usr/src/sys/kern/kern_time.c

/*      kern_time.c     5.1     82/07/15        */

#include "../h/param.h"
#include "../h/systm.h"
#include "../h/dir.h"
#include "../h/user.h"
#include "../h/reg.h"
#include "../h/inode.h"
#include "../h/proc.h"
#include "../h/clock.h"
#include "../h/mtpr.h"
#include "../h/timeb.h"
#include "../h/times.h"
#include "../h/reboot.h"
#include "../h/fs.h"
#include "../h/conf.h"
#include "../h/buf.h"
#include "../h/mount.h"

/*
 * return the current time (old-style entry)
 */
gtime()
{
        u.u_r.r_time = time;
        if (clkwrap())
                clkset();
}

/*
 * New time entry-- return TOD with milliseconds, timezone,
 * DST flag
 */
ftime()
{
        register struct a {
                struct  timeb   *tp;
        } *uap;
        struct timeb t;
        register unsigned ms;

        uap = (struct a *)u.u_ap;
        (void) spl7();
        t.time = time;
        ms = lbolt;
        (void) spl0();
        if (ms > hz) {
                ms -= hz;
                t.time++;
        }
        t.millitm = (1000*ms)/hz;
        t.timezone = timezone;
        t.dstflag = dstflag;
        if (copyout((caddr_t)&t, (caddr_t)uap->tp, sizeof(t)) < 0)
                u.u_error = EFAULT;
        if (clkwrap())
                clkset();
}

/*
 * Set the time
 */
stime()
{
        register struct a {
                time_t  time;
        } *uap;

        uap = (struct a *)u.u_ap;
        if (suser()) {
                bootime += uap->time - time;
                time = uap->time;
                clkset();
        }
}

times()
{
        register struct a {
                time_t  (*times)[4];
        } *uap;
        struct tms tms;

        tms.tms_utime = u.u_vm.vm_utime;
        tms.tms_stime = u.u_vm.vm_stime;
        tms.tms_cutime = u.u_cvm.vm_utime;
        tms.tms_cstime = u.u_cvm.vm_stime;
        uap = (struct a *)u.u_ap;
        if (copyout((caddr_t)&tms, (caddr_t)uap->times, sizeof(struct tms)) < 0)
                u.u_error = EFAULT;
}