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/*
* lbcd kernel code for Mac OS X (Darwin).
*
* It uses the sysctl function to get the required information from the
* kernel. Works on Darwin 8.10.1 Mac OS X 10.4.10. I make no guarantee or
* warranty that it works with anything else.
*
* Written on 2007-11-15 by Clif Redding, Computer Science Dept.,
* University of West Florida
* Updates by Russ Allbery <eagle@eyrie.org>
* Copyright 2007 Clif Redding
* Copyright 2009, 2012, 2013
* The Board of Trustees of the Leland Stanford Junior University
*
* See LICENSE for licensing terms.
*/
#include <config.h>
#include <portable/system.h>
#include <fcntl.h>
#include <sys/param.h>
#include <sys/sysctl.h>
#include <sys/times.h>
#include <server/internal.h>
#include <util/messages.h>
/*
* Get the current load average from the kernel and return the one minute,
* five minute, and fifteen minute averages in the given parameters. Returns
* 0 on success and -1 on failure.
*/
int
kernel_getload(double *l1, double *l5, double *l15)
{
int mib[2];
struct loadavg dyn_info;
size_t size;
mib[0] = CTL_VM;
mib[1] = VM_LOADAVG;
size = sizeof(dyn_info);
if (sysctl(mib, 2, &dyn_info, &size, NULL, 0) < 0) {
syswarn("error reading kernel load average");
return -1;
}
*l1 = (double) dyn_info.ldavg[0] / FSCALE;
*l5 = (double) dyn_info.ldavg[1] / FSCALE;
*l15 = (double) dyn_info.ldavg[2] / FSCALE;
return 0;
}
/*
* Get the system uptime and return it in the boottime parameter. Returns 0
* on success and -1 on failure.
*/
int
kernel_getboottime(time_t *boottime)
{
int mib[2];
struct timeval boot;
size_t size;
mib[0] = CTL_KERN;
mib[1] = KERN_BOOTTIME;
size = sizeof(boot);
if (sysctl(mib, 2, &boot, &size, NULL, 0) < 0) {
syswarn("error reding kernel boot time");
return -1;
}
*boottime = boot.tv_sec;
return 0;
}
/*
* Test routine.
*/
#ifdef MAIN
int
main(void)
{
double l1, l5, l15;
time_t boottime;
if (kernel_getload(&l1,&l5,&l15) == 0)
printf("load %.02f %.02f %.02f\n", l1, l5, l15);
if (kernel_getboottime(&boottime) == 0)
printf("booted at %s", ctime(&boottime));
return 0;
}
#endif
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