Add network speed functions

[slstatus.git] / components / netspeeds.c

diff --git a/components/netspeeds.c b/components/netspeeds.c
new file mode 100644 (file)
index 0000000..ef8bf93
--- /dev/null
+++ b/components/netspeeds.c
@@ -0,0 +1,53 @@
+/* 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