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