argo_nodeos_config.cpp 24.6 KB
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#include "headers.hpp"
#include "common.hpp"
#include "aggregatelogger.hpp"
#include "log_option_parser.hpp"
#include "resource_locker.hpp"
#include "string_parser.hpp"

#include <unistd.h>
#include <getopt.h>
#include <cstdlib>
#include <sstream>


uid_t ruid;
uid_t euid;

#define TESTS__

#ifdef TESTS__
void test_logs()
{
	Syslogger syl(ruid);
	Syslogger syl1(ruid, LOG_TYPE_WARNING|LOG_TYPE_DEBUG);
	Filelogger fil(ruid, "log.log", LOG_TYPE_WARNING|LOG_TYPE_ERROR);
	Stderrlogger stl(ruid, LOG_TYPE_INFO|LOG_TYPE_DEBUG);

	Aggregatelogger agl(ruid);
	agl.add_logger(&syl);
	agl.add_logger(&fil);
	agl.add_logger(&stl);

	agl.log(LOG_TYPE_INFO, "Some Info 0");
	agl.log(LOG_TYPE_WARNING, "Some warning 0");
	agl.log(LOG_TYPE_ERROR, "Some error 0");
	agl.log(LOG_TYPE_DEBUG, "Some debug 0");

	agl.add_logger(&syl1);
	agl.log(LOG_TYPE_INFO, "Some Info 1");
	agl.log(LOG_TYPE_WARNING, "Some warning 1");
	agl.log(LOG_TYPE_ERROR, "Some error 1");
	agl.log(LOG_TYPE_DEBUG, "Some debug 1");
}
#endif //TESTS__


Args args={ON_ERROR_STOP};

ILogger* logger = NULL;
static Filelogger *_filelogger = NULL;
static Syslogger *_syslogger = NULL;
static Stderrlogger* _stderrlogger = NULL;
static Aggregatelogger *_aggregatelogger = NULL;
Acl* acl = NULL;

string error_message="";

typedef uint64_t Help_section;
#define HS_ALL				0xffffffffffffffff
#define HS_MISC				1			//--help misc
#define HS_ERROR_BEHAVIOR	(1LLU<<1)	//--help error_behavior
#define HS_LOGGING			(1LLU<<2)	//--help logging
#define HS_DAEMON_MODE		(1LLU<<3)	//--help daemon_mode
#define HS_CONTAINER_CONFIG	(1LLU<<4)	//--help container_config
#define HS_HELP_SECTION		(1LLU<<5)	//--help help_sections

void print_usage(const char* app_name, string help_sections)
{
	if(help_sections == "")
		printf("\n"
			//"\t<----CONVENTIONS---->\n"
			//"\t</----CONVENTIONS---->\n"
			"\n"
			"\t<----DESCRIPTION---->\n"
			"%s is the local node setup command for Argo NodeOs. It is used for compute\n"
			"container creation, management and destruction as well their associated \n"
			"resource allocation and partitioning\n"
			"\t</----DESCRIPTION---->\n"
			, APP_NAME);

	if(help_sections == "" || str_contains(help_sections, "help_sections"))
		printf("\n"
			"\t<----HELP SECTIONS---->\n"
			"Use the \"--help\" command to display the help message and exit.\n"
			"\nInstead of displaying the whole help message, specific help sections\n"
			"can be displayed with --help=\"section_name [section_name ...]\"\n"
			"The available help section names are:\n"
			"\t#) help_section: displays the help about help sections\n"
			"\t#) error_behavior: displays the error behavior command help\n" 
			"\t#) logging: the options to manipulate what and where to log \n"
			"\t   trace and error messages\n"
			"\t#) daemon_mode: the option for executing %s in daemon mode\n"
			RED_TEXT "\t\tNOT IMPLEMENTED YET\n" NEUTRAL_TEXT
			"\t#) container_config: manipulate container configuration \n"
			"\t#) service_os_config: manipulate service_os configuration \n"
			"\t#) misc: options for various other things\n"
			"\t</----HELP SECTIONS---->\n"
			,
			APP_NAME);

