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CloverBootloader/FileSystems/VBoxFsDxe/fsw_core.h

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initial commit Clover sources 5061 and modules from EDK2 latest with legacy codes from UDK2018 Signed-off-by: Sergey Isakov <isakov-sl@bk.ru>
2019-09-03 11:58:42 +02:00
/* $Id: fsw_core.h 33540 2010-10-28 09:27:05Z vboxsync $ */
/** @file
* fsw_core.h - Core file system wrapper abstraction layer header.
*/
/*
* Copyright (C) 2010-2012 Oracle Corporation
*
* This file is part of VirtualBox Open Source Edition (OSE), as
* available from http://www.virtualbox.org. This file is free software;
* you can redistribute it and/or modify it under the terms of the GNU
* General Public License (GPL) as published by the Free Software
* Foundation, in version 2 as it comes in the "COPYING" file of the
* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
*/
/*-
* This code is based on:
*
* Copyright (c) 2006 Christoph Pfisterer
* Portions Copyright (c) The Regents of the University of California.
* Portions Copyright (c) UNIX System Laboratories, Inc.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* * Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
*
* * 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.
*
* * Neither the name of Christoph Pfisterer nor the names of the
* contributors may be used to endorse or promote products derived
* from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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 COPYRIGHT
* OWNER 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.
*/
#ifndef _FSW_CORE_H_
#define _FSW_CORE_H_
#include "fsw_base.h"
extern const char* fsw_errors[];
#ifndef FSW_DNODE_CACHE_SIZE
#define FSW_DNODE_CACHE_SIZE (0)
#endif
/** Maximum size for a path, specifically symlink target paths. */
#ifndef VBOX
#define FSW_PATH_MAX (4096)
#else
/* Too big allocations are handled with alloca() */
#define FSW_PATH_MAX (2048)
#endif
/** Helper macro for token concatenation. */
#define FSW_CONCAT3(a,b,c) a##b##c
/** Expands to the name of a fstype dispatch table (fsw_fstype_table) for a named file system type. */
#define FSW_FSTYPE_TABLE_NAME(t) FSW_CONCAT3(fsw_,t,_table)
/** Indicates that the block cache entry is empty. */
#define FSW_INVALID_BNO (~0UL)
#define USE_FULL_LOWERCASE 0
//
// Byte-swapping macros
//
/**
* \name Byte Order Macros
* Implements big endian vs. little endian awareness and conversion.
*/
/*@{*/
typedef fsw_u16 fsw_u16_le;
typedef fsw_u16 fsw_u16_be;
typedef fsw_u32 fsw_u32_le;
typedef fsw_u32 fsw_u32_be;
typedef fsw_u64 fsw_u64_le;
typedef fsw_u64 fsw_u64_be;
#define FSW_SWAPVALUE_U16(v) ((((fsw_u16)(v) & 0xff00) >> 8) | \
(((fsw_u16)(v) & 0x00ff) << 8))
#define FSW_SWAPVALUE_U32(v) ((((fsw_u32)(v) & 0xff000000UL) >> 24) | \
(((fsw_u32)(v) & 0x00ff0000UL) >> 8) | \
(((fsw_u32)(v) & 0x0000ff00UL) << 8) | \
(((fsw_u32)(v) & 0x000000ffUL) << 24))
#define FSW_SWAPVALUE_U64(v) ((((fsw_u64)(v) & 0xff00000000000000ULL) >> 56) | \
(((fsw_u64)(v) & 0x00ff000000000000ULL) >> 40) | \
