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commit 1a245a44f5aa793115eaaba3fc4f4024d14d97cf
parent 5d8fe3d9e9866ca15c33f5b263ae78585f0dd74f
Author: Markus Wichmann <nullplan@gmx.net>
Date:   Sun, 20 Dec 2015 13:17:14 +0100

Added yet another dwmstatus version, as announced on ML.

Diffstat:
A
dwm.suckless.org/dwmstatus/dwmclock-netstat.c
 | 
140
+++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++

1 file changed, 140 insertions(+), 0 deletions(-)
diff --git a/dwm.suckless.org/dwmstatus/dwmclock-netstat.c b/dwm.suckless.org/dwmstatus/dwmclock-netstat.c
@@ -0,0 +1,140 @@
+#include <X11/Xlib.h>
+#include <X11/Xatom.h>
+#include <time.h>
+#include <locale.h>
+#include <unistd.h>
+#include <stdio.h>
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <fcntl.h>
+#include <string.h>
+#include <stdint.h>
+#include <inttypes.h>
+#include <math.h>
+
+#define IFNAMSIZ 16
+
+
+static const char* determine_def_if(void) {
+    FILE *f;
+    const char* ret = 0;
+    static char buf[IFNAMSIZ];
+    char filebuf[256];
+    f = fopen("/proc/net/route", "r");
+    if (f) {
+        while (fgets(filebuf, sizeof filebuf, f)) {
+            char *tab = strchr(filebuf, '\t');
+            if (tab && !strncmp(tab + 1, "00000000", 8)) {
+                memcpy(buf, filebuf, tab - filebuf);
+                buf[tab - filebuf] = 0;
+                ret = buf;
+                break;
+            }
+        }
+        fclose(f);
+    }
+    return ret;
+}
+
+static uint64_t readfile(const char* filename) {
+    FILE* f;
+    uint64_t ret = 0, tmp;
+    f = fopen(filename, "r");
+    if (f) {
+        if (fscanf(f, "%"SCNu64, &tmp) == 1)
+            ret = tmp;
+        fclose(f);
+    }
+    return ret;
+}
+
+static uint64_t get_rx_bytes(const char* interface)
+{
+    char fnbuf[sizeof "/sys/class/net//statistics/rx_bytes" + IFNAMSIZ];
+    strcpy(fnbuf, "/sys/class/net/");
+    strcat(fnbuf, interface);
+    strcat(fnbuf, "/statistics/rx_bytes");
+    return readfile(fnbuf);
+}
+
+static uint64_t get_tx_bytes(const char* interface)
+{
+    char fnbuf[sizeof "/sys/class/net//statistics/rx_bytes" + IFNAMSIZ];
+    strcpy(fnbuf, "/sys/class/net/");
+    strcat(fnbuf, interface);
+    strcat(fnbuf, "/statistics/tx_bytes");
+    return readfile(fnbuf);
+}
+
+static int get_suff(uint64_t x)
+{
+    int r = -1 + !x;
+    while (x) {
+        r++;
+        x >>= 10;
+    }
+    return r;
+}
+
+int main(void) {
+    Display *dpy;
+    Window root;
+    int loadfd;
+
+    setlocale(LC_ALL, "");
+    dpy = XOpenDisplay(0);
+    if (dpy) {
+        struct timespec tm, s;
+        ssize_t rv;
+        char oldif[IFNAMSIZ] = {0};
+        uint64_t rxb, txb;
+        static const char suffixes[] = " KMGT"; // let's stay real here
+        root = XDefaultRootWindow(dpy);
+        clock_gettime(CLOCK_REALTIME, &tm);
+        s.tv_sec = 0;
+        s.tv_nsec = 1000000000 - tm.tv_nsec;
+        do rv = nanosleep(&s, &s);
+        while (rv == -1 && s.tv_nsec);
+        for (;;) {
+            char buf[100]; // estimate
+            const char *thisif = determine_def_if();
+            uint64_t currxb, curtxb;
+            int idx;
+            int i;
+            if (thisif)
+            {
+                if (strcmp(thisif, oldif))
+                {
+                    strcpy(oldif, thisif);
+                    rxb = txb = 0;
+                }
+                i = 0;
+                buf[i++] = oldif[0];
+                buf[i++] = ' ';
+                buf[i++] = 'v';
+                currxb = get_rx_bytes(oldif);
+                curtxb = get_tx_bytes(oldif);
+                idx = get_suff(currxb - rxb);
+                i += snprintf(buf + i, sizeof buf - i, "%.1f%c", (double)(currxb - rxb) / pow(1024, idx), suffixes[idx]);
+                rxb = currxb;
+                buf[i++] = ' ';
+                buf[i++] = '^';
+                idx = get_suff(curtxb - txb);
+                i += snprintf(buf + i, sizeof buf - i, "%.1f%c", (double)(curtxb - txb) / pow(1024, idx), suffixes[idx]);
+                txb = curtxb;
+            }
+            else
+                buf[i++] = 'n';
+            buf[i++] = ' ';
+            buf[i++] = '|';
+            buf[i++] = ' ';
+            time_t t;
+            size_t l;
+            t = time(0);
+            l = strftime(buf + i, sizeof buf - i, "%c", localtime(&t));
+            XStoreName(dpy, root, buf);
+            XSync(dpy, False);
+            sleep(1);
+        }
+    }
+}