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

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

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File size: 1.5 KB
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1/*
2 * sys_chmod: change file mode
3 *
4 * Copyright (c) 2015 UPMC Sorbonne Universites
5 *
6 * This file is part of ALMOS-kernel.
7 *
8 * ALMOS-kernel is free software; you can redistribute it and/or modify it
9 * under the terms of the GNU General Public License as published by
10 * the Free Software Foundation; version 2.0 of the License.
11 *
12 * ALMOS-kernel is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
15 * General Public License for more details.
16 *
17 * You should have received a copy of the GNU General Public License
18 * along with ALMOS-kernel; if not, write to the Free Software Foundation,
19 * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
20 */
21
22#include <cpu.h>
23#include <device.h>
24#include <driver.h>
25#include <rwlock.h>
26#include <vfs.h>
27#include <sys-vfs.h>
28#include <thread.h>
29#include <ku_transfert.h>
30#include <task.h>
31
32int sys_chmod (char *pathname, uint_t mode)
33{
34        register error_t err = 0;
35        register struct thread_s *this;
36        register struct task_s *task;
37        struct ku_obj ku_path;
38
39        this = current_thread;
40        task = current_task;
41
42        if(!pathname || NOT_IN_USPACE(pathname))
43        {
44                this->info.errno = EINVAL;
45                return -1;
46        }       
47       
48     
49        KU_BUFF(ku_path, pathname);
50        rwlock_wrlock(&task->cwd_lock);
51       
52        if((err = vfs_chmod(&ku_path, &task->vfs_cwd, mode)))
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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