Remove __need_IOV_MAX and __need_FOPEN_MAX.

__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.

1 files changed, 0 insertions, 78 deletions

diff --git a/sysdeps/unix/sysv/linux/bits/uio.h b/sysdeps/unix/sysv/linux/bits/uio.h
deleted file mode 100644
index d5701f8171..0000000000
--- a/sysdeps/unix/sysv/linux/bits/uio.h
+++ /dev/null
@@ -1,78 +0,0 @@
-/* Copyright (C) 1996-2017 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/>.  */
-
-#if !defined _SYS_UIO_H && !defined _FCNTL_H
-# error "Never include <bits/uio.h> directly; use <sys/uio.h> instead."
-#endif
-
-#ifndef _BITS_UIO_H
-#define _BITS_UIO_H	1
-
-#include <sys/types.h>
-
-
-/* We should normally use the Linux kernel header file to define this
-   type and macros but this calls for trouble because of the header
-   includes other kernel headers.  */
-
-/* Size of object which can be written atomically.
-
-   This macro has different values in different kernel versions.  The
-   latest versions of the kernel use 1024 and this is good choice.  Since
-   the C library implementation of readv/writev is able to emulate the
-   functionality even if the currently running kernel does not support
-   this large value the readv/writev call will not fail because of this.  */
-#define UIO_MAXIOV	1024
-
-
-#include <bits/types/struct_iovec.h>
-
-#endif
-
-
-#ifdef __USE_GNU
-# if defined _SYS_UIO_H && !defined _BITS_UIO_H_FOR_SYS_UIO_H
-#  define _BITS_UIO_H_FOR_SYS_UIO_H 1
-
-__BEGIN_DECLS
-
-/* Read from another process' address space.  */
-extern ssize_t process_vm_readv (pid_t __pid, const struct iovec *__lvec,
-				 unsigned long int __liovcnt,
-				 const struct iovec *__rvec,
-				 unsigned long int __riovcnt,
-				 unsigned long int __flags)
-  __THROW;
-
-/* Write to another process' address space.  */
-extern ssize_t process_vm_writev (pid_t __pid, const struct iovec *__lvec,
-				  unsigned long int __liovcnt,
-				  const struct iovec *__rvec,
-				  unsigned long int __riovcnt,
-				  unsigned long int __flags)
-  __THROW;
-
-__END_DECLS
-
-# endif
-
-/* Flags for preadv2/pwritev2: */
-#define RWF_HIPRI	0x00000001 /* High priority request.  */
-#define RWF_DSYNC	0x00000002 /* per-IO O_DSYNC.  */
-#define RWF_SYNC	0x00000004 /* per-IO O_SYNC.  */
-
-#endif