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
  10//config:config RFKILL
  11//config:       bool "rfkill"
  12//config:       default n # doesn't build on Ubuntu 9.04
  13//config:       select PLATFORM_LINUX
  14//config:       help
  15//config:         Enable/disable wireless devices.
  16//config:
  17//config:         rfkill list : list all wireless devices
  18//config:         rfkill list bluetooth : list all bluetooth devices
  19//config:         rfkill list 1 : list device corresponding to the given index
  20//config:         rfkill block|unblock wlan : block/unblock all wlan(wifi) devices
  21//config:
  22
  23//applet:IF_RFKILL(APPLET(rfkill, BB_DIR_USR_SBIN, BB_SUID_DROP))
  24
  25//kbuild:lib-$(CONFIG_RFKILL) += rfkill.o
  26
  27//usage:#define rfkill_trivial_usage
  28//usage:       "COMMAND [INDEX|TYPE]"
  29//usage:#define rfkill_full_usage "\n\n"
  30//usage:       "Enable/disable wireless devices\n"
  31//usage:       "\nCommands:"
  32//usage:     "\n        list [INDEX|TYPE]       List current state"
  33//usage:     "\n        block INDEX|TYPE        Disable device"
  34//usage:     "\n        unblock INDEX|TYPE      Enable device"
  35//usage:     "\n"
  36//usage:     "\n        TYPE: all, wlan(wifi), bluetooth, uwb(ultrawideband),"
  37//usage:     "\n                wimax, wwan, gps, fm"
  38
  39#include "libbb.h"
  40#include <linux/rfkill.h>
  41
  42enum {
  43        OPT_b = (1 << 0), /* must be = 1 */
  44        OPT_u = (1 << 1),
  45        OPT_l = (1 << 2),
  46};
  47
  48int rfkill_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
  49int rfkill_main(int argc UNUSED_PARAM, char **argv)
  50{
  51        struct rfkill_event event;
  52        const char *rf_name;
  53        int rf_fd;
  54        int mode;
  55        int rf_type;
  56        int rf_idx;
  57        unsigned rf_opt = 0;
  58
  59        argv++;
  60        /* Must have one or two params */
  61        if (!argv[0] || (argv[1] && argv[2]))
  62                bb_show_usage();
  63
  64        mode = O_RDWR | O_NONBLOCK;
  65        rf_name = argv[1];
  66        if (strcmp(argv[0], "list") == 0) {
  67                rf_opt |= OPT_l;
  68                mode = O_RDONLY | O_NONBLOCK;
  69        } else if (strcmp(argv[0], "block") == 0 && rf_name) {
  70                rf_opt |= OPT_b;
  71        } else if (strcmp(argv[0], "unblock") == 0 && rf_name) {
  72                rf_opt |= OPT_u;
  73        } else
  74                bb_show_usage();
  75
  76        rf_type = RFKILL_TYPE_ALL;
  77        rf_idx = -1;
  78        if (rf_name) {
  79                static const char rfkill_types[] ALIGN1 = "all\0wlan\0bluetooth\0uwb\0wimax\0wwan\0gps\0fm\0";
  80                if (strcmp(rf_name, "wifi") == 0)
  81                        rf_name = "wlan";
  82                if (strcmp(rf_name, "ultrawideband") == 0)
  83                        rf_name = "uwb";
  84                rf_type = index_in_strings(rfkill_types, rf_name);
  85                if (rf_type < 0) {
  86                        rf_idx = xatoi_positive(rf_name);
  87                }
  88        }
  89
  90        rf_fd = device_open("/dev/rfkill", mode);
  91        if (rf_fd < 0)
  92                bb_perror_msg_and_die("/dev/rfkill");
  93
  94        if (rf_opt & OPT_l) {
  95                while (full_read(rf_fd, &event, sizeof(event)) == RFKILL_EVENT_SIZE_V1) {
  96                        parser_t *parser;
  97                        char *tokens[2];
  98                        char rf_sysfs[sizeof("/sys/class/rfkill/rfkill%u/uevent") + sizeof(int)*3];
  99                        char *name, *type;
 100
 101                        if (rf_type && rf_type != event.type && rf_idx < 0) {
 102                                continue;
 103                        }
 104
 105                        if (rf_idx >= 0 && event.idx != rf_idx) {
 106                                continue;
 107                        }
 108
 109                        name = NULL;
 110                        type = NULL;
 111                        sprintf(rf_sysfs, "/sys/class/rfkill/rfkill%u/uevent", event.idx);
 112                        parser = config_open2(rf_sysfs, fopen_for_read);
 113                        while (config_read(parser, tokens, 2, 2, "\n=", PARSE_NORMAL)) {
 114                                if (strcmp(tokens[0], "RFKILL_NAME") == 0) {
 115                                        name = xstrdup(tokens[1]);
 116                                        continue;
 117                                }
 118                                if (strcmp(tokens[0], "RFKILL_TYPE") == 0) {
 119                                        type = xstrdup(tokens[1]);
 120                                        continue;
 121                                }
 122                        }
 123                        config_close(parser);
 124
 125                        printf("%u: %s: %s\n", event.idx, name, type);
 126                        printf("\tSoft blocked: %s\n", event.soft ? "yes" : "no");
 127                        printf("\tHard blocked: %s\n", event.hard ? "yes" : "no");
 128                        free(name);
 129                        free(type);
 130                }
 131        } else {
 132                memset(&event, 0, sizeof(event));
 133                if (rf_type >= 0) {
 134                        event.type = rf_type;
 135                        event.op = RFKILL_OP_CHANGE_ALL;
 136                }
 137
 138                if (rf_idx >= 0) {
 139                        event.idx = rf_idx;
 140                        event.op = RFKILL_OP_CHANGE;
 141                }
 142
 143                /* Note: OPT_b == 1 */
 144                event.soft = (rf_opt & OPT_b);
 145
 146                xwrite(rf_fd, &event, sizeof(event));
 147        }
 148
 149        return EXIT_SUCCESS;
 150}
 151