rfkill.c revision 027a73a903af306449710ce12bc09e0e3550c6c9 
1/* rfkill.c - Enable/disable wireless devices.
2 *
3 * Copyright 2014 Ranjan Kumar <ranjankumar.bth@gmail.com>
4 * Copyright 2014 Kyungwan Han <asura321@gmail.com>
5 *
6 * No Standard
7
8USE_RFKILL(NEWTOY(rfkill, "<1>2", TOYFLAG_USR|TOYFLAG_SBIN))
9
10config RFKILL
11  bool "rfkill"
12  default y
13  help
14    Usage: rfkill COMMAND [DEVICE]
15
16    Enable/disable wireless devices.
17
18    Commands:
19    list [DEVICE]   List current state
20    block DEVICE    Disable device
21    unblock DEVICE  Enable device
22
23    DEVICE is an index number, or one of:
24    all, wlan(wifi), bluetooth, uwb(ultrawideband), wimax, wwan, gps, fm.
25*/
26
27#define FOR_rfkill
28#include "toys.h"
29#include <linux/rfkill.h>
30
31void rfkill_main(void)
32{
33  struct rfkill_event rfevent;
34  int fd, tvar, idx = -1, tid = RFKILL_TYPE_ALL;
35  char **optargs = toys.optargs;
36
37  // Parse command line options
38  for (tvar = 0; tvar < 3; tvar++)
39    if (!strcmp((char *[]){"list", "block", "unblock"}[tvar], *optargs)) break;
40  if (tvar == 3) error_exit("unknown cmd '%s'", *optargs);
41  if (tvar) {
42    int i;
43    struct arglist {
44      char *name;
45      int idx;
46    } rftypes[] = {{"all", RFKILL_TYPE_ALL}, {"wifi", RFKILL_TYPE_WLAN},
47      {"wlan", RFKILL_TYPE_WLAN}, {"bluetooth", RFKILL_TYPE_BLUETOOTH},
48      {"uwb", RFKILL_TYPE_UWB}, {"ultrawideband", RFKILL_TYPE_UWB},
49      {"wimax", RFKILL_TYPE_WIMAX}, {"wwan", RFKILL_TYPE_WWAN},
50      {"gps", RFKILL_TYPE_GPS}, {"fm", 7}}; // RFKILL_TYPE_FM = 7
51
52    if (!*++optargs) error_exit("'%s' needs IDENTIFIER", optargs[-1]);
53    for (i = 0; i < ARRAY_LEN(rftypes); i++)
54      if (!strcmp(rftypes[i].name, *optargs)) break;
55    if (i == ARRAY_LEN(rftypes)) idx = atolx_range(*optargs, 0, INT_MAX);
56    else tid = rftypes[i].idx;
57  }
58
59  // Perform requested action
60  fd = xopen("/dev/rfkill", (tvar ? O_RDWR : O_RDONLY)|O_NONBLOCK);
61  if (tvar) {
62    // block/unblock
63    memset(&rfevent, 0, sizeof(rfevent));
64    rfevent.soft = tvar == 1;
65    if (idx >= 0) {
66      rfevent.idx = idx;
67      rfevent.op = RFKILL_OP_CHANGE;
68    } else {
69      rfevent.type = tid;
70      rfevent.op = RFKILL_OP_CHANGE_ALL;
71    }
72    xwrite(fd, &rfevent, sizeof(rfevent));
73  } else {
74    // show list.
75    while (sizeof(rfevent) == readall(fd, &rfevent, sizeof(rfevent))) {
76      char *line, *name = 0, *type = 0;
77
78      // filter list items
79      if ((tid > 0 && tid != rfevent.type) || (idx != -1 && idx != rfevent.idx))
80        continue;
81
82      sprintf(toybuf, "/sys/class/rfkill/rfkill%u/uevent", rfevent.idx);
83      tvar = xopenro(toybuf);
84      while ((line = get_line(tvar))) {
85        char *s = line;
86
87        if (strstart(&s, "RFKILL_NAME=")) name = xstrdup(s);
88        else if (strstart(&s, "RFKILL_TYPE=")) type = xstrdup(s);
89
90        free(line);
91      }
92      xclose(tvar);
93
94      xprintf("%u: %s: %s\n", rfevent.idx, name, type);
95      xprintf("\tSoft blocked: %s\n", rfevent.soft ? "yes" : "no");
96      xprintf("\tHard blocked: %s\n", rfevent.hard ? "yes" : "no");
97      free(name);
98      free(type);
99    }
100  }
101  xclose(fd);
102}
103