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https://github.com/jart/cosmopolitan.git
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ccbae7799e
This change also found a few POSIX compliance bugs with errnos. Another bug was discovered where, on Windows, pread() and pwrite() could modify the file position in cases where ReadFile() returned an error e.g. when seeking past the end of file. We also have more tests!
74 lines
4 KiB
C
74 lines
4 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/struct/itimerval.internal.h"
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#include "libc/calls/struct/timeval.h"
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#include "libc/calls/struct/timeval.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/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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* Changes last accessed/modified timestamps on file.
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*
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* @param tv is access/modified timestamps, or NULL which means now
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* @return 0 on success, or -1 w/ errno
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* @raise ENOTSUP if `path` is a zip filesystem path
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* @raise EROFS if `path` is on a read-only filesystem
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* @raise EFAULT if `path` or `tv` points to invalid memory
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* @raise EPERM if pledge() is in play without fattr promise
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* @raise ENOENT if `path` doesn't exist or is an empty string
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* @raise EACCES if unveil() is in play and `path` isn't unveiled
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* @raise ELOOP if a loop was detected resolving components of `path`
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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 EINVAL if `tv` specifies a microseconds value that's out of range
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* @raise EACCES if we don't have permission to search a component of `path`
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* @raise ENOTDIR if a directory component in `path` exists as non-directory
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* @raise ENOSYS on bare metal
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* @asyncsignalsafe
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* @see stat()
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*/
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int utimes(const char *path, const struct timeval tv[2]) {
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int rc;
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struct ZiposUri zipname;
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if (IsMetal()) {
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rc = enosys();
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} else if (IsAsan() && tv &&
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(!__asan_is_valid_timeval(tv + 0) ||
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!__asan_is_valid_timeval(tv + 1))) {
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rc = efault();
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} else if (_weaken(__zipos_parseuri) &&
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_weaken(__zipos_parseuri)(path, &zipname) != -1) {
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rc = enotsup();
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} else if (!IsWindows()) {
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// we don't modernize utimes() into utimensat() because the
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// latter is poorly supported and utimes() works everywhere
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rc = sys_utimes(path, tv);
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} else {
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rc = sys_utimes_nt(path, tv);
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}
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STRACE("utimes(%#s, {%s, %s}) → %d% m", path, DescribeTimeval(0, tv),
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DescribeTimeval(0, tv ? tv + 1 : 0), rc);
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return rc;
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}
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