124 lines
3.5 KiB
C
124 lines
3.5 KiB
C
/*
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* Copyright (c) 2014-2015 Todd C. Miller <Todd.Miller@courtesan.com>
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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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#include <sys/types.h>
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#include <sys/time.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <unistd.h>
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#ifdef TIME_WITH_SYS_TIME
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# include <time.h>
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#endif
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#include <errno.h>
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#if defined(__MACH__) && !defined(HAVE_CLOCK_GETTIME)
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# include <mach/mach.h>
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# include <mach/mach_time.h>
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# include <mach/clock.h>
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#endif
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#include "sudo_compat.h"
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#include "sudo_debug.h"
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#include "sudo_util.h"
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/* On Linux, CLOCK_MONOTONIC does not run while suspended. */
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#if defined(CLOCK_BOOTTIME)
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# define SUDO_CLOCK_MONOTONIC CLOCK_BOOTTIME
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#elif defined(CLOCK_MONOTONIC)
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# define SUDO_CLOCK_MONOTONIC CLOCK_MONOTONIC
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#endif
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#if defined(HAVE_CLOCK_GETTIME)
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int
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sudo_gettime_real_v1(struct timespec *ts)
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{
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debug_decl(sudo_gettime_real, SUDO_DEBUG_UTIL)
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if (clock_gettime(CLOCK_REALTIME, ts) == -1) {
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struct timeval tv;
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sudo_debug_printf(SUDO_DEBUG_WARN|SUDO_DEBUG_ERRNO|SUDO_DEBUG_LINENO,
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"clock_gettime(CLOCK_REALTIME) failed, trying gettimeofday()");
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if (gettimeofday(&tv, NULL) == -1)
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debug_return_int(-1);
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TIMEVAL_TO_TIMESPEC(&tv, ts);
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}
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debug_return_int(0);
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}
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#else
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int
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sudo_gettime_real_v1(struct timespec *ts)
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{
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struct timeval tv;
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debug_decl(sudo_gettime_real, SUDO_DEBUG_UTIL)
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if (gettimeofday(&tv, NULL) == -1)
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debug_return_int(-1);
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TIMEVAL_TO_TIMESPEC(&tv, ts);
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debug_return_int(0);
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}
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#endif
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#if defined(HAVE_CLOCK_GETTIME) && defined(SUDO_CLOCK_MONOTONIC)
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int
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sudo_gettime_mono_v1(struct timespec *ts)
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{
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static int has_monoclock = -1;
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debug_decl(sudo_gettime_mono, SUDO_DEBUG_UTIL)
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/* Check whether the kernel/libc actually supports CLOCK_MONOTONIC. */
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# ifdef _SC_MONOTONIC_CLOCK
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if (has_monoclock == -1)
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has_monoclock = sysconf(_SC_MONOTONIC_CLOCK) != -1;
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# endif
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if (!has_monoclock)
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debug_return_int(sudo_gettime_real(ts));
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if (clock_gettime(SUDO_CLOCK_MONOTONIC, ts) == -1) {
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sudo_debug_printf(SUDO_DEBUG_WARN|SUDO_DEBUG_ERRNO|SUDO_DEBUG_LINENO,
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"clock_gettime(%d) failed, using wall clock",
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(int)SUDO_CLOCK_MONOTONIC);
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has_monoclock = 0;
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debug_return_int(sudo_gettime_real(ts));
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}
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debug_return_int(0);
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}
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#elif defined(__MACH__)
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int
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sudo_gettime_mono_v1(struct timespec *ts)
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{
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uint64_t abstime, nsec;
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static mach_timebase_info_data_t timebase_info;
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debug_decl(sudo_gettime_mono, SUDO_DEBUG_UTIL)
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if (timebase_info.denom == 0)
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(void) mach_timebase_info(&timebase_info);
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abstime = mach_absolute_time();
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nsec = abstime * timebase_info.numer / timebase_info.denom;
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ts->tv_sec = nsec / 1000000000;
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ts->tv_nsec = nsec % 1000000000;
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debug_return_int(0);
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}
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#else
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int
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sudo_gettime_mono_v1(struct timespec *ts)
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{
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/* No monotonic clock available, use wall clock. */
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return sudo_gettime_real(ts);
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}
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#endif
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