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) 1988 AT&T */
28 /* All Rights Reserved */
29
30 /*
31 * Ptr args aren't checked for NULL because the program would be a
32 * catastrophic mess anyway. Better to abort than just to return NULL.
33 */
34 #include "lint.h"
35 #include "file64.h"
36 #include "mtlib.h"
37 #include <stdio.h>
38 #include <string.h>
39 #include <thread.h>
40 #include <synch.h>
41 #include <sys/types.h>
42 #include <unistd.h>
43 #include <limits.h>
44 #include "stdiom.h"
45 #include "mse.h"
46
47 int
fputs(const char * ptr,FILE * iop)48 fputs(const char *ptr, FILE *iop)
49 {
50 ssize_t ndone = 0L, n;
51 unsigned char *cptr, *bufend;
52 rmutex_t *lk;
53 size_t ptrlen;
54 size_t len = 0;
55 int c;
56
57 FLOCKFILE(lk, iop);
58
59 _SET_ORIENTATION_BYTE(iop);
60
61 if (_WRTCHK(iop)) {
62 FUNLOCKFILE(lk);
63 return (EOF);
64 }
65 bufend = _bufend(iop);
66
67 ptrlen = strlen(ptr);
68 if ((iop->_flag & _IONBF) == 0) {
69 for (; ; ptr += len, ptrlen -= len) {
70 while ((n = bufend - (cptr = iop->_ptr)) <= 0) {
71 /* full buf */
72 if (_xflsbuf(iop) == EOF) {
73 FUNLOCKFILE(lk);
74 return (EOF);
75 }
76 }
77 /*
78 * n: number of available bytes in the buffer of 'iop'
79 * ptrlen: number of remaining bytes in 'ptr' string
80 *
81 * If all remaining bytes in 'ptr' can be copied into
82 * the buffer of 'iop' (ptrlen <= n), 'len' is set to
83 * 'ptrlen'. Otherwise, 'len' is set to 'n'.
84 * Then, copies 'len' bytes from 'ptr' to the buffer
85 * of 'iop'.
86 */
87 len = (c = (ptrlen <= n)) ? ptrlen : n;
88 (void) memcpy(cptr, ptr, len);
89 iop->_cnt -= len;
90 iop->_ptr += len;
91 if (_needsync(iop, bufend))
92 _bufsync(iop, bufend);
93 ndone += len;
94 if (c) {
95 /*
96 * All bytes in 'ptr' have been copied into
97 * the buffer of 'iop'.
98 * Flush buffer if line-buffered
99 */
100 if (iop->_flag & _IOLBF)
101 if (_xflsbuf(iop) == EOF) {
102 FUNLOCKFILE(lk);
103 return (EOF);
104 }
105 FUNLOCKFILE(lk);
106 if (ndone <= INT_MAX)
107 return ((int)ndone);
108 else
109 return (EOF);
110 }
111 }
112 } else {
113 /* write out to an unbuffered file */
114 ssize_t num_wrote;
115 ssize_t count = (ssize_t)ptrlen;
116
117 while ((num_wrote = _xwrite(iop, ptr, (size_t)count)) !=
118 count) {
119 if (num_wrote <= 0) {
120 if (!cancel_active())
121 iop->_flag |= _IOERR;
122 FUNLOCKFILE(lk);
123 return (EOF);
124 }
125 count -= num_wrote;
126 ptr += num_wrote;
127 }
128 FUNLOCKFILE(lk);
129 if (ptrlen <= INT_MAX)
130 return ((int)ptrlen);
131 else
132 return (EOF);
133 }
134 }
135