source: MondoRescue/branches/3.3/mindi-busybox/miscutils/rfkill.c@ 3647

/* vi: set sw=4 ts=4: */
/*
* rfkill implementation for busybox
*
* Copyright (C) 2010  Malek Degachi <malek-degachi@laposte.net>
*
* Licensed under GPLv2 or later, see file LICENSE in this source tree.
*/

//config:config RFKILL
//config:   bool "rfkill"
//config:   default n # doesn't build on Ubuntu 9.04
//config:   select PLATFORM_LINUX
//config:   help
//config:     Enable/disable wireless devices.
//config:
//config:     rfkill list : list all wireless devices
//config:     rfkill list bluetooth : list all bluetooth devices
//config:     rfkill list 1 : list device corresponding to the given index
//config:     rfkill block|unblock wlan : block/unblock all wlan(wifi) devices
//config:

//applet:IF_RFKILL(APPLET(rfkill, BB_DIR_USR_SBIN, BB_SUID_DROP))

//kbuild:lib-$(CONFIG_RFKILL) += rfkill.o

//usage:#define rfkill_trivial_usage
//usage:       "COMMAND [INDEX|TYPE]"
//usage:#define rfkill_full_usage "\n\n"
//usage:       "Enable/disable wireless devices\n"
//usage:       "\nCommands:"
//usage:     "\n    list [INDEX|TYPE]   List current state"
//usage:     "\n    block INDEX|TYPE    Disable device"
//usage:     "\n    unblock INDEX|TYPE  Enable device"
//usage:     "\n"
//usage:     "\n    TYPE: all, wlan(wifi), bluetooth, uwb(ultrawideband),"
//usage:     "\n        wimax, wwan, gps, fm"

#include "libbb.h"
#include <linux/rfkill.h>

enum {
    OPT_b = (1 << 0), /* must be = 1 */
    OPT_u = (1 << 1),
    OPT_l = (1 << 2),
};

int rfkill_main(int argc, char **argv) MAIN_EXTERNALLY_VISIBLE;
int rfkill_main(int argc UNUSED_PARAM, char **argv)
{
    struct rfkill_event event;
    const char *rf_name;
    int rf_fd;
    int mode;
    int rf_type;
    int rf_idx;
    unsigned rf_opt = 0;

    argv++;
    /* Must have one or two params */
    if (!argv[0] || (argv[1] && argv[2]))
        bb_show_usage();

    mode = O_RDWR | O_NONBLOCK;
    rf_name = argv[1];
    if (strcmp(argv[0], "list") == 0) {
        rf_opt |= OPT_l;
        mode = O_RDONLY | O_NONBLOCK;
    } else if (strcmp(argv[0], "block") == 0 && rf_name) {
        rf_opt |= OPT_b;
    } else if (strcmp(argv[0], "unblock") == 0 && rf_name) {
        rf_opt |= OPT_u;
    } else
        bb_show_usage();

    rf_type = RFKILL_TYPE_ALL;
    rf_idx = -1;
    if (rf_name) {
        static const char rfkill_types[] ALIGN1 = "all\0wlan\0bluetooth\0uwb\0wimax\0wwan\0gps\0fm\0";
        if (strcmp(rf_name, "wifi") == 0)
            rf_name = "wlan";
        if (strcmp(rf_name, "ultrawideband") == 0)
            rf_name = "uwb";
        rf_type = index_in_strings(rfkill_types, rf_name);
        if (rf_type < 0) {
            rf_idx = xatoi_positive(rf_name);
        }
    }

    rf_fd = device_open("/dev/rfkill", mode);
    if (rf_fd < 0)
        bb_perror_msg_and_die("/dev/rfkill");

    if (rf_opt & OPT_l) {
        while (full_read(rf_fd, &event, sizeof(event)) == RFKILL_EVENT_SIZE_V1) {
            parser_t *parser;
            char *tokens[2];
            char rf_sysfs[sizeof("/sys/class/rfkill/rfkill%u/uevent") + sizeof(int)*3];
            char *name, *type;

            if (rf_type && rf_type != event.type && rf_idx < 0) {
                continue;
            }

            if (rf_idx >= 0 && event.idx != rf_idx) {
                continue;
            }

            name = NULL;
            type = NULL;
            sprintf(rf_sysfs, "/sys/class/rfkill/rfkill%u/uevent", event.idx);
            parser = config_open2(rf_sysfs, fopen_for_read);
            while (config_read(parser, tokens, 2, 2, "\n=", PARSE_NORMAL)) {
                if (strcmp(tokens[0], "RFKILL_NAME") == 0) {
                    name = xstrdup(tokens[1]);
                    continue;
                }
                if (strcmp(tokens[0], "RFKILL_TYPE") == 0) {
                    type = xstrdup(tokens[1]);
                    continue;
                }
            }
            config_close(parser);

            printf("%u: %s: %s\n", event.idx, name, type);
            printf("\tSoft blocked: %s\n", event.soft ? "yes" : "no");
            printf("\tHard blocked: %s\n", event.hard ? "yes" : "no");
            free(name);
            free(type);
        }
    } else {
        memset(&event, 0, sizeof(event));
        if (rf_type >= 0) {
            event.type = rf_type;
            event.op = RFKILL_OP_CHANGE_ALL;
        }

        if (rf_idx >= 0) {
            event.idx = rf_idx;
            event.op = RFKILL_OP_CHANGE;
        }

        /* Note: OPT_b == 1 */
        event.soft = (rf_opt & OPT_b);

        xwrite(rf_fd, &event, sizeof(event));
    }

    return EXIT_SUCCESS;
}