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/*
* Copyright (C) 2021 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 sys/pidfd.h
* @brief File descriptors representing processes.
*/
#include <sys/cdefs.h>
#include <sys/types.h>
#include <bits/signal_types.h>
__BEGIN_DECLS
/**
* [pidfd_open(2)](https://man7.org/linux/man-pages/man2/pidfd_open.2.html)
* opens a file descriptor that refers to a process. This file descriptor will
* have the close-on-exec flag set by default.
*
* Returns a new file descriptor on success and returns -1 and sets `errno` on
* failure.
*
* Available since API level 31.
*/
int pidfd_open(pid_t __pid, unsigned int __flags) __INTRODUCED_IN(31);
/**
* [pidfd_getfd(2)](https://man7.org/linux/man-pages/man2/pidfd_open.2.html)
* dups a file descriptor from another process. This file descriptor will have
* the close-on-exec flag set by default.
*
* Returns a new file descriptor on success and returns -1 and sets `errno` on
* failure.
*
* Available since API level 31.
*/
int pidfd_getfd(int __pidfd, int __targetfd, unsigned int __flags) __INTRODUCED_IN(31);
/**
* [pidfd_send_signal(2)](https://man7.org/linux/man-pages/man2/pidfd_send_signal.2.html)
* sends a signal to another process.
*
* Returns 0 on success and returns -1 and sets `errno` on failure.
*
* Available since API level 31.
*/
int pidfd_send_signal(int __pidfd, int __sig, siginfo_t *__info, unsigned int __flags) __INTRODUCED_IN(31);
__END_DECLS
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