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/*
KSysGuard, the KDE System Guard
Copyright (c) 1999 Chris Schlaeger <cs@kde.org>
Copyright (c) 1999-2000 Hans Petter Bieker <bieker@kde.org>
This program 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 of the License, or
(at your option) any later version.
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/param.h>
#include <sys/sysctl.h>
#include <sys/dkstat.h>
#include <sys/swap.h>
#include <limits.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "Command.h"
#include "memory.h"
#include "ksysguardd.h"
static size_t Total = 0;
static size_t MFree = 0;
static size_t Active = 0;
static size_t InActive = 0;
static size_t STotal = 0;
static size_t SFree = 0;
static size_t SUsed = 0;
static int pageshift = 0;
/* define pagetok in terms of pageshift */
#define pagetok(size) ((size) << pageshift)
void swapmode(int *used, int *total);
void
initMemory(struct SensorModul* sm)
{
int pagesize;
static int physmem_mib[] = { CTL_HW, HW_PHYSMEM };
size_t size;
/* get the page size with "getpagesize" and calculate pageshift from
* it */
pagesize = getpagesize();
pageshift = 0;
while (pagesize > 1) {
pageshift++;
pagesize >>= 1;
}
size = sizeof(Total);
sysctl(physmem_mib, 2, &Total, &size, NULL, 0);
Total /= 1024;
swapmode(&SUsed, &STotal);
registerMonitor("mem/physical/free", "integer", printMFree, printMFreeInfo, sm);
registerMonitor("mem/physical/active", "integer", printActive, printActiveInfo, sm);
registerMonitor("mem/physical/inactive", "integer", printInActive, printInActiveInfo, sm);
registerMonitor("mem/swap/free", "integer", printSwapFree, printSwapFreeInfo, sm);
registerMonitor("mem/swap/used", "integer", printSwapUsed, printSwapUsedInfo, sm);
}
void
exitMemory(void)
{
}
int
updateMemory(void)
{
static int vmtotal_mib[] = {CTL_VM, VM_METER};
size_t size;
struct vmtotal vmtotal;
size = sizeof(vmtotal);
if (sysctl(vmtotal_mib, 2, &vmtotal, &size, NULL, 0) < 0)
return -1;
MFree = pagetok(vmtotal.t_free);
MFree /= 1024;
Active = pagetok(vmtotal.t_arm);
Active /= 1024;
InActive = pagetok(vmtotal.t_rm);
InActive /= 1024;
InActive -= Active;
swapmode(&SUsed, &STotal);
SFree = STotal - SUsed;
return 0;
}
void
printMFree(const char* cmd)
{
fprintf(CurrentClient, "%d\n", MFree);
}
void
printMFreeInfo(const char* cmd)
{
fprintf(CurrentClient, "Free Memory\t0\t%d\tKB\n", Total);
}
void
printActive(const char* cmd)
{
fprintf(CurrentClient, "%d\n", Active);
}
void
printActiveInfo(const char* cmd)
{
fprintf(CurrentClient, "Active Memory\t0\t%d\tKB\n", Total);
}
void
printInActive(const char* cmd)
{
fprintf(CurrentClient, "%d\n", InActive);
}
void
printInActiveInfo(const char* cmd)
{
fprintf(CurrentClient, "InActive Memory\t0\t%d\tKB\n", Total);
}
void
printSwapUsed(const char* cmd)
{
fprintf(CurrentClient, "%d\n", SUsed);
}
void
printSwapUsedInfo(const char* cmd)
{
fprintf(CurrentClient, "Used Swap Memory\t0\t%d\tKB\n", STotal);
}
void
printSwapFree(const char* cmd)
{
fprintf(CurrentClient, "%d\n", SFree);
}
void
printSwapFreeInfo(const char* cmd)
{
fprintf(CurrentClient, "Free Swap Memory\t0\t%d\tKB\n", STotal);
}
/*
This function swapmode was originally written by Tobias
Weingartner <weingart@openbsd.org>
Taken from OpenBSD top command
*/
void
swapmode (int *used, int *total)
{
int nswap, rnswap, i;
struct swapent *swdev;
*total = *used = 0;
/* Number of swap devices */
nswap = swapctl(SWAP_NSWAP, 0, 0);
if (nswap == 0)
return;
swdev = (struct swapent *) malloc(nswap * sizeof(*swdev));
if (swdev == NULL)
return;
rnswap = swapctl(SWAP_STATS, swdev, nswap);
if (rnswap == -1) {
free(swdev);
return;
}
/* if rnswap != nswap, then what? */
/* Total things up */
for (i = 0; i < nswap; i++) {
if (swdev[i].se_flags & SWF_ENABLE) {
*used += (swdev[i].se_inuse / (1024 / DEV_BSIZE));
*total += (swdev[i].se_nblks / (1024 / DEV_BSIZE));
}
}
free(swdev);
}
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