(((fsw_u64)(v) & 0x0000ff0000000000ULL) >> 24) | \
(((fsw_u64)(v) & 0x000000ff00000000ULL) >> 8) | \
(((fsw_u64)(v) & 0x00000000ff000000ULL) << 8) | \
(((fsw_u64)(v) & 0x0000000000ff0000ULL) << 24) | \
(((fsw_u64)(v) & 0x000000000000ff00ULL) << 40) | \
(((fsw_u64)(v) & 0x00000000000000ffULL) << 56))
#ifdef FSW_LITTLE_ENDIAN
#define fsw_u16_le_swap(v) (v)
#define fsw_u16_be_swap(v) FSW_SWAPVALUE_U16(v)
#define fsw_u32_le_swap(v) (v)
#define fsw_u32_be_swap(v) FSW_SWAPVALUE_U32(v)
#define fsw_u64_le_swap(v) (v)
#define fsw_u64_be_swap(v) FSW_SWAPVALUE_U64(v)
#define fsw_u16_le_sip(var)
#define fsw_u16_be_sip(var) (var = FSW_SWAPVALUE_U16(var))
#define fsw_u32_le_sip(var)
#define fsw_u32_be_sip(var) (var = FSW_SWAPVALUE_U32(var))
#define fsw_u64_le_sip(var)
#define fsw_u64_be_sip(var) (var = FSW_SWAPVALUE_U64(var))
#else
#ifdef FSW_BIG_ENDIAN
#define fsw_u16_le_swap(v) FSW_SWAPVALUE_U16(v)
#define fsw_u16_be_swap(v) (v)
#define fsw_u32_le_swap(v) FSW_SWAPVALUE_U32(v)
#define fsw_u32_be_swap(v) (v)
#define fsw_u64_le_swap(v) FSW_SWAPVALUE_U64(v)
#define fsw_u64_be_swap(v) (v)
#define fsw_u16_le_sip(var) (var = FSW_SWAPVALUE_U16(var))
#define fsw_u16_be_sip(var)
#define fsw_u32_le_sip(var) (var = FSW_SWAPVALUE_U32(var))
#define fsw_u32_be_sip(var)
#define fsw_u64_le_sip(var) (var = FSW_SWAPVALUE_U64(var))
#define fsw_u64_be_sip(var)
#else
#fail Neither FSW_BIG_ENDIAN nor FSW_LITTLE_ENDIAN are defined
#endif
#endif
/*@}*/
//
// The following evil hack avoids a lot of casts between generic and fstype-specific
// structures.
//
#ifndef VOLSTRUCTNAME
#define VOLSTRUCTNAME fsw_volume
#else
struct VOLSTRUCTNAME;
#endif
#ifndef DNODESTRUCTNAME
#define DNODESTRUCTNAME fsw_dnode
#else
struct DNODESTRUCTNAME;
#endif
/**
* Status code type, returned from all functions that can fail.
*/
typedef int fsw_status_t;
/**
* Possible status codes.
*/
enum {
FSW_SUCCESS,
FSW_OUT_OF_MEMORY = 1,
FSW_IO_ERROR = 2,
FSW_UNSUPPORTED = 3,
FSW_NOT_FOUND = 4,
FSW_VOLUME_CORRUPTED = 5,
FSW_UNKNOWN_ERROR
};
//#define RETURN_WARN_UNKNOWN_GLYPH ENCODE_WARNING (1)
//#define RETURN_WARN_DELETE_FAILURE ENCODE_WARNING (2)
//#define RETURN_WARN_WRITE_FAILURE ENCODE_WARNING (3)
//#define RETURN_WARN_BUFFER_TOO_SMALL ENCODE_WARNING (4)
//#define RETURN_WARN_STALE_DATA ENCODE_WARNING (5)
//#define RETURN_SUCCESS 0
//#define RETURN_LOAD_ERROR ENCODE_ERROR (1)
//#define RETURN_INVALID_PARAMETER ENCODE_ERROR (2)
//#define RETURN_UNSUPPORTED ENCODE_ERROR (3)
//#define RETURN_BAD_BUFFER_SIZE ENCODE_ERROR (4)
//#define RETURN_BUFFER_TOO_SMALL ENCODE_ERROR (5)
//#define RETURN_NOT_READY ENCODE_ERROR (6)
//#define RETURN_DEVICE_ERROR ENCODE_ERROR (7)
//#define RETURN_WRITE_PROTECTED ENCODE_ERROR (8)
//#define RETURN_OUT_OF_RESOURCES ENCODE_ERROR (9)
//#define RETURN_VOLUME_CORRUPTED ENCODE_ERROR (10)
//#define RETURN_END_OF_FILE ENCODE_ERROR (31)
//#define RETURN_NOT_FOUND ENCODE_ERROR (14)
//#define RETURN_ACCESS_DENIED ENCODE_ERROR (15)
/**
* Core: A string with explicit length and encoding information.
