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b2970919ba
Some Linux filesystems might not fully support 64 bit timestamps [1],
which make some Linux specific tests to fail when they check for the
functionality.
This patch adds a new libsupport function, support_path_support_time64,
that returns whether the target file supports or not 64 bit timestamps.
The support is checked by issuing a utimensat and verifying both the
last access and last modification time against a statx call.
The tests that might fail are also adjusted to check the file support
as well:
$ dd if=/dev/zero of=loopbackfile.img bs=100M count=1
1+0 records in
1+0 records out
104857600 bytes (105 MB, 100 MiB) copied, 0,0589568 s, 1,8 GB/s
$ sudo losetup -fP loopbackfile.img
$ mkfs.xfs loopbackfile.img
meta-data=loopbackfile.img isize=512 agcount=4, agsize=6400 blks
= sectsz=512 attr=2, projid32bit=1
= crc=1 finobt=1, sparse=1, rmapbt=0
= reflink=1
data = bsize=4096 blocks=25600, imaxpct=25
= sunit=0 swidth=0 blks
naming =version 2 bsize=4096 ascii-ci=0, ftype=1
log =internal log bsize=4096 blocks=1368, version=2
= sectsz=512 sunit=0 blks, lazy-count=1
realtime =none extsz=4096 blocks=0, rtextents=0
$ mkdir loopfs
$ sudo mount -o loop /dev/loop0 loopfs/
$ sudo chown -R azanella:azanella loopfs
$ TMPDIR=loopfs/ ./testrun.sh misc/tst-utimes
error: ../sysdeps/unix/sysv/linux/tst-utimes.c:55: File loopfs//utimesfECsK1 does not support 64-bit timestamps
[1] https://bugzilla.redhat.com/show_bug.cgi?id=1795576
93 lines
2.4 KiB
C
93 lines
2.4 KiB
C
/* Test for utime.
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Copyright (C) 2021 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <time.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <utime.h>
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#include <support/check.h>
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#include <support/support.h>
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#include <support/xunistd.h>
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#include <support/temp_file.h>
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static int temp_fd = -1;
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static char *testfile;
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/* struct utimbuf with Y2038 threshold minus 2 and 1 seconds. */
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const static struct utimbuf t1 = { 0x7FFFFFFE, 0x7FFFFFFF };
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/* struct utimbuf with Y2038 threshold plus 1 and 2 seconds. */
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const static struct utimbuf t2 = { 0x80000001ULL, 0x80000002ULL };
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/* struct utimbuf around Y2038 threshold. */
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const static struct utimbuf t3 = { 0x7FFFFFFE, 0x80000002ULL };
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#define PREPARE do_prepare
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static void
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do_prepare (int argc, char *argv[])
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{
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temp_fd = create_temp_file ("utime", &testfile);
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TEST_VERIFY_EXIT (temp_fd > 0);
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}
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static int
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test_utime_helper (const struct utimbuf *ut)
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{
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if (!support_path_support_time64 (testfile))
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FAIL_UNSUPPORTED ("File %s does not support 64-bit timestamps",
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testfile);
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struct stat64 st;
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int result;
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time_t t;
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/* Check if we run on port with 32 bit time_t size */
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if (__builtin_add_overflow (ut->actime, 0, &t))
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{
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printf("time_t overflow!");
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return 0;
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}
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result = utime (testfile, ut);
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TEST_VERIFY_EXIT (result == 0);
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xfstat (temp_fd, &st);
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/* Check if seconds for actime match */
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TEST_COMPARE (st.st_atime, ut->actime);
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/* Check if seconds for modtime match */
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TEST_COMPARE (st.st_mtime, ut->modtime);
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return 0;
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}
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static int
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do_test (void)
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{
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test_utime_helper (&t1);
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test_utime_helper (&t2);
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test_utime_helper (&t3);
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return 0;
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}
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#include <support/test-driver.c>
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