71 lines
1.5 KiB
C++
71 lines
1.5 KiB
C++
/*
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* \brief LOG file system
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* \author Norman Feske
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* \date 2014-04-11
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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 _INCLUDE__VFS__LOG_FILE_SYSTEM_H_
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#define _INCLUDE__VFS__LOG_FILE_SYSTEM_H_
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#include <log_session/connection.h>
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#include <vfs/single_file_system.h>
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namespace Vfs { class Log_file_system; }
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class Vfs::Log_file_system : public Single_file_system
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{
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private:
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Genode::Log_connection _log;
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public:
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Log_file_system(Xml_node config)
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:
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Single_file_system(NODE_TYPE_CHAR_DEVICE, name(), config)
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{ }
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static const char *name() { return "log"; }
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/********************************
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** File I/O service interface **
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********************************/
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Write_result write(Vfs_handle *, char const *src, file_size count,
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file_size &out_count) override
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{
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out_count = count;
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/* count does not include the trailing '\0' */
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while (count > 0) {
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char tmp[128];
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int const curr_count = min(count, sizeof(tmp) - 1);
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memcpy(tmp, src, curr_count);
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tmp[curr_count > 0 ? curr_count : 0] = 0;
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_log.write(tmp);
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count -= curr_count;
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src += curr_count;
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}
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return WRITE_OK;
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}
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Read_result read(Vfs_handle *, char *, file_size,
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file_size &out_count) override
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{
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out_count = 0;
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return READ_OK;
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}
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};
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#endif /* _INCLUDE__VFS__LOG_FILE_SYSTEM_H_ */
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