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/*
KSysGuard, the KDE System Guard
Copyright (c) 1999, 2000 Chris Schlaeger <cs@kde.org>
This program is free software; you can redistribute it and/or
modify it under the terms of version 2 of the GNU General Public
License as published by the Free Software Foundation.
This program 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., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
*/
#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdio.h>
#include "ksysguardd.h"
#include "Command.h"
#include "loadavg.h"
static int LoadAvgOK = 0;
static double LoadAvg1, LoadAvg5, LoadAvg15;
#define LOADAVGBUFSIZE 128
static char LoadAvgBuf[ LOADAVGBUFSIZE ];
static int Dirty = 0;
static void processLoadAvg( void )
{
sscanf( LoadAvgBuf, "%lf %lf %lf", &LoadAvg1, &LoadAvg5, &LoadAvg15 );
Dirty = 0;
}
/*
================================ public part =================================
*/
void initLoadAvg( struct SensorModul* sm )
{
if ( updateLoadAvg() < 0 ) {
LoadAvgOK = -1;
return;
} else
LoadAvgOK = 1;
registerMonitor( "cpu/loadavg1", "float", printLoadAvg1, printLoadAvg1Info, sm );
registerMonitor( "cpu/loadavg5", "float", printLoadAvg5, printLoadAvg5Info, sm );
registerMonitor( "cpu/loadavg15", "float", printLoadAvg15, printLoadAvg15Info, sm );
}
void exitLoadAvg( void )
{
LoadAvgOK = -1;
}
int updateLoadAvg( void )
{
size_t n;
int fd;
if ( LoadAvgOK < 0 )
return -1;
if ( ( fd = open( "/proc/loadavg", O_RDONLY ) ) < 0 ) {
if ( LoadAvgOK != 0 )
print_error( "Cannot open file \'/proc/loadavg\'!\n"
"The kernel needs to be compiled with support\n"
"for /proc filesystem enabled!\n" );
return -1;
}
if ( ( n = read( fd, LoadAvgBuf, LOADAVGBUFSIZE - 1 ) ) == LOADAVGBUFSIZE - 1 ) {
log_error( "Internal buffer too small to read \'/proc/loadavg\'" );
close( fd );
return -1;
}
close( fd );
LoadAvgBuf[ n ] = '\0';
Dirty = 1;
return 0;
}
void printLoadAvg1( const char* cmd )
{
(void)cmd;
if ( Dirty )
processLoadAvg();
fprintf( CurrentClient, "%f\n", LoadAvg1 );
}
void printLoadAvg1Info( const char* cmd )
{
(void)cmd;
fprintf( CurrentClient, "Load average 1 min\t0\t0\t\n" );
}
void printLoadAvg5( const char* cmd )
{
(void)cmd;
if ( Dirty )
processLoadAvg();
fprintf( CurrentClient, "%f\n", LoadAvg5 );
}
void printLoadAvg5Info( const char* cmd )
{
(void)cmd;
fprintf( CurrentClient, "Load average 5 min\t0\t0\t\n" );
}
void printLoadAvg15( const char* cmd )
{
(void)cmd;
if ( Dirty )
processLoadAvg();
fprintf( CurrentClient, "%f\n", LoadAvg15 );
}
void printLoadAvg15Info( const char* cmd )
{
(void)cmd;
fprintf( CurrentClient, "Load average 15 min\t0\t0\t\n" );
}
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