statuses/netif.c

   1 #include <stdio.h>
   2 #include <stdlib.h>
   3 #include <fcntl.h>
   4 #include <unistd.h>
   5 #include <string.h>
   6 #include "netif.h"
   7 #include "tools.h"
   8 #include "../config.h"
   9
  10 #ifndef NETIF_BASEDIR
  11         #define NETIF_BASEDIR "/sys/class/net/"
  12 #endif
  13
  14
  15 void status_netif(char *ifname)
  16 {
  17         char ifpath[256];
  18         int ifpathlen;
  19
  20         char stline[16];
  21         size_t stlen;
  22
  23         double ifsum = 0.0;
  24         int ifsumpower;
  25
  26
  27         // Prepare path
  28         ifpathlen = sizeof(NETIF_BASEDIR) - 1 + strlen(ifname);
  29         if (ifpathlen + 1 + sizeof("/statistics/rx_bytes") >= sizeof(ifpath))
  30         {
  31                 statusError("status_netif",
  32                         "ifpath buffer too small",
  33                         ifname);
  34                 return;
  35         }
  36         strcpy(ifpath, NETIF_BASEDIR);
  37         strcat(ifpath, ifname);
  38
  39
  40         // Is the interface up?
  41         if (access(ifpath, F_OK))
  42         {
  43                 //printf(" ^fg(grey)[%s] ", ifname);
  44                 return;
  45         }
  46
  47
  48         strcpy(&ifpath[ifpathlen], "/carrier");
  49         stlen = fileRead(stline, sizeof(stline), ifpath);
  50         if (stlen > 0)
  51         {
  52                 if (stline[0] == '1')
  53                 {
  54                         fputs("^fg(yellow)", stdout);
  55                 }
  56                 else
  57                 {
  58                         //fputs("^fg(red)", stdout);
  59                         return;
  60                 }
  61         }
  62
  63         strcpy(&ifpath[ifpathlen], "/statistics/rx_bytes");
  64         stlen = fileRead(stline, sizeof(stline), ifpath);
  65         if (stlen > 0)
  66                 ifsum = atof(stline);
  67
  68         strcpy(&ifpath[ifpathlen], "/statistics/tx_bytes");
  69         stlen = fileRead(stline, sizeof(stline), ifpath);
  70         if (stlen > 0)
  71                 ifsum += atof(stline);
  72
  73
  74         for(ifsumpower = 0; ifsum >= 1024.0; ifsumpower++)
  75                 ifsum = ifsum / 1024;
  76
  77         printf(" %s: %.*f %c ", ifname,
  78                                 ifsumpower ? ifsumpower - 1 : ifsumpower,
  79                                 ifsum,
  80                                 powerToChar(ifsumpower));
  81 }