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