1 /* $NetBSD: puts.c,v 1.17 2018/02/04 01:13:45 mrg Exp $ */
2
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 <sys/cdefs.h>
36 #if defined(LIBC_SCCS) && !defined(lint)
37 #if 0
38 static char sccsid[] = "@(#)puts.c 8.1 (Berkeley) 6/4/93";
39 #else
40 __RCSID("$NetBSD: puts.c,v 1.17 2018/02/04 01:13:45 mrg Exp $");
41 #endif
42 #endif /* LIBC_SCCS and not lint */
43
44 #include <assert.h>
45 #include <errno.h>
46 #include <stdio.h>
47 #include <string.h>
48 #include "fvwrite.h"
49 #include "reentrant.h"
50 #include "local.h"
51
52 /*
53 * Write the given string to stdout, appending a newline.
54 */
55 int
puts(char const * s)56 puts(char const *s)
57 {
58 size_t c;
59 struct __suio uio;
60 struct __siov iov[2];
61 const void *vs = s;
62 int r;
63
64 /* This avoids -Werror=nonnull-compare. */
65 if (vs == NULL)
66 s = "(null)";
67
68 c = strlen(s);
69
70 iov[0].iov_base = __UNCONST(s);
71 iov[0].iov_len = c;
72 iov[1].iov_base = __UNCONST("\n");
73 iov[1].iov_len = 1;
74 uio.uio_resid = c + 1;
75 uio.uio_iov = &iov[0];
76 uio.uio_iovcnt = 2;
77 FLOCKFILE(stdout);
78 r = __sfvwrite(stdout, &uio);
79 FUNLOCKFILE(stdout);
80 return r ? EOF : '\n';
81 }
82