73 lines
1.3 KiB
C++
73 lines
1.3 KiB
C++
/**
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* \brief Rump symlink node
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* \author Sebastian Sumpf
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* \date 2014-01-20
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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 _SYMLINK_H_
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#define _SYMLINK_H_
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/* Genode includes */
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#include <file_system/util.h>
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#include <os/path.h>
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#include "node.h"
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namespace File_system {
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class Symlink;
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}
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class File_system::Symlink : public Node
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{
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private:
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typedef Genode::Path<MAX_PATH_LEN> Path;
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Path _path;
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bool _create;
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public:
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Symlink(char const *dir, char const *name, bool create)
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: Node(0), _path(name, dir), _create(create)
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{
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Node::name(name);
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}
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Symlink(char const *path)
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: Node(0), _path(path), _create(false)
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{
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Node::name(basename(path));
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}
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size_t write(char const *src, size_t len, seek_off_t seek_offset)
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{
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if (!_create)
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return 0;
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int ret = rump_sys_symlink(src, _path.base());
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return ret == -1 ? 0 : ret;
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}
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size_t read(char *dst, size_t len, seek_off_t seek_offset)
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{
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int ret = rump_sys_readlink(_path.base(), dst, len);
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return ret == -1 ? 0 : ret;
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}
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file_size_t length()
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{
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char link_to[MAX_PATH_LEN];
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return read(link_to, MAX_PATH_LEN, 0);
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}
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};
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#endif /* _SYMLINK_H_ */
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