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rootfs: directories must not be opened writable. 

* Also added support for O_DIRECTORY while at it.
* This fixes bug #13573.
This commit is contained in:
Axel Dörfler 2017-07-20 10:10:20 +02:00
parent 84edb1a177
commit a1eceb4610
1 changed files with 9 additions and 2 deletions
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11
src/system/kernel/fs/rootfs.cpp
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@ -1,5 +1,5 @@
/*
* Copyright 2002-2016, Axel Dörfler, axeld@pinc-software.de.
* Copyright 2002-2017, Axel Dörfler, axeld@pinc-software.de.
* Distributed under the terms of the MIT License.
*
* Copyright 2001-2002, Travis Geiselbrecht. All rights reserved.
@ -583,8 +583,15 @@ rootfs_create(fs_volume* _volume, fs_vnode* _dir, const char* name, int omode,
static status_t
rootfs_open(fs_volume* _volume, fs_vnode* _v, int oflags, void** _cookie)
rootfs_open(fs_volume* _volume, fs_vnode* _v, int openMode, void** _cookie)
{
struct rootfs_vnode* vnode = (rootfs_vnode*)_v->private_node;
if (S_ISDIR(vnode->stream.type) && (openMode & O_RWMASK) != O_RDONLY)
return B_IS_A_DIRECTORY;
if ((openMode & O_DIRECTORY) != 0 && !S_ISDIR(vnode->stream.type))
return B_NOT_A_DIRECTORY;
// allow to open the file, but it can't be done anything with it
*_cookie = NULL;