30 lines · cpp
1//===-- Linux implementation of getsid-------------------------------------===//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/getsid.h"10 11#include "hdr/types/pid_t.h"12#include "src/__support/OSUtil/syscall.h" // For internal syscall function.13#include "src/__support/common.h"14#include "src/__support/libc_errno.h"15#include "src/__support/macros/config.h"16#include <sys/syscall.h> // For syscall numbers.17 18namespace LIBC_NAMESPACE_DECL {19 20LLVM_LIBC_FUNCTION(pid_t, getsid, (pid_t pid)) {21 pid_t ret = LIBC_NAMESPACE::syscall_impl<pid_t>(SYS_getsid, pid);22 if (ret < 0) {23 libc_errno = static_cast<int>(-ret);24 return -1;25 }26 return ret;27}28 29} // namespace LIBC_NAMESPACE_DECL30