3eea0202cd
* filedoalloc.c, floatio.h, iovfprintf.c, iovfscanf.c: Remove
advertising clause from BSD license, pursuant with
ftp://ftp.cs.berkeley.edu/pub/4bsd/README.Impt.License.Change
From-SVN: r30947
121 lines
4.3 KiB
C
121 lines
4.3 KiB
C
/* Copyright (C) 1993, 1997 Free Software Foundation, Inc.
|
|
This file is part of the GNU IO Library.
|
|
|
|
This library is free software; you can redistribute it and/or
|
|
modify it under the terms of the GNU General Public License as
|
|
published by the Free Software Foundation; either version 2, or (at
|
|
your option) any later version.
|
|
|
|
This 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
|
|
General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this library; see the file COPYING. If not, write to
|
|
the Free Software Foundation, 59 Temple Place - Suite 330, Boston,
|
|
MA 02111-1307, USA.
|
|
|
|
As a special exception, if you link this library with files
|
|
compiled with a GNU compiler to produce an executable, this does
|
|
not cause the resulting executable to be covered by the GNU General
|
|
Public License. This exception does not however invalidate any
|
|
other reasons why the executable file might be covered by the GNU
|
|
General Public License. */
|
|
|
|
/*
|
|
* 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.
|
|
* 3. [rescinded 22 July 1999]
|
|
* 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. */
|
|
|
|
#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)
|
|
#endif
|
|
|
|
/*
|
|
* 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;
|
|
int couldbetty;
|
|
char *p;
|
|
struct stat st;
|
|
|
|
#if !defined(_LIBC) && !defined(__linux__)
|
|
/* 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 (_IO_cleanup_registration_needed)
|
|
(*_IO_cleanup_registration_needed) ();
|
|
#endif
|
|
|
|
if (fp->_fileno < 0 || _IO_SYSSTAT (fp, &st) < 0)
|
|
{
|
|
couldbetty = 0;
|
|
size = _IO_BUFSIZ;
|
|
#if 0
|
|
/* do not try to optimise fseek() */
|
|
fp->_flags |= __SNPT;
|
|
#endif
|
|
}
|
|
else
|
|
{
|
|
couldbetty = S_ISCHR (st.st_mode);
|
|
#if _IO_HAVE_ST_BLKSIZE
|
|
size = st.st_blksize <= 0 ? _IO_BUFSIZ : st.st_blksize;
|
|
#else
|
|
size = _IO_BUFSIZ;
|
|
#endif
|
|
}
|
|
ALLOC_BUF (p, size, EOF);
|
|
_IO_setb (fp, p, p + size, 1);
|
|
if (couldbetty && isatty (fp->_fileno))
|
|
fp->_flags |= _IO_LINE_BUF;
|
|
return 1;
|
|
}
|