recycled-ni-neutrino/src/gui/plugins.cpp

/*
	Neutrino-GUI  -   DBoxII-Project

	Copyright (C) 2001 Steffen Hehn 'McClean'
	Homepage: http://dbox.cyberphoria.org/

	Kommentar:

	Diese GUI wurde von Grund auf neu programmiert und sollte nun vom
	Aufbau und auch den Ausbaumoeglichkeiten gut aussehen. Neutrino basiert
	auf der Client-Server Idee, diese GUI ist also von der direkten DBox-
	Steuerung getrennt. Diese wird dann von Daemons uebernommen.


	License: GPL

	This program is free software; you can redistribute it and/or modify
	it under the terms of the GNU General Public License as published by
	the Free Software Foundation; either version 2 of the License, or
	(at your option) any later version.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with this program; if not, write to the Free Software
	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/

#ifdef HAVE_CONFIG_H
#include <config.h>
#endif

#include <sstream>
#include <fstream>
#include <iostream>
#include <algorithm>

#include <dirent.h>
#include <dlfcn.h>
#include <sys/types.h>
#include <sys/stat.h>

#include <unistd.h>
#include <stdio.h>
#include <fcntl.h>
#include <sys/ioctl.h>
#include <signal.h>
#include <errno.h>
#include <sys/wait.h>

#include <global.h>
#include <neutrino.h>

#include <system/helpers.h>

#include <zapit/client/zapittools.h>

#include "plugins.h"

#include <daemonc/remotecontrol.h>
#if ENABLE_LUA
#include <gui/luainstance.h>
#endif

extern CPlugins       * g_PluginList;    /* neutrino.cpp */
extern CRemoteControl * g_RemoteControl; /* neutrino.cpp */

#define PLUGINDIR_VAR "/var/tuxbox/plugins"

CPlugins::CPlugins()
{
	frameBuffer = NULL;
	number_of_plugins = 0;
}

CPlugins::~CPlugins()
{
	plugin_list.clear();
}

bool CPlugins::plugin_exists(const std::string & filename)
{
	return (find_plugin(filename) >= 0);
}

int CPlugins::find_plugin(const std::string & filename)
{
	for (int i = 0; i <  (int) plugin_list.size(); i++)
	{
		if ( (filename.compare(plugin_list[i].filename) == 0) || (filename.compare(plugin_list[i].filename + ".cfg") == 0) )
			return i;
	}
	return -1;
}

void CPlugins::scanDir(const char *dir)
{
	struct dirent **namelist;
	std::string fname;

	int number_of_files = scandir(dir, &namelist, 0, alphasort);

	if(number_of_files < 0)
		return;

	for (int i = 0; i < number_of_files; i++)
	{
		std::string filename;

		filename = namelist[i]->d_name;
		int pos = filename.find(".cfg");
		if (pos > -1)
		{
			plugin new_plugin;
			new_plugin.filename = filename.substr(0, pos);
			fname = dir;
			fname += '/';
			new_plugin.cfgfile = fname.append(new_plugin.filename);
			new_plugin.cfgfile.append(".cfg");
			parseCfg(&new_plugin);
			bool plugin_ok = parseCfg(&new_plugin);
			if (plugin_ok) {
				new_plugin.pluginfile = fname;
				if (new_plugin.type == CPlugins::P_TYPE_SCRIPT)
					new_plugin.pluginfile.append(".sh");
#if ENABLE_LUA
				else if (new_plugin.type == CPlugins::P_TYPE_LUA)
					new_plugin.pluginfile.append(".lua");
#endif
				else // CPlugins::P_TYPE_GAME or CPlugins::P_TYPE_TOOL
					new_plugin.pluginfile.append(".so");
				// We do not check if new_plugin.pluginfile exists since .cfg in
				// PLUGINDIR_VAR can overwrite settings in read only dir
				// PLUGINDIR. This needs PLUGINDIR_VAR to be scanned at
				// first -> .cfg in PLUGINDIR will be skipped since plugin
				// already exists in the list.
				// This behavior is used to make sure plugins can be disabled
				// by creating a .cfg in PLUGINDIR_VAR (PLUGINDIR often is read only).

