mirror of
https://sourceware.org/git/glibc.git
synced 2025-10-30 10:45:40 +03:00
37f802f864
__need_FOPEN_MAX wasn't being used anywhere. __need_IOV_MAX was more complicated; the basic deal is that sys/uio.h wants to define a constant named UIO_MAXIOV and bits/xopen_lim.h wants to define a constant named IOV_MAX, with the same meaning. For no apparent reason this was being handled via bits/stdio_lim.h -- stdio.h is NOT supposed to define IOV_MAX -- and some mess in Makerules. Also, bits/uio.h on Linux was being used as a dumping ground for extension functions. So now we have bits/uio_lim.h, which defines __IOV_MAX. bits/xopen_lim.h and sys/uio.h use that to define their respective constants. We also now have bits/uio-ext.h, which is the official Proper Home for extensions to sys/uio.h. bits/uio.h is removed, and stdio_lim.h doesn't define IOV_MAX at all. * bits/uio_lim.h, sysdeps/unix/sysv/linux/bits/uio_lim.h * bits/uio-ext.h, sysdeps/unix/sysv/linux/bits/uio-ext.h: New file. * bits/uio.h, sysdeps/unix/sysv/linux/bits/uio.h: Delete file. * include/bits/xopen_lim.h: Use bits/uio_lim.h to get the value for IOV_MAX. * misc/Makefile: Install bits/uio-ext.h and bits/uio_lim.h. Don't install bits/uio.h. * misc/sys/uio.h: Don't include bits/uio.h. Do include bits/types/struct_iovec.h and bits/uio_lim.h. Set UIO_MAXIOV based on __IOV_MAX. Under __USE_GNU, also include bits/uio-ext.h. * stdio-common/stdio_lim.h.in: Remove logic for __need_FOPEN_MAX and __need_IOV_MAX. Don't define IOV_MAX at all. * Makerules (stdio_lim.h): Remove logic for setting IOV_MAX. * sysdeps/unix/sysv/linux/bits/fcntl-linux.h: Include bits/types/struct_iovec.h, not bits/uio.h. Use __ssize_t, not ssize_t, in function prototypes. Don't use hard TAB for double space after period in comments.
172 lines
6.1 KiB
C
172 lines
6.1 KiB
C
/* Copyright (C) 1991-2017 Free Software Foundation, Inc.
|
|
This file is part of the GNU C Library.
|
|
|
|
The GNU C Library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU Lesser General Public
|
|
License as published by the Free Software Foundation; either
|
|
version 2.1 of the License, or (at your option) any later version.
|
|
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
Lesser General Public License for more details.
|
|
|
|
You should have received a copy of the GNU Lesser General Public
|
|
License along with the GNU C Library; if not, see
|
|
<http://www.gnu.org/licenses/>. */
|
|
|
|
#ifndef _SYS_UIO_H
|
|
#define _SYS_UIO_H 1
|
|
|
|
#include <features.h>
|
|
#include <sys/types.h>
|
|
#include <bits/types/struct_iovec.h>
|
|
#include <bits/uio_lim.h>
|
|
#ifdef __IOV_MAX
|
|
# define UIO_MAXIOV __IOV_MAX
|
|
#else
|
|
# undef UIO_MAXIOV
|
|
#endif
|
|
|
|
__BEGIN_DECLS
|
|
|
|
/* Read data from file descriptor FD, and put the result in the
|
|
buffers described by IOVEC, which is a vector of COUNT 'struct iovec's.
|
|
The buffers are filled in the order specified.
|
|
Operates just like 'read' (see <unistd.h>) except that data are
|
|
put in IOVEC instead of a contiguous buffer.
|
|
|
|
This function is a cancellation point and therefore not marked with
|
|
__THROW. */
|
|
extern ssize_t readv (int __fd, const struct iovec *__iovec, int __count)
|
|
__wur;
|
|
|
|
/* Write data pointed by the buffers described by IOVEC, which
|
|
is a vector of COUNT 'struct iovec's, to file descriptor FD.
|
|
The data is written in the order specified.
|
|
Operates just like 'write' (see <unistd.h>) except that the data
|
|
are taken from IOVEC instead of a contiguous buffer.
|
|
|
|
This function is a cancellation point and therefore not marked with
|
|
__THROW. */
|
|
extern ssize_t writev (int __fd, const struct iovec *__iovec, int __count)
|
|
__wur;
|
|
|
|
|
|
#ifdef __USE_MISC
|
|
# ifndef __USE_FILE_OFFSET64
|
|
/* Read data from file descriptor FD at the given position OFFSET
|
|
without change the file pointer, and put the result in the buffers
|
|
described by IOVEC, which is a vector of COUNT 'struct iovec's.
|
|
The buffers are filled in the order specified. Operates just like
|
|
'pread' (see <unistd.h>) except that data are put in IOVEC instead
|
|
of a contiguous buffer.
