1 /* 2 * Copyright (C) 2017 The Android Open Source Project 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the 13 * distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 29 #pragma once 30 31 /** 32 * @file bits/wait.h 33 * @brief Process exit status macros. 34 */ 35 36 #include <sys/cdefs.h> 37 38 #include <linux/wait.h> 39 40 /** Returns the exit status from a process for which `WIFEXITED` is true. */ 41 #define WEXITSTATUS(__status) (((__status) & 0xff00) >> 8) 42 43 /** Returns true if a process dumped core. */ 44 #define WCOREDUMP(__status) ((__status) & 0x80) 45 46 /** Returns the terminating signal from a process, or 0 if it exited normally. */ 47 #define WTERMSIG(__status) ((__status) & 0x7f) 48 49 /** Returns the signal that stopped the process, if `WIFSTOPPED` is true. */ 50 #define WSTOPSIG(__status) WEXITSTATUS(__status) 51 52 /** Returns true if the process exited normally. */ 53 #define WIFEXITED(__status) (WTERMSIG(__status) == 0) 54 55 /** Returns true if the process was stopped by a signal. */ 56 #define WIFSTOPPED(__status) (WTERMSIG(__status) == 0x7f) 57 58 /** Returns true if the process was terminated by a signal. */ 59 #define WIFSIGNALED(__status) (WTERMSIG((__status)+1) >= 2) 60 61 /** Returns true if the process was resumed . */ 62 #define WIFCONTINUED(__status) ((__status) == 0xffff) 63 64 /** Constructs a status value from the given exit code and signal number. */ 65 #define W_EXITCODE(__exit_code, __signal_number) ((__exit_code) << 8 | (__signal_number)) 66 67 /** Constructs a status value for a process stopped by the given signal. */ 68 #define W_STOPCODE(__signal_number) ((__signal_number) << 8 | 0x7f) 69