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/* $Id: plugin_proc_stat.c,v 1.2 2004/01/16 07:26:25 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 1.2 2004/01/16 07:26:25 reinelt
* moved various /proc parsing to own functions
* made some progress with /proc/stat parsing
*
* 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 void my_hash_set (char *key1, char *key2, char *val)
{
char key[16];
snprintf (key, sizeof(key), "%s.%s", key1, key2);
debug ("Michi: hash_set(%s, %s)", key, val);
hash_set (&Stat, key, val);
}
static int parse_proc_stat (void)
{
FILE *stream;
// update every 10 msec
if (!renew(10)) return 0;
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) {
char *cpu;
cpu=strtok(buffer, " \t");
my_hash_set (cpu, "user", strtok(NULL, " \t"));
my_hash_set (cpu, "nice", strtok(NULL, " \t"));
my_hash_set (cpu, "system", strtok(NULL, " \t"));
my_hash_set (cpu, "idle", strtok(NULL, " \t"));
}
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;
if (parse_proc_stat()<0) {
SetResult(&result, R_STRING, "");
return;
}
key=R2S(arg1);
val=hash_get(&Stat, key);
if (val==NULL) val="";
SetResult(&result, R_STRING, val);
}
int plugin_init_proc_stat (void)
{
AddFunction ("stat", 1, my_proc_stat);
return 0;
}
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