source: trunk/kernel/syscalls/sys_rmdir.c @ 637

Last change on this file since 637 was 637, checked in by alain, 3 years ago

Introduce the non-standard pthread_parallel_create() system call
and re-write the <fft> and <sort> applications to improve the
intrinsic paralelism in applications.

File size: 2.5 KB
Line 
1/*
2 * sys_rmdir.c - Remove a directory from file system.
3 *
4 * Author    Alain Greiner (2016,2017,2018,2019)
5 *
6 * Copyright (c) 2015 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_kernel_types.h>
25#include <hal_uspace.h>
26#include <printk.h>
27#include <errno.h>
28#include <vfs.h>
29#include <vmm.h>
30#include <thread.h>
31#include <process.h>
32
33#include <syscalls.h>
34
35////////////////////////////////
36int sys_rmdir( char * pathname )
37{
38    // error_t     error;
39    char        kbuf[CONFIG_VFS_MAX_PATH_LENGTH];
40       
41        thread_t  * this    = CURRENT_THREAD;
42        process_t * process = this->process;
43
44#if (DEBUG_SYS_RMDIR || CONFIG_INSTRUMENTATION_SYSCALLS)
45uint64_t     tm_start = hal_get_cycles();
46#endif
47
48    // check pathname length
49    if( hal_strlen_from_uspace( pathname ) >= CONFIG_VFS_MAX_PATH_LENGTH )
50    {
51
52#if DEBUG_SYSCALLS_ERROR
53printk("\n[ERROR] in %s : pathname too long\n", __FUNCTION__ );
54#endif
55        this->errno = ENFILE;
56        return -1;
57    }
58
59    // copy pathname in kernel space
60    hal_strcpy_from_uspace( XPTR( local_cxy , kbuf ),
61                            pathname,
62                            CONFIG_VFS_MAX_PATH_LENGTH );
63
64    // get cluster and local pointer on reference process
65    xptr_t      ref_xp  = process->ref_xp;
66    process_t * ref_ptr = (process_t *)GET_PTR( ref_xp );
67    cxy_t       ref_cxy = GET_CXY( ref_xp );
68
69    // get extended pointer on cwd inode
70    // xptr_t cwd_xp = hal_remote_l64( XPTR( ref_cxy , &ref_ptr->vfs_cwd_xp ) );
71   
72    // get the cwd lock in write mode from reference process
73        remote_rwlock_wr_acquire( XPTR( ref_cxy , &ref_ptr->cwd_lock ) );
74
75    // call the relevant VFS function
76        printk("\n[ERROR] in %s : non implemented yet\n", __FUNCTION__ );
77
78    // release the cwd lock
79        remote_rwlock_wr_release( XPTR( ref_cxy , &ref_ptr->cwd_lock ) );
80
81        return 0;
82
83}  // end sys_rmdir()
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