[hackers] [slstatus] Add network speed functions || Aaron Marcher

[git]

commit 0d05b3d13d42f8bebc74bb5f6da7e5e10c0e9933
Author:     Aaron Marcher <m...@drkhsh.at>
AuthorDate: Sat May 19 00:31:33 2018 +0200
Commit:     Aaron Marcher <m...@drkhsh.at>
CommitDate: Sat May 19 00:31:33 2018 +0200

    Add network speed functions

diff --git a/Makefile b/Makefile
index b9d7695..0e925cc 100644
--- a/Makefile
+++ b/Makefile
@@ -16,6 +16,7 @@ COM =\
        components/kernel_release\
        components/keyboard_indicators\
        components/load_avg\
+       components/netspeeds\
        components/num_files\
        components/ram\
        components/run_command\
diff --git a/README b/README
index ec6a5a3..c278599 100644
--- a/README
+++ b/README
@@ -19,6 +19,7 @@ Features
 - Kernel version
 - Keyboard indicators
 - Load average
+- Network speeds (RX and TX)
 - Number of files in a directory (hint: Maildir)
 - Memory status (free memory, percentage, total memory and used memory)
 - Swap status (free swap, percentage, total swap and used swap)
diff --git a/components/netspeeds.c b/components/netspeeds.c
new file mode 100644
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
diff --git a/slstatus.h b/slstatus.h
index abe28d3..8bd8bb5 100644
--- a/slstatus.h
+++ b/slstatus.h
@@ -37,6 +37,10 @@ const char *keyboard_indicators(void);
 /* load_avg */
 const char *load_avg(const char *);
 
+/* netspeeds */
+const char *netspeed_rx(const char *);
+const char *netspeed_tx(const char *);
+
 /* num_files */
 const char *num_files(const char *);