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113 lines
2.5 KiB
C++
113 lines
2.5 KiB
C++
/*
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* \brief Terminal file system
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* \author Christian Prochaska
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* \author Norman Feske
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* \date 2012-05-23
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*/
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/*
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* Copyright (C) 2012-2014 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__TERMINAL_FILE_SYSTEM_H_
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#define _INCLUDE__VFS__TERMINAL_FILE_SYSTEM_H_
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#include <terminal_session/connection.h>
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#include <vfs/single_file_system.h>
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namespace Vfs { class Terminal_file_system; }
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class Vfs::Terminal_file_system : public Single_file_system
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{
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private:
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struct Label
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{
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enum { LABEL_MAX_LEN = 64 };
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char string[LABEL_MAX_LEN];
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Label(Xml_node config)
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{
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string[0] = 0;
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try { config.attribute("label").value(string, sizeof(string)); }
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catch (...) { }
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}
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} _label;
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Terminal::Connection _terminal;
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public:
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Terminal_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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_label(config),
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_terminal(_label.string)
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{
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/*
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* Wait for connection-established signal
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*/
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/* create signal receiver, just for the single signal */
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Genode::Signal_context sig_ctx;
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Genode::Signal_receiver sig_rec;
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Signal_context_capability sig_cap = sig_rec.manage(&sig_ctx);
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/* register signal handler */
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_terminal.connected_sigh(sig_cap);
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/* wati for signal */
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sig_rec.wait_for_signal();
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sig_rec.dissolve(&sig_ctx);
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}
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static const char *name() { return "terminal"; }
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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 *buf, file_size buf_size,
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file_size &out_count) override
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{
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out_count = _terminal.write(buf, buf_size);
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return WRITE_OK;
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}
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Read_result read(Vfs_handle *, char *dst, file_size count,
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file_size &out_count) override
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{
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out_count = _terminal.read(dst, count);
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return READ_OK;
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}
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Ftruncate_result ftruncate(Vfs_handle *vfs_handle, file_size) override
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{
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return FTRUNCATE_OK;
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}
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bool check_unblock(Vfs_handle *vfs_handle, bool rd, bool wr, bool ex) override
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{
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if (rd && (_terminal.avail() > 0))
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return true;
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if (wr)
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return true;
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return false;
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}
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void register_read_ready_sigh(Vfs_handle *vfs_handle,
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Signal_context_capability sigh) override
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{
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_terminal.read_avail_sigh(sigh);
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}
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};
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#endif /* _INCLUDE__VFS__TERMINAL_FILE_SYSTEM_H_ */
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