* Copyright (c) 1980 Regents of the University of California.
* All rights reserved. The Berkeley software License Agreement
* specifies the terms and conditions for redistribution.
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid
[] = "@(#)sleep.c 5.3 (Berkeley) %G%";
#endif LIBC_SCCS and not lint
vec.sv_handler = a; vec.sv_mask = vec.sv_onstack = 0
struct itimerval itv
, oitv
;
register struct itimerval
*itp
= &itv
;
timerclear(&itp
->it_interval
);
timerclear(&itp
->it_value
);
if (setitimer(ITIMER_REAL
, itp
, &oitv
) < 0)
itp
->it_value
.tv_sec
= n
;
if (timerisset(&oitv
.it_value
)) {
if (timercmp(&oitv
.it_value
, &itp
->it_value
, >))
oitv
.it_value
.tv_sec
-= itp
->it_value
.tv_sec
;
itp
->it_value
= oitv
.it_value
;
* This is a hack, but we must have time to
* return from the setitimer after the alarm
* or else it'll be restarted. And, anyway,
* sleep never did anything more than this before.
oitv
.it_value
.tv_sec
= 1;
oitv
.it_value
.tv_usec
= 0;
(void) sigvec(SIGALRM
, &vec
, &ovec
);
omask
= sigblock(sigmask(SIGALRM
));
(void) setitimer(ITIMER_REAL
, itp
, (struct itimerval
*)0);
sigpause(omask
&~ sigmask(SIGALRM
));
(void) sigvec(SIGALRM
, &ovec
, (struct sigvec
*)0);
(void) sigsetmask(omask
);
(void) setitimer(ITIMER_REAL
, &oitv
, (struct itimerval
*)0);