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
  10 //usage:#define rfkill_trivial_usage
  11 //usage:       "COMMAND [INDEX|TYPE]"
  12 //usage:#define rfkill_full_usage "\n\n"
  13 //usage:       "Enable/disable wireless devices\n"
  14 //usage:       "\nCommands:"
  15 //usage:     "\n        list [INDEX|TYPE]       List current state"
  16 //usage:     "\n        block INDEX|TYPE        Disable device"
  17 //usage:     "\n        unblock INDEX|TYPE      Enable device"
  18 //usage:     "\n"
  19 //usage:     "\n        TYPE: all, wlan(wifi), bluetooth, uwb(ultrawideband),"
  20 //usage:     "\n                wimax, wwan, gps, fm"
  21
  22 #include "libbb.h"
  23 #include <linux/rfkill.h>
  24
  25 enum {
  26         OPT_b = (1 << 0), /* must be = 1 */
  27         OPT_u = (1 << 1),
  28         OPT_l = (1 << 2),
  29 };
  30
  31 int rfkill_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  32 int rfkill_main(int argc UNUSED_PARAM, char **argv)
  33 {
  34         struct rfkill_event event;
  35         const char *rf_name;
  36         int rf_fd;
  37         int mode;
  38         int rf_type;
  39         int rf_idx;
  40         unsigned rf_opt = 0;
  41
  42         argv++;
  43         /* Must have one or two params */
  44         if (!argv[0] || (argv[1] && argv[2]))
  45                 bb_show_usage();
  46
  47         mode = O_RDWR | O_NONBLOCK;
  48         rf_name = argv[1];
  49         if (strcmp(argv[0], "list") == 0) {
  50                 rf_opt |= OPT_l;
  51                 mode = O_RDONLY | O_NONBLOCK;
  52         } else if (strcmp(argv[0], "block") == 0 && rf_name) {
  53                 rf_opt |= OPT_b;
  54         } else if (strcmp(argv[0], "unblock") == 0 && rf_name) {
  55                 rf_opt |= OPT_u;
  56         } else
  57                 bb_show_usage();
  58
  59         rf_type = RFKILL_TYPE_ALL;
  60         rf_idx = -1;
  61         if (rf_name) {
  62                 static const char rfkill_types[] ALIGN1 = "all\0wlan\0bluetooth\0uwb\0wimax\0wwan\0gps\0fm\0";
  63                 if (strcmp(rf_name, "wifi") == 0)
  64                         rf_name = "wlan";
  65                 if (strcmp(rf_name, "ultrawideband") == 0)
  66                         rf_name = "uwb";
  67                 rf_type = index_in_strings(rfkill_types, rf_name);
  68                 if (rf_type < 0) {
  69                         rf_idx = xatoi_positive(rf_name);
  70                 }
  71         }
  72
  73         rf_fd = device_open("/dev/rfkill", mode);
  74         if (rf_fd < 0)
  75                 bb_perror_msg_and_die("/dev/rfkill");
  76
  77         if (rf_opt & OPT_l) {
  78                 while (full_read(rf_fd, &event, sizeof(event)) == RFKILL_EVENT_SIZE_V1) {
  79                         parser_t *parser;
  80                         char *tokens[2];
  81                         char rf_sysfs[sizeof("/sys/class/rfkill/rfkill%u/uevent") + sizeof(int)*3];
  82                         char *name, *type;
  83
  84                         if (rf_type && rf_type != event.type && rf_idx < 0) {
  85                                 continue;
  86                         }
  87
  88                         if (rf_idx >= 0 && event.idx != rf_idx) {
  89                                 continue;
  90                         }
  91
  92                         name = NULL;
  93                         type = NULL;
  94                         sprintf(rf_sysfs, "/sys/class/rfkill/rfkill%u/uevent", event.idx);
  95                         parser = config_open2(rf_sysfs, fopen_for_read);
  96                         while (config_read(parser, tokens, 2, 2, "\n=", PARSE_NORMAL)) {
  97                                 if (strcmp(tokens[0], "RFKILL_NAME") == 0) {
  98                                         name = xstrdup(tokens[1]);
  99                                         continue;
 100                                 }
 101                                 if (strcmp(tokens[0], "RFKILL_TYPE") == 0) {
 102                                         type = xstrdup(tokens[1]);
 103                                         continue;
 104                                 }
 105                         }
 106                         config_close(parser);
 107
 108                         printf("%u: %s: %s\n", event.idx, name, type);
 109                         printf("\tSoft blocked: %s\n", event.soft ? "yes" : "no");
 110                         printf("\tHard blocked: %s\n", event.hard ? "yes" : "no");
 111                         free(name);
 112                         free(type);
 113                 }
 114         } else {
 115                 memset(&event, 0, sizeof(event));
 116                 if (rf_type >= 0) {
 117                         event.type = rf_type;
 118                         event.op = RFKILL_OP_CHANGE_ALL;
 119                 }
 120
 121                 if (rf_idx >= 0) {
 122                         event.idx = rf_idx;
 123                         event.op = RFKILL_OP_CHANGE;
 124                 }
 125
 126                 /* Note: OPT_b == 1 */
 127                 event.soft = (rf_opt & OPT_b);
 128
 129                 xwrite(rf_fd, &event, sizeof(event));
 130         }
 131
 132         return EXIT_SUCCESS;
 133 }