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
130 lines
4.7 KiB
C
130 lines
4.7 KiB
C
/* $NetBSD: dirent.h,v 1.28 2011/09/27 01:40:32 christos Exp $ */
|
|
|
|
/*-
|
|
* Copyright (c) 1989, 1993
|
|
* The Regents of the University of California. All rights reserved.
|
|
*
|
|
* 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.
|
|
*
|
|
* @(#)dirent.h 8.3 (Berkeley) 8/10/94
|
|
*/
|
|
|
|
#ifndef _SYS_DIRENT_H_
|
|
#define _SYS_DIRENT_H_
|
|
|
|
#include <sys/featuretest.h>
|
|
|
|
/*
|
|
* The dirent structure defines the format of directory entries returned by
|
|
* the getdents(2) system call.
|
|
*
|
|
* A directory entry has a struct dirent at the front of it, containing its
|
|
* inode number, the length of the entry, and the length of the name
|
|
* contained in the entry. These are followed by the name padded to
|
|
* _DIRENT_ALIGN() byte boundary with null bytes. All names are guaranteed
|
|
* NUL terminated. The maximum length of a name in a directory is MAXNAMLEN.
|
|
*/
|
|
struct dirent {
|
|
ino_t d_fileno; /* file number of entry */
|
|
uint16_t d_reclen; /* length of this record */
|
|
uint16_t d_namlen; /* length of string in d_name */
|
|
uint8_t d_type; /* file type, see below */
|
|
#if defined(_NETBSD_SOURCE)
|
|
#define MAXNAMLEN 511 /* must be kept in sync with NAME_MAX */
|
|
char d_name[MAXNAMLEN + 1]; /* name must be no longer than this */
|
|
#else
|
|
char d_name[511 + 1]; /* name must be no longer than this */
|
|
#endif
|
|
};
|
|
|
|
#if defined(_NETBSD_SOURCE)
|
|
/*
|
|
* File types
|
|
*/
|
|
#define DT_UNKNOWN 0
|
|
#define DT_FIFO 1
|
|
#define DT_CHR 2
|
|
#define DT_DIR 4
|
|
#define DT_BLK 6
|
|
#define DT_REG 8
|
|
#define DT_LNK 10
|
|
#define DT_SOCK 12
|
|
#define DT_WHT 14
|
|
|
|
/*
|
|
* Caution: the following macros are used by the ufs/ffs code on ffs's
|
|
* struct direct as well as the exposed struct dirent. The two
|
|
* structures are not the same, so it's important (until ufs is fixed,
|
|
* XXX) that the macro definitions remain type-polymorphic.
|
|
*/
|
|
|
|
/*
|
|
* The _DIRENT_ALIGN macro returns the alignment of struct dirent.
|
|
* struct direct and struct dirent12 used 4 byte alignment but
|
|
* struct dirent uses 8.
|
|
*/
|
|
#define _DIRENT_ALIGN(dp) (sizeof((dp)->d_fileno) - 1)
|
|
/*
|
|
* The _DIRENT_NAMEOFF macro returns the offset of the d_name field in
|
|
* struct dirent
|
|
*/
|
|
#if __GNUC_PREREQ__(4, 0)
|
|
#define _DIRENT_NAMEOFF(dp) __builtin_offsetof(__typeof__(*dp), d_name)
|
|
#else
|
|
#define _DIRENT_NAMEOFF(dp) \
|
|
((char *)(void *)&(dp)->d_name - (char *)(void *)dp)
|
|
#endif
|
|
/*
|
|
* The _DIRENT_RECLEN macro gives the minimum record length which will hold
|
|
* a name of size "namlen". This requires the amount of space in struct dirent
|
|
* without the d_name field, plus enough space for the name with a terminating
|
|
* null byte (namlen+1), rounded up to a the appropriate byte boundary.
|
|
*/
|
|
#define _DIRENT_RECLEN(dp, namlen) \
|
|
((_DIRENT_NAMEOFF(dp) + (namlen) + 1 + _DIRENT_ALIGN(dp)) & \
|
|
~_DIRENT_ALIGN(dp))
|
|
/*
|
|
* The _DIRENT_SIZE macro returns the minimum record length required for
|
|
* name name stored in the current record.
|
|
*/
|
|
#define _DIRENT_SIZE(dp) _DIRENT_RECLEN(dp, (dp)->d_namlen)
|
|
/*
|
|
* The _DIRENT_NEXT macro advances to the next dirent record.
|
|
*/
|
|
#define _DIRENT_NEXT(dp) ((void *)((char *)(void *)(dp) + (dp)->d_reclen))
|
|
/*
|
|
* The _DIRENT_MINSIZE returns the size of an empty (invalid) record.
|
|
*/
|
|
#define _DIRENT_MINSIZE(dp) _DIRENT_RECLEN(dp, 0)
|
|
|
|
/*
|
|
* Convert between stat structure types and directory types.
|
|
*/
|
|
#define IFTODT(mode) (((mode) & 0170000) >> 12)
|
|
#define DTTOIF(dirtype) ((dirtype) << 12)
|
|
#endif
|
|
|
|
#endif /* !_SYS_DIRENT_H_ */
|