18989aa00SSiva Chandra Reddy //===-- Linux implementation of dup3 --------------------------------------===// 28989aa00SSiva Chandra Reddy // 38989aa00SSiva Chandra Reddy // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. 48989aa00SSiva Chandra Reddy // See https://llvm.org/LICENSE.txt for license information. 58989aa00SSiva Chandra Reddy // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception 68989aa00SSiva Chandra Reddy // 78989aa00SSiva Chandra Reddy //===----------------------------------------------------------------------===// 88989aa00SSiva Chandra Reddy 98989aa00SSiva Chandra Reddy #include "src/unistd/dup3.h" 108989aa00SSiva Chandra Reddy 118989aa00SSiva Chandra Reddy #include "src/__support/OSUtil/syscall.h" // For internal syscall function. 128989aa00SSiva Chandra Reddy #include "src/__support/common.h" 138989aa00SSiva Chandra Reddy 14*5ff3ff33SPetr Hosek #include "src/__support/macros/config.h" 15803437dbSMichael Jones #include "src/errno/libc_errno.h" 168989aa00SSiva Chandra Reddy #include <sys/syscall.h> // For syscall numbers. 178989aa00SSiva Chandra Reddy 18*5ff3ff33SPetr Hosek namespace LIBC_NAMESPACE_DECL { 198989aa00SSiva Chandra Reddy 208989aa00SSiva Chandra Reddy LLVM_LIBC_FUNCTION(int, dup3, (int oldfd, int newfd, int flags)) { 218989aa00SSiva Chandra Reddy // If dup2 syscall is available, we make use of directly. 22b6bc9d72SGuillaume Chatelet int ret = LIBC_NAMESPACE::syscall_impl<int>(SYS_dup3, oldfd, newfd, flags); 238989aa00SSiva Chandra Reddy if (ret >= 0) 248989aa00SSiva Chandra Reddy return ret; 25204587a3SSiva Chandra Reddy libc_errno = -ret; 268989aa00SSiva Chandra Reddy return -1; 278989aa00SSiva Chandra Reddy } 288989aa00SSiva Chandra Reddy 29*5ff3ff33SPetr Hosek } // namespace LIBC_NAMESPACE_DECL 30