mirror of
https://github.com/jart/cosmopolitan.git
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77 lines
4.1 KiB
C
77 lines
4.1 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Copyright 2020 Justine Alexandra Roberts Tunney │
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│ │
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│ Permission to use, copy, modify, and/or distribute this software for │
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│ any purpose with or without fee is hereby granted, provided that the │
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│ above copyright notice and this permission notice appear in all copies. │
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│ │
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│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
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│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
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│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
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│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
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│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
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│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
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│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
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│ PERFORMANCE OF THIS SOFTWARE. │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "libc/calls/asan.internal.h"
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#include "libc/calls/calls.h"
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#include "libc/calls/internal.h"
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#include "libc/calls/struct/timespec.internal.h"
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#include "libc/dce.h"
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#include "libc/intrin/asan.internal.h"
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#include "libc/intrin/describeflags.internal.h"
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#include "libc/intrin/strace.internal.h"
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#include "libc/intrin/weaken.h"
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#include "libc/sysv/consts/at.h"
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#include "libc/sysv/errfuns.h"
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#include "libc/zipos/zipos.internal.h"
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/**
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* Sets access/modified time on file, the modern way.
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*
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* XNU only has microsecond (1e-6) accuracy and there's no
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* `dirfd`-relative support. Windows only has hectonanosecond (1e-7)
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* accuracy. RHEL5 doesn't support `dirfd` or `flags` and will truncate
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* timestamps to seconds.
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*
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* If you'd rather specify an open file descriptor rather than its
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* filesystem path, then consider using futimens().
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*
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* @param dirfd can be `AT_FDCWD` or an open directory
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* @param path is filename whose timestamps should be modified
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* @param ts is {access, modified} timestamps, or null for current time
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* @param flags can have `AT_SYMLINK_NOFOLLOW` when `path` is specified
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* @return 0 on success, or -1 w/ errno
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* @raise EINVAL if `flags` had an unrecognized value
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* @raise EPERM if pledge() is in play without `fattr` promise
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* @raise EACCES if unveil() is in play and `path` isn't unveiled
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* @raise ENOTSUP if `path` is a zip filesystem path or `dirfd` is zip
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* @raise EINVAL if `ts` specifies a nanosecond value that's out of range
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* @raise ENAMETOOLONG if symlink-resolved `path` length exceeds `PATH_MAX`
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* @raise ENAMETOOLONG if component in `path` exists longer than `NAME_MAX`
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* @raise EBADF if `dirfd` isn't a valid fd or `AT_FDCWD`
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* @raise EFAULT if `path` or `ts` memory was invalid
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* @raise EROFS if `path` is on read-only filesystem
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* @raise ENOSYS on bare metal or on rhel5 when `dirfd` or `flags` is used
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* @asyncsignalsafe
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* @threadsafe
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*/
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int utimensat(int dirfd, const char *path, const struct timespec ts[2],
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int flags) {
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int rc;
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if (!path) {
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rc = efault(); // linux kernel abi behavior isn't supported
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} else {
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rc = __utimens(dirfd, path, ts, flags);
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}
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STRACE("utimensat(%s, %#s, {%s, %s}, %#o) → %d% m", DescribeDirfd(dirfd),
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path, DescribeTimespec(0, ts), DescribeTimespec(0, ts ? ts + 1 : 0),
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flags, rc);
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return rc;
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}
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