source: trunk/kernel/syscalls/sys_mkdir.c @ 382

Last change on this file since 382 was 303, checked in by max@…, 7 years ago

Style, and use hal_strcpy_from_uspace.

File size: 2.6 KB
Line 
1/*
2 * sys_mkdir.c - Create a new 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 <hal_uspace.h>
26#include <vfs.h>
27#include <vmm.h>
28#include <errno.h>
29#include <process.h>
30#include <thread.h>
31#include <printk.h>
32
33///////////////////////////////////
34int sys_mkdir( char     * pathname,
35               uint32_t   mode )
36{
37    error_t        error;
38    char           kbuf[CONFIG_VFS_MAX_PATH_LENGTH];
39
40    thread_t     * this     = CURRENT_THREAD;
41    process_t    * process  = this->process;
42
43    // check fd_array not full
44    if( process_fd_array_full() )
45    {
46        printk("\n[ERROR] in %s : file descriptor array full for process %x\n",
47               __FUNCTION__ , process->pid );
48        this->errno = ENFILE;
49        return -1;
50    }
51
52    // get pathname copy in kernel space
53    error = hal_strcpy_from_uspace( kbuf , pathname , CONFIG_VFS_MAX_PATH_LENGTH );
54
55    if( error )
56    {
57        printk("\n[ERROR] in %s : pathname too long\n", __FUNCTION__ );
58        this->errno = ENFILE;
59        return -1;
60    }
61
62    // get cluster and local pointer on reference process
63    xptr_t      ref_xp  = process->ref_xp;
64    process_t * ref_ptr = (process_t *)GET_PTR( ref_xp );
65    cxy_t       ref_cxy = GET_CXY( ref_xp );
66
67    // get extended pointer on cwd inode
68    xptr_t cwd_xp = hal_remote_lwd( XPTR( ref_cxy , &ref_ptr->vfs_cwd_xp ) );
69
70    // get the cwd lock in read mode from reference process
71    remote_rwlock_rd_lock( XPTR( ref_cxy , &ref_ptr->cwd_lock ) );
72
73    // call the relevant VFS function
74    error = vfs_mkdir( cwd_xp,
75                       kbuf,
76                       mode );
77
78    // release the cwd lock
79    remote_rwlock_rd_unlock( XPTR( ref_cxy , &ref_ptr->cwd_lock ) );
80
81    if( error )
82    {
83        printk("\n[ERROR] in %s : cannot create directory %s\n",
84               __FUNCTION__ , kbuf );
85        this->errno = error;
86        return -1;
87    }
88
89    return 0;
90}
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