09e77f35ab
On Android, fcntl is always implemented by fcntl64(2). This means that an LP32 binary can `fcntl(F_SETLK, struct flock)` (because fcntl64(2) passes through to the 32-bit fcntl(2) to handle F_SETLK), and it can also `fcntl(F_SETLK64, struct flock64)`. What it can't do before this patch is set _FILE_OFFSET_BITS=64 and then `fcntl(F_SETLK, struct flock)` where that `struct flock` is actually implicitly `struct flock64`. Move the kernel uapi structs out of the way, define them ourselves based on __LP64__ and _FILE_OFFSET_BITS, and fix up the relevant F_ constants. (Also add a .clang-format to turn off clang-format in libc/include/.) Bug: N/A Test: treehugger (and strace!) Change-Id: Iccd6c83d9133e1efcf93a7b49a6ae0f1bbd3d58b
254 lines
7.9 KiB
C
254 lines
7.9 KiB
C
/*
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* Copyright (C) 2008 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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#define _FCNTL_H
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/**
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* @file fcntl.h
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* @brief File control operations.
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*/
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#include <sys/cdefs.h>
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#include <sys/types.h>
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#include <linux/fadvise.h>
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#include <linux/falloc.h>
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#include <linux/fcntl.h>
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#include <linux/stat.h>
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#include <linux/uio.h>
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#include <bits/fcntl.h>
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#include <bits/seek_constants.h>
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#if defined(__USE_GNU) || defined(__USE_BSD)
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#include <bits/lockf.h>
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#endif
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__BEGIN_DECLS
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#if defined(__LP64__)
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/* LP64 kernels don't have F_*64 defines because their flock is 64-bit. */
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/** Flag for flock(). */
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#define F_GETLK64 F_GETLK
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/** Flag for flock(). */
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#define F_SETLK64 F_SETLK
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/** Flag for flock(). */
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#define F_SETLKW64 F_SETLKW
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#elif defined(__USE_FILE_OFFSET64)
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/* For _FILE_OFFSET_BITS=64, redirect the constants to the off64_t variants. */
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#undef F_GETLK
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#undef F_SETLK
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#undef F_SETLKW
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/** Flag for flock(). */
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#define F_GETLK F_GETLK64
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/** Flag for flock(). */
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#define F_SETLK F_SETLK64
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/** Flag for flock(). */
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#define F_SETLKW F_SETLKW64
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#endif
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/** Flag for open(). */
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#define O_ASYNC FASYNC
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/** Flag for open(). */
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#define O_RSYNC O_SYNC
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#if __ANDROID_API__ >= 21
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/** Flag for splice(). */
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#define SPLICE_F_MOVE 1
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/** Flag for splice(). */
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#define SPLICE_F_NONBLOCK 2
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/** Flag for splice(). */
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#define SPLICE_F_MORE 4
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/** Flag for splice(). */
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#define SPLICE_F_GIFT 8
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#endif
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#if __ANDROID_API__ >= 26
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/** Flag for sync_file_range(). */
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#define SYNC_FILE_RANGE_WAIT_BEFORE 1
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/** Flag for sync_file_range(). */
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#define SYNC_FILE_RANGE_WRITE 2
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/** Flag for sync_file_range(). */
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#define SYNC_FILE_RANGE_WAIT_AFTER 4
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#endif
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/**
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* [creat(2)](http://man7.org/linux/man-pages/man2/creat.2.html)
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* creates a file.
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*
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* Returns a new file descriptor on success and returns -1 and sets `errno` on
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* failure.
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*/
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int creat(const char* __path, mode_t __mode);
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/** See creat(). */
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int creat64(const char* __path, mode_t __mode) __INTRODUCED_IN(21);
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/**
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* [openat(2)](http://man7.org/linux/man-pages/man2/openat.2.html)
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* opens (and possibly creates) a file.
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*
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* Returns a new file descriptor on success and returns -1 and sets `errno` on
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* failure.
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*/
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int openat(int __dir_fd, const char* __path, int __flags, ...);
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/** See openat(). */
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int openat64(int __dir_fd, const char* __path, int __flags, ...) __INTRODUCED_IN(21);
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/**
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* [open(2)](http://man7.org/linux/man-pages/man2/open.2.html)
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* opens (and possibly creates) a file.
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*
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* Returns a new file descriptor on success and returns -1 and sets `errno` on
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* failure.
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*/
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int open(const char* __path, int __flags, ...);
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/** See open(). */
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int open64(const char* __path, int __flags, ...) __INTRODUCED_IN(21);
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/**
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* [splice(2)](http://man7.org/linux/man-pages/man2/splice.2.html)
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* splices data to/from a pipe.
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*
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* Valid flags are `SPLICE_F_MOVE`, `SPLICE_F_NONBLOCK`, `SPLICE_F_MORE`, and
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* `SPLICE_F_GIFT`.
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*
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* Returns the number of bytes spliced on success and returns -1 and sets
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* `errno` on failure.
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*
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* Available since API level 21.
