Adding upstream version 1.8.27.upstream/1.8.27upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 227 insertions, 0 deletions

diff --git a/lib/util/gettime.c b/lib/util/gettime.c
new file mode 100644
index 0000000..f4d4664
--- /dev/null
+++ b/lib/util/gettime.c
@@ -0,0 +1,227 @@
+/*
+ * Copyright (c) 2014-2018 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>
+
+#include <sys/types.h>
+#include <sys/time.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <time.h>
+#include <errno.h>
+
+#if defined(__MACH__) && !defined(HAVE_CLOCK_GETTIME)
+# include <mach/mach.h>
+# include <mach/mach_time.h>
+# include <mach/clock.h>
+#endif
+
+#include "sudo_compat.h"
+#include "sudo_debug.h"
+#include "sudo_util.h"
+
+/*
+ * On Linux and FreeBSD, CLOCK_MONOTONIC does not run while sleeping.
+ * Linux provides CLOCK_BOOTTIME which runs while sleeping (FreeBSD does not).
+ * Some systems provide CLOCK_UPTIME which only runs while awake.
+ */
+#if defined(CLOCK_BOOTTIME)
+# define SUDO_CLOCK_BOOTTIME	CLOCK_BOOTTIME
+#elif defined(CLOCK_MONOTONIC_RAW)
+# define SUDO_CLOCK_BOOTTIME	CLOCK_MONOTONIC_RAW
+#elif defined(CLOCK_MONOTONIC)
+# define SUDO_CLOCK_BOOTTIME	CLOCK_MONOTONIC
+#endif
+#if defined(CLOCK_UPTIME_RAW)
+# define SUDO_CLOCK_UPTIME	CLOCK_UPTIME_RAW
+#elif defined(CLOCK_UPTIME)
+# define SUDO_CLOCK_UPTIME	CLOCK_UPTIME
+#elif defined(CLOCK_MONOTONIC)
+# define SUDO_CLOCK_UPTIME	CLOCK_MONOTONIC
+#endif
+
+/*
+ * Wall clock time, may run backward.
+ */
+#if defined(HAVE_CLOCK_GETTIME)
+int
+sudo_gettime_real_v1(struct timespec *ts)
+{
+    debug_decl(sudo_gettime_real, SUDO_DEBUG_UTIL)
+
+    if (clock_gettime(CLOCK_REALTIME, ts) == -1) {
+	struct timeval tv;
+
+	sudo_debug_printf(SUDO_DEBUG_WARN|SUDO_DEBUG_ERRNO|SUDO_DEBUG_LINENO,
+	    "clock_gettime(CLOCK_REALTIME) failed, trying gettimeofday()");
+	if (gettimeofday(&tv, NULL) == -1)
+	    debug_return_int(-1);
+	TIMEVAL_TO_TIMESPEC(&tv, ts);
+    }
+    debug_return_int(0);
+}
+#else
+int
+sudo_gettime_real_v1(struct timespec *ts)
+{
+    struct timeval tv;
+    debug_decl(sudo_gettime_real, SUDO_DEBUG_UTIL)
+
+    if (gettimeofday(&tv, NULL) == -1)
+	debug_return_int(-1);
+    TIMEVAL_TO_TIMESPEC(&tv, ts);
+    debug_return_int(0);
+}
+#endif
+
+/*
+ * Monotonic time, only runs forward.
+ * We use a timer that only increments while sleeping, if possible.
