components/netspeeds.c
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/* See LICENSE file for copyright and license details. */
#include <stdio.h>
#include <limits.h>
#include "../util.h"
#if defined(__linux__)
const char *
netspeed_rx(const char *interface)
{
static int valid;
static unsigned long long rxbytes;
unsigned long oldrxbytes;
extern const unsigned int interval;
char path[PATH_MAX];
oldrxbytes = rxbytes;
snprintf(path, sizeof(path), "/sys/class/net/%s/statistics/rx_bytes", interface);
if (pscanf(path, "%llu", &rxbytes) != 1) {
return NULL;
}
if (!valid) {
valid = 1;
return NULL;
}
return fmt_scaled((rxbytes - oldrxbytes) / interval * 1000);
}
const char *
netspeed_tx(const char *interface)
{
static int valid;
static unsigned long long txbytes;
unsigned long oldtxbytes;
extern const unsigned int interval;
char path[PATH_MAX];
oldtxbytes = txbytes;
snprintf(path, sizeof(path), "/sys/class/net/%s/statistics/tx_bytes", interface);
if (pscanf(path, "%llu", &txbytes) != 1) {
return NULL;
}
if (!valid) {
valid = 1;
return NULL;
}
return fmt_scaled((txbytes - oldtxbytes) / interval * 1000);
}
#elif defined(__OpenBSD__)
/* unimplemented */
#endif