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#include "lint.h"
33#include "file64.h"
34#include "mtlib.h"
35#include <sys/types.h>
36#include <stdio.h>
37#include <memory.h>
38#include <thread.h>
39#include <synch.h>
40#include <limits.h>
41#include "stdiom.h"
42#include "mse.h"
43
44int
45puts(const char *ptr)
46{
47	ssize_t ndone = 0L, n;
48	unsigned char *cptr, *bufend;
49	rmutex_t *lk;
50	size_t	ptrlen;
51	size_t	len = 0;
52	int	c;
53
54	FLOCKFILE(lk, stdout);
55
56	_SET_ORIENTATION_BYTE(stdout);
57
58	if (_WRTCHK(stdout)) {
59		FUNLOCKFILE(lk);
60		return (EOF);
61	}
62
63	bufend = _bufend(stdout);
64
65	ptrlen = strlen(ptr) + 1;	/* adding 1 for '\n' */
66	for (; ; ptr += len, ptrlen -= len) {
67		while ((n = bufend - (cptr = stdout->_ptr)) <= 0) /* full buf */
68		{
69			if (_xflsbuf(stdout) == EOF) {
70				FUNLOCKFILE(lk);
71				return (EOF);
72			}
73		}
74		/*
75		 * n: number of available bytes in the buffer of stdout
76		 * ptrlen: number of remaining bytes in 'ptr' string
77		 *
78		 * If all remaining bytes in 'ptr' can be copied into
79		 * the buffer of stdout (ptrlen <= n), 'len' is set to
80		 * 'ptrlen'.  Otherwise, 'len' is set to 'n'.
81		 * Then, copies 'len' bytes from 'ptr' to the buffer
82		 * of stdout.
83		 */
84		len = (c = (ptrlen <= n)) ? ptrlen : n;
85		(void) memcpy(cptr, ptr, len);
86		stdout->_cnt -= len;
87		stdout->_ptr += len;
88		if (_needsync(stdout, bufend))
89			_bufsync(stdout, bufend);
90		ndone += len;
91		if (c) {
92			/*
93			 * All bytes in 'ptr' can be copied into
94			 * the buffer of stdout.
95			 * Terminate the buffer of stdout with '\n'
96			 * and flush line buffer
97			 */
98			stdout->_ptr[-1] = '\n';
99			if (stdout->_flag & (_IONBF | _IOLBF)) {
100				/* flush line */
101				if (_xflsbuf(stdout) == EOF) {
102					FUNLOCKFILE(lk);
103					return (EOF);
104				}
105			}
106			FUNLOCKFILE(lk);
107			if (ndone <= INT_MAX)
108				return ((int)ndone);
109			else
110				return (EOF);
111		}
112	}
113}
114