1 /*
2 * Copyright (c) 1990 The Regents of the University of California.
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms are permitted
6 * provided that the above copyright notice and this paragraph are
7 * duplicated in all such forms and that any documentation,
8 * and/or other materials related to such
9 * distribution and use acknowledge that the software was developed
10 * by the University of California, Berkeley. The name of the
11 * University may not be used to endorse or promote products derived
12 * from this software without specific prior written permission.
13 * THIS SOFTWARE IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR
14 * IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED
15 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE.
16 */
17 /*
18 Modified copy of setbuf.c to support setlinebuf function
19 defined as part of BSD.
20 Modifications by Gareth Pearce, 2001.
21 */
22
23 /*
24 FUNCTION
25 <<setlinebuf>>---specify line buffering for a file or stream
26
27 INDEX
28 setlinebuf
29
30 SYNOPSIS
31 #include <stdio.h>
32 void setlinebuf(FILE *<[fp]>);
33
34 DESCRIPTION
35 <<setlinebuf>> specifies that output to the file or stream identified by
36 <[fp]> should be line buffered. This causes the file or stream to pass
37 on output to the host system at every newline, as well as when the
38 buffer is full, or when an input operation intervenes.
39
40 WARNINGS
41 You may only use <<setlinebuf>> before performing any file operation
42 other than opening the file.
43
44 RETURNS
45 <<setlinebuf>> returns as per setvbuf.
46
47 PORTABILITY
48 This function comes from BSD not ANSI or POSIX.
49
50 Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>,
51 <<lseek>>, <<read>>, <<sbrk>>, <<write>>.
52 */
53
54 #define _DEFAULT_SOURCE
55 #include <_ansi.h>
56 #include <stdio.h>
57 #include "local.h"
58
59 int
setlinebuf(FILE * fp)60 setlinebuf (FILE * fp)
61 {
62 return (setvbuf (fp, (char *) NULL, _IOLBF, (size_t) 0));
63 }
64
