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 #pragma ident "%Z%%M% %I% %E% SMI"
31
32
33 /*
34 * Ptr args aren't checked for NULL because the program would be a
35 * catastrophic mess anyway. Better to abort than just to return NULL.
36 */
37 #include "lint.h"
38 #include "file64.h"
39 #include "mtlib.h"
40 #include <stdio.h>
41 #include <string.h>
42 #include <thread.h>
43 #include <synch.h>
44 #include <sys/types.h>
45 #include <unistd.h>
46 #include <limits.h>
47 #include "stdiom.h"
48 #include "mse.h"
49
50 int
fputs(const char * ptr,FILE * iop)51 fputs(const char *ptr, FILE *iop)
52 {
53 ssize_t ndone = 0L, n;
54 unsigned char *cptr, *bufend;
55 rmutex_t *lk;
56 size_t ptrlen;
57 size_t len = 0;
58 int c;
59
60 FLOCKFILE(lk, iop);
61
62 _SET_ORIENTATION_BYTE(iop);
63
64 if (_WRTCHK(iop)) {
65 FUNLOCKFILE(lk);
66 return (EOF);
67 }
68 bufend = _bufend(iop);
69
70 ptrlen = strlen(ptr);
71 if ((iop->_flag & _IONBF) == 0) {
72 for (; ; ptr += len, ptrlen -= len) {
73 while ((n = bufend - (cptr = iop->_ptr)) <= 0) {
74 /* full buf */
75 if (_xflsbuf(iop) == EOF) {
76 FUNLOCKFILE(lk);
77 return (EOF);
78 }
79 }
80 /*
81 * n: number of available bytes in the buffer of 'iop'
82 * ptrlen: number of remaining bytes in 'ptr' string
83 *
84 * If all remaining bytes in 'ptr' can be copied into
85 * the buffer of 'iop' (ptrlen <= n), 'len' is set to
86 * 'ptrlen'. Otherwise, 'len' is set to 'n'.
87 * Then, copies 'len' bytes from 'ptr' to the buffer
88 * of 'iop'.
89 */
90 len = (c = (ptrlen <= n)) ? ptrlen : n;
91 (void) memcpy(cptr, ptr, len);
92 iop->_cnt -= len;
93 iop->_ptr += len;
94 if (_needsync(iop, bufend))
95 _bufsync(iop, bufend);
96 ndone += len;
97 if (c) {
98 /*
99 * All bytes in 'ptr' have been copied into
100 * the buffer of 'iop'.
101 * Flush buffer if line-buffered
102 */
103 if (iop->_flag & _IOLBF)
104 if (_xflsbuf(iop) == EOF) {
105 FUNLOCKFILE(lk);
106 return (EOF);
107 }
108 FUNLOCKFILE(lk);
109 if (ndone <= INT_MAX)
110 return ((int)ndone);
111 else
112 return (EOF);
113 }
114 }
115 }
116 else
117 {
118 /* write out to an unbuffered file */
119 ssize_t num_wrote;
120 ssize_t count = (ssize_t)ptrlen;
121 int fd = GET_FD(iop);
122
123 while ((num_wrote = write(fd, ptr, (size_t)count)) != count) {
124 if (num_wrote <= 0) {
125 if (!cancel_active())
126 iop->_flag |= _IOERR;
127 FUNLOCKFILE(lk);
128 return (EOF);
129 }
130 count -= num_wrote;
131 ptr += num_wrote;
132 }
133 FUNLOCKFILE(lk);
134 if (ptrlen <= INT_MAX)
135 return ((int)ptrlen);
136 else
137 return (EOF);
138 }
139 }
140