38 lines · cpp
1//===-- Linux implementation of symlink -----------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#include "src/unistd/symlink.h"10 11#include "src/__support/OSUtil/syscall.h" // For internal syscall function.12#include "src/__support/common.h"13#include "src/__support/libc_errno.h"14#include "src/__support/macros/config.h"15 16#include "hdr/fcntl_macros.h"17#include <sys/syscall.h> // For syscall numbers.18 19namespace LIBC_NAMESPACE_DECL {20 21LLVM_LIBC_FUNCTION(int, symlink, (const char *path1, const char *path2)) {22#ifdef SYS_symlink23 int ret = LIBC_NAMESPACE::syscall_impl<int>(SYS_symlink, path1, path2);24#elif defined(SYS_symlinkat)25 int ret =26 LIBC_NAMESPACE::syscall_impl<int>(SYS_symlinkat, path1, AT_FDCWD, path2);27#else28#error "symlink or symlinkat syscalls not available."29#endif30 if (ret < 0) {31 libc_errno = -ret;32 return -1;33 }34 return ret;35}36 37} // namespace LIBC_NAMESPACE_DECL38