+ */
+#if defined(HAVE_CLOCK_GETTIME) && defined(SUDO_CLOCK_BOOTTIME)
+int
+sudo_gettime_mono_v1(struct timespec *ts)
+{
+    static int has_monoclock = -1;
+    debug_decl(sudo_gettime_mono, SUDO_DEBUG_UTIL)
+
+    /* Check whether the kernel/libc actually supports a monotonic clock. */
+# ifdef _SC_MONOTONIC_CLOCK
+    if (has_monoclock == -1)
+	has_monoclock = sysconf(_SC_MONOTONIC_CLOCK) != -1;
+# endif
+    if (!has_monoclock)
+	debug_return_int(sudo_gettime_real(ts));
+    if (clock_gettime(SUDO_CLOCK_BOOTTIME, ts) == -1) {
+	sudo_debug_printf(SUDO_DEBUG_WARN|SUDO_DEBUG_ERRNO|SUDO_DEBUG_LINENO,
+	    "clock_gettime(%d) failed, using wall clock",
+	    (int)SUDO_CLOCK_BOOTTIME);
+	has_monoclock = 0;
+	debug_return_int(sudo_gettime_real(ts));
+    }
+    debug_return_int(0);
+}
+#elif defined(HAVE_GETHRTIME)
+int
+sudo_gettime_mono_v1(struct timespec *ts)
+{
+    hrtime_t nsec;
+    debug_decl(sudo_gettime_mono, SUDO_DEBUG_UTIL)
+
+    nsec = gethrtime();
+    ts->tv_sec = nsec / 1000000000;
+    ts->tv_nsec = nsec % 1000000000;
+    debug_return_int(0);
+}
+#elif defined(__MACH__)
+int
+sudo_gettime_mono_v1(struct timespec *ts)
+{
+    uint64_t abstime, nsec;
+    static mach_timebase_info_data_t timebase_info;
+    debug_decl(sudo_gettime_mono, SUDO_DEBUG_UTIL)
+
+    if (timebase_info.denom == 0)
+	(void) mach_timebase_info(&timebase_info);
+#ifdef HAVE_MACH_CONTINUOUS_TIME
+    abstime = mach_continuous_time();		/* runs while asleep */
+#else
+    abstime = mach_absolute_time();		/* doesn't run while asleep */
+#endif
+    nsec = abstime * timebase_info.numer / timebase_info.denom;
+    ts->tv_sec = nsec / 1000000000;
+    ts->tv_nsec = nsec % 1000000000;
+    debug_return_int(0);
+}
+#else
+int
+sudo_gettime_mono_v1(struct timespec *ts)
+{
+    /* No monotonic clock available, use wall clock. */
+    return sudo_gettime_real(ts);
+}
+#endif
+
+/*
+ * Monotonic time, only runs forward.
+ * We use a timer that only increments while awake, if possible.
+ */
+#if defined(HAVE_CLOCK_GETTIME) && defined(SUDO_CLOCK_UPTIME)
+int
+sudo_gettime_awake_v1(struct timespec *ts)
+{
+    static int has_monoclock = -1;
+    debug_decl(sudo_gettime_awake, SUDO_DEBUG_UTIL)
+
+    /* Check whether the kernel/libc actually supports a monotonic clock. */
+# ifdef _SC_MONOTONIC_CLOCK
+    if (has_monoclock == -1)
+	has_monoclock = sysconf(_SC_MONOTONIC_CLOCK) != -1;
+# endif
+    if (!has_monoclock)
+	debug_return_int(sudo_gettime_real(ts));
+    if (clock_gettime(SUDO_CLOCK_UPTIME, ts) == -1) {
+	sudo_debug_printf(SUDO_DEBUG_WARN|SUDO_DEBUG_ERRNO|SUDO_DEBUG_LINENO,
+	    "clock_gettime(%d) failed, using wall clock",
+	    (int)SUDO_CLOCK_UPTIME);
+	has_monoclock = 0;
+	debug_return_int(sudo_gettime_real(ts));
+    }
+    debug_return_int(0);
+}
+#elif defined(HAVE_GETHRTIME)
+int
+sudo_gettime_awake_v1(struct timespec *ts)
+{
+    hrtime_t nsec;
+    debug_decl(sudo_gettime_awake, SUDO_DEBUG_UTIL)
+
+    /* Currently the same as sudo_gettime_mono() */
+    nsec = gethrtime();
+    ts->tv_sec = nsec / 1000000000;
+    ts->tv_nsec = nsec % 1000000000;
+    debug_return_int(0);
+}
+#elif defined(__MACH__)
+int
+sudo_gettime_awake_v1(struct timespec *ts)
+{
+    uint64_t abstime, nsec;
+    static mach_timebase_info_data_t timebase_info;
+    debug_decl(sudo_gettime_awake, SUDO_DEBUG_UTIL)
+
+    if (timebase_info.denom == 0)
+	(void) mach_timebase_info(&timebase_info);
+    abstime = mach_absolute_time();
+    nsec = abstime * timebase_info.numer / timebase_info.denom;
+    ts->tv_sec = nsec / 1000000000;
+    ts->tv_nsec = nsec % 1000000000;
+    debug_return_int(0);
+}
+#else
+int
+sudo_gettime_awake_v1(struct timespec *ts)
+{
+    /* No monotonic uptime clock available, use wall clock. */
+    return sudo_gettime_real(ts);
+}
+#endif