* Copyright (c) 1989 The Regents of the University of California.
* Redistribution and use in source and binary forms are permitted
* provided that the above copyright notice and this paragraph are
* duplicated in all such forms and that any documentation,
* advertising materials, and other materials related to such
* distribution and use acknowledge that the software was developed
* by the University of California, Berkeley. The name of the
* University may not be used to endorse or promote products derived
* from this software without specific prior written permission.
* THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
* IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
* WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid
[] = "@(#)sleep.c 5.4 (Berkeley) %G%";
#endif /* LIBC_SCCS and not lint */
vec.sv_handler = a; vec.sv_mask = vec.sv_onstack = 0
register struct itimerval
*itp
;
struct itimerval itv
, oitv
;
timerclear(&itp
->it_interval
);
timerclear(&itp
->it_value
);
if (setitimer(ITIMER_REAL
, itp
, &oitv
) < 0)
itp
->it_value
.tv_sec
= seconds
;
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;
setvec(vec
, sleephandler
);
(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);