xref: /illumos-gate/usr/src/lib/libc/port/stdio/fputs.c (revision cd62a92d)
17c478bd9Sstevel@tonic-gate /*
27c478bd9Sstevel@tonic-gate  * CDDL HEADER START
37c478bd9Sstevel@tonic-gate  *
47c478bd9Sstevel@tonic-gate  * The contents of this file are subject to the terms of the
5a5f69788Scraigm  * Common Development and Distribution License (the "License").
6a5f69788Scraigm  * You may not use this file except in compliance with the License.
77c478bd9Sstevel@tonic-gate  *
87c478bd9Sstevel@tonic-gate  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
97c478bd9Sstevel@tonic-gate  * or http://www.opensolaris.org/os/licensing.
107c478bd9Sstevel@tonic-gate  * See the License for the specific language governing permissions
117c478bd9Sstevel@tonic-gate  * and limitations under the License.
127c478bd9Sstevel@tonic-gate  *
137c478bd9Sstevel@tonic-gate  * When distributing Covered Code, include this CDDL HEADER in each
147c478bd9Sstevel@tonic-gate  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
157c478bd9Sstevel@tonic-gate  * If applicable, add the following below this CDDL HEADER, with the
167c478bd9Sstevel@tonic-gate  * fields enclosed by brackets "[]" replaced with your own identifying
177c478bd9Sstevel@tonic-gate  * information: Portions Copyright [yyyy] [name of copyright owner]
187c478bd9Sstevel@tonic-gate  *
197c478bd9Sstevel@tonic-gate  * CDDL HEADER END
207c478bd9Sstevel@tonic-gate  */
227c478bd9Sstevel@tonic-gate /*
23a574db85Sraf  * Copyright 2008 Sun Microsystems, Inc.  All rights reserved.
247c478bd9Sstevel@tonic-gate  * Use is subject to license terms.
257c478bd9Sstevel@tonic-gate  */
277c478bd9Sstevel@tonic-gate /*	Copyright (c) 1988 AT&T	*/
28*cd62a92dSRobert Mustacchi /*	  All Rights Reserved	*/
307c478bd9Sstevel@tonic-gate /*
317c478bd9Sstevel@tonic-gate  * Ptr args aren't checked for NULL because the program would be a
327c478bd9Sstevel@tonic-gate  * catastrophic mess anyway.  Better to abort than just to return NULL.
337c478bd9Sstevel@tonic-gate  */
347257d1b4Sraf #include "lint.h"
357c478bd9Sstevel@tonic-gate #include "file64.h"
367c478bd9Sstevel@tonic-gate #include "mtlib.h"
377c478bd9Sstevel@tonic-gate #include <stdio.h>
387c478bd9Sstevel@tonic-gate #include <string.h>
397c478bd9Sstevel@tonic-gate #include <thread.h>
407c478bd9Sstevel@tonic-gate #include <synch.h>
417c478bd9Sstevel@tonic-gate #include <sys/types.h>
427c478bd9Sstevel@tonic-gate #include <unistd.h>
437c478bd9Sstevel@tonic-gate #include <limits.h>
447c478bd9Sstevel@tonic-gate #include "stdiom.h"
457c478bd9Sstevel@tonic-gate #include "mse.h"
477c478bd9Sstevel@tonic-gate int
fputs(const char * ptr,FILE * iop)487c478bd9Sstevel@tonic-gate fputs(const char *ptr, FILE *iop)
497c478bd9Sstevel@tonic-gate {
507c478bd9Sstevel@tonic-gate 	ssize_t ndone = 0L, n;
517c478bd9Sstevel@tonic-gate 	unsigned char *cptr, *bufend;
527c478bd9Sstevel@tonic-gate 	rmutex_t *lk;
537c478bd9Sstevel@tonic-gate 	size_t	ptrlen;
547c478bd9Sstevel@tonic-gate 	size_t	len = 0;
557c478bd9Sstevel@tonic-gate 	int	c;
577c478bd9Sstevel@tonic-gate 	FLOCKFILE(lk, iop);
597c478bd9Sstevel@tonic-gate 	_SET_ORIENTATION_BYTE(iop);
617c478bd9Sstevel@tonic-gate 	if (_WRTCHK(iop)) {
627c478bd9Sstevel@tonic-gate 		FUNLOCKFILE(lk);
637c478bd9Sstevel@tonic-gate 		return (EOF);
647c478bd9Sstevel@tonic-gate 	}
657c478bd9Sstevel@tonic-gate 	bufend = _bufend(iop);
677c478bd9Sstevel@tonic-gate 	ptrlen = strlen(ptr);
687c478bd9Sstevel@tonic-gate 	if ((iop->_flag & _IONBF) == 0) {
697c478bd9Sstevel@tonic-gate 		for (; ; ptr += len, ptrlen -= len) {
707c478bd9Sstevel@tonic-gate 			while ((n = bufend - (cptr = iop->_ptr)) <= 0) {
717c478bd9Sstevel@tonic-gate 				/* full buf */
727c478bd9Sstevel@tonic-gate 				if (_xflsbuf(iop) == EOF) {
737c478bd9Sstevel@tonic-gate 					FUNLOCKFILE(lk);
747c478bd9Sstevel@tonic-gate 					return (EOF);
757c478bd9Sstevel@tonic-gate 				}
767c478bd9Sstevel@tonic-gate 			}
777c478bd9Sstevel@tonic-gate 			/*
787c478bd9Sstevel@tonic-gate 			 * n: number of available bytes in the buffer of 'iop'
797c478bd9Sstevel@tonic-gate 			 * ptrlen: number of remaining bytes in 'ptr' string
807c478bd9Sstevel@tonic-gate 			 *
817c478bd9Sstevel@tonic-gate 			 * If all remaining bytes in 'ptr' can be copied into
827c478bd9Sstevel@tonic-gate 			 * the buffer of 'iop' (ptrlen <= n), 'len' is set to
837c478bd9Sstevel@tonic-gate 			 * 'ptrlen'.  Otherwise, 'len' is set to 'n'.
