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e11fa30791
This way complex runtime features (e.g. ftrace, symbol tables) can always yoink zipos support. This is important now that apelink.com automates embedding symbol tables for multiple cpus.
58 lines
3.2 KiB
C
58 lines
3.2 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 2021 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/calls.h"
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#include "libc/calls/syscall-nt.internal.h"
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#include "libc/calls/syscall-sysv.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/errfuns.h"
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#include "libc/runtime/zipos.internal.h"
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/**
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* Creates hard filesystem link.
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*
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* This allows two names to point to the same file data on disk. They
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* can only be differentiated by examining the inode number.
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*
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* @param flags can have AT_EMPTY_PATH or AT_SYMLINK_NOFOLLOW
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* @return 0 on success, or -1 w/ errno
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* @asyncsignalsafe
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*/
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int linkat(int olddirfd, const char *oldpath, int newdirfd, const char *newpath,
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int flags) {
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int rc;
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if (IsAsan() &&
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(!__asan_is_valid_str(oldpath) || !__asan_is_valid_str(newpath))) {
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rc = efault();
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} else if (_weaken(__zipos_notat) &&
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((rc = __zipos_notat(olddirfd, oldpath)) == -1 ||
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(rc = __zipos_notat(newdirfd, newpath)) == -1)) {
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STRACE("zipos fchownat not supported yet");
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} else if (!IsWindows()) {
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rc = sys_linkat(olddirfd, oldpath, newdirfd, newpath, flags);
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} else {
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rc = sys_linkat_nt(olddirfd, oldpath, newdirfd, newpath);
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}
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STRACE("linkat(%s, %#s, %s, %#s, %#b) → %d% m", DescribeDirfd(olddirfd),
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oldpath, DescribeDirfd(newdirfd), newpath, flags, rc);
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return rc;
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}
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