163 lines
6.0 KiB
C
163 lines
6.0 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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/**
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* @file sys/uio.h
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* @brief Multi-buffer ("vector") I/O operations using `struct iovec`.
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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/uio.h>
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__BEGIN_DECLS
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/**
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* [readv(2)](http://man7.org/linux/man-pages/man2/readv.2.html) reads
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* from an fd into the `__count` buffers described by `__iov`.
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*
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* Returns the number of bytes read on success,
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* and returns -1 and sets `errno` on failure.
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*/
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ssize_t readv(int __fd, const struct iovec* __iov, int __count);
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/**
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* [writev(2)](http://man7.org/linux/man-pages/man2/writev.2.html) writes
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* to an fd from the `__count` buffers described by `__iov`.
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*
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* Returns the number of bytes written on success,
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* and returns -1 and sets `errno` on failure.
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*/
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ssize_t writev(int __fd, const struct iovec* __iov, int __count);
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#if defined(__USE_GNU)
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/**
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* [preadv(2)](http://man7.org/linux/man-pages/man2/preadv.2.html) reads
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* from an fd into the `__count` buffers described by `__iov`, starting at
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* offset `__offset` into the file.
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*
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* Returns the number of bytes read on success,
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* and returns -1 and sets `errno` on failure.
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*
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* Available since API level 24.
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*/
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ssize_t preadv(int __fd, const struct iovec* __iov, int __count, off_t __offset) __RENAME_IF_FILE_OFFSET64(preadv64) __INTRODUCED_IN(24);
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/**
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* [pwritev(2)](http://man7.org/linux/man-pages/man2/pwritev.2.html) writes
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* to an fd from the `__count` buffers described by `__iov`, starting at offset
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* `__offset` into the file.
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*
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* Returns the number of bytes written on success,
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* and returns -1 and sets `errno` on failure.
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*
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* Available since API level 24.
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*/
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ssize_t pwritev(int __fd, const struct iovec* __iov, int __count, off_t __offset) __RENAME_IF_FILE_OFFSET64(pwritev64) __INTRODUCED_IN(24);
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/**
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* Like preadv() but with a 64-bit offset even in a 32-bit process.
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*
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* Available since API level 24.
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*/
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ssize_t preadv64(int __fd, const struct iovec* __iov, int __count, off64_t __offset) __INTRODUCED_IN(24);
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/**
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* Like pwritev() but with a 64-bit offset even in a 32-bit process.
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*
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* Available since API level 24.
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*/
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ssize_t pwritev64(int __fd, const struct iovec* __iov, int __count, off64_t __offset) __INTRODUCED_IN(24);
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/**
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* [preadv2(2)](http://man7.org/linux/man-pages/man2/preadv2.2.html) reads
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* from an fd into the `__count` buffers described by `__iov`, starting at
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* offset `__offset` into the file, with the given flags.
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*
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* Returns the number of bytes read on success,
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* and returns -1 and sets `errno` on failure.
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*
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* Available since API level 33.
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*/
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ssize_t preadv2(int __fd, const struct iovec* __iov, int __count, off_t __offset, int __flags) __RENAME_IF_FILE_OFFSET64(preadv64v2) __INTRODUCED_IN(33);
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/**
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* [pwritev2(2)](http://man7.org/linux/man-pages/man2/pwritev2.2.html) writes
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* to an fd from the `__count` buffers described by `__iov`, starting at offset
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* `__offset` into the file, with the given flags.
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*
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* Returns the number of bytes written on success,
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* and returns -1 and sets `errno` on failure.
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*
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* Available since API level 33.
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*/
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ssize_t pwritev2(int __fd, const struct iovec* __iov, int __count, off_t __offset, int __flags) __RENAME_IF_FILE_OFFSET64(pwritev64v2) __INTRODUCED_IN(33);
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/**
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* Like preadv2() but with a 64-bit offset even in a 32-bit process.
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*
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* Available since API level 33.
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*/
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ssize_t preadv64v2(int __fd, const struct iovec* __iov, int __count, off64_t __offset, int __flags) __INTRODUCED_IN(33);
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/**
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* Like pwritev2() but with a 64-bit offset even in a 32-bit process.
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*
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* Available since API level 33.
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*/
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ssize_t pwritev64v2(int __fd, const struct iovec* __iov, int __count, off64_t __offset, int __flags) __INTRODUCED_IN(33);
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/**
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* [process_vm_readv(2)](http://man7.org/linux/man-pages/man2/process_vm_readv.2.html)
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* reads from the address space of another process.
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*
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* Returns the number of bytes read on success,
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* and returns -1 and sets `errno` on failure.
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*
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* Available since API level 23.
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*/
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ssize_t process_vm_readv(pid_t __pid, const struct iovec* __local_iov, unsigned long __local_iov_count, const struct iovec* __remote_iov, unsigned long __remote_iov_count, unsigned long __flags) __INTRODUCED_IN(23);
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/**
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* [process_vm_writev(2)](http://man7.org/linux/man-pages/man2/process_vm_writev.2.html)
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* writes to the address space of another process.
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*
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* Returns the number of bytes read on success,
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* and returns -1 and sets `errno` on failure.
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*
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* Available since API level 23.
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*/
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ssize_t process_vm_writev(pid_t __pid, const struct iovec* __local_iov, unsigned long __local_iov_count, const struct iovec* __remote_iov, unsigned long __remote_iov_count, unsigned long __flags) __INTRODUCED_IN(23);
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#endif
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__END_DECLS
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