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
5a574db85Sraf * Common Development and Distribution License (the "License").
6a574db85Sraf * 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 */
21a574db85Sraf
227c478bd9Sstevel@tonic-gate /*
23a574db85Sraf * 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) 1983, 1984, 1985, 1986, 1987, 1988, 1989 AT&T */
287c478bd9Sstevel@tonic-gate /* All Rights Reserved */
297c478bd9Sstevel@tonic-gate
307c478bd9Sstevel@tonic-gate #pragma ident "%Z%%M% %I% %E% SMI"
317c478bd9Sstevel@tonic-gate
32*7257d1b4Sraf #include "lint.h"
337c478bd9Sstevel@tonic-gate #include "mtlib.h"
347c478bd9Sstevel@tonic-gate #include "file64.h"
357c478bd9Sstevel@tonic-gate #include <stdio.h>
367c478bd9Sstevel@tonic-gate #include <thread.h>
377c478bd9Sstevel@tonic-gate #include <synch.h>
387c478bd9Sstevel@tonic-gate #include <stdlib.h>
397c478bd9Sstevel@tonic-gate #include <errno.h>
407c478bd9Sstevel@tonic-gate #include <stdio_ext.h>
417c478bd9Sstevel@tonic-gate #include "stdiom.h"
427c478bd9Sstevel@tonic-gate
43*7257d1b4Sraf #define _iob __iob
44*7257d1b4Sraf
457c478bd9Sstevel@tonic-gate /*
46a574db85Sraf * _flockget and _flockrel are only called by the
47a574db85Sraf * FLOCKFILE/FUNLOCKFILE macros in mtlib.h.
487c478bd9Sstevel@tonic-gate */
497c478bd9Sstevel@tonic-gate
507c478bd9Sstevel@tonic-gate /*
517c478bd9Sstevel@tonic-gate * compute the lock's position, acquire it and return its pointer
527c478bd9Sstevel@tonic-gate */
537c478bd9Sstevel@tonic-gate
547c478bd9Sstevel@tonic-gate rmutex_t *
_flockget(FILE * iop)557c478bd9Sstevel@tonic-gate _flockget(FILE *iop)
567c478bd9Sstevel@tonic-gate {
577c478bd9Sstevel@tonic-gate rmutex_t *rl = IOB_LCK(iop);
587c478bd9Sstevel@tonic-gate
597c478bd9Sstevel@tonic-gate if (rl != NULL)
60a574db85Sraf cancel_safe_mutex_lock(rl);
617c478bd9Sstevel@tonic-gate return (rl);
627c478bd9Sstevel@tonic-gate }
637c478bd9Sstevel@tonic-gate
647c478bd9Sstevel@tonic-gate int
ftrylockfile(FILE * iop)657c478bd9Sstevel@tonic-gate ftrylockfile(FILE *iop)
667c478bd9Sstevel@tonic-gate {
677c478bd9Sstevel@tonic-gate rmutex_t *rl = IOB_LCK(iop);
687c478bd9Sstevel@tonic-gate
697c478bd9Sstevel@tonic-gate if (rl != NULL)
708cd45542Sraf return (mutex_trylock(rl));
717c478bd9Sstevel@tonic-gate return (0); /* can't happen? */
727c478bd9Sstevel@tonic-gate }
737c478bd9Sstevel@tonic-gate
747c478bd9Sstevel@tonic-gate void
flockfile(FILE * iop)757c478bd9Sstevel@tonic-gate flockfile(FILE *iop)
767c478bd9Sstevel@tonic-gate {
777c478bd9Sstevel@tonic-gate rmutex_t *rl = IOB_LCK(iop);
787c478bd9Sstevel@tonic-gate
797c478bd9Sstevel@tonic-gate if (rl != NULL)
80*7257d1b4Sraf (void) mutex_lock(rl);
817c478bd9Sstevel@tonic-gate }
827c478bd9Sstevel@tonic-gate
837c478bd9Sstevel@tonic-gate void
funlockfile(FILE * iop)847c478bd9Sstevel@tonic-gate funlockfile(FILE *iop)
857c478bd9Sstevel@tonic-gate {
867c478bd9Sstevel@tonic-gate rmutex_t *rl = IOB_LCK(iop);
877c478bd9Sstevel@tonic-gate
887c478bd9Sstevel@tonic-gate if (rl != NULL)
89*7257d1b4Sraf (void) mutex_unlock(rl);
907c478bd9Sstevel@tonic-gate }
917c478bd9Sstevel@tonic-gate
927c478bd9Sstevel@tonic-gate int
__fsetlocking(FILE * iop,int type)937c478bd9Sstevel@tonic-gate __fsetlocking(FILE *iop, int type)
947c478bd9Sstevel@tonic-gate {
957c478bd9Sstevel@tonic-gate int ret = 0;
967c478bd9Sstevel@tonic-gate
977c478bd9Sstevel@tonic-gate ret = GET_IONOLOCK(iop) ? FSETLOCKING_BYCALLER : FSETLOCKING_INTERNAL;
987c478bd9Sstevel@tonic-gate
997c478bd9Sstevel@tonic-gate switch (type) {
1007c478bd9Sstevel@tonic-gate
1017c478bd9Sstevel@tonic-gate case FSETLOCKING_QUERY:
1027c478bd9Sstevel@tonic-gate break;
1037c478bd9Sstevel@tonic-gate
1047c478bd9Sstevel@tonic-gate case FSETLOCKING_INTERNAL:
1057c478bd9Sstevel@tonic-gate CLEAR_IONOLOCK(iop);
1067c478bd9Sstevel@tonic-gate break;
1077c478bd9Sstevel@tonic-gate
1087c478bd9Sstevel@tonic-gate case FSETLOCKING_BYCALLER:
1097c478bd9Sstevel@tonic-gate SET_IONOLOCK(iop);
1107c478bd9Sstevel@tonic-gate break;
1117c478bd9Sstevel@tonic-gate
1127c478bd9Sstevel@tonic-gate default:
1137c478bd9Sstevel@tonic-gate errno = EINVAL;
1147c478bd9Sstevel@tonic-gate return (-1);
1157c478bd9Sstevel@tonic-gate }
1167c478bd9Sstevel@tonic-gate
1177c478bd9Sstevel@tonic-gate return (ret);
1187c478bd9Sstevel@tonic-gate }
119