xref: /freebsd/lib/libc/stdio/puts.c (revision 4b9d6057)
1 /*-
2  * SPDX-License-Identifier: BSD-3-Clause
3  *
4  * Copyright (c) 1990, 1993
5  *	The Regents of the University of California.  All rights reserved.
6  *
7  * This code is derived from software contributed to Berkeley by
8  * Chris Torek.
9  *
10  * Redistribution and use in source and binary forms, with or without
11  * modification, are permitted provided that the following conditions
12  * are met:
13  * 1. Redistributions of source code must retain the above copyright
14  *    notice, this list of conditions and the following disclaimer.
15  * 2. Redistributions in binary form must reproduce the above copyright
16  *    notice, this list of conditions and the following disclaimer in the
17  *    documentation and/or other materials provided with the distribution.
18  * 3. Neither the name of the University nor the names of its contributors
19  *    may be used to endorse or promote products derived from this software
20  *    without specific prior written permission.
21  *
22  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32  * SUCH DAMAGE.
33  */
34 
35 #include "namespace.h"
36 #include <stdio.h>
37 #include <string.h>
38 #include "un-namespace.h"
39 #include "fvwrite.h"
40 #include "libc_private.h"
41 #include "local.h"
42 
43 /*
44  * Write the given string to stdout, appending a newline.
45  */
46 int
47 puts(char const *s)
48 {
49 	int retval;
50 	size_t c;
51 	struct __suio uio;
52 	struct __siov iov[2];
53 
54 	iov[0].iov_base = (void *)s;
55 	iov[0].iov_len = c = strlen(s);
56 	iov[1].iov_base = "\n";
57 	iov[1].iov_len = 1;
58 	uio.uio_resid = c + 1;
59 	uio.uio_iov = &iov[0];
60 	uio.uio_iovcnt = 2;
61 	FLOCKFILE_CANCELSAFE(stdout);
62 	ORIENT(stdout, -1);
63 	retval = __sfvwrite(stdout, &uio) ? EOF : '\n';
64 	FUNLOCKFILE_CANCELSAFE();
65 	return (retval);
66 }
67