	if(help_sections == "" || str_contains(help_sections, "error_behavior"))
		printf("\n"
			"\t<----ERROR BEHAVIOR---->\n"
			"The error behavior describes what happens when an error is encountered\n"
			"during the processing. The two possible behaviours are:\n"
			"\t-STOP: Stop and exit (with possible cleanup) when an error is encountered.\n"
			"\t\tThis is the default behavior!\n"
			"\t-CONTINUE: Skip the erroneous operation but continue with the subsequent ones."
			"\n"
			"\nOption:\n"
			"\t--on_error=STOP|CONTINUE\n"
			"\t</----ERROR BEHAVIOR---->\n"
			);
	
	if(help_sections == "" || str_contains(help_sections, "logging"))
		printf("\n"
			"\t<----LOGGING---->\n"
			"%s LOGGING is used for journaling and diagnostics. \n"
			"There are 3 log channels:\n"
			"\t-syslog\n\t-stderr\n\t-user-supplied file\n"
			"Syslog is enabled by default; and can be disabled only with the right ACL.\n"
			"The other channels can be enabled or disabled on will.\n"
			"Multiple channels can be enabled simultaeously.\n"
			"\n"
			"There are 4 log levels:\n"
			"\tINFO\n"
			"\tWARNING\n"
			"\tERROR\n"
			"\tDEBUG\n"
			"\n"
			"INFO, WARNING and ERROR are enabled by default on syslog. The right ACL\n"
			"is required to modify the log levels of syslog. Any log level can be \n"
			"activated on stderr and file channels without any ACL right.\n"
			"\n"
			"The logging command options have the pattern \n"
			"--log=\"log_channel:[+]|-log_levels[,log_channel:[+]|-log_levels[,log_channel:[+]|-log_levels]]\"\n"
			"\tMultiple log channels can be enabled simultaneously; and for each of them, multiple\n"
			"log levels can be activated(+) or deactivated(-).\n"
			"The + sign for log level activation is optional and assumed by default; but the - sign\n"
			"for log level deactivation is mandatory\n"
			"\tLog channels are named \"syslog\", \"stderr\" and \"file\"\n"
			"\tLog levels are named I, W, E, D, respectively for INFO, WARNING, ERROR and DEBUG.\n"
			"\tIf the log channel is \"file\", the filename is required as a third argument\n"
			"e.g. --log=\"file:+E+D:log_file_name.log\"\n"
			"The log file for the file channel is always appended to if the file had a previous content.\n"
			"\tExamples of options:\n"
			"\t--log=\"syslog:+D\" to enable the debug channel on syslog\n"
			"\t--log=\"syslog:+D-I-W,stderr:+I+W,file:+D:out.log\" to enable DEBUG on syslog, \n"
			"disable INFO and WARNING on syslog; enable INFO and WARNING on stderr; and enable\n"
			"DEBUG on file with an output file named out.log\n"
			"\t</----LOGGING---->\n"
			,
		APP_NAME);

	if(help_sections == "" || str_contains(help_sections, "daemon_mode"))
		printf("\n"
			"\t<----DAEMON MODE----> " RED_TEXT "NOT IMPLEMENTED YET " NEUTRAL_TEXT "\n"
			"In daemon mode, %s runs in  background and receives commands from a client\n"
			"(client is comming soon). In daemon mode, the stderr log channel is not available.\n"
			"Daemon mode is triggered by the option \"--daemon\".\n"
			"\t</----DAEMON---->\n",
			APP_NAME);

