59 lines
1.7 KiB
C
59 lines
1.7 KiB
C
/*
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* Copyright (c) 2009-2011, 2013, 2017-2018 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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#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 *ts, struct timespec *rts)
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{
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struct timeval timeout, endtime, now;
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int rval;
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if (ts->tv_sec == 0 && ts->tv_nsec < 1000) {
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timeout.tv_sec = 0;
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timeout.tv_usec = 1;
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} else {
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TIMESPEC_TO_TIMEVAL(&timeout, ts);
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}
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if (rts != NULL) {
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if (gettimeofday(&endtime, NULL) == -1)
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return -1;
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sudo_timevaladd(&endtime, &timeout, &endtime);
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}
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rval = select(0, NULL, NULL, NULL, &timeout);
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if (rts != NULL && rval == -1 && errno == EINTR) {
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if (gettimeofday(&now, NULL) == -1)
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return -1;
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sudo_timevalsub(&endtime, &now, &endtime);
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TIMEVAL_TO_TIMESPEC(&endtime, rts);
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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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