				if (!plugin_exists(new_plugin.filename))
				{
					plugin_list.push_back(new_plugin);
					number_of_plugins++;
				}
			}
		}
		free(namelist[i]);
	}
	free(namelist);
}

void CPlugins::loadPlugins()
{
	frameBuffer = CFrameBuffer::getInstance();
	number_of_plugins = 0;
	plugin_list.clear();
	sindex = 100;
	scanDir(g_settings.plugin_hdd_dir.c_str());
	scanDir(PLUGINDIR_VAR);
	scanDir(PLUGINDIR);

	sort (plugin_list.begin(), plugin_list.end());
}

bool CPlugins::parseCfg(plugin *plugin_data)
{
	std::ifstream inFile;
	std::string line[20];
	int linecount = 0;
	bool reject = false;

	inFile.open(plugin_data->cfgfile.c_str());

	while (linecount < 20 && getline(inFile, line[linecount++]))
	{};

	plugin_data->index = sindex++;
	plugin_data->key = 0; //CRCInput::RC_nokey
	plugin_data->fb = false;
	plugin_data->rc = false;
	plugin_data->lcd = false;
	plugin_data->vtxtpid = false;
	plugin_data->showpig = false;
	plugin_data->needoffset = false;
	plugin_data->hide = false;
	plugin_data->type = CPlugins::P_TYPE_DISABLED;

	for (int i = 0; i < linecount; i++)
	{
		std::istringstream iss(line[i]);
		std::string cmd;
		std::string parm;

		getline(iss, cmd, '=');
		getline(iss, parm, '=');

		if (cmd == "index")
		{
			plugin_data->index = atoi(parm.c_str());
		}
		else if (cmd == "pluginversion")
		{
			plugin_data->key = atoi(parm.c_str());
		}
		else if (cmd == "name")
		{
			plugin_data->name = parm;
		}
		else if (cmd == "desc")
		{
			plugin_data->description = parm;
		}
		else if (cmd == "depend")
		{
			plugin_data->depend = parm;
		}
		else if (cmd == "type")
		{
			plugin_data->type = getPluginType(atoi(parm.c_str()));
		}
		else if (cmd == "needfb")
		{
			plugin_data->fb = ((parm == "1")?true:false);
		}
		else if (cmd == "needrc")
		{
			plugin_data->rc = ((parm == "1")?true:false);
		}
		else if (cmd == "needlcd")
		{
			plugin_data->lcd = ((parm == "1")?true:false);
		}
		else if (cmd == "needvtxtpid")
		{
			plugin_data->vtxtpid = ((parm == "1")?true:false);
		}
		else if (cmd == "pigon")
		{
			plugin_data->showpig = ((parm == "1")?true:false);
		}
		else if (cmd == "needoffsets")
		{
			plugin_data->needoffset = ((parm == "1")?true:false);
		}
		else if (cmd == "hide")
		{
			plugin_data->hide = ((parm == "1")?true:false);
		}
		else if (cmd == "needenigma")
		{
			reject = ((parm == "1")?true:false);
		}

	}

	inFile.close();
	return !reject;
}

PluginParam * CPlugins::makeParam(const char * const id, const char * const value, PluginParam * const next)
{
	PluginParam * startparam = new PluginParam;

	startparam->next = next;
	startparam->id   = id;
	startparam->val  = strdup(value);

	return startparam;
}

PluginParam * CPlugins::makeParam(const char * const id, const int value, PluginParam * const next)
{
	char aval[10];

	sprintf(aval, "%d", value);

	return makeParam(id, aval, next);
}

void CPlugins::startPlugin_by_name(const std::string & name)
{
	for (int i = 0; i <  (int) plugin_list.size(); i++)
	{
		if (name.compare(g_PluginList->getName(i))==0)
		{
			startPlugin(i);
			return;
		}
	}
}

void CPlugins::startPlugin(const char * const name)
{
	int pluginnr = find_plugin(name);
	if (pluginnr > -1)
		startPlugin(pluginnr);
	else
		printf("[CPlugins] could not find %s\n", name);

