78 lines
2.0 KiB
C++
78 lines
2.0 KiB
C++
/*
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* \brief Send terminal output on specified input (like expect)
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* \author Stefan Kalkowski
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* \date 2019-04-03
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*/
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/*
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* Copyright (C) 2019 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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/* Genode includes */
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#include <base/attached_rom_dataspace.h>
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#include <base/component.h>
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#include <terminal_session/connection.h>
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using namespace Genode;
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struct Main
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{
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enum { MAX_LINE_LENGTH = 512 };
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using Line = String<MAX_LINE_LENGTH>;
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Terminal::Connection terminal;
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Signal_handler<Main> read_avail;
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unsigned line_idx = 0;
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char line[MAX_LINE_LENGTH];
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char read_buffer[MAX_LINE_LENGTH];
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Line expect {};
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Line send {};
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bool verbose { false };
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void handle_read_avail()
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{
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unsigned num_bytes = terminal.read(read_buffer, sizeof(read_buffer));
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for (unsigned i = 0; i < num_bytes; i++) {
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/* copy over all characters other than line-end */
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if (read_buffer[i] != '\n' &&
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read_buffer[i] != '\r') {
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line[line_idx++] = read_buffer[i];
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line[line_idx] = 0;
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}
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/* check for expected line-start string, if found send line */
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if (expect.valid() && expect == line) {
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terminal.write(send.string(), send.length()-1);
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terminal.write("\r\n", 2);
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}
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/* check for line end */
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if (read_buffer[i] == '\n') {
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if (verbose) log(Cstring(line));
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line_idx = 0;
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}
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}
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}
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Main(Env &env) : terminal(env),
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read_avail(env.ep(), *this, &Main::handle_read_avail)
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{
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terminal.read_avail_sigh(read_avail);
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try {
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Genode::Attached_rom_dataspace config { env, "config" };
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verbose = config.xml().attribute_value("verbose", false);
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expect = config.xml().attribute_value("expect", Line());
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send = config.xml().attribute_value("send", Line());
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} catch (...) { warning("No config data available"); }
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}
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};
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void Component::construct(Env &env) { static Main main(env); }
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