| /* |
| * Copyright (C) 2017 The Android Open Source Project |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions |
| * are met: |
| * * Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * * Redistributions in binary form must reproduce the above copyright |
| * notice, this list of conditions and the following disclaimer in |
| * the documentation and/or other materials provided with the |
| * distribution. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS |
| * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT |
| * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS |
| * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE |
| * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, |
| * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, |
| * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS |
| * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED |
| * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, |
| * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT |
| * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
| * SUCH DAMAGE. |
| */ |
| |
| #pragma once |
| |
| /** |
| * @file bits/wait.h |
| * @brief Process exit status macros. |
| */ |
| |
| #include <sys/cdefs.h> |
| |
| #include <linux/wait.h> |
| |
| /** Returns the exit status from a process for which `WIFEXITED` is true. */ |
| #define WEXITSTATUS(__status) (((__status) & 0xff00) >> 8) |
| |
| /** Returns true if a process dumped core. */ |
| #define WCOREDUMP(__status) ((__status) & 0x80) |
| |
| /** Returns the terminating signal from a process, or 0 if it exited normally. */ |
| #define WTERMSIG(__status) ((__status) & 0x7f) |
| |
| /** Returns the signal that stopped the process, if `WIFSTOPPED` is true. */ |
| #define WSTOPSIG(__status) WEXITSTATUS(__status) |
| |
| /** Returns true if the process exited normally. */ |
| #define WIFEXITED(__status) (WTERMSIG(__status) == 0) |
| |
| /** Returns true if the process was stopped by a signal. */ |
| #define WIFSTOPPED(__status) (((__status) & 0xff) == 0x7f) |
| |
| /** Returns true if the process was terminated by a signal. */ |
| #define WIFSIGNALED(__status) (WTERMSIG((__status)+1) >= 2) |
| |
| /** Returns true if the process was resumed . */ |
| #define WIFCONTINUED(__status) ((__status) == 0xffff) |
| |
| /** Constructs a status value from the given exit code and signal number. */ |
| #define W_EXITCODE(__exit_code, __signal_number) ((__exit_code) << 8 | (__signal_number)) |
| |
| /** Constructs a status value for a process stopped by the given signal. */ |
| #define W_STOPCODE(__signal_number) ((__signal_number) << 8 | 0x7f) |
