mirror of
https://github.com/jart/cosmopolitan.git
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6f7d0cb1c3
This makes breaking changes to add underscores to many non-standard function names provided by the c library. MODE=tiny is now tinier and we now use smaller locks that are better for tiny apps in this mode. Some headers have been renamed to be in the same folder as the build package, so it'll be easier to know which build dependency is needed. Certain old misguided interfaces have been removed. Intel intrinsics headers are now listed in libc/isystem (but not in the amalgamation) to help further improve open source compatibility. Header complexity has also been reduced. Lastly, more shell scripts are now available.
83 lines
4.1 KiB
C
83 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 atime/mtime on file, the modern way.
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*
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* This is two functions in one. If `path` is null then this function
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* becomes the same as `futimens(dirfd, ts)`.
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*
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* XNU and RHEL5 only have microsecond accuracy and there's no `dirfd`
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* relative support.
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*
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* @param dirfd should AT_FDCWD
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* @param ts is atime/mtime, or null for current time
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* @param flags can have AT_SYMLINK_NOFOLLOW
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* @raise ENOSYS on RHEL5 if path is NULL
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* @raise EINVAL if flags had unrecognized bits
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* @raise EINVAL if path is NULL and flags has AT_SYMLINK_NOFOLLOW
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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 file system is read-only
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* @raise ENAMETOOLONG
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* @raise EPERM
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* @see futimens()
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* @asyncsignalsafe
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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 (IsAsan() && ((dirfd == AT_FDCWD && !__asan_is_valid(path, 1)) ||
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(ts && (!__asan_is_valid_timespec(ts + 0) ||
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!__asan_is_valid_timespec(ts + 1))))) {
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rc = efault(); // bad memory
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} else if ((flags & ~AT_SYMLINK_NOFOLLOW)) {
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rc = einval(); // unsupported flag
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} else if (!path && flags) {
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rc = einval(); // futimens() doesn't take flags
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} else if ((path || __isfdkind(dirfd, kFdZip)) && _weaken(__zipos_notat) &&
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(rc = __zipos_notat(dirfd, path)) == -1) {
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STRACE("zipos utimensat not supported yet");
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} else if (!IsWindows()) {
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rc = sys_utimensat(dirfd, path, ts, flags);
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} else {
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rc = sys_utimensat_nt(dirfd, path, ts, flags);
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}
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if (ts) {
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STRACE("utimensat(%s, %#s, {{%,ld, %,ld}, {%,ld, %,ld}}, %#b) → %d% m",
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DescribeDirfd(dirfd), path, ts[0].tv_sec, ts[0].tv_nsec,
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ts[1].tv_sec, ts[1].tv_nsec, flags, rc);
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} else {
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STRACE("utimensat(%s, %#s, 0, %#b) → %d% m", DescribeDirfd(dirfd), path,
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flags, rc);
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}
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return rc;
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}
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