1/* setlinebuf.c - line-buffer a stdio stream. */
2
3/* Copyright (C) 1997 Free Software Foundation, Inc.
4
5   This file is part of GNU Bash, the Bourne Again SHell.
6
7   Bash is free software; you can redistribute it and/or modify it under
8   the terms of the GNU General Public License as published by the Free
9   Software Foundation; either version 2, or (at your option) any later
10   version.
11
12   Bash is distributed in the hope that it will be useful, but WITHOUT ANY
13   WARRANTY; without even the implied warranty of MERCHANTABILITY or
14   FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
15   for more details.
16
17   You should have received a copy of the GNU General Public License along
18   with Bash; see the file COPYING.  If not, write to the Free Software
19   Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA */
20
21#include <config.h>
22
23#include <stdio.h>
24
25#include <xmalloc.h>
26
27#if defined (USING_BASH_MALLOC)
28#  define LBUF_BUFSIZE	1008
29#else
30#  define LBUF_BUFSIZE	BUFSIZ
31#endif
32
33/* Cause STREAM to buffer lines as opposed to characters or blocks. */
34int
35sh_setlinebuf (stream)
36     FILE *stream;
37{
38  char *local_linebuf;
39
40#if !defined (HAVE_SETLINEBUF) && !defined (HAVE_SETVBUF)
41  return (0);
42#endif
43
44#if defined (USING_BASH_MALLOC)
45  local_linebuf = (char *)xmalloc (LBUF_BUFSIZE);
46#else
47  local_linebuf = (char *)NULL;
48#endif
49
50#if defined (HAVE_SETVBUF)
51
52#  if defined (SETVBUF_REVERSED)
53  return (setvbuf (stream, _IOLBF, local_linebuf, LBUF_BUFSIZE));
54#  else /* !SETVBUF_REVERSED */
55  return (setvbuf (stream, local_linebuf, _IOLBF, LBUF_BUFSIZE));
56#  endif /* !SETVBUF_REVERSED */
57# else /* !HAVE_SETVBUF */
58
59  setlinebuf (stream);
60  return (0);
61
62#endif /* !HAVE_SETVBUF */
63}
64