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authorAdhemerval Zanella <adhemerval.zanella@linaro.org>2022-04-27 13:40:30 -0300
committerAdhemerval Zanella <adhemerval.zanella@linaro.org>2022-04-28 09:58:44 -0300
commit118a2aee07f64d605b6668cbe195c1f44eac6be6 (patch)
tree3c8cf185865a8797237217743d54e8f01d244d56 /io/tst-lchmod.c
parent6f043e0ee7e477f50a44024ed0cb579d5e3f511d (diff)
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linux: Fix fchmodat with AT_SYMLINK_NOFOLLOW for 64 bit time_t (BZ#29097)
The AT_SYMLINK_NOFOLLOW emulation ues the default 32 bit stat internal calls, which fails with EOVERFLOW if the file constains timestamps beyond 2038. Checked on i686-linux-gnu.
Diffstat (limited to 'io/tst-lchmod.c')
-rw-r--r--io/tst-lchmod.c22
1 files changed, 21 insertions, 1 deletions
diff --git a/io/tst-lchmod.c b/io/tst-lchmod.c
index c644f56..c1c41bd 100644
--- a/io/tst-lchmod.c
+++ b/io/tst-lchmod.c
@@ -67,9 +67,26 @@ select_path (bool do_relative_path, const char *full_path, const char *relative_
}
static void
+update_file_time_to_y2038 (const char *fname, int flags)
+{
+#ifdef CHECK_TIME64
+ /* Y2038 threshold plus 1 second. */
+ const struct timespec ts[] = { { 0x80000001LL, 0}, { 0x80000001LL } };
+ TEST_VERIFY_EXIT (utimensat (AT_FDCWD, fname, ts, flags) == 0);
+#endif
+}
+
+static void
test_1 (bool do_relative_path, int (*chmod_func) (int fd, const char *, mode_t, int))
{
char *tempdir = support_create_temp_directory ("tst-lchmod-");
+#ifdef CHECK_TIME64
+ if (!support_path_support_time64 (tempdir))
+ {
+ puts ("info: test skipped, filesystem does not support 64 bit time_t");
+ return;
+ }
+#endif
char *path_dangling = xasprintf ("%s/dangling", tempdir);
char *path_file = xasprintf ("%s/file", tempdir);
@@ -93,9 +110,12 @@ test_1 (bool do_relative_path, int (*chmod_func) (int fd, const char *, mode_t,
xsymlink ("loop", path_loop);
xsymlink ("target-does-not-exist", path_dangling);
+ update_file_time_to_y2038 (path_file, 0);
+ update_file_time_to_y2038 (path_to_file, AT_SYMLINK_NOFOLLOW);
+
/* Check that the modes do not collide with what we will use in the
test. */
- struct stat64 st;
+ struct stat st;
xstat (path_file, &st);
TEST_VERIFY ((st.st_mode & 0777) != 1);
xlstat (path_to_file, &st);