mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-01-31 11:37:35 +00:00
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 -*-│
|
|
│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi │
|
|
╞══════════════════════════════════════════════════════════════════════════════╡
|
|
│ Copyright 2021 Justine Alexandra Roberts Tunney │
|
|
│ │
|
|
│ Permission to use, copy, modify, and/or distribute this software for │
|
|
│ any purpose with or without fee is hereby granted, provided that the │
|
|
│ above copyright notice and this permission notice appear in all copies. │
|
|
│ │
|
|
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
|
|
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
|
|
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
|
|
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
|
|
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
|
|
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
|
|
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
|
|
│ PERFORMANCE OF THIS SOFTWARE. │
|
|
╚─────────────────────────────────────────────────────────────────────────────*/
|
|
#include "libc/calls/calls.h"
|
|
#include "libc/calls/syscall-nt.internal.h"
|
|
#include "libc/calls/syscall-sysv.internal.h"
|
|
#include "libc/dce.h"
|
|
#include "libc/intrin/describeflags.h"
|
|
#include "libc/intrin/strace.h"
|
|
#include "libc/intrin/weaken.h"
|
|
#include "libc/runtime/zipos.internal.h"
|
|
#include "libc/sysv/errfuns.h"
|
|
|
|
/**
|
|
* Creates hard filesystem link.
|
|
*
|
|
* This allows two names to point to the same file data on disk. They
|
|
* can only be differentiated by examining the inode number.
|
|
*
|
|
* @param flags can have AT_EMPTY_PATH or AT_SYMLINK_NOFOLLOW
|
|
* @return 0 on success, or -1 w/ errno
|
|
* @raise EROFS if either path is under /zip/...
|
|
* @asyncsignalsafe
|
|
*/
|
|
int linkat(int olddirfd, const char *oldpath, int newdirfd, const char *newpath,
|
|
int flags) {
|
|
int rc;
|
|
if (_weaken(__zipos_notat) &&
|
|
((rc = __zipos_notat(olddirfd, oldpath)) == -1 ||
|
|
(rc = __zipos_notat(newdirfd, newpath)) == -1)) {
|
|
rc = erofs();
|
|
} else if (!IsWindows()) {
|
|
rc = sys_linkat(olddirfd, oldpath, newdirfd, newpath, flags);
|
|
} else {
|
|
rc = sys_linkat_nt(olddirfd, oldpath, newdirfd, newpath);
|
|
}
|
|
STRACE("linkat(%s, %#s, %s, %#s, %#b) → %d% m", DescribeDirfd(olddirfd),
|
|
oldpath, DescribeDirfd(newdirfd), newpath, flags, rc);
|
|
return rc;
|
|
}
|