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 
8 USE_RFKILL(NEWTOY(rfkill, "<1>2", TOYFLAG_USR|TOYFLAG_SBIN))
9 
10 config 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 
31 void 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