/* $Id: osdep.c,v 1.1 2002/03/07 15:13:48 in2 Exp $ */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>

#if defined(linux)
int cpuload(char *str) {
    double l[3] = {-1, -1, -1};
    FILE *fp;
    
    if((fp = fopen("/proc/loadavg", "r"))) {
	if(fscanf(fp, "%lf %lf %lf",  &l[0], &l[1], &l[2]) != 3)
	    l[0] = -1;
	fclose(fp);
    }
    if(str) {
	if(l[0] != -1)
	    sprintf(str, " %.2f %.2f %.2f", l[0], l[1], l[2]);
	else
	    strcpy(str, " (unknown) ");
    }
    return (int)l[0];
}

double swapused(long *total, long *used) {
    double percent = -1;
    char buf[101];
    FILE *fp;
	
    if((fp = fopen("/proc/meminfo","r"))) {
	while(fgets(buf, 100, fp) && buf[0] != 'S');
	if(sscanf(buf + 6, "%ld %ld", total, used) == 2)
	    if(*total != 0)
		percent = (double)*used / (double)*total;
	fclose(fp);
    }
    return percent;
}

#elif __FreeBSD__ >=4 

#include <kvm.h>

int cpuload(char *str) {
    double l[3] = {-1, -1, -1};
    if(getloadavg(l, 3) != 3)
	l[0] = -1;
    
    if(str) {
	if(l[0] != -1)
	    sprintf(str, " %.2f %.2f %.2f", l[0], l[1], l[2]);
	else
	    strcpy(str, " (unknown) ");
    }
    return (int)l[0];
}

double swapused(long *total, long *used) {
    double percent = -1;
    kvm_t *kd;
    struct kvm_swap swapinfo;
    int pagesize;
	
    kd = kvm_open(NULL, NULL, NULL, O_RDONLY, NULL);
    if(kd) {
	if(kvm_getswapinfo(kd, &swapinfo, 1, 0) == 0) {
	    pagesize = getpagesize();
	    *total = swapinfo.ksw_total * pagesize;
	    *used = swapinfo.ksw_used * pagesize;
	    if(*total != 0)
		percent = (double)*used / (double)*total;
	}
	kvm_close(kd);
    }
    return percent;
}
#endif