source: trunk/kernel/syscalls/sys_chdir.c @ 1

Last change on this file since 1 was 1, checked in by alain, 5 years ago

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File size: 1.6 KB
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1/*
2 * sys_chdir: change process current work directory
3 *
4 * Copyright (c) 2008,2009,2010,2011,2012 Ghassan Almaless
5 * Copyright (c) 2011,2012 UPMC Sorbonne Universites
6 *
7 * This file is part of ALMOS-kernel.
8 *
9 * ALMOS-kernel is free software; you can redistribute it and/or modify it
10 * under the terms of the GNU General Public License as published by
11 * the Free Software Foundation; version 2.0 of the License.
12 *
13 * ALMOS-kernel is distributed in the hope that it will be useful, but
14 * WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
16 * General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with ALMOS-kernel; if not, write to the Free Software Foundation,
20 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
21 */
22
23#include <cpu.h>
24#include <device.h>
25#include <driver.h>
26#include <rwlock.h>
27#include <vfs.h>
28#include <sys-vfs.h>
29#include <thread.h>
30#include <ku_transfert.h>
31#include <task.h>
32
33int sys_chdir (char *pathname)
34{
35        register error_t err = 0;
36        register struct thread_s *this;
37        register struct task_s *task;
38        struct ku_obj ku_path;
39
40        this = current_thread;
41        task = current_task;
42
43        if(!pathname)
44        {
45                this->info.errno = EINVAL;
46                return -1;
47        }       
48     
49        KU_BUFF(ku_path, pathname);
50        rwlock_wrlock(&task->cwd_lock);
51       
52        if((err = vfs_chdir(&ku_path, &task->vfs_cwd)))
53        {
54                rwlock_unlock(&task->cwd_lock);
55                this->info.errno = (err < 0) ? -err : err;
56                return -1;
57        }
58   
59        rwlock_unlock(&task->cwd_lock);
60        return 0;
61}
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