[PATCH 09/52] io: Add basic tests for utimensat

[Adhemerval Zanella <adhemerval.zanella@linaro.org>]

Checked on x86_64-linux-gnu and i686-linux-gnu
---
 io/Makefile        |   2 +-
 io/tst-utimensat.c | 115 +++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 116 insertions(+), 1 deletion(-)
 create mode 100644 io/tst-utimensat.c

diff --git a/io/Makefile b/io/Makefile
index b7bebe923f..59d36e8782 100644
--- a/io/Makefile
+++ b/io/Makefile
@@ -68,7 +68,7 @@ tests		:= test-utime test-stat test-stat2 test-lfs tst-getcwd \
 		   tst-fts tst-fts-lfs tst-open-tmpfile \
 		   tst-copy_file_range tst-getcwd-abspath tst-lockf \
 		   tst-ftw-lnk tst-file_change_detection tst-lchmod \
-		   tst-ftw-bz26353
+		   tst-ftw-bz26353 tst-utimensat
 
 # Likewise for statx, but we do not need static linking here.
 tests-internal += tst-statx
diff --git a/io/tst-utimensat.c b/io/tst-utimensat.c
new file mode 100644
index 0000000000..b62e409e07
--- /dev/null
+++ b/io/tst-utimensat.c
@@ -0,0 +1,115 @@
+/* utimensat basic tests.
+   Copyright (C) 2021 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 of the License, or (at your option) any later version.
+
+   The GNU C Library 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <https://www.gnu.org/licenses/>.  */
+
+#include <time.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+#include <sys/time.h>
+#include <support/check.h>
+#include <support/support.h>
+#include <support/temp_file.h>
+#include <support/xunistd.h>
+
+#ifndef struct_stat
+# define struct_stat struct stat64
+#endif
+
+static int temp_fd = -1;
+static char *testfile;
+static char *testlink;
+
+/* struct timeval array with Y2038 threshold minus 2 and 1 seconds.  */
+const static struct timespec t1[2] = { { 0x7FFFFFFE, 0 },
+				       { 0x7FFFFFFF, 0 } };
+
+/* struct timeval array with Y2038 threshold plus 1 and 2 seconds.  */
+const static struct timespec t2[2] = { { 0x80000001ULL, 0 },
+				       { 0x80000002ULL, 0 } };
+
+/* struct timeval array around Y2038 threshold.  */
+const static struct timespec t3[2] = { { 0x7FFFFFFE, 0 },
+				       { 0x80000002ULL, 0 } };
+
+static void
+do_prepare (int argc, char *argv[])
+{
+  temp_fd = create_temp_file ("tst-utimensat", &testfile);
+  TEST_VERIFY_EXIT (temp_fd > 0);
+
+  testlink = xasprintf ("%s-symlink", testfile);
+  xsymlink (testfile, testlink);
+  add_temp_file (testlink);
+}
+#define PREPARE do_prepare
+
+static void
+test_utimensat_helper (const struct timespec ts[2])
+{
+  /* Check if we run on port with 32 bit time_t size */
+  {
+    time_t t;
+    if (__builtin_add_overflow (ts->tv_sec, 0, &t))
+      return;
+  }
+
+  {
+    TEST_VERIFY_EXIT (utimensat (temp_fd, testfile, ts, 0) == 0);
+
+    struct_stat st;
+    xfstat (temp_fd, &st);
+
+    /* Check if seconds for atime match */
+    TEST_COMPARE (st.st_atime, ts[0].tv_sec);
+
+    /* Check if seconds for mtime match */
+    TEST_COMPARE (st.st_mtime, ts[1].tv_sec);
+  }
+
+  {
+    struct_stat stfile_orig;
+    xlstat (testfile, &stfile_orig);
+
+    TEST_VERIFY_EXIT (utimensat (0 /* ignored  */, testlink, ts,
+				 AT_SYMLINK_NOFOLLOW)
+		       == 0);
+    struct_stat stlink;
+    xlstat (testlink, &stlink);
+
+    TEST_COMPARE (stlink.st_atime, ts[0].tv_sec);
+    TEST_COMPARE (stlink.st_mtime, ts[1].tv_sec);
+
+    /* Check if the timestamp from original file is not changed.  */
+    struct_stat stfile;
+    xlstat (testfile, &stfile);
+
+    TEST_COMPARE (stfile_orig.st_atime, stfile.st_atime);
+    TEST_COMPARE (stfile_orig.st_mtime, stfile.st_mtime);
+  }
+}
+
+static int
+do_test (void)
+{
+  test_utimensat_helper (t1);
+  test_utimensat_helper (t2);
+  test_utimensat_helper (t3);
+
+  return 0;
+}
+
+#include <support/test-driver.c>
-- 
2.25.1