source: trunk/kernel/syscalls/sys_close.c @ 244

Last change on this file since 244 was 124, checked in by max@…, 7 years ago

rename hal_wbflush->hal_fence

File size: 1.9 KB
RevLine 
[1]1/*
[23]2 * sys_close.c  close an open file
[1]3 *
[23]4 * Author    Alain Greiner (2016,2017)
[1]5 *
[23]6 * Copyright (c) UPMC Sorbonne Universites
[1]7 *
[23]8 * This file is part of ALMOS-MKH.
9 *
10 * ALMOS-MKH is free software; you can redistribute it and/or modify it
[1]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 *
[23]14 * ALMOS-MKH is distributed in the hope that it will be useful, but
[1]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
[23]20 * along with ALMOS-MKH; if not, write to the Free Software Foundation,
[1]21 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
22 */
23
[23]24#include <kernel_config.h>
25#include <hal_types.h>
26#include <hal_special.h>
[1]27#include <vfs.h>
28#include <process.h>
29#include <thread.h>
[23]30#include <printk.h>
[1]31
[23]32//////////////////////////////////
33int sys_close ( uint32_t file_id )
[1]34{
[23]35    error_t     error;
36    xptr_t      file_xp;
37
38        thread_t  * this    = CURRENT_THREAD;
39        process_t * process = this->process;
40
41    // check file_id argument
42        if( file_id >= CONFIG_PROCESS_FILE_MAX_NR )
[1]43        {
[23]44        printk("\n[ERROR] in %s : illegal file descriptor index = %d\n",
45               __FUNCTION__ , file_id );
46                this->errno = EBADFD;
[1]47                return -1;
48        }
49
[23]50    // get extended pointer on remote file descriptor
51    file_xp = process_fd_get_xptr( process , file_id );
52
53    if( file_xp == XPTR_NULL )
54    {
55        printk("\n[ERROR] in %s : undefined file descriptor = %d\n",
56               __FUNCTION__ , file_id );
57                this->errno = EBADFD;
58                return -1;
59    }
60
61    // call the relevant VFS function
62        error = vfs_close( file_xp , file_id );
63
64        if( error )
[1]65        {
[23]66        printk("\n[ERROR] in %s : cannot close file descriptor = %d\n",
67               __FUNCTION__ , file_id );
68                this->errno = error;
[1]69                return -1;
70        }
71
[124]72        hal_fence();
[23]73
[1]74        return 0;
75}
Note: See TracBrowser for help on using the repository browser.