158f0484fSRodney W. Grimes /*-
2*8a16b7a1SPedro F. Giffuni * SPDX-License-Identifier: BSD-3-Clause
3*8a16b7a1SPedro F. Giffuni *
458f0484fSRodney W. Grimes * Copyright (c) 1990, 1993
558f0484fSRodney W. Grimes * The Regents of the University of California. All rights reserved.
658f0484fSRodney W. Grimes *
758f0484fSRodney W. Grimes * This code is derived from software contributed to Berkeley by
858f0484fSRodney W. Grimes * Chris Torek.
958f0484fSRodney W. Grimes *
1058f0484fSRodney W. Grimes * Redistribution and use in source and binary forms, with or without
1158f0484fSRodney W. Grimes * modification, are permitted provided that the following conditions
1258f0484fSRodney W. Grimes * are met:
1358f0484fSRodney W. Grimes * 1. Redistributions of source code must retain the above copyright
1458f0484fSRodney W. Grimes * notice, this list of conditions and the following disclaimer.
1558f0484fSRodney W. Grimes * 2. Redistributions in binary form must reproduce the above copyright
1658f0484fSRodney W. Grimes * notice, this list of conditions and the following disclaimer in the
1758f0484fSRodney W. Grimes * documentation and/or other materials provided with the distribution.
181d8053c5SEd Maste * 3. Neither the name of the University nor the names of its contributors
1958f0484fSRodney W. Grimes * may be used to endorse or promote products derived from this software
2058f0484fSRodney W. Grimes * without specific prior written permission.
2158f0484fSRodney W. Grimes *
2258f0484fSRodney W. Grimes * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
2358f0484fSRodney W. Grimes * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
2458f0484fSRodney W. Grimes * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
2558f0484fSRodney W. Grimes * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
2658f0484fSRodney W. Grimes * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
2758f0484fSRodney W. Grimes * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
2858f0484fSRodney W. Grimes * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
2958f0484fSRodney W. Grimes * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
3058f0484fSRodney W. Grimes * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
3158f0484fSRodney W. Grimes * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
3258f0484fSRodney W. Grimes * SUCH DAMAGE.
3358f0484fSRodney W. Grimes */
3458f0484fSRodney W. Grimes
35d201fe46SDaniel Eischen #include <sys/types.h>
3658f0484fSRodney W. Grimes #include <stdio.h>
3758f0484fSRodney W. Grimes #include "local.h"
3858f0484fSRodney W. Grimes #include "glue.h"
3958f0484fSRodney W. Grimes
40ce51cf03SJames Raynard int
_fwalk(int (* function)(FILE *))415a6307cfSEd Maste _fwalk(int (*function)(FILE *))
4258f0484fSRodney W. Grimes {
43d201fe46SDaniel Eischen FILE *fp;
44d201fe46SDaniel Eischen int n, ret;
45d201fe46SDaniel Eischen struct glue *g;
4658f0484fSRodney W. Grimes
4758f0484fSRodney W. Grimes ret = 0;
48d201fe46SDaniel Eischen /*
49d201fe46SDaniel Eischen * It should be safe to walk the list without locking it;
50d201fe46SDaniel Eischen * new nodes are only added to the end and none are ever
51d201fe46SDaniel Eischen * removed.
5229ac6bd2SDaniel Eischen *
5329ac6bd2SDaniel Eischen * Avoid locking this list while walking it or else you will
5429ac6bd2SDaniel Eischen * introduce a potential deadlock in [at least] refill.c.
55d201fe46SDaniel Eischen */
5658f0484fSRodney W. Grimes for (g = &__sglue; g != NULL; g = g->next)
5758f0484fSRodney W. Grimes for (fp = g->iobs, n = g->niobs; --n >= 0; fp++)
5829ac6bd2SDaniel Eischen if ((fp->_flags != 0) && ((fp->_flags & __SIGN) == 0))
5958f0484fSRodney W. Grimes ret |= (*function)(fp);
6058f0484fSRodney W. Grimes return (ret);
6158f0484fSRodney W. Grimes }
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