components/netspeeds.c

   1 /* See LICENSE file for copyright and license details. */
   2 #include <stdio.h>
   3 #include <limits.h>
   4
   5 #include "../util.h"
   6
   7 #if defined(__linux__)
   8         const char *
   9         netspeed_rx(const char *interface)
  10         {
  11                 static int valid;
  12                 static unsigned long long rxbytes;
  13                 unsigned long oldrxbytes;
  14                 extern const unsigned int interval;
  15                 char path[PATH_MAX];
  16
  17                 oldrxbytes = rxbytes;
  18                 snprintf(path, sizeof(path), "/sys/class/net/%s/statistics/rx_bytes", interface);
  19                 if (pscanf(path, "%llu", &rxbytes) != 1) {
  20                         return NULL;
  21                 }
  22                 if (!valid) {
  23                         valid = 1;
  24                         return NULL;
  25                 }
  26
  27                 return fmt_scaled((rxbytes - oldrxbytes) / interval * 1000);
  28         }
  29
  30         const char *
  31         netspeed_tx(const char *interface)
  32         {
  33                 static int valid;
  34                 static unsigned long long txbytes;
  35                 unsigned long oldtxbytes;
  36                 extern const unsigned int interval;
  37                 char path[PATH_MAX];
  38
  39                 oldtxbytes = txbytes;
  40                 snprintf(path, sizeof(path), "/sys/class/net/%s/statistics/tx_bytes", interface);
  41                 if (pscanf(path, "%llu", &txbytes) != 1) {
  42                         return NULL;
  43                 }
  44                 if (!valid) {
  45                         valid = 1;
  46                         return NULL;
  47                 }
  48
  49                 return fmt_scaled((txbytes - oldtxbytes) / interval * 1000);
  50         }
  51 #elif defined(__OpenBSD__)
  52         /* unimplemented */
  53 #endif