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62ca95721a
- Basically maintain a hidden DIR* inside fhandlers. - lseek has to be tweaked to allow basic seeking on the directory descriptor. - the current implementation does not keep the dir positions between duplicated descriptor in sync. In fact, every descriptor keeps its own copy of the DIR* and after dup/fork/exec, the directory position is reset to 0, i. e., to the start of the directory, as if rewinddir() has been called on the new descriptors. While this behaviour isn't yet covered by the Issue 8 draft, a bug report along these lines exists and will probably be picked up for TC1. Signed-off-by: Corinna Vinschen <corinna@vinschen.de>
89 lines
3.1 KiB
C
89 lines
3.1 KiB
C
/*-
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* SPDX-License-Identifier: BSD-3-Clause
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*
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* Copyright (c) 1989, 1993
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* The Regents of the University of California. 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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* @(#)dirent.h 8.3 (Berkeley) 8/10/94
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* $FreeBSD: head/include/dirent.h 326024 2017-11-20 19:45:28Z pfg $
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*/
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#ifndef _DIRENT_H_
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#define _DIRENT_H_
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#include <sys/cdefs.h>
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#include <sys/dirent.h>
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#if !defined(MAXNAMLEN) && __BSD_VISIBLE
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#define MAXNAMLEN 1024
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#endif
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__BEGIN_DECLS
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#if __MISC_VISIBLE || __POSIX_VISIBLE >= 200809 || __XSI_VISIBLE >= 700
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int alphasort(const struct dirent **, const struct dirent **);
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int dirfd(DIR *);
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#endif
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#if __BSD_VISIBLE
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int fdclosedir(DIR *);
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#endif
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DIR *opendir(const char *);
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DIR *fdopendir(int);
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struct dirent *
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readdir(DIR *);
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#if __POSIX_VISIBLE >= 199506 || __XSI_VISIBLE >= 500
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int readdir_r(DIR *__restrict, struct dirent *__restrict,
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struct dirent **__restrict);
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#endif
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void rewinddir(DIR *);
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#if __MISC_VISIBLE || __POSIX_VISIBLE >= 200809 || __XSI_VISIBLE >= 700
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int scandir(const char *, struct dirent ***,
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int (*)(const struct dirent *), int (*)(const struct dirent **,
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const struct dirent **));
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#endif
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#ifdef _LIBC
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void _seekdir(DIR *, long);
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#endif
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#if __MISC_VISIBLE || __XSI_VISIBLE
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#ifndef __INSIDE_CYGWIN__
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void seekdir(DIR *, long);
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long telldir(DIR *);
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#endif
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#endif
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int closedir(DIR *);
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#if __GNU_VISIBLE
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int scandirat(int, const char *, struct dirent ***,
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int (*) (const struct dirent *), int (*) (const struct dirent **,
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const struct dirent **));
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int versionsort(const struct dirent **, const struct dirent **);
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#endif
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#if __POSIX_VISIBLE >= 200809
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ssize_t posix_getdents(int, void *, size_t, int);
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#endif /* __POSIX_VISIBLE >= 200809 */
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__END_DECLS
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#endif /*_DIRENT_H_*/
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