}

void CPlugins::startScriptPlugin(int number)
{
	const char *script = plugin_list[number].pluginfile.c_str();
	printf("[CPlugins] executing script %s\n",script);
	if (!file_exists(script))
	{
		printf("[CPlugins] could not find %s,\nperhaps wrong plugin type in %s\n",
		       script, plugin_list[number].cfgfile.c_str());
		return;
	}
	pid_t pid = 0;
	FILE *f = my_popen(pid,script,"r");
	if (f != NULL)
	{
		char *output=NULL;
		size_t len = 0;
		while (( getline(&output, &len, f)) != -1)

		{
			scriptOutput += output;
		}
		pclose(f);
		int s;
		while (waitpid(pid,&s,WNOHANG)>0);
		kill(pid,SIGTERM);
		if(output)
			free(output);
	}
	else
	{
		printf("[CPlugins] can't execute %s\n",script);
	}
}

#if ENABLE_LUA
void CPlugins::startLuaPlugin(int number)
{
	const char *script = plugin_list[number].pluginfile.c_str();
	printf("[CPlugins] executing lua script %s\n",script);
	if (!file_exists(script))
	{
		printf("[CPlugins] could not find %s,\nperhaps wrong plugin type in %s\n",
		       script, plugin_list[number].cfgfile.c_str());
		return;
	}
	CLuaInstance *lua = new CLuaInstance();
	lua->runScript(script);
	delete lua;
}
#endif

void CPlugins::startPlugin(int number)
{
	// always delete old output
	delScriptOutput();
	/* export neutrino settings to the environment */
	char tmp[32];
	sprintf(tmp, "%d", g_settings.screen_StartX);
	setenv("SCREEN_OFF_X", tmp, 1);
	sprintf(tmp, "%d", g_settings.screen_StartY);
	setenv("SCREEN_OFF_Y", tmp, 1);
	sprintf(tmp, "%d", g_settings.screen_EndX);
	setenv("SCREEN_END_X", tmp, 1);
	sprintf(tmp, "%d", g_settings.screen_EndY);
	setenv("SCREEN_END_Y", tmp, 1);

	bool ispip  = strstr(plugin_list[number].pluginfile.c_str(), "pip") != 0;
	//printf("exec: %s pip: %d\n", plugin_list[number].pluginfile.c_str(), ispip);
	if (ispip && !g_RemoteControl->is_video_started)
		return;
	if (plugin_list[number].type == CPlugins::P_TYPE_SCRIPT)
	{
		startScriptPlugin(number);
		return;
	}
#if ENABLE_LUA
	if (plugin_list[number].type == CPlugins::P_TYPE_LUA)
	{
		startLuaPlugin(number);
		return;
	}
#endif
	if (!file_exists(plugin_list[number].pluginfile.c_str()))
	{
		printf("[CPlugins] could not find %s,\nperhaps wrong plugin type in %s\n",
		       plugin_list[number].pluginfile.c_str(), plugin_list[number].cfgfile.c_str());
		return;
	}

	g_RCInput->clearRCMsg();
	g_RCInput->stopInput();

	printf("Starting %s\n", plugin_list[number].pluginfile.c_str());
	my_system(2, plugin_list[number].pluginfile.c_str(), NULL);

	frameBuffer->paintBackground();
	g_RCInput->restartInput();
	g_RCInput->clearRCMsg();
}

bool CPlugins::hasPlugin(CPlugins::p_type_t type)
{
	for (std::vector<plugin>::iterator it=plugin_list.begin();
			it!=plugin_list.end(); ++it)
	{
		if (it->type == type && !it->hide)
			return true;
	}
	return false;
}

const std::string& CPlugins::getScriptOutput() const
{
	return scriptOutput;
}

void CPlugins::delScriptOutput()
{
	scriptOutput.clear();
}

CPlugins::p_type_t CPlugins::getPluginType(int type)
{
	switch (type)
	{
	case PLUGIN_TYPE_DISABLED:
		return P_TYPE_DISABLED;
		break;
	case PLUGIN_TYPE_GAME:
		return P_TYPE_GAME;
		break;
	case PLUGIN_TYPE_TOOL:
		return P_TYPE_TOOL;
		break;
	case PLUGIN_TYPE_SCRIPT:
		return P_TYPE_SCRIPT;
		break;
#if ENABLE_LUA
	case PLUGIN_TYPE_LUA:
		return P_TYPE_LUA;
#endif
	default:
		return P_TYPE_DISABLED;
	}
}