|
|
|
|
This function is a cancellation point and therefore not marked with
|
|
__THROW. */
|
|
extern ssize_t preadv (int __fd, const struct iovec *__iovec, int __count,
|
|
__off_t __offset) __wur;
|
|
|
|
/* Write data pointed by the buffers described by IOVEC, which is a
|
|
vector of COUNT 'struct iovec's, to file descriptor FD at the given
|
|
position OFFSET without change the file pointer. The data is
|
|
written in the order specified. Operates just like 'pwrite' (see
|
|
<unistd.h>) except that the data are taken from IOVEC instead of a
|
|
contiguous buffer.
|
|
|
|
This function is a cancellation point and therefore not marked with
|
|
__THROW. */
|
|
extern ssize_t pwritev (int __fd, const struct iovec *__iovec, int __count,
|
|
__off_t __offset) __wur;
|
|
|
|
# else
|
|
# ifdef __REDIRECT
|
|
extern ssize_t __REDIRECT (preadv, (int __fd, const struct iovec *__iovec,
|
|
int __count, __off64_t __offset),
|
|
preadv64) __wur;
|
|
extern ssize_t __REDIRECT (pwritev, (int __fd, const struct iovec *__iovec,
|
|
int __count, __off64_t __offset),
|
|
pwritev64) __wur;
|
|
# else
|
|
# define preadv preadv64
|
|
# define pwritev pwritev64
|
|
# endif
|
|
# endif
|
|
|
|
# ifdef __USE_LARGEFILE64
|
|
/* Read data from file descriptor FD at the given position OFFSET
|
|
without change the file pointer, and put the result in the buffers
|
|
described by IOVEC, which is a vector of COUNT 'struct iovec's.
|
|
The buffers are filled in the order specified. Operates just like
|
|
'pread' (see <unistd.h>) except that data are put in IOVEC instead
|
|
of a contiguous buffer.
|
|
|
|
This function is a cancellation point and therefore not marked with
|
|
__THROW. */
|
|
extern ssize_t preadv64 (int __fd, const struct iovec *__iovec, int __count,
|
|
__off64_t __offset) __wur;
|
|
|
|
/* Write data pointed by the buffers described by IOVEC, which is a
|
|
vector of COUNT 'struct iovec's, to file descriptor FD at the given
|
|
position OFFSET without change the file pointer. The data is
|
|
written in the order specified. Operates just like 'pwrite' (see
|
|
<unistd.h>) except that the data are taken from IOVEC instead of a
|
|
contiguous buffer.
|
|
|
|
This function is a cancellation point and therefore not marked with
|
|
__THROW. */
|
|
extern ssize_t pwritev64 (int __fd, const struct iovec *__iovec, int __count,
|
|
__off64_t __offset) __wur;
|
|
# endif
|
|
#endif /* Use misc. */
|
|
|
|
|
|
#ifdef __USE_GNU
|
|
# ifndef __USE_FILE_OFFSET64
|
|
/* Same as preadv but with an additional flag argumenti defined at uio.h. */
|
|
extern ssize_t preadv2 (int __fp, const struct iovec *__iovec, int __count,
|
|
__off_t __offset, int ___flags) __wur;
|
|
|
|
/* Same as preadv but with an additional flag argument defined at uio.h. */
|
|
extern ssize_t pwritev2 (int __fd, const struct iovec *__iodev, int __count,
|
|
__off_t __offset, int __flags) __wur;
|
|
|
|
# else
|
|
# ifdef __REDIRECT
|
|
extern ssize_t __REDIRECT (pwritev2, (int __fd, const struct iovec *__iovec,
|
|
int __count, __off64_t __offset,
|
|
int __flags),
|
|
pwritev64v2) __wur;
|
|
extern ssize_t __REDIRECT (preadv2, (int __fd, const struct iovec *__iovec,
|
|
int __count, __off64_t __offset,
|
|
int __flags),
|
|
preadv64v2) __wur;
|
|
# else
|
|
# define preadv2 preadv64v2
|
|
# define pwritev2 pwritev64v2
|
|
# endif
|
|
# endif
|
|
|
|
# ifdef __USE_LARGEFILE64
|
|
/* Same as preadv but with an additional flag argumenti defined at uio.h. */
|
|
extern ssize_t preadv64v2 (int __fp, const struct iovec *__iovec,
|
|
int __count, __off64_t __offset,
|
|
int ___flags) __wur;
|
|
|
|
/* Same as preadv but with an additional flag argument defined at uio.h. */
|
|
extern ssize_t pwritev64v2 (int __fd, const struct iovec *__iodev,
|
|
int __count, __off64_t __offset,
|
|
int __flags) __wur;
|
|
# endif
|
|
#endif /* Use GNU. */
|
|
|
|
__END_DECLS
|
|
|
|
/* Some operating systems provide system-specific extensions to this
|
|
header. */
|
|
#ifdef __USE_GNU
|
|
# include <bits/uio-ext.h>
|
|
#endif
|
|
|
|
#endif /* sys/uio.h */
|