source: trunk/libs/mini-libc/dirent.h @ 611

Last change on this file since 611 was 611, checked in by alain, 3 years ago

Introduce sigificant modifs in VFS to support the <ls> command,
and the . and .. directories entries.

File size: 3.0 KB
Line 
1/*
2 * dirent.h - User level <dirent> library definition.
3 *
4 * Author     Alain Greiner (2016,2017,2018)
5 *
6 * Copyright (c) UPMC Sorbonne Universites
7 *
8 * This file is part of ALMOS-MKH.
9 *
10 * ALMOS-MKH is free software; you can redistribute it and/or modify it
11 * under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; version 2.0 of the License.
13 *
14 * ALMOS-MKH is distributed in the hope that it will be useful, but
15 * WITHOUT ANY WARRANTY; without even the implied warranty of
16 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
17 * General Public License for more details.
18 *
19 * You should have received a copy of the GNU General Public License
20 * along with ALMOS-MKH; if not, write to the Free Software Foundation,
21 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 */
23
24#ifndef _DIRENT_H_
25#define _DIRENT_H_
26
27#include <shared_dirent.h>
28
29/*****************************************************************************************
30 * This file defines the user level, directory entries related library.
31 * All these functions make a system call to access the kernel VFS.
32 ****************************************************************************************/
33
34/*****************************************************************************************
35 * This function opens the directory identified by the <pathname> argument,
36 * associates a directory stream with it and returns an user space pointer to identify
37 * this directory stream in subsequent readdir() or closedir() operations. 
38 *****************************************************************************************
39 * @ pathname   : pathname (can be relative or absolute).
40 * @ returns DIR* pointer if success / returns NULL if pathname cannot be accessed.
41 ****************************************************************************************/
42DIR * opendir( const char * pathname );
43
44/*****************************************************************************************
45 * This function returns a pointer to the next directory entry.
46 *****************************************************************************************
47 * @ dirp     : DIR pointer identifying the directory.
48 * @ returns dirent* pointer / returns NULL upon reaching end of directory or on error.
49 ****************************************************************************************/
50struct dirent * readdir( DIR * dirp );
51
52/*****************************************************************************************
53 * This function closes the directory identified by the <dirp> argument, and releases
54 * all structures associated with the <dirp> pointer.
55 *****************************************************************************************
56 * @ dirp     : DIR pointer identifying the directory.
57 * @ returns 0 if success / returns -1 if failure.
58 ****************************************************************************************/
59int closedir( DIR * dirp );
60
61#endif
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