*/
struct fsw_string {
int type; //!< Encoding of the string - empty, ISO-8859-1, UTF8, UTF16
int len; //!< Length in characters
int size; //!< Total data size in bytes
void *data; //!< Data pointer (may be NULL if type is EMPTY or len is zero)
};
/**
* Possible string types / encodings. In the case of FSW_STRING_TYPE_EMPTY,
* all other members of the fsw_string structure may be invalid.
*/
enum {
FSW_STRING_TYPE_EMPTY,
FSW_STRING_TYPE_ISO88591,
FSW_STRING_TYPE_UTF8,
FSW_STRING_TYPE_UTF16,
FSW_STRING_TYPE_UTF16_SWAPPED
};
#ifdef FSW_LITTLE_ENDIAN
#define FSW_STRING_TYPE_UTF16_LE FSW_STRING_TYPE_UTF16
#define FSW_STRING_TYPE_UTF16_BE FSW_STRING_TYPE_UTF16_SWAPPED
#else
#define FSW_STRING_TYPE_UTF16_LE FSW_STRING_TYPE_UTF16_SWAPPED
#define FSW_STRING_TYPE_UTF16_BE FSW_STRING_TYPE_UTF16
#endif
/** Static initializer for an empty string. */
#define FSW_STRING_INIT { FSW_STRING_TYPE_EMPTY, 0, 0, NULL }
/* forward declarations */
struct fsw_dnode;
struct fsw_host_table;
struct fsw_fstype_table;
struct fsw_blockcache {
fsw_u32 refcount; //!< Reference count
fsw_u32 cache_level; //!< Level of importance of this block
fsw_u32 phys_bno; //!< Physical block number
void *data; //!< Block data buffer
};
/**
* Core: Represents a mounted volume.
*/
struct fsw_volume {
fsw_u32 phys_blocksize; //!< Block size for disk access / file system structures
fsw_u32 log_blocksize; //!< Block size for logical file data
struct DNODESTRUCTNAME *root; //!< Root directory dnode
struct fsw_string label; //!< Volume label
struct fsw_dnode *dnode_head; //!< List of all dnodes allocated for this volume
struct fsw_blockcache *bcache; //!< Array of block cache entries
fsw_u32 bcache_size; //!< Number of entries in the block cache array
void *host_data; //!< Hook for a host-specific data structure
struct fsw_host_table *host_table; //!< Dispatch table for host-specific functions
struct fsw_fstype_table *fstype_table; //!< Dispatch table for file system specific functions
int host_string_type; //!< String type used by the host environment
};
/**
* Core: Represents a "directory node" - a file, directory, symlink, whatever.
*/
struct fsw_dnode {
fsw_u32 refcount; //!< Reference count
struct VOLSTRUCTNAME *vol; //!< The volume this dnode belongs to
struct DNODESTRUCTNAME *parent; //!< Parent directory dnode
struct fsw_string name; //!< Name of this item in the parent directory
fsw_u32 dnode_id; //!< Unique id number (usually the inode number)
int type; //!< Type of the dnode - file, dir, symlink, special
fsw_u64 size; //!< Data size in bytes
struct fsw_dnode *next; //!< Doubly-linked list of all dnodes: previous dnode
struct fsw_dnode *prev; //!< Doubly-linked list of all dnodes: next dnode
fsw_u32 numcslots; //!< Number of slots occupied
#if defined(FSW_DNODE_CACHE_SIZE) && (FSW_DNODE_CACHE_SIZE > 0)
struct fsw_dnode *cache[FSW_DNODE_CACHE_SIZE]; //!< Rudimentary cache for directory lookups
#endif
};
/**
* Possible dnode types. FSW_DNODE_TYPE_UNKNOWN may only be used before
* fsw_dnode_fill has been called on the dnode.
*/
enum {
FSW_DNODE_TYPE_UNKNOWN,
FSW_DNODE_TYPE_FILE,
FSW_DNODE_TYPE_DIR,
FSW_DNODE_TYPE_SYMLINK,
FSW_DNODE_TYPE_SPECIAL
};
/**
* Core: Stores the mapping of a region of a file to the data on disk.
*/
struct fsw_extent {
int type; //!< Type of extent specification
fsw_u32 log_start; //!< Starting logical block number
fsw_u32 log_count; //!< Logical block count
fsw_u32 phys_start; //!< Starting physical block number (for FSW_EXTENT_TYPE_PHYSBLOCK only)
void *buffer; //!< Allocated buffer pointer (for FSW_EXTENT_TYPE_BUFFER only)
};
/**
* Possible extent representation types. FSW_EXTENT_TYPE_INVALID is for shandle's
* internal use only, it must not be returned from a get_extent function.
