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Justine Tunney 2020-06-15 07:18:57 -07:00
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libc/calls/symlink.c Normal file
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney │
│ │
│ This program is free software; you can redistribute it and/or modify │
│ it under the terms of the GNU General Public License as published by │
│ the Free Software Foundation; version 2 of the License. │
│ │
│ This program is distributed in the hope that it will be useful, but │
│ WITHOUT ANY WARRANTY; without even the implied warranty of │
│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
│ General Public License for more details. │
│ │
│ You should have received a copy of the GNU General Public License │
│ along with this program; if not, write to the Free Software │
│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
│ 02110-1301 USA │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/calls/calls.h"
#include "libc/calls/internal.h"
#include "libc/dce.h"
#include "libc/sysv/consts/at.h"
#include "libc/sysv/errfuns.h"
/**
* Creates symbolic link.
*
* This is like link() but adds a tiny indirection to make the fact that
* the file is a link obvious. It also enables certain other features,
* like the ability to be broken.
*
* @param target can be relative and needn't exist
* @param linkpath is what gets created
* @return 0 on success, or -1 w/ errno
* @note Windows NT only lets admins do this
* @asyncsignalsafe
*/
int symlink(const char *target, const char *linkpath) {
if (!target || !linkpath) return efault();
if (!IsWindows()) {
return symlinkat$sysv(target, AT_FDCWD, linkpath);
} else {
return symlink$nt(target, linkpath);
}
}