	if(help_sections == "" || str_contains(help_sections,"container_config"))
	   printf("\n"
		   "\t<-----CONTAINER CONFIGURATION---->\n"
			"The following configuration \"verbs\" are supported:\n"
			"	#) create_container: create a container\n"
			"	#) delete_container: delete a container\n"
			"	#) show_config: display the current configuration of the node\n"
			"	#) clean_config: Delete all the containers of a node. The ServiceOS remains if it existed\n"
			"	#) alter_container: Modifies an existing container\n"
			"	#) attach_to_container: attach a process or list of processes to a container; so they \n"
			"		would run inside it from there on\n"
			"	#) detach_from_container: detach a process or list of processes from a container. \n"
			"		The detached processes run outside any container (in the ServiceOS if any)\n"
			"	#) migrate_to_container: migrate processes from a given container to another one\n"
			"	#) show_available_resources: Show the resources available for subsequent comntainer creation.\n"
			"\n"
			"\tThe verbs are issued with a list of argument in key-value form. Each set of key-value\n"
			"pair is separated by space. An example of verb command is:\n"
			"	 --verb_name=\"key0:value0 key1:value1 key2:value2 .....\"\n"
			"\nThe values are typed. They can be:\n"
			"	#) String: Any string of alphanumerical character or - or _ (E.g., name:container_0)\n"
			"	#) Boolean: Only the values \"true\" or \"false\" (E.g. load_balancing:false)\n"
			"	#) Array: Array values are comma-separated values of the same type enclosed in square brackets.\n"
			"			Arrays are int by default (E.g., pids:[234,9487,1000] OR pids:<int>[...])\n"
			"			Arrays could be double (E.g., times:<double>[234.12,3.14,2.736])\n"
			"			Arrays could be provided to:"
		    "				overwrite an existing list(E.g., cpus:[1,2...n])\n"
		    "				add to an existing list(E.g., +cpus:[1,2...n])\n"
		    "				remove from an existing list(E.g., -cpus:[1,2...n])\n"
			"\nLong lists of integer values (in arrays) can be compactly specified by resorting to:\n"
			 "	#) Range notation: E.g., cpus:[0-15] would expand to 0,1,2,...,15\n"
			 "	#) Range notation with strides: E.g. cpus:[0-100s5] would expand to 0,5,10,15,...,100\n"
			 "	#) A mix of any of the supported notations: E.g. cpus:[1,2,6,9,10-100s5,235-240] \n"
			 "		would expand to 1,2,6,9,10,15,20,25,...,100,235,236,237,...,240\n"
			"\n"
			"Each verb supports a given sets of key:value pairs. Not all supported key:value pairs\n"
			"are expected for each invocation fo a verb.\n"

			"Here is a listing of verbs-key:value pair associations along with an example:\n"
			"	#) create_container:\n"
			"		##) name (string); mandatory; must be unique\n"
			"		##) cpus (array<int>)\n"
			"		##) mems (array<int>). These are the memory nodes\n"
			"		##) cpu_exclusive (boolean); defaults to true\n"
			"		##) mem_exclusive (boolean); defaluts to false\n"
			"		##) load_balancing (boolean); defaults to false\n"
			"		##) mem_migrate (boolean); defaults to true\n"
			"	E.g., --create_container=\"name:c0 cpus:<int>[0,1] mems:[0] load_balancing:false cpu_exclusive:true mem_exclusive:false\"\n"
			"Comment: Will fail if the name is already taken or if the CPU cores or memory nodes \n"
			"are not available due to exclusivity."
			"\n"
			"\n"
			"	#) delete_container:\n"
			"		##) name (string); mandatory\n"
			"		##) kill_content (boolean).\n"
			"	E.g. --delete_container=\"name:container_name\"\n"
			"Comment: Will fail if the container contains tasks or if it is owned by someone else.\n"
		    "If kill_content:true is specified, a container hosting tasks can still be deleted by its owner.\n"
			"In that case though, all the hosted tasks are first killed. If any of the tasks is not owned \n"
			"by the issuer of the command, the command fails, unless the issuer is root.\n"
			"This command tries as much as possible to be transactional. \n"
			"Either all containers meet the requirements top be deleted or none is\n" 
			"\n"
			"	#) alter_container:\n"
			"		##) name (string); mandatory\n"
			"		##) [+|-]cpus (array<int>)\n"
			"		##) [+|-]mems (array<int>). These are the memory nodes\n"
			"		##) cpu_exclusive (boolean)\n"
			"		##) mem_exclusive (boolean)\n"
			"		##) load_balancing (boolean)\n"
			"		##) mem_migrate (boolean)\n"
			"	E.g., --alter_container=\"name:c0 +mems:[1] -mems[0] cpus:[1-3] load_balancing:true\"\n"
			"\n"
			"show_config accepts no key:value pair. E.g., --show_config\n"
			"\n"
			"	#) clean_config:\n"
			"		##) kill_content (boolean).\n"
			"	E.g. --clean_config\n"
			"Comment: Will fail if any container is not owned by the requester or if any of them contains\n"
			"a task.\n"
		    "If kill_content:true is specified, a container hosting tasks can still be deleted by its owner.\n"
			"In that case though, all the hosted tasks are first killed. If any of the tasks is not owned \n"
			"by the issuer of the command, the command fails, unless the issuer is root.\n"
			"This command tries as much as possible to be transactional. \n"
			"Either all containers meet the requirements top be deleted or none is\n" 
			"\n"
			"	#) attach_to_container:\n"
			"		##) name (string); mandatory\n"
			"		##) pids (array<int>); mandatory\n"
			"	E.g. --attach_to_container=\"name:container_name pids:[list_of_pids]\"\n"
			"Comment: This is transactional. Either all tasks can be attached or none is.\n"
			"The requester must own the container and all the tasks or be root\n"
			"\n"
			"	#) detach_from_container:\n"
			"		##) name (string); mandatory\n"
			"		##) pids (array<int>); mandatory\n"
			"	E.g. --detach_from_container=\"name:container_name pids:[list_of_pids]\"\n"
			"Comment: This is transactional. Either all tasks can be detached or none is.\n"
			"The requester must own the container or be root\n"
			"\n"
			"	#) migrate_to_container:\n"
			"		##) name (string); mandatory\n"
			"		##) pids (array<int>); mandatory\n"
			"	E.g. --migrate_to_container=\"name:container_name pids:[list_of_pids]\"\n"
			"Comment: This is transactional. Either all tasks can be migrated or none is.\n"
			"The requester must own the destination container and all of the implicit source container or be root\n"
			"\n"
			"	#) show_available_resources:\n"
			"		##) shared (bool)\n"
			"	E.g. --show_available_resources  OR  --show_available_resources=\"shared:false\"\n"
			"Comment: By default, the optional argument \"shared\" is true. If it is false, only the resources\n"
			"that can be requested exclusively are shown\n"
		   "\t</-----CONTAINER CONFIGURATION---->\n"
		   );
	
