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/*
KSysGuard, the KDE System Guard
Copyright (c) 2000-2001 Chris Schlaeger <[email protected]>
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 <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <ctype.h>
#include <time.h>
#include "Command.h"
#include "ksysguardd.h"
#include "cpuinfo.h"
static int CpuInfoOK = 0;
static float* Clocks = 0;
static int CPUs = 0;
#define CPUINFOBUFSIZE (32 * 1024)
static char CpuInfoBuf[ CPUINFOBUFSIZE ];
static int Dirty = 0;
static struct SensorModul *CpuInfoSM;
static void processCpuInfo( void )
{
char format[ 32 ];
char tag[ 32 ];
char value[ 256 ];
char* cibp = CpuInfoBuf;
int cpuId = 0;
if ( !CpuInfoOK )
return;
sprintf( format, "%%%d[^:]: %%%d[^\n]\n", (int)sizeof( tag ) - 1,
(int)sizeof( value ) - 1 );
while ( sscanf( cibp, format, tag, value ) == 2 ) {
char* p;
tag[ sizeof( tag ) - 1 ] = '\0';
value[ sizeof( value ) - 1 ] = '\0';
/* remove trailing whitespaces */
p = tag + strlen( tag ) - 1;
/* remove trailing whitespaces */
while ( ( *p == ' ' || *p == '\t' ) && p > tag )
*p-- = '\0';
if ( strcmp( tag, "processor" ) == 0 ) {
if ( sscanf( value, "%d", &cpuId ) == 1 ) {
if ( cpuId >= CPUs ) {
char cmdName[ 24 ];
if ( Clocks )
free( Clocks );
CPUs = cpuId + 1;
Clocks = malloc( CPUs * sizeof( float ) );
snprintf( cmdName, sizeof( cmdName ) - 1, "cpu%d/clock", cpuId );
registerMonitor( cmdName, "float", printCPUxClock, printCPUxClockInfo,
CpuInfoSM );
}
}
} else if ( strcmp( tag, "cpu MHz" ) == 0 )
sscanf( value, "%f", &Clocks[ cpuId ] );
/* Move cibp to begining of next line, if there is one. */
cibp = strchr( cibp, '\n' );
if ( cibp )
cibp++;
else
cibp = CpuInfoBuf + strlen( CpuInfoBuf );
}
Dirty = 0;
}
/*
================================ public part =================================
*/
void initCpuInfo( struct SensorModul* sm )
{
CpuInfoSM = sm;
if ( updateCpuInfo() < 0 )
return;
processCpuInfo();
}
void exitCpuInfo( void )
{
CpuInfoOK = -1;
free( Clocks );
}
int updateCpuInfo( void )
{
size_t n;
int fd;
if ( CpuInfoOK < 0 )
return -1;
if ( ( fd = open( "/proc/cpuinfo", O_RDONLY ) ) < 0 ) {
if ( CpuInfoOK != 0 )
print_error( "Cannot open file \'/proc/cpuinfo\'!\n"
"The kernel needs to be compiled with support\n"
"for /proc filesystem enabled!\n" );
CpuInfoOK = -1;
return -1;
}
n = 0;
for(;;) {
ssize_t len = read( fd, CpuInfoBuf + n, CPUINFOBUFSIZE - 1 - n );
if( len < 0 ) {
print_error( "Failed to read file \'/proc/cpuinfo\'!\n" );
CpuInfoOK = -1;
close( fd );
return -1;
}
n += len;
if( len == 0 ) /* reading finished */
break;
if( n == CPUINFOBUFSIZE - 1 ) {
log_error( "Internal buffer too small to read \'/proc/cpuinfo\'" );
CpuInfoOK = 0;
close( fd );
return -1;
}
}
close( fd );
CpuInfoOK = 1;
CpuInfoBuf[ n ] = '\0';
Dirty = 1;
return 0;
}
void printCPUxClock( const char* cmd )
{
int id;
if ( Dirty )
processCpuInfo();
sscanf( cmd + 3, "%d", &id );
fprintf( CurrentClient, "%f\n", Clocks[ id ] );
}
void printCPUxClockInfo( const char* cmd )
{
int id;
sscanf( cmd + 3, "%d", &id );
fprintf( CurrentClient, "CPU%d Clock Frequency\t0\t0\tMHz\n", id );
}
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