158 lines
4.6 KiB
C
158 lines
4.6 KiB
C
/* This file takes care of those system calls that deal with time.
|
|
*
|
|
* The entry points into this file are
|
|
* do_getres: perform the CLOCK_GETRES system call
|
|
* do_gettime: perform the CLOCK_GETTIME system call
|
|
* do_settime: perform the CLOCK_SETTIME system call
|
|
* do_time: perform the TIME system call
|
|
* do_stime: perform the STIME system call
|
|
* do_times: perform the TIMES system call
|
|
*/
|
|
|
|
#include "pm.h"
|
|
#include <minix/callnr.h>
|
|
#include <minix/com.h>
|
|
#include <signal.h>
|
|
#include <sys/time.h>
|
|
#include "mproc.h"
|
|
#include "param.h"
|
|
|
|
/*===========================================================================*
|
|
* do_gettime *
|
|
*===========================================================================*/
|
|
int do_gettime()
|
|
{
|
|
clock_t ticks, realtime, clock;
|
|
time_t boottime;
|
|
int s;
|
|
|
|
if ( (s=getuptime(&ticks, &realtime, &boottime)) != OK)
|
|
panic("do_time couldn't get uptime: %d", s);
|
|
|
|
switch (m_in.clk_id) {
|
|
case CLOCK_REALTIME:
|
|
clock = realtime;
|
|
break;
|
|
case CLOCK_MONOTONIC:
|
|
clock = ticks;
|
|
break;
|
|
default:
|
|
return EINVAL; /* invalid/unsupported clock_id */
|
|
}
|
|
|
|
mp->mp_reply.reply_time = (time_t) (boottime + (clock / system_hz));
|
|
mp->mp_reply.reply_ntime =
|
|
(long) ((clock % system_hz) * 1000000000ULL / system_hz);
|
|
|
|
return(OK);
|
|
}
|
|
|
|
/*===========================================================================*
|
|
* do_getres *
|
|
*===========================================================================*/
|
|
int do_getres()
|
|
{
|
|
switch (m_in.clk_id) {
|
|
case CLOCK_REALTIME:
|
|
case CLOCK_MONOTONIC:
|
|
/* tv_sec is always 0 since system_hz is an int */
|
|
mp->mp_reply.reply_time = (time_t) 0;
|
|
mp->mp_reply.reply_ntime = 1000000000 / system_hz;
|
|
return(OK);
|
|
default:
|
|
return EINVAL; /* invalid/unsupported clock_id */
|
|
}
|
|
}
|
|
|
|
/*===========================================================================*
|
|
* do_settime *
|
|
*===========================================================================*/
|
|
int do_settime()
|
|
{
|
|
int s;
|
|
|
|
if (mp->mp_effuid != SUPER_USER) {
|
|
return(EPERM);
|
|
}
|
|
|
|
switch (m_in.clk_id) {
|
|
case CLOCK_REALTIME:
|
|
s= sys_settime(m_in.settime_now, m_in.clk_id, m_in.time_sec,
|
|
m_in.time_nsec);
|
|
return(s);
|
|
case CLOCK_MONOTONIC: /* monotonic cannot be changed */
|
|
default:
|
|
return EINVAL; /* invalid/unsupported clock_id */
|
|
}
|
|
}
|
|
|
|
/*===========================================================================*
|
|
* do_time *
|
|
*===========================================================================*/
|
|
int do_time()
|
|
{
|
|
/* Perform the time(tp) system call. This returns the time in seconds since
|
|
* 1.1.1970. MINIX is an astrophysically naive system that assumes the earth
|
|
* rotates at a constant rate and that such things as leap seconds do not
|
|
* exist.
|
|
*/
|
|
clock_t ticks, realtime;
|
|
time_t boottime;
|
|
int s;
|
|
|
|
if ( (s=getuptime(&ticks, &realtime, &boottime)) != OK)
|
|
panic("do_time couldn't get uptime: %d", s);
|
|
|
|
mp->mp_reply.reply_time = (time_t) (boottime + (realtime / system_hz));
|
|
mp->mp_reply.reply_utime =
|
|
(long) ((realtime % system_hz) * 1000000ULL / system_hz);
|
|
return(OK);
|
|
}
|
|
|
|
/*===========================================================================*
|
|
* do_stime *
|
|
*===========================================================================*/
|
|
int do_stime()
|
|
{
|
|
/* Perform the stime(tp) system call. Retrieve the system's uptime (ticks
|
|
* since boot) and pass the new time in seconds at system boot to the kernel.
|
|
*/
|
|
clock_t uptime, realtime;
|
|
time_t boottime;
|
|
int s;
|
|
|
|
if (mp->mp_effuid != SUPER_USER) {
|
|
return(EPERM);
|
|
}
|
|
if ( (s=getuptime(&uptime, &realtime, &boottime)) != OK)
|
|
panic("do_stime couldn't get uptime: %d", s);
|
|
boottime = (long) m_in.stime - (realtime/system_hz);
|
|
|
|
s= sys_stime(boottime); /* Tell kernel about boottime */
|
|
if (s != OK)
|
|
panic("pm: sys_stime failed: %d", s);
|
|
|
|
return(OK);
|
|
}
|
|
|
|
/*===========================================================================*
|
|
* do_times *
|
|
*===========================================================================*/
|
|
int do_times()
|
|
{
|
|
/* Perform the times(buffer) system call. */
|
|
register struct mproc *rmp = mp;
|
|
clock_t user_time, sys_time, uptime;
|
|
int s;
|
|
|
|
if (OK != (s=sys_times(who_e, &user_time, &sys_time, &uptime, NULL)))
|
|
panic("do_times couldn't get times: %d", s);
|
|
rmp->mp_reply.reply_t1 = user_time; /* user time */
|
|
rmp->mp_reply.reply_t2 = sys_time; /* system time */
|
|
rmp->mp_reply.reply_t3 = rmp->mp_child_utime; /* child user time */
|
|
rmp->mp_reply.reply_t4 = rmp->mp_child_stime; /* child system time */
|
|
rmp->mp_reply.reply_t5 = uptime; /* uptime since boot */
|
|
|
|
return(OK);
|
|
}
|
|
|