6c8f7fc3ba
. add all sys/sys headers not already present to help compiling . take netbsd dirent.h and struct dirent; main result is introducing d_type and d_namlen that have to be set by getdents() in all FS code implementing it . d_off is gone . alignment of the struct has become 8 bytes instead of 4 . remove _MAX_BLOCK_SIZE, _MIN_BLOCK_SIZE, _STATIC_BLOCK_SIZE . libminlib: cleanup unused yet duplicate code . mfs: throw out the long-broken v1, v2 support . new test for dirent contents filled by getdents() Change-Id: I1459755c7ba5e5d1c9396d3a587ce6e63ddc283e
129 lines
4.7 KiB
C
129 lines
4.7 KiB
C
/* $NetBSD: dirent.h,v 1.28 2011/09/27 01:40:32 christos Exp $ */
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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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*/
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#ifndef _SYS_DIRENT_H_
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#define _SYS_DIRENT_H_
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#include <sys/featuretest.h>
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/*
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* The dirent structure defines the format of directory entries returned by
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* the getdents(2) system call.
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*
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* A directory entry has a struct dirent at the front of it, containing its
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* inode number, the length of the entry, and the length of the name
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* contained in the entry. These are followed by the name padded to
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* _DIRENT_ALIGN() byte boundary with null bytes. All names are guaranteed
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* NUL terminated. The maximum length of a name in a directory is MAXNAMLEN.
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*/
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struct dirent {
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ino_t d_fileno; /* file number of entry */
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uint16_t d_reclen; /* length of this record */
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uint16_t d_namlen; /* length of string in d_name */
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uint8_t d_type; /* file type, see below */
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#if defined(_NETBSD_SOURCE)
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#define MAXNAMLEN 511 /* must be kept in sync with NAME_MAX */
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char d_name[MAXNAMLEN + 1]; /* name must be no longer than this */
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#else
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char d_name[511 + 1]; /* name must be no longer than this */
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#endif
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};
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#if defined(_NETBSD_SOURCE)
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/*
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* File types
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*/
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#define DT_UNKNOWN 0
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#define DT_FIFO 1
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#define DT_CHR 2
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#define DT_DIR 4
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#define DT_BLK 6
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#define DT_REG 8
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#define DT_LNK 10
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#define DT_SOCK 12
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#define DT_WHT 14
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/*
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* Caution: the following macros are used by the ufs/ffs code on ffs's
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* struct direct as well as the exposed struct dirent. The two
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* structures are not the same, so it's important (until ufs is fixed,
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* XXX) that the macro definitions remain type-polymorphic.
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*/
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/*
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* The _DIRENT_ALIGN macro returns the alignment of struct dirent.
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* struct direct and struct dirent12 used 4 byte alignment but
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* struct dirent uses 8.
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*/
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#define _DIRENT_ALIGN(dp) (sizeof((dp)->d_fileno) - 1)
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/*
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* The _DIRENT_NAMEOFF macro returns the offset of the d_name field in
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* struct dirent
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*/
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#if __GNUC_PREREQ__(4, 0)
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#define _DIRENT_NAMEOFF(dp) __builtin_offsetof(__typeof__(*dp), d_name)
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#else
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#define _DIRENT_NAMEOFF(dp) \
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((char *)(void *)&(dp)->d_name - (char *)(void *)dp)
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#endif
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/*
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* The _DIRENT_RECLEN macro gives the minimum record length which will hold
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* a name of size "namlen". This requires the amount of space in struct dirent
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* without the d_name field, plus enough space for the name with a terminating
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* null byte (namlen+1), rounded up to a the appropriate byte boundary.
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*/
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#define _DIRENT_RECLEN(dp, namlen) \
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((_DIRENT_NAMEOFF(dp) + (namlen) + 1 + _DIRENT_ALIGN(dp)) & \
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~_DIRENT_ALIGN(dp))
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/*
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* The _DIRENT_SIZE macro returns the minimum record length required for
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* name name stored in the current record.
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*/
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#define _DIRENT_SIZE(dp) _DIRENT_RECLEN(dp, (dp)->d_namlen)
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/*
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* The _DIRENT_NEXT macro advances to the next dirent record.
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*/
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#define _DIRENT_NEXT(dp) ((void *)((char *)(void *)(dp) + (dp)->d_reclen))
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/*
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* The _DIRENT_MINSIZE returns the size of an empty (invalid) record.
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*/
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#define _DIRENT_MINSIZE(dp) _DIRENT_RECLEN(dp, 0)
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/*
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* Convert between stat structure types and directory types.
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*/
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#define IFTODT(mode) (((mode) & 0170000) >> 12)
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#define DTTOIF(dirtype) ((dirtype) << 12)
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#endif
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#endif /* !_SYS_DIRENT_H_ */
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