xref: /titanic_51/usr/src/lib/libmail/common/copystream.c (revision 37714ae43602c675f9dc59b070bfdf9fa702872c)
1 /*
2  * CDDL HEADER START
3  *
4  * The contents of this file are subject to the terms of the
5  * Common Development and Distribution License (the "License").
6  * You may not use this file except in compliance with the License.
7  *
8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
9  * or http://www.opensolaris.org/os/licensing.
10  * See the License for the specific language governing permissions
11  * and limitations under the License.
12  *
13  * When distributing Covered Code, include this CDDL HEADER in each
14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
15  * If applicable, add the following below this CDDL HEADER, with the
16  * fields enclosed by brackets "[]" replaced with your own identifying
17  * information: Portions Copyright [yyyy] [name of copyright owner]
18  *
19  * CDDL HEADER END
20  */
21 
22 /*
23  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
24  * Use is subject to license terms.
25  */
26 
27 /*	Copyright (c) 1984, 1986, 1987, 1988, 1989 AT&T	*/
28 /*	  All Rights Reserved  	*/
29 
30 #pragma ident	"%Z%%M%	%I%	%E% SMI"
31 
32 /*
33  *  NAME
34  *	copystream - copy one FILE stream to another
35  *
36  *  SYNOPSIS
37  *	int copystream(FILE *infp, FILE *outfp)
38  *
39  *  DESCRIPTION
40  *	copystream() copies one stream to another. The stream
41  *	infp must be opened for reading and the stream outfp
42  *	must be opened for writing.
43  *
44  *	It returns true if the stream is successively copied;
45  *	false if any writes fail.
46  */
47 
48 #include "libmail.h"
49 #include <sys/types.h>
50 
51 int
52 copystream(FILE *infp, FILE *outfp)
53 {
54 	char buffer[BUFSIZ];
55 	size_t nread;
56 
57 	while ((nread = fread(buffer, sizeof (char), sizeof (buffer),
58 	    infp)) > 0)
59 		if (fwrite(buffer, sizeof (char), nread, outfp) != nread)
60 			return (0);
61 	return (1);
62 }
63