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