+/* Test of file timestamp modification functions.
+ Copyright (C) 2009 Free Software Foundation, Inc.
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+/* This file assumes that BASE and ASSERT are already defined. */
+
+#ifndef GL_TEST_UTIMENS
+# define GL_TEST_UTIMENS
+
+#include <fcntl.h>
+#include <errno.h>
+#include <string.h>
+#include <unistd.h>
+
+#include "stat-time.h"
+#include "timespec.h"
+#include "utimecmp.h"
+
+enum {
+ BILLION = 1000 * 1000 * 1000,
+
+ Y2K = 946684800, /* Jan 1, 2000, in seconds since epoch. */
+
+ /* Bogus positive and negative tv_nsec values closest to valid
+ range, but without colliding with UTIME_NOW or UTIME_OMIT. */
+ UTIME_BOGUS_POS = BILLION + ((UTIME_NOW == BILLION || UTIME_OMIT == BILLION)
+ ? (1 + (UTIME_NOW == BILLION + 1)
+ + (UTIME_OMIT == BILLION + 1))
+ : 0),
+ UTIME_BOGUS_NEG = -1 - ((UTIME_NOW == -1 || UTIME_OMIT == -1)
+ ? (1 + (UTIME_NOW == -2) + (UTIME_OMIT == -2))
+ : 0)
+};
+
+#endif /* GL_TEST_UTIMENS */
+
+/* This function is designed to test both utimens(a,b) and
+ utimensat(AT_FDCWD,a,b,0). FUNC is the function to test. */
+static int
+test_utimens (int (*func) (char const *, struct timespec const *))
+{
+ struct stat st1;
+ struct stat st2;
+
+ ASSERT (close (creat (BASE "file", 0600)) == 0);
+ /* If utimens truncates to less resolution than the file system
+ supports, then time can appear to go backwards between now and
+ the follow-up utimens(file,NULL). Use UTIMECMP_TRUNCATE_SOURCE
+ to compensate, with st1 as the source. */
+ ASSERT (stat (BASE "file", &st1) == 0);
+
+ /* Invalid arguments. */
+ errno = 0;
+ ASSERT (func ("no_such", NULL) == -1);
+ ASSERT (errno == ENOENT);
+ errno = 0;
+ ASSERT (func ("", NULL) == -1);
+ ASSERT (errno == ENOENT);
+ {
+ struct timespec ts[2] = { { Y2K, UTIME_BOGUS_POS }, { Y2K, 0 } };
+ errno = 0;
+ ASSERT (func (BASE "file", ts) == -1);
+ ASSERT (errno == EINVAL);
+ }
+ {
+ struct timespec ts[2] = { { Y2K, 0 }, { Y2K, UTIME_BOGUS_NEG } };
+ errno = 0;
+ ASSERT (func (BASE "file", ts) == -1);
+ ASSERT (errno == EINVAL);
+ }
+ ASSERT (stat (BASE "file", &st2) == 0);
+ ASSERT (st1.st_atime == st2.st_atime);
+ ASSERT (get_stat_atime_ns (&st1) == get_stat_atime_ns (&st2));
+ ASSERT (utimecmp (BASE "file", &st1, &st2, 0) == 0);
+
+ /* Set both times. */
+ {
+ struct timespec ts[2] = { { Y2K, BILLION / 2 - 1 }, { Y2K, BILLION - 1 } };
+ ASSERT (func (BASE "file", ts) == 0);
+ ASSERT (stat (BASE "file", &st2) == 0);
+ ASSERT (st2.st_atime == Y2K);
+ ASSERT (0 <= get_stat_atime_ns (&st2));
+ ASSERT (get_stat_atime_ns (&st2) < BILLION / 2);
+ ASSERT (st2.st_mtime == Y2K);
+ ASSERT (0 <= get_stat_mtime_ns (&st2));
+ ASSERT (get_stat_mtime_ns (&st2) < BILLION);
+ }
+
+ /* Play with UTIME_OMIT, UTIME_NOW. */
+ {
+ struct timespec ts[2] = { { BILLION, UTIME_OMIT }, { 0, UTIME_NOW } };
+ ASSERT (func (BASE "file", ts) == 0);
+ ASSERT (stat (BASE "file", &st2) == 0);
+ ASSERT (st2.st_atime == Y2K);
+ ASSERT (0 <= get_stat_atime_ns (&st2));
+ ASSERT (get_stat_atime_ns (&st2) < BILLION / 2);
+ /* See comment above about this utimecmp call. */
+ ASSERT (0 <= utimecmp (BASE "file", &st2, &st1, UTIMECMP_TRUNCATE_SOURCE));
+ }
+
+ /* Cleanup. */
+ ASSERT (unlink (BASE "file") == 0);
+ return 0;
+}