1 /* 2 * Copyright (C) 2021 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 #pragma once 29 30 /** 31 * @file sys/pidfd.h 32 * @brief File descriptors representing processes. 33 */ 34 35 #include <sys/cdefs.h> 36 #include <sys/types.h> 37 38 #include <bits/signal_types.h> 39 40 __BEGIN_DECLS 41 42 /** 43 * [pidfd_open(2)](https://man7.org/linux/man-pages/man2/pidfd_open.2.html) 44 * opens a file descriptor that refers to a process. This file descriptor will 45 * have the close-on-exec flag set by default. 46 * 47 * Returns a new file descriptor on success and returns -1 and sets `errno` on 48 * failure. 49 * 50 * Available since API level 31. 51 */ 52 int pidfd_open(pid_t __pid, unsigned int __flags) __INTRODUCED_IN(31); 53 54 /** 55 * [pidfd_getfd(2)](https://man7.org/linux/man-pages/man2/pidfd_open.2.html) 56 * dups a file descriptor from another process. This file descriptor will have 57 * the close-on-exec flag set by default. 58 * 59 * Returns a new file descriptor on success and returns -1 and sets `errno` on 60 * failure. 61 * 62 * Available since API level 31. 63 */ 64 int pidfd_getfd(int __pidfd, int __targetfd, unsigned int __flags) __INTRODUCED_IN(31); 65 66 /** 67 * [pidfd_send_signal(2)](https://man7.org/linux/man-pages/man2/pidfd_send_signal.2.html) 68 * sends a signal to another process. 69 * 70 * Returns 0 on success and returns -1 and sets `errno` on failure. 71 * 72 * Available since API level 31. 73 */ 74 int pidfd_send_signal(int __pidfd, int __sig, siginfo_t *__info, unsigned int __flags) __INTRODUCED_IN(31); 75 76 __END_DECLS 77