* Copyright (c) 1989 The Regents of the University of California.
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid
[] = "@(#)sleep.c 5.6 (Berkeley) 2/23/91";
#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
;
static void sleephandler();
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);