1 files changed, 184 insertions, 0 deletions
diff --git a/gnulib-tests/test-utimens.h b/gnulib-tests/test-utimens.h
new file mode 100644
index 0000000..05a9cb2
--- /dev/null
+++ b/gnulib-tests/test-utimens.h
@@ -0,0 +1,184 @@
+/* Test of file timestamp modification functions.
+   Copyright (C) 2009-2022 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 3 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 <https://www.gnu.org/licenses/>.  */
+
+#include "test-utimens-common.h"
+
+/* This file is designed to test both utimens(a,b) and
+   utimensat(AT_FDCWD,a,b,0).  FUNC is the function to test.  Assumes
+   that BASE and ASSERT are already defined.  If PRINT, warn before
+   skipping tests with status 77.  */
+static int
+test_utimens (int (*func) (char const *, struct timespec const *), bool print)
+{
+  struct stat st1;
+  struct stat st2;
+
+  ASSERT (close (creat (BASE "file", 0600)) == 0);
+  /* If utimens truncates to worse resolution than the file system
+     supports, then time can appear to go backwards between now and a
+     follow-up utimens with UTIME_NOW or a NULL timespec.  Use
+     UTIMECMP_TRUNCATE_SOURCE to compensate, with st1 as the
+     source.  */
+  ASSERT (stat (BASE "file", &st1) == 0);
+  nap ();
+  ASSERT (func (BASE "file", NULL) == 0);
+  ASSERT (stat (BASE "file", &st2) == 0);
+  ASSERT (0 <= utimecmp (BASE "file", &st2, &st1, UTIMECMP_TRUNCATE_SOURCE));
+  if (check_ctime)
+    ASSERT (ctime_compare (&st1, &st2) < 0);
+  {
+    /* On some NFS systems, the 'now' timestamp of creat or a NULL
+       timespec is determined by the server, but the 'now' timestamp
+       determined by gettime() (as is done when using UTIME_NOW) is
+       determined by the client; since the two machines are not
+       necessarily on the same clock, this is another case where time
+       can appear to go backwards.  The rest of this test cares about
+       client time, so manually use gettime() to set both times.  */
+    struct timespec ts[2];
+    gettime (&ts[0]);
+    ts[1] = ts[0];
+    ASSERT (func (BASE "file", ts) == 0);
+    ASSERT (stat (BASE "file", &st1) == 0);
+    nap ();
+  }
+
+  /* Invalid arguments.  */
+  errno = 0;
+  ASSERT (func ("no_such", NULL) == -1);
+  ASSERT (errno == ENOENT);
+  errno = 0;
+  ASSERT (func ("no_such/", NULL) == -1);
+  ASSERT (errno == ENOENT || errno == ENOTDIR);
+  errno = 0;
+  ASSERT (func ("", NULL) == -1);
+  ASSERT (errno == ENOENT);
+  {
+    struct timespec ts[2];
+    ts[0].tv_sec = Y2K;
+    ts[0].tv_nsec = UTIME_BOGUS_POS;
+    ts[1].tv_sec = Y2K;
+    ts[1].tv_nsec = 0;
+    errno = 0;
+    ASSERT (func (BASE "file", ts) == -1);
+    ASSERT (errno == EINVAL);
+  }
+  {
+    struct timespec ts[2];
+    ts[0].tv_sec = Y2K;
+    ts[0].tv_nsec = 0;
+    ts[1].tv_sec = Y2K;
+    ts[1].tv_nsec = UTIME_BOGUS_NEG;
+    errno = 0;
+    ASSERT (func (BASE "file", ts) == -1);
+    ASSERT (errno == EINVAL);
+  }
+  {
+    struct timespec ts[2];
+    ts[0].tv_sec = Y2K;
+    ts[0].tv_nsec = 0;
+    ts[1] = ts[0];
+    errno = 0;
+    ASSERT (func (BASE "file/", ts) == -1);
+    ASSERT (errno == ENOTDIR || 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];
+    ts[0].tv_sec = Y2K;
+    ts[0].tv_nsec = BILLION / 2 - 1;
+    ts[1].tv_sec = Y2K;
+    ts[1].tv_nsec = 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);
+    if (check_ctime)
+      ASSERT (ctime_compare (&st1, &st2) < 0);
+  }
+
+  /* Play with UTIME_OMIT, UTIME_NOW.  */
+  {
+    struct stat st3;
+    struct timespec ts[2];
+    ts[0].tv_sec = BILLION;
+    ts[0].tv_nsec = UTIME_OMIT;
+    ts[1].tv_sec = 0;
+    ts[1].tv_nsec = UTIME_NOW;
+    nap ();
+    ASSERT (func (BASE "file", ts) == 0);
+    ASSERT (stat (BASE "file", &st3) == 0);
+    ASSERT (st3.st_atime == Y2K);
+    ASSERT (0 <= get_stat_atime_ns (&st3));
+    ASSERT (get_stat_atime_ns (&st3) < BILLION / 2);
+    /* See comment above about this utimecmp call.  */
+    ASSERT (0 <= utimecmp (BASE "file", &st3, &st1, UTIMECMP_TRUNCATE_SOURCE));
+    if (check_ctime)
+      ASSERT (ctime_compare (&st2, &st3) < 0);
+    nap ();
+    ts[0].tv_nsec = 0;
+    ts[1].tv_nsec = UTIME_OMIT;
+    ASSERT (func (BASE "file", ts) == 0);
+    ASSERT (stat (BASE "file", &st2) == 0);
+    ASSERT (st2.st_atime == BILLION);
+    ASSERT (get_stat_atime_ns (&st2) == 0);
+    ASSERT (st3.st_mtime == st2.st_mtime);
+    ASSERT (get_stat_mtime_ns (&st3) == get_stat_mtime_ns (&st2));
+    if (check_ctime > 0)
+      ASSERT (ctime_compare (&st3, &st2) < 0);
+  }
+
+  /* Make sure this dereferences symlinks.  */
+  if (symlink (BASE "file", BASE "link"))
+    {
+      ASSERT (unlink (BASE "file") == 0);
+      if (print)
+        fputs ("skipping test: symlinks not supported on this file system\n",
+               stderr);
+      return 77;
+    }
+  ASSERT (lstat (BASE "link", &st1) == 0);
+  ASSERT (st1.st_mtime != Y2K);
+  errno = 0;
+  ASSERT (func (BASE "link/", NULL) == -1);
+  ASSERT (errno == ENOTDIR);
+  {
+    struct timespec ts[2];
+    ts[0].tv_sec = Y2K;
+    ts[0].tv_nsec = 0;
+    ts[1] = ts[0];
+    ASSERT (func (BASE "link", ts) == 0);
+    ASSERT (lstat (BASE "link", &st2) == 0);
+    /* Can't compare atimes, since lstat() changes symlink atime on cygwin.  */
+    ASSERT (st1.st_mtime == st2.st_mtime);
+    ASSERT (stat (BASE "link", &st2) == 0);
+    ASSERT (st2.st_mtime == Y2K);
+    ASSERT (get_stat_mtime_ns (&st2) == 0);
+  }
+
+  /* Cleanup.  */
+  ASSERT (unlink (BASE "link") == 0);
+  ASSERT (unlink (BASE "file") == 0);
+  return 0;
+}