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
5*7257d1b4Sraf * Common Development and Distribution License (the "License").
6*7257d1b4Sraf * 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 */
21*7257d1b4Sraf
227c478bd9Sstevel@tonic-gate /*
23*7257d1b4Sraf * Copyright 2008 Sun Microsystems, Inc. All rights reserved.
247c478bd9Sstevel@tonic-gate * Use is subject to license terms.
257c478bd9Sstevel@tonic-gate */
267c478bd9Sstevel@tonic-gate
277c478bd9Sstevel@tonic-gate /* Copyright (c) 1988 AT&T */
287c478bd9Sstevel@tonic-gate /* All Rights Reserved */
297c478bd9Sstevel@tonic-gate
30*7257d1b4Sraf #include "lint.h"
317c478bd9Sstevel@tonic-gate #include "file64.h"
327c478bd9Sstevel@tonic-gate #include "mtlib.h"
337c478bd9Sstevel@tonic-gate #include <stdio.h>
347c478bd9Sstevel@tonic-gate #include <memory.h>
357c478bd9Sstevel@tonic-gate #include <errno.h>
367c478bd9Sstevel@tonic-gate #include <thread.h>
377c478bd9Sstevel@tonic-gate #include <synch.h>
387c478bd9Sstevel@tonic-gate #include <sys/types.h>
397c478bd9Sstevel@tonic-gate #include "stdiom.h"
407c478bd9Sstevel@tonic-gate #include "mse.h"
417c478bd9Sstevel@tonic-gate
427c478bd9Sstevel@tonic-gate /* read size-max line from stream, including '\n' */
437c478bd9Sstevel@tonic-gate char *
fgets(char * buf,int size,FILE * iop)447c478bd9Sstevel@tonic-gate fgets(char *buf, int size, FILE *iop)
457c478bd9Sstevel@tonic-gate {
467c478bd9Sstevel@tonic-gate char *ptr = buf;
477c478bd9Sstevel@tonic-gate int n;
487c478bd9Sstevel@tonic-gate Uchar *bufend;
497c478bd9Sstevel@tonic-gate char *p;
507c478bd9Sstevel@tonic-gate rmutex_t *lk;
517c478bd9Sstevel@tonic-gate
527c478bd9Sstevel@tonic-gate FLOCKFILE(lk, iop);
537c478bd9Sstevel@tonic-gate
547c478bd9Sstevel@tonic-gate _SET_ORIENTATION_BYTE(iop);
557c478bd9Sstevel@tonic-gate
567c478bd9Sstevel@tonic-gate if (!(iop->_flag & (_IOREAD | _IORW))) {
577c478bd9Sstevel@tonic-gate errno = EBADF;
587c478bd9Sstevel@tonic-gate FUNLOCKFILE(lk);
597c478bd9Sstevel@tonic-gate return (NULL);
607c478bd9Sstevel@tonic-gate }
617c478bd9Sstevel@tonic-gate
627c478bd9Sstevel@tonic-gate if (iop->_base == NULL) {
637c478bd9Sstevel@tonic-gate if ((bufend = _findbuf(iop)) == NULL) {
647c478bd9Sstevel@tonic-gate FUNLOCKFILE(lk);
657c478bd9Sstevel@tonic-gate return (NULL);
667c478bd9Sstevel@tonic-gate }
677c478bd9Sstevel@tonic-gate }
687c478bd9Sstevel@tonic-gate else
697c478bd9Sstevel@tonic-gate bufend = _bufend(iop);
707c478bd9Sstevel@tonic-gate
717c478bd9Sstevel@tonic-gate size--; /* room for '\0' */
727c478bd9Sstevel@tonic-gate while (size > 0) {
737c478bd9Sstevel@tonic-gate /* empty buffer */
747c478bd9Sstevel@tonic-gate if (iop->_cnt <= 0) {
757c478bd9Sstevel@tonic-gate if (__filbuf(iop) != EOF) {
767c478bd9Sstevel@tonic-gate iop->_ptr--; /* put back the character */
777c478bd9Sstevel@tonic-gate iop->_cnt++;
787c478bd9Sstevel@tonic-gate } else if (ptr == buf) { /* never read anything */
797c478bd9Sstevel@tonic-gate FUNLOCKFILE(lk);
807c478bd9Sstevel@tonic-gate return (NULL);
817c478bd9Sstevel@tonic-gate } else
827c478bd9Sstevel@tonic-gate break; /* nothing left to read */
837c478bd9Sstevel@tonic-gate }
847c478bd9Sstevel@tonic-gate n = (int)(size < iop->_cnt ? size : iop->_cnt);
857c478bd9Sstevel@tonic-gate if ((p = memccpy(ptr, (char *)iop->_ptr, '\n',
867c478bd9Sstevel@tonic-gate (size_t)n)) != NULL)
877c478bd9Sstevel@tonic-gate n = (int)(p - ptr);
887c478bd9Sstevel@tonic-gate ptr += n;
897c478bd9Sstevel@tonic-gate iop->_cnt -= n;
907c478bd9Sstevel@tonic-gate iop->_ptr += n;
917c478bd9Sstevel@tonic-gate if (_needsync(iop, bufend))
927c478bd9Sstevel@tonic-gate _bufsync(iop, bufend);
937c478bd9Sstevel@tonic-gate if (p != NULL)
947c478bd9Sstevel@tonic-gate break; /* newline found */
957c478bd9Sstevel@tonic-gate size -= n;
967c478bd9Sstevel@tonic-gate }
977c478bd9Sstevel@tonic-gate FUNLOCKFILE(lk);
987c478bd9Sstevel@tonic-gate *ptr = '\0';
997c478bd9Sstevel@tonic-gate return (buf);
1007c478bd9Sstevel@tonic-gate }
101