mirror of
https://sourceware.org/git/glibc.git
synced 2024-11-27 15:30:07 +00:00
136 lines
4.6 KiB
C
136 lines
4.6 KiB
C
/* Copyright (C) 1993, 1997, 2001, 2002, 2011 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, write to the Free
|
|
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
|
|
02111-1307 USA.
|
|
|
|
As a special exception, if you link the code in this file with
|
|
files compiled with a GNU compiler to produce an executable,
|
|
that does not cause the resulting executable to be covered by
|
|
the GNU Lesser General Public License. This exception does not
|
|
however invalidate any other reasons why the executable file
|
|
might be covered by the GNU Lesser General Public License.
|
|
This exception applies to code released by its copyright holders
|
|
in files containing the exception. */
|
|
|
|
/*
|
|
Copyright (C) 1990 The Regents of the University of California.
|
|
All rights reserved.
|
|
|
|
Redistribution and use in source and binary forms, with or without
|
|
modification, are permitted provided that the following conditions
|
|
are met:
|
|
|
|
1. Redistributions of source code must retain the above copyright
|
|
notice, this list of conditions and the following disclaimer.
|
|
2. Redistributions in binary form must reproduce the above copyright
|
|
notice, this list of conditions and the following disclaimer in the
|
|
documentation and/or other materials provided with the distribution.
|
|
4. Neither the name of the University nor the names of its contributors
|
|
may be used to endorse or promote products derived from this software
|
|
without specific prior written permission.
|
|
|
|
THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
|
|
ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
|
|
FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
SUCH DAMAGE.*/
|
|
|
|
/* Modified for GNU iostream by Per Bothner 1991, 1992. */
|
|
|
|
#ifndef _POSIX_SOURCE
|
|
# define _POSIX_SOURCE
|
|
#endif
|
|
#include "libioP.h"
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#ifdef __STDC__
|
|
#include <stdlib.h>
|
|
#include <unistd.h>
|
|
#endif
|
|
|
|
#ifdef _LIBC
|
|
# undef isatty
|
|
# define isatty(Fd) __isatty (Fd)
|
|
|
|
# include <device-nrs.h>
|
|
#endif
|
|
|
|
|
|
static int
|
|
local_isatty (int fd)
|
|
{
|
|
int save_errno = errno;
|
|
int res = isatty (fd);
|
|
__set_errno (save_errno);
|
|
return res;
|
|
}
|
|
|
|
|
|
/*
|
|
* Allocate a file buffer, or switch to unbuffered I/O.
|
|
* Per the ANSI C standard, ALL tty devices default to line buffered.
|
|
*
|
|
* As a side effect, we set __SOPT or __SNPT (en/dis-able fseek
|
|
* optimisation) right after the _fstat() that finds the buffer size.
|
|
*/
|
|
|
|
int
|
|
_IO_file_doallocate (fp)
|
|
_IO_FILE *fp;
|
|
{
|
|
_IO_size_t size;
|
|
char *p;
|
|
struct _G_stat64 st;
|
|
|
|
#ifndef _LIBC
|
|
/* If _IO_cleanup_registration_needed is non-zero, we should call the
|
|
function it points to. This is to make sure _IO_cleanup gets called
|
|
on exit. We call it from _IO_file_doallocate, since that is likely
|
|
to get called by any program that does buffered I/O. */
|
|
if (__builtin_expect (_IO_cleanup_registration_needed != NULL, 0))
|
|
(*_IO_cleanup_registration_needed) ();
|
|
#endif
|
|
|
|
size = _IO_BUFSIZ;
|
|
if (fp->_fileno >= 0 && __builtin_expect (_IO_SYSSTAT (fp, &st), 0) >= 0)
|
|
{
|
|
if (S_ISCHR (st.st_mode))
|
|
{
|
|
/* Possibly a tty. */
|
|
if (
|
|
#ifdef DEV_TTY_P
|
|
DEV_TTY_P (&st) ||
|
|
#endif
|
|
local_isatty (fp->_fileno))
|
|
fp->_flags |= _IO_LINE_BUF;
|
|
}
|
|
#if _IO_HAVE_ST_BLKSIZE
|
|
if (st.st_blksize > 0)
|
|
size = st.st_blksize;
|
|
#endif
|
|
}
|
|
ALLOC_BUF (p, size, EOF);
|
|
INTUSE(_IO_setb) (fp, p, p + size, 1);
|
|
return 1;
|
|
}
|
|
INTDEF(_IO_file_doallocate)
|