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144 lines
3.1 KiB
144 lines
3.1 KiB
/*
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KSysGuard, the KDE System Guard
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Copyright (c) 1999, 2000 Chris Schlaeger <cs@kde.org>
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This program is free software; you can redistribute it and/or
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modify it under the terms of version 2 of the GNU General Public
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License as published by the Free Software Foundation.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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*/
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#include <sys/types.h>
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#include <sys/stat.h>
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#include <fcntl.h>
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#include <unistd.h>
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#include <stdio.h>
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#include "ksysguardd.h"
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#include "Command.h"
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#include "loadavg.h"
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static int LoadAvgOK = 0;
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static double LoadAvg1, LoadAvg5, LoadAvg15;
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#define LOADAVGBUFSIZE 128
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static char LoadAvgBuf[ LOADAVGBUFSIZE ];
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static int Dirty = 0;
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static void processLoadAvg( void )
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{
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sscanf( LoadAvgBuf, "%lf %lf %lf", &LoadAvg1, &LoadAvg5, &LoadAvg15 );
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Dirty = 0;
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}
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/*
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================================ public part =================================
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*/
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void initLoadAvg( struct SensorModul* sm )
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{
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if ( updateLoadAvg() < 0 ) {
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LoadAvgOK = -1;
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return;
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} else
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LoadAvgOK = 1;
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registerMonitor( "cpu/loadavg1", "float", printLoadAvg1, printLoadAvg1Info, sm );
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registerMonitor( "cpu/loadavg5", "float", printLoadAvg5, printLoadAvg5Info, sm );
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registerMonitor( "cpu/loadavg15", "float", printLoadAvg15, printLoadAvg15Info, sm );
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}
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void exitLoadAvg( void )
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{
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LoadAvgOK = -1;
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}
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int updateLoadAvg( void )
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{
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size_t n;
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int fd;
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if ( LoadAvgOK < 0 )
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return -1;
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if ( ( fd = open( "/proc/loadavg", O_RDONLY ) ) < 0 ) {
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if ( LoadAvgOK != 0 )
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print_error( "Cannot open file \'/proc/loadavg\'!\n"
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"The kernel needs to be compiled with support\n"
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"for /proc filesystem enabled!\n" );
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return -1;
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}
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if ( ( n = read( fd, LoadAvgBuf, LOADAVGBUFSIZE - 1 ) ) == LOADAVGBUFSIZE - 1 ) {
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log_error( "Internal buffer too small to read \'/proc/loadavg\'" );
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close( fd );
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return -1;
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}
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close( fd );
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LoadAvgBuf[ n ] = '\0';
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Dirty = 1;
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return 0;
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}
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void printLoadAvg1( const char* cmd )
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{
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(void)cmd;
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if ( Dirty )
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processLoadAvg();
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fprintf( CurrentClient, "%f\n", LoadAvg1 );
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}
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void printLoadAvg1Info( const char* cmd )
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{
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(void)cmd;
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fprintf( CurrentClient, "Load average 1 min\t0\t0\t\n" );
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}
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void printLoadAvg5( const char* cmd )
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{
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(void)cmd;
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if ( Dirty )
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processLoadAvg();
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fprintf( CurrentClient, "%f\n", LoadAvg5 );
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}
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void printLoadAvg5Info( const char* cmd )
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{
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(void)cmd;
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fprintf( CurrentClient, "Load average 5 min\t0\t0\t\n" );
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}
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void printLoadAvg15( const char* cmd )
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{
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(void)cmd;
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if ( Dirty )
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processLoadAvg();
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fprintf( CurrentClient, "%f\n", LoadAvg15 );
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}
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void printLoadAvg15Info( const char* cmd )
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{
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(void)cmd;
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fprintf( CurrentClient, "Load average 15 min\t0\t0\t\n" );
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}
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