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annotate toys/other/rfkill.c @ 1727:c0ef9b7976f0 draft

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Use xsignal() instead of signal().
author Rob Landley <rob@landley.net>
date Tue, 10 Mar 2015 11:07:28 -0500
parents 3ac823675413
children 57f2a26fa92c
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8868e482963e rfkill - enable/disable the radio devices
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1 /* rfkill.c - Enable/disable wireless devices.
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2 *
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3 * Copyright 2014 Ranjan Kumar <ranjankumar.bth@gmail.com>
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4 * Copyright 2014 Kyungwan Han <asura321@gmail.com>
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5 *
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6 * No Standard
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7
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8 USE_RFKILL(NEWTOY(rfkill, "<1>2", TOYFLAG_SBIN))
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9
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10 config RFKILL
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11 bool "rfkill"
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12 default y
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13 help
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14 Usage: rfkill COMMAND [DEVICE]
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15
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16 Enable/disable wireless devices.
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17
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18 Commands:
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19 list [DEVICE] List current state
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20 block DEVICE Disable device
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21 unblock DEVICE Enable device
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22
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23 DEVICE is an index number, or one of:
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24 all, wlan(wifi), bluetooth, uwb(ultrawideband), wimax, wwan, gps, fm.
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25 */
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26
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27 #define FOR_rfkill
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28 #include "toys.h"
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29 #include <linux/rfkill.h>
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30
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31 void rfkill_main(void)
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32 {
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33 struct rfkill_event rfevent;
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34 int fd, tvar, idx = -1, tid = RFKILL_TYPE_ALL;
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35 char **optargs = toys.optargs;
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36
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37 // Parse command line options
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38 for (tvar = 0; tvar < 3; tvar++)
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39 if (!strcmp((char *[]){"list", "block", "unblock"}[tvar], *optargs)) break;
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40 if (tvar == 3) error_exit("unknown cmd '%s'", *optargs);
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41 if (tvar) {
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42 int i;
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43 struct arglist {
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44 char *name;
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45 int idx;
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46 } rftypes[] = {{"all", RFKILL_TYPE_ALL}, {"wifi", RFKILL_TYPE_WLAN},
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47 {"wlan", RFKILL_TYPE_WLAN}, {"bluetooth", RFKILL_TYPE_BLUETOOTH},
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48 {"uwb", RFKILL_TYPE_UWB}, {"ultrawideband", RFKILL_TYPE_UWB},
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49 {"wimax", RFKILL_TYPE_WIMAX}, {"wwan", RFKILL_TYPE_WWAN},
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50 {"gps", RFKILL_TYPE_GPS}, {"fm", 7}}; // RFKILL_TYPE_FM = 7
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51
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52 if (!*++optargs) error_exit("'%s' needs IDENTIFIER", optargs[-1]);
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53 for (i = 0; i < ARRAY_LEN(rftypes); i++)
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54 if (!strcmp(rftypes[i].name, *optargs)) break;
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55 if (i == ARRAY_LEN(rftypes)) idx = atolx_range(*optargs, 0, INT_MAX);
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56 else tid = rftypes[i].idx;
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57 }
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58
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59 // Perform requested action
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60 fd = xopen("/dev/rfkill", (tvar ? O_RDWR : O_RDONLY)|O_NONBLOCK);
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61 if (tvar) {
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62 // block/unblock
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63 memset(&rfevent, 0, sizeof(rfevent));
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64 rfevent.soft = tvar == 1;
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65 if (idx >= 0) {
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66 rfevent.idx = idx;
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67 rfevent.op = RFKILL_OP_CHANGE;
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68 } else {
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69 rfevent.type = tid;
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70 rfevent.op = RFKILL_OP_CHANGE_ALL;
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71 }
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72 xwrite(fd, &rfevent, sizeof(rfevent));
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73 } else {
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74 // show list.
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75 while (sizeof(rfevent) == readall(fd, &rfevent, sizeof(rfevent))) {
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76 char *line, *name = 0, *type = 0;
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77
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78 // filter list items
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79 if ((tid > 0 && tid != rfevent.type) || (idx != -1 && idx != rfevent.idx))
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80 continue;
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81
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82 sprintf(toybuf, "/sys/class/rfkill/rfkill%u/uevent", rfevent.idx);
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83 tvar = xopen(toybuf, O_RDONLY);
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84 while ((line = get_line(tvar))) {
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85 char *s = line;
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86
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87 if (strstart(&s, "RFKILL_NAME=")) name = xstrdup(s);
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88 else if (strstart(&s, "RFKILL_TYPE=")) type = xstrdup(s);
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89
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90 free(line);
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91 }
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92 xclose(tvar);
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93
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94 xprintf("%u: %s: %s\n", rfevent.idx, name, type);
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95 xprintf("\tSoft blocked: %s\n", rfevent.soft ? "yes" : "no");
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96 xprintf("\tHard blocked: %s\n", rfevent.hard ? "yes" : "no");
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97 free(name);
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98 free(type);
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99 }
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100 }
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101 xclose(fd);
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102 }