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 <<fputs>>, <<fputs_unlocked>>---write a character string in a file or stream
21
22 INDEX
23 fputs
24 INDEX
25 fputs_unlocked
26 INDEX
27 _fputs_r
28 INDEX
29 _fputs_unlocked_r
30
31 SYNOPSIS
32 #include <stdio.h>
33 int fputs(const char *restrict <[s]>, FILE *restrict <[fp]>);
34
35 #define _GNU_SOURCE
36 #include <stdio.h>
37 int fputs_unlocked(const char *restrict <[s]>, FILE *restrict <[fp]>);
38
39 #include <stdio.h>
40 int fputs( const char *restrict <[s]>, FILE *restrict <[fp]>);
41
42 #include <stdio.h>
43 int fputs_unlocked( const char *restrict <[s]>, FILE *restrict <[fp]>);
44
45 DESCRIPTION
46 <<fputs>> writes the string at <[s]> (but without the trailing null)
47 to the file or stream identified by <[fp]>.
48
49 <<fputs_unlocked>> is a non-thread-safe version of <<fputs>>.
50 <<fputs_unlocked>> may only safely be used within a scope
51 protected by flockfile() (or ftrylockfile()) and funlockfile(). This
52 function may safely be used in a multi-threaded program if and only
53 if they are called while the invoking thread owns the (FILE *)
54 object, as is the case after a successful call to the flockfile() or
55 ftrylockfile() functions. If threads are disabled, then
56 <<fputs_unlocked>> is equivalent to <<fputs>>.
57
58 <<_fputs_r>> and <<_fputs_unlocked_r>> are simply reentrant versions of the
59 above that take an additional reentrant struct pointer argument: <[ptr]>.
60
61 RETURNS
62 If successful, the result is <<0>>; otherwise, the result is <<EOF>>.
63
64 PORTABILITY
65 ANSI C requires <<fputs>>, but does not specify that the result on
66 success must be <<0>>; any non-negative value is permitted.
67
68 <<fputs_unlocked>> is a GNU extension.
69
70 Supporting OS subroutines required: <<close>>, <<fstat>>, <<isatty>>,
71 <<lseek>>, <<read>>, <<sbrk>>, <<write>>.
72 */
73
74 #define _DEFAULT_SOURCE
75 #include <_ansi.h>
76 #include <stdio.h>
77 #include <string.h>
78 #include "fvwrite.h"
79 #include "local.h"
80
81 #ifdef __IMPL_UNLOCKED__
82 #define _fputs_r _fputs_unlocked_r
83 #define fputs fputs_unlocked
84 #endif
85
86 /*
87 * Write the given string to the given file.
88 */
89 int
fputs(char const * __restrict s,FILE * __restrict fp)90 fputs (
91 char const *__restrict s,
92 FILE *__restrict fp)
93 {
94 #ifdef _FVWRITE_IN_STREAMIO
95 int result;
96 struct __suio uio;
97 struct __siov iov;
98
99 iov.iov_base = s;
100 iov.iov_len = uio.uio_resid = strlen (s);
101 uio.uio_iov = &iov;
102 uio.uio_iovcnt = 1;
103
104 CHECK_INIT(ptr, fp);
105
106 _newlib_flockfile_start (fp);
107 if (ORIENT (fp, -1) != -1)
108 result = EOF;
109 else
110 result = _sfvwrite (fp, &uio);
111 _newlib_flockfile_end (fp);
112 return result;
113 #else
114 const char *p = s;
115
116 CHECK_INIT(ptr, fp);
117
118 _newlib_flockfile_start (fp);
119 /* Make sure we can write. */
120 if (cantwrite (ptr, fp))
121 goto error;
122
123 while (*p)
124 {
125 if (_sputc ( *p++, fp) == EOF)
126 goto error;
127 }
128 _newlib_flockfile_exit (fp);
129 return 0;
130
131 error:
132 _newlib_flockfile_end (fp);
133 return EOF;
134 #endif
135 }
136
