[lcd4linux @ 2004-01-16 05:04:53 by 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, ...)

git-svn-id: https://ssl.bulix.org/svn/lcd4linux/trunk@314 3ae390bd-cb1e-0410-b409-cd5a39f66f1f

plugin_proc_stat.c

@@ -0,0 +1,146 @@
+/* $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;
+}
+