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 /*
19 FUNCTION
20 <<puts>>---write a character string
21
22 INDEX
23 puts
24 INDEX
25 _puts_r
26
27 SYNOPSIS
28 #include <stdio.h>
29 int puts(const char *<[s]>);
30
31 int puts( const char *<[s]>);
32
33 DESCRIPTION
34 <<puts>> writes the string at <[s]> (followed by a newline, instead of
35 the trailing null) to the standard output stream.
36
37 The alternate function <<_puts_r>> is a reentrant version. The extra
38 argument <[reent]> is a pointer to a reentrancy structure.
39
40 RETURNS
41 If successful, the result is a nonnegative integer; otherwise, the
42 result is <<EOF>>.
43
44 PORTABILITY
45 ANSI C requires <<puts>>, but does not specify that the result on
46 success must be <<0>>; any non-negative value is permitted.
47
48 Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>,
49 <<lseek>>, <<read>>, <<sbrk>>, <<write>>.
50 */
51
52 #if defined(LIBC_SCCS) && !defined(lint)
53 static char sccsid[] = "%W% (Berkeley) %G%";
54 #endif /* LIBC_SCCS and not lint */
55
56 #define _DEFAULT_SOURCE
57 #include <stdio.h>
58 #include <string.h>
59 #include "fvwrite.h"
60 #include "local.h"
61
62 /*
63 * Write the given string to stdout, appending a newline.
64 */
65
66 int
puts(const char * s)67 puts (
68 const char * s)
69 {
70 #ifdef _FVWRITE_IN_STREAMIO
71 int result;
72 size_t c = strlen (s);
73 struct __suio uio;
74 struct __siov iov[2];
75 FILE *fp;
76
77 iov[0].iov_base = s;
78 iov[0].iov_len = c;
79 iov[1].iov_base = "\n";
80 iov[1].iov_len = 1;
81 uio.uio_resid = c + 1;
82 uio.uio_iov = &iov[0];
83 uio.uio_iovcnt = 2;
84
85 _REENT_SMALL_CHECK_INIT (ptr);
86 fp = _stdout_r (ptr);
87 CHECK_INIT (ptr, fp);
88 _newlib_flockfile_start (fp);
89 if (ORIENT (fp, -1) != -1)
90 result = EOF;
91 else
92 result = (_sfvwrite (fp, &uio) ? EOF : '\n');
93 _newlib_flockfile_end (fp);
94 return result;
95 #else
96 int result = EOF;
97 const char *p = s;
98 FILE *fp;
99 _REENT_SMALL_CHECK_INIT (ptr);
100
101 fp = _stdout_r (ptr);
102 CHECK_INIT (ptr, fp);
103 _newlib_flockfile_start (fp);
104 /* Make sure we can write. */
105 if (cantwrite (ptr, fp))
106 goto err;
107
108 while (*p)
109 {
110 if (_sputc ( *p++, fp) == EOF)
111 goto err;
112 }
113 if (_sputc ( '\n', fp) == EOF)
114 goto err;
115
116 result = '\n';
117
118 err:
119 _newlib_flockfile_end (fp);
120 return result;
121 #endif
122 }
123
