36 lines · cpp
1//===-- Linux implementation of kill --------------------------------------===//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/signal/kill.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#include "src/signal/linux/signal_utils.h"16 17#include <signal.h>18#include <sys/syscall.h> // For syscall numbers.19 20namespace LIBC_NAMESPACE_DECL {21 22LLVM_LIBC_FUNCTION(int, kill, (pid_t pid, int sig)) {23 int ret = LIBC_NAMESPACE::syscall_impl<int>(SYS_kill, pid, sig);24 25 // A negative return value indicates an error with the magnitude of the26 // value being the error code.27 if (ret != 0) {28 libc_errno = (ret > 0 ? ret : -ret);29 return -1;30 }31 32 return ret; // always 033}34 35} // namespace LIBC_NAMESPACE_DECL36