	if(help_sections == "" || str_contains(help_sections, "service_os_config"))
		printf("\n"
		   "\t<-----SERVICE_OS CONFIGURATION---->\n"
			"	#) create_service_os:\n"
			"		##) cpus (array<int>)\n"
			"		##) mems (array<int>). These are the memory nodes\n"
			"		##) mem_migrate (boolean); defaults to true\n"
			"	E.g., --create_service_os=\"mems:[1] cpus:[1-3]\"\n"
			"Comment: Root privileges required.\n"
			"Only one service_os can exist. The command will fail if a service_os already exists.\n"
			"\n"

			"	#) alter_service_os: " RED_TEXT "NOT IMPLEMENTED YET " NEUTRAL_TEXT "\n"
			"		##) [+|-]cpus (array<int>)\n"
			"		##) [+|-]mems (array<int>). These are the memory nodes\n"
			"		##) mem_migrate (boolean)\n"
			"	E.g., --alter_service_os=\"+mems:[1] -mems[0] cpus:[1-3]\"\n"
			"Comment: Root privileges required.\n"
			"\n"

			"	#) delete_service_os:\n"
			"	E.g., --delete_service_os\n"
			"Comment: Root privileges required.\n"
			"\n"
		   "\t</-----SERVICE_OS CONFIGURATION---->\n");

	if(help_sections == "" || str_contains(help_sections, "misc"))
		printf("\n"
			"\t<----MISC---->\n"
			"1-) The binary of %s must be owned by root\n"
			"2-) The exit message of the last execution is appended to the file %s\n"
			"\tThe exit message is also written in syslog, regarless of the specified logging\n"
			"\tstatus of the syslog channel. \n"
			"\tType %s --help=\"logging\" for info about logging.\n"
			"3-) \"--version\" displays the version\n"
			"4-) reset: resets the node config\n"
			"	E.g., --reset\n"
			"Comment: Root privileges required.\n"
			"\n"
			"\t</----MISC---->\n"
			,
			app_name, EXIT_MESSAGE_FILE_NAME, app_name);

	printf("\n");
}

void init()
{
	elevate_privileges();
	_aggregatelogger = new Aggregatelogger(ruid);
	logger = _aggregatelogger;