*/
enum {
FSW_EXTENT_TYPE_INVALID,
FSW_EXTENT_TYPE_SPARSE,
FSW_EXTENT_TYPE_PHYSBLOCK,
FSW_EXTENT_TYPE_BUFFER
};
/**
* Core: An access structure to a dnode's raw data. There can be multiple
* shandles per dnode, each of them has its own position pointer.
*/
struct fsw_shandle {
struct fsw_dnode *dnode; //!< The dnode this handle reads data from
fsw_u64 pos; //!< Current file pointer in bytes
struct fsw_extent extent; //!< Current extent
};
/**
* Core: Used in gathering detailed information on a volume.
*/
struct fsw_volume_stat {
fsw_u64 total_bytes; //!< Total size of data area size in bytes
fsw_u64 free_bytes; //!< Bytes still available for storing file data
};
/**
* Core: Used in gathering detailed information on a dnode.
*/
struct fsw_dnode_stat_str {
fsw_u64 used_bytes; //!< Bytes actually used by the file on disk
void (*store_time_posix)(struct fsw_dnode_stat_str *sb, int which, fsw_u32 posix_time); //!< Callback for storing a Posix-style timestamp
void (*store_attr_posix)(struct fsw_dnode_stat_str *sb, fsw_u16 posix_mode); //!< Callback for storing a Posix-style file mode
void *host_data; //!< Hook for a host-specific data structure
};
/**
* Type of the timestamp passed into store_time_posix.
*/
enum {
FSW_DNODE_STAT_CTIME,
FSW_DNODE_STAT_MTIME,
FSW_DNODE_STAT_ATIME
};
/**
* Core: Function table for a host environment.
*/
struct fsw_host_table
{
int native_string_type; //!< String type used by the host environment
void (*change_blocksize)(struct fsw_volume *vol,
fsw_u32 old_phys_blocksize, fsw_u32 old_log_blocksize,
fsw_u32 new_phys_blocksize, fsw_u32 new_log_blocksize);
fsw_status_t (*read_block)(struct fsw_volume *vol, fsw_u32 phys_bno, void *buffer);
};
/**
* Core: Function table for a file system driver.
*/
struct fsw_fstype_table
{
struct fsw_string name; //!< String giving the name of the file system
fsw_u32 volume_struct_size; //!< Size for allocating the fsw_volume structure
fsw_u32 dnode_struct_size; //!< Size for allocating the fsw_dnode structure
fsw_status_t (*volume_mount)(struct VOLSTRUCTNAME *vol);
void (*volume_free)(struct VOLSTRUCTNAME *vol);
fsw_status_t (*volume_stat)(struct VOLSTRUCTNAME *vol, struct fsw_volume_stat *sb);
fsw_status_t (*dnode_fill)(struct VOLSTRUCTNAME *vol, struct DNODESTRUCTNAME *dno);
void (*dnode_free)(struct VOLSTRUCTNAME *vol, struct DNODESTRUCTNAME *dno);
fsw_status_t (*dnode_stat)(struct VOLSTRUCTNAME *vol, struct DNODESTRUCTNAME *dno,
struct fsw_dnode_stat_str *sb);
fsw_status_t (*get_extent)(struct VOLSTRUCTNAME *vol, struct DNODESTRUCTNAME *dno,
struct fsw_extent *extent);
fsw_status_t (*dir_lookup)(struct VOLSTRUCTNAME *vol, struct DNODESTRUCTNAME *dno,
struct fsw_string *lookup_name, struct DNODESTRUCTNAME **child_dno);
fsw_status_t (*dir_read)(struct VOLSTRUCTNAME *vol, struct DNODESTRUCTNAME *dno,
struct fsw_shandle *shand, struct DNODESTRUCTNAME **child_dno);
fsw_status_t (*readlink)(struct VOLSTRUCTNAME *vol, struct DNODESTRUCTNAME *dno,
struct fsw_string *link_target);
};
/**
* \name Volume Functions
*/
/*@{*/
fsw_status_t fsw_mount(void *host_data,
struct fsw_host_table *host_table,
struct fsw_fstype_table *fstype_table,
