90c68c1799
files after a seekdir(). The seekdir shall set the position for the next readdir operation. When the _readdir_unlocked() encounters deleted entry, dd_loc is already advanced. Continuing the loop leads to premature read of the target entry. Submitted by: Marc Balmer <mbalmer at openbsd org> Obtained from: OpenBSD MFC after: 2 weeks
67 lines
2.5 KiB
C
67 lines
2.5 KiB
C
/*
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* Copyright (c) 1983, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* Copyright (c) 2000
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* Daniel Eischen. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#ifndef _TELLDIR_H_
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#define _TELLDIR_H_
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#include <sys/queue.h>
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/*
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* One of these structures is malloced to describe the current directory
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* position each time telldir is called. It records the current magic
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* cookie returned by getdirentries and the offset within the buffer
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* associated with that return value.
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*/
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struct ddloc {
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LIST_ENTRY(ddloc) loc_lqe; /* entry in list */
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long loc_index; /* key associated with structure */
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long loc_seek; /* magic cookie returned by getdirentries */
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long loc_loc; /* offset of entry in buffer */
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};
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/*
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* One of these structures is malloced for each DIR to record telldir
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* positions.
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*/
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struct _telldir {
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LIST_HEAD(, ddloc) td_locq; /* list of locations */
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long td_loccnt; /* index of entry for sequential readdir's */
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};
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struct dirent *_readdir_unlocked(DIR *, int);
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void _reclaim_telldir(DIR *);
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void _seekdir(DIR *, long);
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#endif
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