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74 lines
2.3 KiB
C
74 lines
2.3 KiB
C
/* Check if path supports 64-bit time interfaces.
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Copyright (C) 2021-2025 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 <fcntl.h>
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#include <unistd.h>
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#include <support/check.h>
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#include <support/support.h>
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#include <sys/stat.h>
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#ifdef __linux__
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#include <sysdep.h>
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#endif
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#ifdef __linux__
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static int
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utimesat_call (const char *path, const struct __timespec64 tsp[2])
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{
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# ifndef __NR_utimensat_time64
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# define __NR_utimensat_time64 __NR_utimensat
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# endif
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return syscall (__NR_utimensat_time64, AT_FDCWD, path, &tsp[0], 0);
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}
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#endif
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bool
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support_path_support_time64_value (const char *path, int64_t at, int64_t mt)
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{
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#ifdef __linux__
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/* Obtain the original timestamps to restore at the end. */
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struct statx ostx;
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TEST_VERIFY_EXIT (statx (AT_FDCWD, path, 0, STATX_BASIC_STATS, &ostx) == 0);
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const struct __timespec64 tsp[] = { { at, 0 }, { mt, 0 } };
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/* Return is kernel does not support __NR_utimensat_time64. */
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if (utimesat_call (path, tsp) == -1)
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return false;
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/* Verify if the last access and last modification time match the ones
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obtained with statx. */
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struct statx stx;
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TEST_VERIFY_EXIT (statx (AT_FDCWD, path, 0, STATX_BASIC_STATS, &stx) == 0);
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bool support = stx.stx_atime.tv_sec == tsp[0].tv_sec
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&& stx.stx_mtime.tv_sec == tsp[1].tv_sec;
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/* Reset to original timestamps. */
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const struct __timespec64 otsp[] =
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{
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{ ostx.stx_atime.tv_sec, ostx.stx_atime.tv_nsec },
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{ ostx.stx_mtime.tv_sec, ostx.stx_mtime.tv_nsec },
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};
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TEST_VERIFY_EXIT (utimesat_call (path, otsp) == 0);
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return support;
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#else
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return true;
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#endif
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}
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