1 //===-- Linux implementation of pipe --------------------------------------===// 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-exception 6 // 7 //===----------------------------------------------------------------------===// 8 9 #include "src/unistd/pipe2.h" 10 11 #include "src/__support/OSUtil/syscall.h" // For internal syscall function. 12 #include "src/__support/common.h" 13 #include "src/__support/macros/config.h" 14 #include "src/errno/libc_errno.h" 15 #include <sys/syscall.h> // For syscall numbers. 16 17 namespace LIBC_NAMESPACE_DECL { 18 19 LLVM_LIBC_FUNCTION(int, pipe2, (int pipefd[2], int flags)) { 20 int ret = LIBC_NAMESPACE::syscall_impl<int>( 21 SYS_pipe2, reinterpret_cast<long>(pipefd), flags); 22 if (ret < 0) { 23 libc_errno = -ret; 24 return -1; 25 } 26 MSAN_UNPOISON(pipefd, sizeof(int) * 2); 27 return ret; 28 } 29 30 } // namespace LIBC_NAMESPACE_DECL 31