LXR busybox/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 (4.4 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
  41enum {
  42        OPT_b = (1 << 0), /* must be = 1 */
  43        OPT_u = (1 << 1),
  44        OPT_l = (1 << 2),
  45};
  46
  47int rfkill_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  48int 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}
 150