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/*
* SPDX-License-Identifier: ISC
*
* Copyright (c) 2009-2011, 2013, 2017-2018, 2023
* Todd C. Miller <Todd.Miller@sudo.ws>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/*
* This is an open source non-commercial project. Dear PVS-Studio, please check it.
* PVS-Studio Static Code Analyzer for C, C++ and C#: http://www.viva64.com
*/
#include <config.h>
#ifndef HAVE_NANOSLEEP
#include <sys/types.h>
#include <sys/time.h>
#ifdef HAVE_SYS_SELECT_H
#include <sys/select.h>
#endif /* HAVE_SYS_SELECT_H */
#include <time.h>
#include <errno.h>
#include <sudo_compat.h>
#include <sudo_util.h>
int
sudo_nanosleep(const struct timespec *timeout, struct timespec *remainder)
{
struct timespec endtime, now;
struct timeval tv;
int rval;
if (timeout->tv_sec == 0 && timeout->tv_nsec < 1000) {
tv.tv_sec = 0;
tv.tv_usec = 1;
} else {
TIMESPEC_TO_TIMEVAL(&tv, timeout);
}
if (remainder != NULL) {
if (sudo_gettime_real(&endtime) == -1)
return -1;
sudo_timespecadd(&endtime, timeout, &endtime);
}
rval = select(0, NULL, NULL, NULL, &tv);
if (remainder != NULL) {
if (rval == 0) {
/* Timeout expired, no remaining time. */
sudo_timespecclear(remainder);
} else if (errno == EINTR) {
/* Interrupted, compute remaining time. */
if (sudo_gettime_real(&now) == -1)
return -1;
sudo_timespecsub(&endtime, &now, remainder);
if (remainder->tv_sec < 0 || remainder->tv_nsec < 0)
sudo_timespecclear(remainder);
}
}
return rval;
}
#endif /* HAVE_NANOSLEEP */
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