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*/
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ssize_t splice(int __in_fd, off64_t* __in_offset, int __out_fd, off64_t* __out_offset, size_t __length, unsigned int __flags) __INTRODUCED_IN(21);
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/**
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* [tee(2)](http://man7.org/linux/man-pages/man2/tee.2.html)
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* duplicates data from one pipe to another.
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*
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* Valid flags are `SPLICE_F_MOVE`, `SPLICE_F_NONBLOCK`, `SPLICE_F_MORE`, and
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* `SPLICE_F_GIFT`.
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*
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* Returns the number of bytes duplicated on success and returns -1 and sets
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* `errno` on failure.
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*
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* Available since API level 21.
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*/
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ssize_t tee(int __in_fd, int __out_fd, size_t __length, unsigned int __flags) __INTRODUCED_IN(21);
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/**
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* [vmsplice(2)](http://man7.org/linux/man-pages/man2/vmsplice.2.html)
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* splices data to/from a pipe.
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*
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* Valid flags are `SPLICE_F_MOVE`, `SPLICE_F_NONBLOCK`, `SPLICE_F_MORE`, and
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* `SPLICE_F_GIFT`.
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*
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* Returns the number of bytes spliced on success and returns -1 and sets
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* `errno` on failure.
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*
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* Available since API level 21.
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*/
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ssize_t vmsplice(int __fd, const struct iovec* __iov, size_t __count, unsigned int __flags) __INTRODUCED_IN(21);
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/**
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* [fallocate(2)](http://man7.org/linux/man-pages/man2/fallocate.2.html)
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* is a Linux-specific extension of posix_fallocate().
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*
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* Valid flags are `FALLOC_FL_KEEP_SIZE`, `FALLOC_FL_PUNCH_HOLE`,
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* `FALLOC_FL_NO_HIDE_STALE`, `FALLOC_FL_COLLAPSE_RANGE`,
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* `FALLOC_FL_ZERO_RANGE`, `FALLOC_FL_INSERT_RANGE`, and
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* `FALLOC_FL_UNSHARE_RANGE`.
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*
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* Returns 0 on success and returns -1 and sets `errno` on failure.
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*
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* Available since API level 21.
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*/
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int fallocate(int __fd, int __mode, off_t __offset, off_t __length) __RENAME_IF_FILE_OFFSET64(fallocate64) __INTRODUCED_IN(21);
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/** See fallocate(). */
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int fallocate64(int __fd, int __mode, off64_t __offset, off64_t __length) __INTRODUCED_IN(21);
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/**
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* [posix_fadvise(2)](http://man7.org/linux/man-pages/man2/posix_fadvise.2.html)
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* declares an expected access pattern for file data.
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*
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* Valid flags are `POSIX_FADV_NORMAL`, `POSIX_FADV_RANDOM`,
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* `POSIX_FADV_SEQUENTIAL`, `POSIX_FADV_WILLNEED`, `POSIX_FADV_DONTNEED`,
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* and `POSIX_FADV_NOREUSE`.
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*
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* Returns 0 on success and returns an error number on failure.
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*
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* Available since API level 21.
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*/
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int posix_fadvise(int __fd, off_t __offset, off_t __length, int __advice) __RENAME_IF_FILE_OFFSET64(posix_fadvise64) __INTRODUCED_IN(21);
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/** See posix_fadvise(). */
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int posix_fadvise64(int __fd, off64_t __offset, off64_t __length, int __advice) __INTRODUCED_IN(21);
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/**
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* [posix_fallocate(2)](http://man7.org/linux/man-pages/man2/posix_fallocate.2.html)
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* allocates file space.
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*
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* Returns 0 on success and returns an error number on failure.
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*
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* Available since API level 21.
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*/
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int posix_fallocate(int __fd, off_t __offset, off_t __length) __RENAME_IF_FILE_OFFSET64(posix_fallocate64) __INTRODUCED_IN(21);
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/** See posix_fallocate(). */
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int posix_fallocate64(int __fd, off64_t __offset, off64_t __length) __INTRODUCED_IN(21);
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#if defined(__USE_GNU)
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/**
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* [readahead(2)](http://man7.org/linux/man-pages/man2/readahead.2.html)
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* initiates readahead for the given file.
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*
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* Returns 0 on success and returns -1 and sets `errno` on failure.
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*/
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ssize_t readahead(int __fd, off64_t __offset, size_t __length);
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/**
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* [sync_file_range(2)](http://man7.org/linux/man-pages/man2/sync_file_range.2.html)
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* syncs part of a file with disk.
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*
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* Valid flags are `SYNC_FILE_RANGE_WAIT_BEFORE`, `SYNC_FILE_RANGE_WRITE`, and
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* `SYNC_FILE_RANGE_WAIT_AFTER`.
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*
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* Returns 0 on success and returns -1 and sets `errno` on failure.
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*/
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int sync_file_range(int __fd, off64_t __offset, off64_t __length, unsigned int __flags) __INTRODUCED_IN(26);
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#endif
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#if defined(__BIONIC_INCLUDE_FORTIFY_HEADERS)
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#include <bits/fortify/fcntl.h>
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#endif
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__END_DECLS
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