847c478bd9Sstevel@tonic-gate 			 * Then, copies 'len' bytes from 'ptr' to the buffer
857c478bd9Sstevel@tonic-gate 			 * of 'iop'.
867c478bd9Sstevel@tonic-gate 			 */
877c478bd9Sstevel@tonic-gate 			len = (c = (ptrlen <= n)) ? ptrlen : n;
887c478bd9Sstevel@tonic-gate 			(void) memcpy(cptr, ptr, len);
897c478bd9Sstevel@tonic-gate 			iop->_cnt -= len;
907c478bd9Sstevel@tonic-gate 			iop->_ptr += len;
917c478bd9Sstevel@tonic-gate 			if (_needsync(iop, bufend))
927c478bd9Sstevel@tonic-gate 				_bufsync(iop, bufend);
937c478bd9Sstevel@tonic-gate 			ndone += len;
947c478bd9Sstevel@tonic-gate 			if (c) {
957c478bd9Sstevel@tonic-gate 				/*
967c478bd9Sstevel@tonic-gate 				 * All bytes in 'ptr' have been copied into
977c478bd9Sstevel@tonic-gate 				 * the buffer of 'iop'.
987c478bd9Sstevel@tonic-gate 				 * Flush buffer if line-buffered
997c478bd9Sstevel@tonic-gate 				 */
1007c478bd9Sstevel@tonic-gate 				if (iop->_flag & _IOLBF)
1017c478bd9Sstevel@tonic-gate 					if (_xflsbuf(iop) == EOF) {
1027c478bd9Sstevel@tonic-gate 						FUNLOCKFILE(lk);
1037c478bd9Sstevel@tonic-gate 						return (EOF);
1047c478bd9Sstevel@tonic-gate 					}
1057c478bd9Sstevel@tonic-gate 				FUNLOCKFILE(lk);
1067c478bd9Sstevel@tonic-gate 				if (ndone <= INT_MAX)
1077c478bd9Sstevel@tonic-gate 					return ((int)ndone);
1087c478bd9Sstevel@tonic-gate 				else
1097c478bd9Sstevel@tonic-gate 					return (EOF);
1107c478bd9Sstevel@tonic-gate 			}
1117c478bd9Sstevel@tonic-gate 		}
112*cd62a92dSRobert Mustacchi 	} else {
1137c478bd9Sstevel@tonic-gate 		/* write out to an unbuffered file */
1147c478bd9Sstevel@tonic-gate 		ssize_t num_wrote;
1157c478bd9Sstevel@tonic-gate 		ssize_t count = (ssize_t)ptrlen;
117*cd62a92dSRobert Mustacchi 		while ((num_wrote = _xwrite(iop, ptr, (size_t)count)) !=
118*cd62a92dSRobert Mustacchi 		    count) {
119a574db85Sraf 			if (num_wrote <= 0) {
120a574db85Sraf 				if (!cancel_active())
1217c478bd9Sstevel@tonic-gate 					iop->_flag |= _IOERR;
122a574db85Sraf 				FUNLOCKFILE(lk);
123a574db85Sraf 				return (EOF);
124a574db85Sraf 			}
125a574db85Sraf 			count -= num_wrote;
126a574db85Sraf 			ptr += num_wrote;
1277c478bd9Sstevel@tonic-gate 		}
1287c478bd9Sstevel@tonic-gate 		FUNLOCKFILE(lk);
1297c478bd9Sstevel@tonic-gate 		if (ptrlen <= INT_MAX)
1307c478bd9Sstevel@tonic-gate 			return ((int)ptrlen);
1317c478bd9Sstevel@tonic-gate 		else
1327c478bd9Sstevel@tonic-gate 			return (EOF);
1337c478bd9Sstevel@tonic-gate 	}
1347c478bd9Sstevel@tonic-gate }