git.sur5r.net Git - i3/i3status/blob - src/print_wireless_info.c

   1 // vim:ts=8:expandtab
   2 #include <stdio.h>
   3 #include <stdlib.h>
   4 #include <string.h>
   5 #include <ctype.h>
   6 #include <limits.h>
   7
   8 #ifdef LINUX
   9 #include <iwlib.h>
  10 #endif
  11
  12 #include "i3status.h"
  13
  14 static const char *get_wireless_essid(const char *interface) {
  15         static char part[512];
  16 #ifdef LINUX
  17         int skfd;
  18         if ((skfd = iw_sockets_open()) < 0) {
  19                 perror("socket");
  20                 exit(-1);
  21         }
  22         struct wireless_config wcfg;
  23         if (iw_get_basic_config(skfd, interface, &wcfg) >= 0)
  24                 snprintf(part, sizeof(part), "%s", wcfg.essid);
  25         else part[0] = '\0';
  26         (void)close(skfd);
  27 #else
  28         part[0] = '\0';
  29 #endif
  30         return part;
  31 }
  32
  33 /*
  34  * Just parses /proc/net/wireless looking for lines beginning with
  35  * wlan_interface, extracting the quality of the link and adding the
  36  * current IP address of wlan_interface.
  37  *
  38  */
  39 void print_wireless_info(const char *interface, const char *format_up, const char *format_down) {
  40         char buf[1024];
  41         int quality = -1;
  42         char *interfaces;
  43         const char *walk;
  44         memset(buf, 0, sizeof(buf));
  45
  46         if (!slurp("/proc/net/wireless", buf, sizeof(buf)))
  47                 die("Could not open \"/proc/net/wireless\"\n");
  48
  49         interfaces = skip_character(buf, '\n', 1) + 1;
  50         while ((interfaces = skip_character(interfaces, '\n', 1)+1) < buf+strlen(buf)) {
  51                 while (isspace((int)*interfaces))
  52                         interfaces++;
  53                 if (!BEGINS_WITH(interfaces, interface))
  54                         continue;
  55                 if (sscanf(interfaces, "%*[^:]: 0000 %d", &quality) != 1)
  56                         continue;
  57                 break;
  58         }
  59
  60         /* Interface could not be found */
  61         if (quality == -1)
  62                 return;
  63
  64         if ((quality == UCHAR_MAX) || (quality == 0)) {
  65                 walk = format_down;
  66                 printf("%s", color("#FF0000"));
  67         } else {
  68                 printf("%s", color("#00FF00"));
  69                 walk = format_up;
  70         }
  71
  72         for (; *walk != '\0'; walk++) {
  73                 if (*walk != '%') {
  74                         putchar(*walk);
  75                         continue;
  76                 }
  77
  78                 if (BEGINS_WITH(walk+1, "quality")) {
  79                         (void)printf("%03d%%", quality);
  80                         walk += strlen("quality");
  81                 }
  82
  83                 if (BEGINS_WITH(walk+1, "essid")) {
  84                         (void)printf("%s", get_wireless_essid(interface));
  85                         walk += strlen("essid");
  86                 }
  87
  88                 if (BEGINS_WITH(walk+1, "ip")) {
  89                         (void)printf("%s", get_ip_addr(interface));
  90                         walk += strlen("ip");
  91                 }
  92         }
  93
  94         (void)printf("%s", endcolor());
  95 }