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https://github.com/jart/cosmopolitan.git
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55 lines
3 KiB
C
55 lines
3 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
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│ vi: set et 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/struct/timespec.h"
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#include "libc/calls/struct/timespec.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/strace.h"
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#include "libc/sysv/errfuns.h"
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/**
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* Sets atime/mtime on file descriptor.
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*
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* @param ts is atime/mtime, or null for current time
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* @return 0 on success, or -1 w/ errno
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* @raise EBADF if `fd` isn't an open file descriptor
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* @raise EROFS if `fd` is on zip or read-only filesystem
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* @raise EPERM if pledge() is in play without `fattr` promise
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* @raise EINVAL if `tv` specifies a microsecond value that's out of range
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* @raise ENOSYS on RHEL5 or bare metal
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* @see futimens() for modern version
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* @asyncsignalsafe
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*/
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int futimes(int fd, const struct timeval tv[2]) {
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int rc;
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struct timespec ts[2];
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if (fd < 0) {
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rc = ebadf(); // so we don't confuse __utimens if caller passes AT_FDCWD
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} else if (tv) {
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ts[0] = timeval_totimespec(tv[0]);
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ts[1] = timeval_totimespec(tv[1]);
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rc = __utimens(fd, 0, ts, 0);
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} else {
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rc = __utimens(fd, 0, 0, 0);
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}
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STRACE("futimes(%d, {%s, %s}) → %d% m", fd, 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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