1 .\" Copyright (c) 1989, 1991, 1993
2 .\" The Regents of the University of California. All rights reserved.
4 .\" Redistribution and use in source and binary forms, with or without
5 .\" modification, are permitted provided that the following conditions
7 .\" 1. Redistributions of source code must retain the above copyright
8 .\" notice, this list of conditions and the following disclaimer.
9 .\" 2. Redistributions in binary form must reproduce the above copyright
10 .\" notice, this list of conditions and the following disclaimer in the
11 .\" documentation and/or other materials provided with the distribution.
12 .\" 3. All advertising materials mentioning features or use of this software
13 .\" must display the following acknowledgement:
14 .\" This product includes software developed by the University of
15 .\" California, Berkeley and its contributors.
16 .\" 4. Neither the name of the University nor the names of its contributors
17 .\" may be used to endorse or promote products derived from this software
18 .\" without specific prior written permission.
20 .\" THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
21 .\" ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
22 .\" IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
23 .\" ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
24 .\" FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
25 .\" DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
26 .\" OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
27 .\" HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
28 .\" LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
29 .\" OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 .\" @(#)getdirentries.2 8.2 (Berkeley) 5/3/95
33 .\" $FreeBSD: src/lib/libc/sys/getdirentries.2,v 1.12.2.6 2001/12/14 18:34:00 ru Exp $
41 .Nd "get directory entries in a filesystem independent format"
48 .Fn getdirentries "int fd" "char *buf" "int nbytes" "long *basep"
50 .Fn getdents "int fd" "char *buf" "int nbytes"
56 functions read directory entries from the directory
57 referenced by the file descriptor
59 into the buffer pointed to by
61 in a filesystem independent format.
64 of data will be transferred.
67 argument must be greater than or equal to the
68 block size associated with the file,
71 Some filesystems may not support these functions
72 with buffers smaller than this size.
74 The data in the buffer is a series of
76 structures each containing the following entries:
77 .Bd -literal -offset indent
82 char d_name[MAXNAMELEN + 1]; /* see below */
87 entry is a number which is unique for each
88 distinct file in the filesystem.
89 Files that are linked by hard links (see
95 entry is the length, in bytes, of the directory record.
98 entry is the type of the file pointed to by the directory record.
99 The file type values are defined in
103 entry contains a null terminated file name.
106 entry specifies the length of the file name excluding the null byte.
107 Thus the actual size of
113 Entries may be separated by extra space.
116 entry may be used as an offset from the start of a
118 structure to the next structure, if any.
120 The actual number of bytes transferred is returned.
121 The current position pointer associated with
123 is set to point to the next block of entries.
124 The pointer may not advance by the number of bytes returned by
128 A value of zero is returned when
129 the end of the directory has been reached.
133 function writes the position of the block read into the location pointed to by
135 Alternatively, the current position pointer may be set and retrieved by
137 The current position pointer should only be set to a value returned by
139 a value returned in the location pointed to by
141 .Pf ( Fn getdirentries
145 If successful, the number of bytes actually transferred is returned.
146 Otherwise, -1 is returned and the global variable
148 is set to indicate the error.
155 is not a valid file descriptor open for reading.
161 point outside the allocated address space.
163 The file referenced by
165 is not a directory, or
167 is too small for returning a directory entry or block of entries,
168 or the current position pointer is invalid.
172 error occurred while reading from or writing to the file system.
180 function first appeared in
184 function first appeared in