source: trunk/kernel/syscalls/sys_closedir.c @ 23

Last change on this file since 23 was 23, checked in by alain, 5 years ago

Introduce syscalls.

File size: 2.0 KB
Line 
1/*
2 * sys_closedir.c - Close an open directory.
3 *
4 * Author    Alain Greiner  (2016, 2017)
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#include <hal_types.h>
25#include <vfs.h>
26#include <thread.h>
27#include <printk.h>
28#include <process.h>
29
30/////////////////////////////////////
31int sys_closedir ( uint32_t file_id )
32{
33        error_t        error;
34        xptr_t         file_xp;   // extended pointer on searched directory file descriptor
35
36        thread_t     * this     = CURRENT_THREAD;
37        process_t    * process  = this->process;
38
39    // check file_id argument
40        if( file_id >= CONFIG_PROCESS_FILE_MAX_NR )
41        {
42        printk("\n[ERROR] in %s : illegal file descriptor index %d\n",
43               __FUNCTION__ , file_id );
44        this->errno = EBADFD;
45                return -1;
46        }
47
48    // get extended pointer on remote file descriptor
49    file_xp = process_fd_get_xptr( process , file_id );
50
51    if( file_xp == XPTR_NULL )
52    {
53        printk("\n[ERROR] in %s : undefined file descriptor index = %d\n",
54               __FUNCTION__ , file_id );
55                this->errno = EBADFD;
56                return -1;
57    }
58
59    // call relevant VFS function
60        error  = vfs_close( file_xp , file_id );
61
62        if( error )
63        {
64        printk("\n[ERROR] in %s : cannot close the directory = %d\n",
65               __FUNCTION__ , file_id );
66                this->errno = error;
67                return -1;
68        }
69
70        return 0;
71
72}  // end sys_closedir()
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