299 lines
7.4 KiB
C++
299 lines
7.4 KiB
C++
/*
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* \brief Component starting noux in a sub-init to execute a specific command
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* \author Sid Hussmann
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* \author Norman Feske
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* \date 2019-05-11
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*/
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/*
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* Copyright (C) 2018 Genode Labs GmbH
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* Copyright (C) 2019 gapfruit AG
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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/log.h>
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#include <base/component.h>
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#include <base/attached_rom_dataspace.h>
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#include <os/reporter.h>
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namespace Exec_terminal {
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class Main;
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using namespace Genode;
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}
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class Exec_terminal::Main
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{
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private:
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Env& _env;
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Attached_rom_dataspace _config { _env, "exec_terminal.config" };
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Signal_handler<Main> _config_handler { _env.ep(), *this, &Main::_handle_config };
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Expanding_reporter _init_config_reporter { _env, "config", "config" };
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unsigned int _version { 0 };
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void _handle_config();
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void _gen_init_config(Xml_generator &, Xml_node const &config) const;
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void _gen_sub_init_config(Xml_generator &, Xml_node const &config) const;
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static void _gen_service_node(Xml_generator &xml, char const *name)
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{
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xml.node("service",[&] () { xml.attribute("name", name); });
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}
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static void _gen_parent_provides(Xml_generator &xml)
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{
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xml.node("parent-provides",[&] () {
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_gen_service_node(xml, "CPU");
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_gen_service_node(xml, "File_system");
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_gen_service_node(xml, "LOG");
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_gen_service_node(xml, "PD");
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_gen_service_node(xml, "RM");
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_gen_service_node(xml, "ROM");
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_gen_service_node(xml, "Report");
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_gen_service_node(xml, "Terminal");
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_gen_service_node(xml, "Timer");
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});
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}
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public:
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Main(Env& env) : _env(env)
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{
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_config.sigh(_config_handler);
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_handle_config();
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}
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};
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void Exec_terminal::Main::_handle_config()
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{
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_config.update();
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Xml_node const config = _config.xml();
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log(config);
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if (config.has_type("empty"))
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return;
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_version++;
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_init_config_reporter.generate([&] (Xml_generator &xml) {
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if (config.has_attribute("exit"))
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xml.node("empty");
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else
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_gen_init_config(xml, config);
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});
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}
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void Exec_terminal::Main::_gen_init_config(Xml_generator &xml, Xml_node const &config) const
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{
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_gen_parent_provides(xml);
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xml.node("start",[&] () {
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xml.attribute("name", "init");
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xml.attribute("caps", 900);
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xml.attribute("version", _version);
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xml.node("resource",[&] () {
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xml.attribute("name", "RAM");
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xml.attribute("quantum", "70M"); });
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xml.node("config", [&] () {
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_gen_sub_init_config(xml, config); });
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xml.node("route",[&] () {
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xml.node("any-service",[&] () {
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xml.node("parent",[&] () { }); }); });
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});
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}
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void Exec_terminal::Main::_gen_sub_init_config(Xml_generator &xml, Xml_node const &config) const
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{
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xml.attribute("verbose", "no");
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_gen_parent_provides(xml);
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auto gen_parent_route = [&] (auto name) {
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xml.node("service",[&] () {
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xml.attribute("name", name);
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xml.node("parent",[&] () {}); }); };
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auto gen_ram = [&] (auto ram) {
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xml.node("resource",[&] () {
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xml.attribute("name", "RAM");
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xml.attribute("quantum", ram); }); };
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auto gen_provides_service = [&] (auto name) {
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xml.node("provides", [&] () {
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xml.node("service", [&] () {
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xml.attribute("name", name); }); }); };
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xml.node("start",[&] () {
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xml.attribute("name", "vfs");
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xml.attribute("caps", 120);
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gen_ram("32M");
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gen_provides_service("File_system");
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xml.node("config",[&] () {
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xml.node("vfs",[&] () {
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xml.node("tar",[&] () { xml.attribute("name", "bash.tar"); });
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xml.node("tar",[&] () { xml.attribute("name", "coreutils-minimal.tar"); });
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xml.node("tar",[&] () { xml.attribute("name", "vim-minimal.tar"); });
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xml.node("dir",[&] () {
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xml.attribute("name", "rw");
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xml.node("fs",[&] () { xml.attribute("label", "rw"); });
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});
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xml.node("dir", [&] () {
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xml.attribute("name", "dev");
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xml.node("terminal", [&] () { });
