70 lines
1.3 KiB
C++
70 lines
1.3 KiB
C++
/*
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* \brief Symlink file-system node
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* \author Norman Feske
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* \author Christian Helmuth
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* \date 2013-11-11
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*
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* FIXME unfinished
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*/
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/*
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* Copyright (C) 2013-2017 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 Affero General Public License version 3.
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*/
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#ifndef _SYMLINK_H_
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#define _SYMLINK_H_
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/* local includes */
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#include <node.h>
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#include <lx_util.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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char _link_to[MAX_PATH_LEN];
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file_size_t _length() const { return strlen(_link_to) + 1; }
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public:
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Symlink(char const *name) { Node::name(name); }
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size_t read(char *dst, size_t len, seek_off_t seek_offset) override
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{
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size_t count = min(len, sizeof(_link_to) + 1);
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Genode::copy_cstring(dst, _link_to, count);
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return count;
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}
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size_t write(char const *src, size_t len, seek_off_t seek_offset) override
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{
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/* Ideal symlink operations are atomic. */
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if (seek_offset) return 0;
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size_t count = min(len, sizeof(_link_to) + 1);
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Genode::copy_cstring(_link_to, src, count);
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return count;
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}
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Status status() override
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{
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Status s;
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s.inode = inode();
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s.size = _length();
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s.mode = File_system::Status::MODE_SYMLINK;
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return s;
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}
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};
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#endif /* _SYMLINK_H_ */
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