Adding upstream version 1.8.27.upstream/1.8.27upstream

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

1 files changed, 200 insertions, 0 deletions

diff --git a/lib/util/utimens.c b/lib/util/utimens.c
new file mode 100644
index 0000000..579391f
--- /dev/null
+++ b/lib/util/utimens.c
@@ -0,0 +1,200 @@
+/*
+ * Copyright (c) 2015, 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>
+
+#if !defined(HAVE_FUTIMENS) || !defined(HAVE_UTIMENSAT)
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <stdio.h>
+#include <errno.h>
+#include <time.h>
+#if !defined(HAVE_UTIMES) || defined(HAVE_FUTIME)
+# include <utime.h>
+#endif
+
+#include "sudo_compat.h"
+#include "sudo_util.h"
+
+#if !defined(HAVE_FUTIMES) && defined(HAVE_FUTIMESAT)
+# define futimes(_f, _tv)	futimesat(_f, NULL, _tv)
+# define HAVE_FUTIMES
+#endif
+
+#if defined(HAVE_ST_MTIM)
+# ifdef HAVE_ST__TIM
+#  define ATIME_TO_TIMEVAL(_x, _y)	TIMESPEC_TO_TIMEVAL((_x), &(_y)->st_atim.st__tim)
+#  define MTIME_TO_TIMEVAL(_x, _y)	TIMESPEC_TO_TIMEVAL((_x), &(_y)->st_mtim.st__tim)
+# else
+#  define ATIME_TO_TIMEVAL(_x, _y)	TIMESPEC_TO_TIMEVAL((_x), &(_y)->st_atim)
+#  define MTIME_TO_TIMEVAL(_x, _y)	TIMESPEC_TO_TIMEVAL((_x), &(_y)->st_mtim)
+# endif
+#elif defined(HAVE_ST_MTIMESPEC)
+# define ATIME_TO_TIMEVAL(_x, _y)	TIMESPEC_TO_TIMEVAL((_x), &(_y)->st_atimespec)
+# define MTIME_TO_TIMEVAL(_x, _y)	TIMESPEC_TO_TIMEVAL((_x), &(_y)->st_mtimespec)
+#elif defined(HAVE_ST_NMTIME)
+# define ATIME_TO_TIMEVAL(_x, _y)      do { (_x)->tv_sec = (_y)->st_atime; (_x)->tv_usec = (_y)->st_natime; } while (0)
+# define MTIME_TO_TIMEVAL(_x, _y)      do { (_x)->tv_sec = (_y)->st_mtime; (_x)->tv_usec = (_y)->st_nmtime; } while (0)
+#else
+# define ATIME_TO_TIMEVAL(_x, _y)      do { (_x)->tv_sec = (_y)->st_atime; (_x)->tv_usec = 0; } while (0)
+# define MTIME_TO_TIMEVAL(_x, _y)      do { (_x)->tv_sec = (_y)->st_mtime; (_x)->tv_usec = 0; } while (0)
+#endif /* HAVE_ST_MTIM */
+
+/*
+ * Convert the pair of timespec structs passed to futimens() / utimensat()
+ * to a pair of timeval structs, handling UTIME_OMIT and UTIME_NOW.
+ * Returns 0 on success and -1 on failure (setting errno).
+ */
+static int
+utimens_ts_to_tv(int fd, const char *file, const struct timespec *ts,
+    struct timeval *tv)
+{
+    TIMESPEC_TO_TIMEVAL(&tv[0], &ts[0]);
+    TIMESPEC_TO_TIMEVAL(&tv[1], &ts[1]);
+    if (ts[0].tv_nsec == UTIME_OMIT || ts[1].tv_nsec == UTIME_OMIT) {
+	struct stat sb;
+
+	if (fd != -1) {
+	    /* For futimens() */
+	    if (fstat(fd, &sb) == -1)
+		return -1;
+	} else {
+	    /* For utimensat() */
+	    if (stat(file, &sb) == -1)
+		return -1;
+	}
+	if (ts[0].tv_nsec == UTIME_OMIT)
+	    ATIME_TO_TIMEVAL(&tv[0], &sb);
+	if (ts[1].tv_nsec == UTIME_OMIT)
+	    MTIME_TO_TIMEVAL(&tv[1], &sb);
+    }
+    if (ts[0].tv_nsec == UTIME_NOW || ts[1].tv_nsec == UTIME_NOW) {
+	struct timeval now;
+
+	if (gettimeofday(&now, NULL) == -1)
+	    return -1;
+	if (ts[0].tv_nsec == UTIME_NOW)
+	    tv[0] = now;
+	if (ts[1].tv_nsec == UTIME_NOW)
+	    tv[1] = now;
+    }
+    return 0;
+}
+
+#if defined(HAVE_FUTIMES)
+/*
+ * Emulate futimens() via futimes()
+ */
+int
+sudo_futimens(int fd, const struct timespec *ts)
+{
+    struct timeval tv[2], *times = NULL;
+
+    if (ts != NULL) {
+	if (utimens_ts_to_tv(fd, NULL, ts, tv) == -1)
+	    return -1;
+	times = tv;
+    }
+    return futimes(fd, times);
+}
+#elif defined(HAVE_FUTIME)
+/*
+ * Emulate futimens() via futime()
+ */
+int
+sudo_futimens(int fd, const struct timespec *ts)
+{
+    struct utimbuf utb, *times = NULL;
+
+    if (ts != NULL) {
+	struct timeval tv[2];
+
+	if (utimens_ts_to_tv(fd, NULL, ts, tv) == -1)
+	    return -1;
+	utb.actime = (time_t)(tv[0].tv_sec + tv[0].tv_usec / 1000000);
+	utb.modtime = (time_t)(tv[1].tv_sec + tv[1].tv_usec / 1000000);
+	times = &utb;
+    }
+    return futime(fd, times);
+}
+#else
+/*
+ * Nothing to do but fail.
+ */
+int
+sudo_futimens(int fd, const struct timespec *ts)
+{
+    errno = ENOSYS;
+    return -1;
+}
+#endif /* HAVE_FUTIMES */
+
+#if defined(HAVE_UTIMES)
+/*
+ * Emulate utimensat() via utimes()
+ */
+int
+sudo_utimensat(int fd, const char *file, const struct timespec *ts, int flag)
+{
+    struct timeval tv[2], *times = NULL;
+
+    if (fd != AT_FDCWD || flag != 0) {
+	errno = ENOTSUP;
+	return -1;
+    }
+
+    if (ts != NULL) {
+	if (utimens_ts_to_tv(-1, file, ts, tv) == -1)
+	    return -1;
+	times = tv;
+    }
+    return utimes(file, times);
+}
+#else
+/*
+ * Emulate utimensat() via utime()
+ */
+int
+sudo_utimensat(int fd, const char *file, const struct timespec *ts, int flag)
+{
+    struct utimbuf utb, *times = NULL;
+
+    if (fd != AT_FDCWD || flag != 0) {
+	errno = ENOTSUP;
+	return -1;
+    }
+
+    if (ts != NULL) {
+	struct timeval tv[2];
+
+	if (utimens_ts_to_tv(-1, file, ts, tv) == -1)
+	    return -1;
+	utb.actime = (time_t)(tv[0].tv_sec + tv[0].tv_usec / 1000000);
+	utb.modtime = (time_t)(tv[1].tv_sec + tv[1].tv_usec / 1000000);
+	times = &utb;
+    }
+    return utime(file, times);
+}
+#endif /* !HAVE_UTIMES */
+
+#endif /* !HAVE_FUTIMENS && !HAVE_UTIMENSAT */