2bf67136c6
These file systems are provided on-demand by loading a shared library when the fstab node is traversed. By convention this library is named after the file system it provides. For example a file system that provides a 'random' file system node is called 'vfs_random.lib.so'. It is still possible to give the the node another name in the vfs. The following code snippts illustrates this matter: ! [...] ! <config> ! <libc> ! <vfs> ! <dir name="dev"> <jitterentropy name="random"/> </dir> ! </vfs> ! </libc> ! </config> ! [...] Here the jitterentropy file system, implemented in 'vfs_jitterentropy.lib.so' provides a file system node named 'random' in the 'dev' directory. When traversing the vfs section the libc will try to load 'vfs_jitterentropy.lib.so' but programs may access the file system only via '/dev/random'. Fixes #1240.
40 lines
835 B
C++
40 lines
835 B
C++
/*
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* \brief vfs plugin interface
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* \author Josef Soentgen
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* \date 2014-08-19
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*/
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/*
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* Copyright (C) 2014 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU General Public License version 2.
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*/
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#ifndef _LIBC_PLUGIN__VFS_H_
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#define _LIBC_PLUGIN__VFS_H_
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/* Genode includes */
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#include <vfs/file_system.h>
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#include <util/xml_node.h>
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namespace Libc {
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struct File_system_factory;
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typedef Libc::File_system_factory*(*File_system_factory_func)(void);
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}
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struct Libc::File_system_factory
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{
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char const * const name;
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File_system_factory(char const *name) : name(name) { }
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virtual Vfs::File_system *create(Genode::Xml_node node) = 0;
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virtual bool matches(Genode::Xml_node node) const {
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return node.has_type(name); }
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};
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#endif /* _LIBC_PLUGIN__VFS_H_ */
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