mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-02-01 03:53:33 +00:00
f531acc8f9
- Invent openatemp() API - Invent O_UNLINK open flag - Introduce getenv_secure() API - Remove `git pull` from cosmocc - Fix utimes() when path is NULL - Fix mktemp() to never return NULL - Fix utimensat() UTIME_OMIT on XNU - Improve utimensat() code for RHEL5 - Turn `argv[0]` C:/ to /C/ on Windows - Introduce tmpnam() and tmpnam_r() APIs - Fix more const issues with internal APIs - Permit utimes() on WIN32 in O_RDONLY mode - Fix fdopendir() to check fd is a directory - Fix recent crash regression in landlock make - Fix futimens(AT_FDCWD, NULL) to return EBADF - Use workaround so `make -j` doesn't fork bomb - Rename dontdiscard to __wur (just like glibc) - Fix st_size for WIN32 symlinks containing UTF-8 - Introduce stdio ext APIs needed by GNU coreutils - Fix lstat() on WIN32 for symlinks to directories - Move some constants from normalize.inc to limits.h - Fix segv with memchr() and memcmp() overlapping page - Implement POSIX fflush() behavior for reader streams - Implement AT_SYMLINK_NOFOLLOW for utimensat() on WIN32 - Don't change read-only status of existing files on WIN32 - Correctly handle `0x[^[:xdigit:]]` case in strtol() functions
68 lines
3.9 KiB
C
68 lines
3.9 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/struct/timespec.h"
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#include "libc/calls/struct/timespec.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/sysv/errfuns.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`
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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 EINVAL on XNU or RHEL5 when any `flags` are used
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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 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 (e.g. zipos)
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* @raise ENOTSUP on XNU or RHEL5 when `dirfd` isn't `AT_FDCWD`
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* @raise ENOSYS on bare metal
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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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