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-rw-r--r--plugin_proc_stat.c146
1 files changed, 146 insertions, 0 deletions
diff --git a/plugin_proc_stat.c b/plugin_proc_stat.c
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+/* $Id: plugin_proc_stat.c,v 1.1 2004/01/16 05:04:53 reinelt Exp $
+ *
+ * plugin for /proc/stat 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_proc_stat.c,v $
+ * Revision 1.1 2004/01/16 05:04:53 reinelt
+ * started plugin proc_stat which should parse /proc/stat
+ * which again is a paint in the a**
+ * thinking over implementation methods of delta functions
+ * (CPU load, ...)
+ *
+ */
+
+/*
+ * exported functions:
+ *
+ * int plugin_init_proc_stat (void)
+ * adds functions to access /proc/stat
+ *
+ */
+
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+#include <errno.h>
+#include <time.h>
+#include <sys/time.h>
+
+#include "debug.h"
+#include "plugin.h"
+#include "hash.h"
+
+
+static HASH Stat = { 0, 0, NULL };
+
+static int renew(int msec)
+{
+ static struct timeval end = {0, 0};
+ struct timeval now;
+
+ // update every 10 msec
+ gettimeofday(&now, NULL);
+ if (now.tv_sec==end.tv_sec?now.tv_usec<end.tv_usec:now.tv_sec<end.tv_sec) {
+ return 0;
+ }
+ end.tv_sec = now.tv_sec;
+ end.tv_usec = now.tv_usec + 1000*msec;
+ while (end.tv_usec > 1000000) {
+ end.tv_usec -= 1000000;
+ end.tv_sec++;
+ }
+ return 1;
+}
+
+
+static int parse_proc_stat (void)
+{
+ FILE *stream;
+
+ // update every 10 msec
+ if (!renew(10)) return 0;
+
+ // destroy previous hash table
+ hash_destroy (&Stat);
+
+ stream=fopen("/proc/stat", "r");
+ if (stream==NULL) {
+ error ("fopen(/proc/stat) failed: %s", strerror(errno));
+ return -1;
+ }
+
+ while (!feof(stream)) {
+ char buffer[256];
+ fgets (buffer, sizeof(buffer), stream);
+
+ if (strncmp(buffer, "cpu", 3)==0) {
+ unsigned long v1, v2, v3, v4;
+ debug ("Michi: buffer=<%s>", buffer);
+ if (sscanf(buffer+4, " %lu %lu %lu %lu", &v1, &v2, &v3, &v4)==4) {
+ debug ("Michi: v1=<%ld> v2=<%ld> v3=<%ld> v4=<%ld>", v1, v2, v3, v4);
+ }
+ }
+ else if (strncmp(buffer, "page ", 5)==0) {
+
+ }
+ else if (strncmp(buffer, "swap ", 5)==0) {
+ }
+ else if (strncmp(buffer, "intr ", 5)==0) {
+ }
+ else if (strncmp(buffer, "disk_io:", 8)==0) {
+ }
+ else if (strncmp(buffer, "ctxt ", 5)==0) {
+ }
+ else if (strncmp(buffer, "btime ", 5)==0) {
+ }
+ else if (strncmp(buffer, "processes ", 5)==0) {
+ }
+ else {
+ error ("unknown line <%s> from /proc/stat");
+ }
+ }
+ fclose (stream);
+ return 0;
+}
+
+static void my_proc_stat (RESULT *result, RESULT *arg1)
+{
+ char *key, *val;
+
+ parse_proc_stat();
+
+ key=R2S(arg1);
+ val="";
+
+ SetResult(&result, R_STRING, "");
+}
+
+
+int plugin_init_proc_stat (void)
+{
+ AddFunction ("stat", 1, my_proc_stat);
+ return 0;
+}
+