IABSD.fr/src/lib/libc/stdio/fwalk.c

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• Author : guenther
  Date : 2016-05-23 00:21:48
  Hash : a9c2ddde
  Message : Make _fwalk and _cleanup completely internal to libc ok deraadt@

• lib/libc/stdio/fwalk.c

• /*	$OpenBSD: fwalk.c,v 1.12 2016/05/23 00:21:48 guenther Exp $ */
  /*-
   * Copyright (c) 1990, 1993
   *	The Regents of the University of California.  All rights reserved.
   *
   * This code is derived from software contributed to Berkeley by
   * Chris Torek.
   *
   * Redistribution and use in source and binary forms, with or without
   * modification, are permitted provided that the following conditions
   * are met:
   * 1. Redistributions of source code must retain the above copyright
   *    notice, this list of conditions and the following disclaimer.
   * 2. Redistributions in binary form must reproduce the above copyright
   *    notice, this list of conditions and the following disclaimer in the
   *    documentation and/or other materials provided with the distribution.
   * 3. Neither the name of the University nor the names of its contributors
   *    may be used to endorse or promote products derived from this software
   *    without specific prior written permission.
   *
   * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
   * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
   * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
   * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
   * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
   * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
   * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
   * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
   * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
   * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
   * SUCH DAMAGE.
   */
  
  #include <errno.h>
  #include <stdio.h>
  #include "local.h"
  #include "glue.h"
  
  int
  _fwalk(int (*function)(FILE *))
  {
  	FILE *fp;
  	int n, ret;
  	struct glue *g;
  
  	ret = 0;
  	for (g = &__sglue; g != NULL; g = g->next)
  		for (fp = g->iobs, n = g->niobs; --n >= 0; fp++) {
  			if ((fp->_flags != 0) && ((fp->_flags & __SIGN) == 0))
  				ret |= (*function)(fp);
  		}
  	return (ret);
  }