aboutsummaryrefslogtreecommitdiffstats
path: root/plugin_netdev.c
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--plugin_netdev.c148
1 files changed, 148 insertions, 0 deletions
diff --git a/plugin_netdev.c b/plugin_netdev.c
new file mode 100644
index 0000000..2c1b8b9
--- /dev/null
+++ b/plugin_netdev.c
@@ -0,0 +1,148 @@
+/* $Id: plugin_netdev.c,v 1.1 2004/01/25 05:30:09 reinelt Exp $
+ *
+ * plugin for /proc/net/dev parsing
+ *
+ * Copyright 2003 Michael Reinelt <reinelt@eunet.at>
+ * Copyright 2004 The LCD4Linux Team <lcd4linux-devel@users.sourceforge.net>
+ *
+ * This file is part of LCD4Linux.
+ *
+ * LCD4Linux is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * LCD4Linux is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ *
+ * $Log: plugin_netdev.c,v $
+ * Revision 1.1 2004/01/25 05:30:09 reinelt
+ * plugin_netdev for parsing /proc/net/dev added
+ *
+ */
+
+/*
+ * exported functions:
+ *
+ * int plugin_init_netdev (void)
+ * adds functions to access /proc/net/dev
+ *
+ */
+
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+#include <errno.h>
+
+#include "debug.h"
+#include "plugin.h"
+
+#include "hash.h"
+
+
+static HASH NetDev = { 0, };
+
+
+static void hash_set3 (char *key1, char *key2, char *key3, char *val)
+{
+ char key[32];
+
+ snprintf (key, sizeof(key), "%s.%s.%s", key1, key2, key3);
+ hash_set_delta (&NetDev, key, val);
+}
+
+
+static int parse_netdev (void)
+{
+ int age;
+ int line;
+ int RxTx=0; // position of Receive/Transmit switch
+ FILE *stream;
+
+ // reread every 10 msec only
+ age=hash_age(&NetDev, NULL, NULL);
+ if (age>0 && age<=10) return 0;
+
+ stream=fopen("/proc/net/dev", "r");
+ if (stream==NULL) {
+ error ("fopen(/proc/net/dev) failed: %s", strerror(errno));
+ return -1;
+ }
+
+ line=0;
+ while (!feof(stream)) {
+ char buffer[256];
+ char header[256];
+ char *head[32];
+ int col;
+
+ if (fgets (buffer, sizeof(buffer), stream) == NULL) break;
+
+ // skip line 1
+ if (++line<2) continue;
+
+ // line 2 used for headers
+ if (line==2) {
+ char *h;
+ strncpy(header, buffer, sizeof(header));
+ RxTx=(strrchr(header, '|') - header);
+ col=0;
+ h=strtok(header, "| \t\n");
+ while (h!=NULL) {
+ head[col++]=h;
+ h=strtok(NULL, "| \t\n");
+ }
+ } else {
+ char *h, *iface=NULL;
+ col=0;
+ h=strtok(buffer, ":| \t\n");
+ while (h!=NULL) {
+ if (col==0) {
+ iface=h;
+ } else {
+ hash_set3 (iface, (h-buffer) < RxTx ? "Rx" : "Tx", head[col], h);
+ }
+ h=strtok(NULL, "| \t\n");
+ col++;
+ }
+ }
+ }
+ fclose (stream);
+ return 0;
+}
+
+static void my_netdev (RESULT *result, RESULT *arg1, RESULT *arg2)
+{
+ char *key;
+ int delay;
+ double value;
+
+ if (parse_netdev()<0) {
+ SetResult(&result, R_STRING, "");
+ return;
+ }
+
+ key = R2S(arg1);
+ delay = R2N(arg2);
+
+ value = hash_get_regex(&NetDev, key, delay);
+
+ SetResult(&result, R_NUMBER, &value);
+}
+
+
+int plugin_init_netdev (void)
+{
+ AddFunction ("netdev", 2, my_netdev);
+ return 0;
+}
+