struct fsw_volume **vol_out);
void fsw_unmount(struct fsw_volume *vol);
fsw_status_t fsw_volume_stat(struct fsw_volume *vol, struct fsw_volume_stat *sb);
static inline struct fsw_volume* SafeCast1(struct VOLSTRUCTNAME* x) { return (struct fsw_volume*) x; }
static inline struct fsw_dnode* SafeCast2(struct DNODESTRUCTNAME* x) { return (struct fsw_dnode*) x; }
static inline struct fsw_dnode** SafeCast3(struct DNODESTRUCTNAME** x) { return (struct fsw_dnode**) x; }
//void fsw_set_blocksize(struct VOLSTRUCTNAME *vol, fsw_u32 phys_blocksize, fsw_u32 log_blocksize);
#define fsw_set_blocksize(x, y, z) fsw_set_blocksize_(SafeCast1(x), (y), (z))
void fsw_set_blocksize_(struct fsw_volume *vol, fsw_u32 phys_blocksize, fsw_u32 log_blocksize);
//fsw_status_t fsw_block_get(struct VOLSTRUCTNAME *vol, fsw_u32 phys_bno, fsw_u32 cache_level, void **buffer_out);
#define fsw_block_get(x, y, z, w) fsw_block_get_(SafeCast1(x), (y), (z), (w))
fsw_status_t fsw_block_get_(struct fsw_volume *vol, fsw_u32 phys_bno, fsw_u32 cache_level, void **buffer_out);
//void fsw_block_release(struct VOLSTRUCTNAME *vol, fsw_u32 phys_bno, void *buffer);
#define fsw_block_release(x, y, z) fsw_block_release_(SafeCast1(x), (y), (z))
void fsw_block_release_(struct fsw_volume *vol, fsw_u32 phys_bno, void *buffer);
/*@}*/
/**
* \name dnode Functions
*/
/*@{*/
//fsw_status_t fsw_dnode_create_root(struct VOLSTRUCTNAME *vol, fsw_u32 dnode_id, struct DNODESTRUCTNAME **dno_out);
#define fsw_dnode_create_root(x, y, z) fsw_dnode_create_root_(SafeCast1(x), (y), SafeCast3(z))
fsw_status_t fsw_dnode_create_root_(struct fsw_volume *vol, fsw_u32 dnode_id, struct fsw_dnode **dno_out);
//fsw_status_t fsw_dnode_create(struct DNODESTRUCTNAME *parent_dno, fsw_u32 dnode_id, int type,
// struct fsw_string *name, struct DNODESTRUCTNAME **dno_out);
#define fsw_dnode_create(x, y, z, w, u) fsw_dnode_create_(SafeCast2(x), (y), (z), (w), SafeCast3(u))
fsw_status_t fsw_dnode_create_(struct fsw_dnode *parent_dno, fsw_u32 dnode_id, int type,
struct fsw_string *name, struct fsw_dnode **dno_out);
void fsw_dnode_retain(struct fsw_dnode *dno);
void fsw_dnode_release(struct fsw_dnode *dno);
fsw_status_t fsw_dnode_fill(struct fsw_dnode *dno);
fsw_status_t fsw_dnode_stat(struct fsw_dnode *dno, struct fsw_dnode_stat_str *sb);
fsw_status_t fsw_dnode_lookup_cache(struct fsw_dnode *dno,
struct fsw_string *lookup_name, struct fsw_dnode **child_dno_out);
fsw_status_t fsw_dnode_lookup(struct fsw_dnode *dno,
struct fsw_string *lookup_name, struct fsw_dnode **child_dno_out);
fsw_status_t fsw_dnode_lookup_path(struct fsw_dnode *dno,
struct fsw_string *lookup_path, char separator,
struct fsw_dnode **child_dno_out);
fsw_status_t fsw_dnode_dir_read(struct fsw_shandle *shand, struct fsw_dnode **child_dno_out);
fsw_status_t fsw_dnode_readlink(struct fsw_dnode *dno, struct fsw_string *link_target);
//fsw_status_t fsw_dnode_readlink_data(struct DNODESTRUCTNAME *dno, struct fsw_string *link_target);
#define fsw_dnode_readlink_data(x, y) fsw_dnode_readlink_data_(SafeCast2(x), (y))
fsw_status_t fsw_dnode_readlink_data_(struct fsw_dnode *dno, struct fsw_string *link_target);
