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102 lines
3.1 KiB
C
102 lines
3.1 KiB
C
/* Change access and modification times of open file. Linux version.
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Copyright (C) 2007-2023 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 <errno.h>
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#include <sys/stat.h>
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#include <sysdep.h>
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#include <time.h>
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#include <kernel-features.h>
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/* Helper function defined for easy reusage of the code which calls utimensat
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and utimensat_time64 syscall. */
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int
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__utimensat64_helper (int fd, const char *file,
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const struct __timespec64 tsp64[2], int flags)
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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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#ifdef __ASSUME_TIME64_SYSCALLS
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return INLINE_SYSCALL_CALL (utimensat_time64, fd, file, &tsp64[0], flags);
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#else
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/* For UTIME_NOW and UTIME_OMIT the value of tv_sec field is ignored. */
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# define TS_SPECIAL(ts) \
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((ts).tv_nsec == UTIME_NOW || (ts).tv_nsec == UTIME_OMIT)
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bool need_time64 = tsp64 != NULL
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&& ((!TS_SPECIAL (tsp64[0])
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&& !in_int32_t_range (tsp64[0].tv_sec))
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|| (!TS_SPECIAL (tsp64[1])
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&& !in_int32_t_range (tsp64[1].tv_sec)));
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if (need_time64)
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{
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int r = INLINE_SYSCALL_CALL (utimensat_time64, fd, file, &tsp64[0],
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flags);
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if (r == 0 || errno != ENOSYS)
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return r;
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__set_errno (EOVERFLOW);
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return -1;
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}
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struct timespec tsp32[2], *ptsp32 = NULL;
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if (tsp64)
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{
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tsp32[0] = valid_timespec64_to_timespec (tsp64[0]);
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tsp32[1] = valid_timespec64_to_timespec (tsp64[1]);
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ptsp32 = tsp32;
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}
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return INLINE_SYSCALL_CALL (utimensat, fd, file, ptsp32, flags);
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#endif
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}
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libc_hidden_def (__utimensat64_helper)
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/* Change the access time of FILE to TSP[0] and
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the modification time of FILE to TSP[1].
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Starting with 2.6.22 the Linux kernel has the utimensat syscall. */
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int
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__utimensat64 (int fd, const char *file, const struct __timespec64 tsp64[2],
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int flags)
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{
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if (file == NULL)
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return INLINE_SYSCALL_ERROR_RETURN_VALUE (EINVAL);
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return __utimensat64_helper (fd, file, &tsp64[0], flags);
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}
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#if __TIMESIZE != 64
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libc_hidden_def (__utimensat64)
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int
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__utimensat (int fd, const char *file, const struct timespec tsp[2],
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int flags)
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{
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struct __timespec64 tsp64[2];
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if (tsp)
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{
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tsp64[0] = valid_timespec_to_timespec64 (tsp[0]);
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tsp64[1] = valid_timespec_to_timespec64 (tsp[1]);
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}
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return __utimensat64 (fd, file, tsp ? &tsp64[0] : NULL, flags);
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}
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#endif
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weak_alias (__utimensat, utimensat)
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