (rf_fd < 0)
  91                 bb_perror_msg_and_die("/dev/rfkill");
  92
  93         if (rf_opt & OPT_l) {
  94                 while (full_read(rf_fd, &event, sizeof(event)) == RFKILL_EVENT_SIZE_V1) {
  95                         parser_t *parser;
  96                         char *tokens[2];
  97                         char rf_sysfs[sizeof("/sys/class/rfkill/rfkill%u/uevent") + sizeof(int)*3];
  98                         char *name, *type;
  99
 100                         if (rf_type && rf_type != event.type && rf_idx < 0) {
 101                                 continue;
 102                         }
 103
 104                         if (rf_idx >= 0 && event.idx != rf_idx) {
 105                                 continue;
 106                         }
 107
 108                         name = NULL;
 109                         type = NULL;
 110                         sprintf(rf_sysfs, "/sys/class/rfkill/rfkill%u/uevent", event.idx);
 111                         parser = config_open2(rf_sysfs, fopen_for_read);
 112                         while (config_read(parser, tokens, 2, 2, "\n=", PARSE_NORMAL)) {
 113                                 if (strcmp(tokens[0], "RFKILL_NAME") == 0) {
 114                                         name = xstrdup(tokens[1]);
 115                                         continue;
 116                                 }
 117                                 if (strcmp(tokens[0], "RFKILL_TYPE") == 0) {
 118                                         type = xstrdup(tokens[1]);
 119                                         continue;
 120                                 }
 121                         }
 122                         config_close(parser);
 123
 124                         printf("%u: %s: %s\n", event.idx, name, type);
 125                         printf("\tSoft blocked: %s\n", event.soft ? "yes" : "no");
 126                         printf("\tHard blocked: %s\n", event.hard ? "yes" : "no");
 127                         free(name);
 128                         free(type);
 129                 }
 130         } else {
 131                 memset(&event, 0, sizeof(event));
 132                 if (rf_type >= 0) {
 133                         event.type = rf_type;
 134                         event.op = RFKILL_OP_CHANGE_ALL;
 135                 }
 136
 137                 if (rf_idx >= 0) {
 138                         event.idx = rf_idx;
 139                         event.op = RFKILL_OP_CHANGE;
 140                 }
 141
 142                 /* Note: OPT_b == 1 */
 143                 event.soft = (rf_opt & OPT_b);
 144
 145                 xwrite(rf_fd, &event, sizeof(event));
 146         }
 147
 148         return EXIT_SUCCESS;
 149 }