1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
|
/* Copyright (C) 1991, 1992, 1993, 1994, 1995 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Library General Public License as
published by the Free Software Foundation; either version 2 of the
License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Library General Public License for more details.
You should have received a copy of the GNU Library General Public
License along with the GNU C Library; see the file COPYING.LIB. If
not, write to the, 1992 Free Software Foundation, Inc., 675 Mass Ave,
Cambridge, MA 02139, USA. */
/*
* POSIX Standard: 5.1.2 Directory Operations <dirent.h>
*/
#ifndef _DIRENT_H
#define _DIRENT_H 1
#include <features.h>
__BEGIN_DECLS
#include <gnu/types.h>
/* Directory entry structure.
This structure is laid out identically to the `struct direct' that
represents directory entries in the GNU Hurd and in BSD 4.4 (and
incidentally, on disk in the Berkeley fast file system). The `readdir'
implementations for GNU and BSD know this; you must change them if you
change this structure. */
struct dirent
{
__ino_t d_fileno; /* File serial number. */
unsigned short int d_reclen; /* Length of the whole `struct dirent'. */
unsigned char d_type; /* File type, possibly unknown. */
unsigned char d_namlen; /* Length of the file name. */
/* Only this member is in the POSIX standard. */
char d_name[1]; /* File name (actually longer). */
};
#if defined(__USE_BSD) || defined(__USE_MISC)
#define d_ino d_fileno /* Backward compatibility. */
#endif
#ifdef __USE_BSD
/* File types for `d_type'. */
enum
{
DT_UNKNOWN = 0,
DT_FIFO = 1,
DT_CHR = 2,
DT_DIR = 4,
DT_BLK = 6,
DT_REG = 8,
DT_LNK = 10,
DT_SOCK = 12
};
/* Convert between stat structure types and directory types. */
#define IFTODT(mode) (((mode) & 0170000) >> 12)
#define DTTOIF(dirtype) ((dirtype) << 12)
#endif
/* This is the data type of directory stream objects.
The actual structure is opaque to users. */
typedef struct __dirstream DIR;
/* Open a directory stream on NAME.
Return a DIR stream on the directory, or NULL if it could not be opened. */
extern DIR *opendir __P ((__const char *__name));
/* Close the directory stream DIRP.
Return 0 if successful, -1 if not. */
extern int closedir __P ((DIR * __dirp));
/* Read a directory entry from DIRP.
Return a pointer to a `struct dirent' describing the entry,
or NULL for EOF or error. The storage returned may be overwritten
by a later readdir call on the same DIR stream. */
extern struct dirent *readdir __P ((DIR * __dirp));
/* Rewind DIRP to the beginning of the directory. */
extern void rewinddir __P ((DIR * __dirp));
#if defined(__USE_BSD) || defined(__USE_MISC)
/* Return the file descriptor used by DIRP. */
extern int dirfd __P ((DIR *__dirp));
#if defined (__OPTIMIZE__) && defined (_DIR_dirfd)
#define dirfd(dirp) _DIR_dirfd (dirp)
#endif
#ifndef MAXNAMLEN
/* Get the definitions of the POSIX.1 limits. */
#include <posix1_lim.h>
/* `MAXNAMLEN' is the BSD name for what POSIX calls `NAME_MAX'. */
#ifdef NAME_MAX
#define MAXNAMLEN NAME_MAX
#else
#define MAXNAMLEN 255
#endif
#endif
#include <gnu/types.h>
#define __need_size_t
#include <stddef.h>
/* Seek to position POS on DIRP. */
extern void seekdir __P ((DIR * __dirp, __off_t __pos));
/* Return the current position of DIRP. */
extern __off_t telldir __P ((DIR * __dirp));
/* Scan the directory DIR, calling SELECT on each directory entry.
Entries for which SELECT returns nonzero are individually malloc'd,
sorted using qsort with CMP, and collected in a malloc'd array in
*NAMELIST. Returns the number of entries selected, or -1 on error. */
extern int scandir __P ((__const char *__dir,
struct dirent ***__namelist,
int (*__select) __P ((struct dirent *)),
int (*__cmp) __P ((__const __ptr_t,
__const __ptr_t))));
/* Function to compare two `struct dirent's alphabetically. */
extern int alphasort __P ((__const __ptr_t, __const __ptr_t));
/* Read directory entries from FD into BUF, reading at most NBYTES.
Reading starts at offset *BASEP, and *BASEP is updated with the new
position after reading. Returns the number of bytes read; zero when at
end of directory; or -1 for errors. */
extern __ssize_t __getdirentries __P ((int __fd, char *__buf,
size_t __nbytes, __off_t *__basep));
extern __ssize_t getdirentries __P ((int __fd, char *__buf,
size_t __nbytes, __off_t *__basep));
#endif /* Use BSD or misc. */
__END_DECLS
#endif /* dirent.h */
|