fsw_status_t fsw_dnode_resolve(struct fsw_dnode *dno, struct fsw_dnode **target_dno_out);
/*@}*/
/**
* \name shandle Functions
*/
/*@{*/
//fsw_status_t fsw_shandle_open(struct DNODESTRUCTNAME *dno, struct fsw_shandle *shand);
#define fsw_shandle_open(x, y) fsw_shandle_open_(SafeCast2(x), (y))
fsw_status_t fsw_shandle_open_(struct fsw_dnode *dno, struct fsw_shandle *shand);
void fsw_shandle_close(struct fsw_shandle *shand);
fsw_status_t fsw_shandle_read(struct fsw_shandle *shand, fsw_u32 *buffer_size_inout, void *buffer);
/*@}*/
/**
* \name Memory Functions
*/
/*@{*/
fsw_status_t fsw_alloc_zero(int len, void **ptr_out);
fsw_status_t fsw_memdup(void **dest_out, void *src, int len);
/*@}*/
/**
* \name String Functions
*/
/*@{*/
int fsw_strlen(struct fsw_string *s);
int fsw_streq(struct fsw_string *s1, struct fsw_string *s2);
int fsw_streq_cstr(struct fsw_string *s1, const char *s2);
fsw_status_t fsw_strdup_coerce(struct fsw_string *dest, int type, struct fsw_string *src);
void fsw_strsplit(struct fsw_string *lookup_name, struct fsw_string *buffer, char separator);
void fsw_strfree(struct fsw_string *s);
fsw_u16 fsw_to_lower(fsw_u16 ch);
/*@}*/
/**
* \name Posix Mode Macros
* These macros can be used globally to test fields and bits in
* Posix-style modes.
*
* Taken from FreeBSD sys/stat.h.
*/
/*@{*/
#ifndef S_IRWXU
// this is octal data!!!!
#define S_ISUID 0004000 /* set user id on execution */
#define S_ISGID 0002000 /* set group id on execution */
#define S_ISTXT 0001000 /* sticky bit */
#define S_IRWXU 0000700 /* RWX mask for owner */
#define S_IRUSR 0000400 /* R for owner 0x0100 */
#define S_IWUSR 0000200 /* W for owner */
#define S_IXUSR 0000100 /* X for owner */
#define S_IRWXG 0000070 /* RWX mask for group */
#define S_IRGRP 0000040 /* R for group 0x0020 */
#define S_IWGRP 0000020 /* W for group */
#define S_IXGRP 0000010 /* X for group */
#define S_IRWXO 0000007 /* RWX mask for other */
#define S_IROTH 0000004 /* R for other */
#define S_IWOTH 0000002 /* W for other */
#define S_IXOTH 0000001 /* X for other */
#define S_IFMT 0170000 /* type of file mask */
#define S_IFIFO 0010000 /* named pipe (fifo) */
#define S_IFCHR 0020000 /* character special */
#define S_IFDIR 0040000 /* directory */
#define S_IFBLK 0060000 /* block special */
#define S_IFREG 0100000 /* regular 0x8000 */
#define S_IFLNK 0120000 /* symbolic link 0xA000 */
#define S_IFSOCK 0140000 /* socket */
#define S_ISVTX 0001000 /* save swapped text even after use */
#define S_IFWHT 0160000 /* whiteout */
#define S_ISDIR(m) (((m) & 0170000) == 0040000) /* directory */
#define S_ISCHR(m) (((m) & 0170000) == 0020000) /* char special */
#define S_ISBLK(m) (((m) & 0170000) == 0060000) /* block special */
#define S_ISREG(m) (((m) & 0170000) == 0100000) /* regular file */
#define S_ISFIFO(m) (((m) & 0170000) == 0010000) /* fifo or socket */
#define S_ISLNK(m) (((m) & 0170000) == 0120000) /* symbolic link */
#define S_ISSOCK(m) (((m) & 0170000) == 0140000) /* socket */
#define S_ISWHT(m) (((m) & 0170000) == 0160000) /* whiteout */
#define S_BLKSIZE 512 /* block size used in the stat struct */
#endif
/*@}*/
#endif
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