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xml.node("inline", [&] () {
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xml.attribute("name", "rtc");
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xml.append("2018-01-01 00:01");
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});
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});
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xml.node("dir",[&] () {
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xml.attribute("name", "tmp");
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xml.node("ram",[&] () { });
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});
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xml.node("inline", [&] () {
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xml.attribute("name", ".bash_profile");
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xml.append("echo Hello from Genode! > /dev/log");
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});
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});
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xml.node("default-policy", [&] () {
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xml.attribute("root", "/");
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xml.attribute("writeable", "yes");
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});
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});
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xml.node("route",[&] () {
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gen_parent_route("CPU");
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gen_parent_route("LOG");
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gen_parent_route("PD");
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gen_parent_route("ROM");
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gen_parent_route("File_system");
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gen_parent_route("Terminal");
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});
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});
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auto gen_vfs_route = [&] () {
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xml.node("service",[&] () {
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xml.attribute("name", "File_system");
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xml.node("child",[&] () { xml.attribute("name", "vfs"); }); }); };
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xml.node("start",[&] () {
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xml.attribute("name", "vfs_rom");
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xml.attribute("caps", 100);
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gen_ram("16M");
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gen_provides_service("ROM");
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xml.node("binary", [&] () { xml.attribute("name", "fs_rom"); });
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xml.node("config", [&] () { });
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xml.node("route", [&] () {
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gen_parent_route("CPU");
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gen_parent_route("LOG");
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gen_parent_route("PD");
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gen_parent_route("ROM");
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gen_vfs_route();
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});
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});
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xml.node("start",[&] () {
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xml.attribute("name", "/bin/bash");
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xml.attribute("caps", 500);
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gen_ram("16M");
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/* exit sub init when leaving bash */
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xml.node("exit",[&] () {
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xml.attribute("propagate", "yes"); });
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xml.node("config",[&] () {
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xml.node("libc",[&] () {
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xml.attribute("stdin", "/dev/terminal");
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xml.attribute("stdout", "/dev/terminal");
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xml.attribute("stderr", "/dev/terminal");
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xml.attribute("rtc", "/dev/rtc");
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});
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xml.node("vfs",[&] () {
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xml.node("fs",[&] () { xml.attribute("label", "rw"); });
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xml.node("dir", [&] () {
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xml.attribute("name", "dev");
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xml.node("null", [&] () { });
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xml.node("log", [&] () { });
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});
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});
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auto gen_env = [&] (auto key, auto value) {
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xml.node("env",[&] () {
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xml.attribute("key", key);
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xml.attribute("value", value); }); };
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auto gen_arg = [&] (auto value) {
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xml.node("arg",[&] () {
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xml.attribute("value", value); }); };
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gen_env("TERM", "screen");
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gen_env("HOME", "/");
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gen_env("PATH", "/bin");
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gen_env("HISTFILE", "");
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gen_env("IGNOREOF", "3");
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gen_arg("/bin/bash");
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if (config.has_attribute("command")) {
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typedef String<128> Command;
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Command const command = config.attribute_value("command", Command());
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if (command.valid()) {
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gen_arg("-c");
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/*
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* XXX appending " ; true" is done to force bash to fork.
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* Bash fails to return the proper exit code otherwise.
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*/
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gen_arg(String<200>(command, " ; true"));
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}
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} else {
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gen_env("PS1", "noux@$PWD> ");
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gen_arg("--login");
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}
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});
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xml.node("route",[&] () {
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xml.node("service",[&] () {
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xml.attribute("name", "ROM");
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xml.attribute("label_last", "/bin/bash");
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xml.node("child",[&] () { xml.attribute("name", "vfs_rom"); });
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});
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xml.node("service",[&] () {
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xml.attribute("name", "ROM");
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xml.attribute("label_prefix", "/bin");
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xml.node("child",[&] () { xml.attribute("name", "vfs_rom"); });
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});
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gen_parent_route("CPU");
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gen_parent_route("LOG");
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gen_parent_route("PD");
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gen_parent_route("RM");
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gen_parent_route("ROM");
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gen_parent_route("Timer");
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gen_vfs_route();
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});
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});
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}
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void Component::construct(Genode::Env &env)
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{
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static Exec_terminal::Main main(env);
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}
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