	int ret = mkdir_p(DEFAULT_ACL_CONFIG_PATH, S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH);
	THROW_IF(ret != 0 && errno != EEXIST, "Failed to create DEFAULT_ACL_CONFIG_PATH");

	ret = mkdir_p(OWNERSHIP_MAP_FOLDER, S_IRWXU | S_IRWXG | S_IROTH | S_IXOTH);
	THROW_IF(ret != 0 && errno != EEXIST, "Failed to create OWNERSHIP_MAP_FOLDER");

	acl = new Acl();
	lower_privileges();
}

void release()
{
	logger = NULL;
	delete _aggregatelogger;
	if(_filelogger)
	{
		delete _filelogger;
		_filelogger = NULL;
	}
	if(_syslogger)
	{
		delete _syslogger;
		_syslogger = NULL;
	}
	if(_stderrlogger)
	{
		delete _stderrlogger;
		_stderrlogger = NULL;
	}
}

bool create_logger(string options, string& err_out)
{
	Log_option_parser lop(options);	
	if(lop.has_error())
	{
		err_out = lop.get_error_message();
		return false;
	}

	Log_dest dest;
	vector< pair<Log_type, Activation> > levels;
	pair<Log_type, Activation> single_level;

	Log_type log_type = LOG_TYPE_INVALID;
	while((dest = lop.get_next_log_dest()) != LOG_DEST_DEV_NULL)
	{
		levels.clear();
		do
		{
			single_level = lop.get_next_level_activation();
			if(single_level.first == LOG_TYPE_INVALID)
				break;
			levels.push_back(single_level);
		}	
		while(true);
		switch(dest)
		{
			log_type = LOG_TYPE_INVALID;
			case LOG_DEST_SYSLOG:
				log_type = SUBSTRACT_LOG_TYPE(LOG_TYPE_ALL, LOG_TYPE_DEBUG); //default for syslog
				for(int i=0; i<(int)levels.size(); i++)
				{
					if(levels[i].second == ACTIVATION_DISABLED)
					{
						if(levels[i].first == LOG_TYPE_INFO)
						{
							if(!acl->is_allowed(ACL_DISABLE_SYSLOG_INFO))
							{
								std::ostringstream oss;
								oss<<"Permission denied! User "<<acl->get_uid()
									<<" is not allowed to deactivate INFO messages in syslog\n";
								err_out = oss.str();
								return false;
							}
							log_type = SUBSTRACT_LOG_TYPE(log_type, LOG_TYPE_INFO);
						}
						if(levels[i].first == LOG_TYPE_WARNING)
						{
							if(!acl->is_allowed(ACL_DISABLE_SYSLOG_WARNING))
							{
								std::ostringstream oss;
								oss<<"Permission denied! User "<<acl->get_uid()
									<<" is not allowed to deactivate WARNING messages in syslog\n";
								err_out = oss.str();
								return false;
							}
							log_type = SUBSTRACT_LOG_TYPE(log_type, LOG_TYPE_WARNING);
						}
						if(levels[i].first == LOG_TYPE_ERROR)
						{
							if(!acl->is_allowed(ACL_DISABLE_SYSLOG_ERROR))
							{
								std::ostringstream oss;
								oss<<"Permission denied! User "<<acl->get_uid()
									<<" is not allowed to deactivate ERROR messages in syslog\n";
								err_out = oss.str();
								return false;
							}
							log_type = SUBSTRACT_LOG_TYPE(log_type, LOG_TYPE_ERROR);
						}
					}
					else
					{
						if(levels[i].first == LOG_TYPE_DEBUG)
							log_type = ADD_LOG_TYPE(log_type, LOG_TYPE_DEBUG);
					}
				}
				_syslogger = new Syslogger(ruid, log_type);
				_aggregatelogger->add_logger(_syslogger);
				break;
			case LOG_DEST_STDERR:
			case LOG_DEST_FILE:
				log_type = LOG_TYPE_INVALID;
			   for(int i=0; i<(int)levels.size(); i++)
			   {
				   if(levels[i].second == ACTIVATION_ENABLED)
					   log_type = ADD_LOG_TYPE(log_type, levels[i].first);
			   }	   
			   if(log_type == LOG_TYPE_INVALID)
				   break;
			   if(dest == LOG_DEST_STDERR)
			   {
				   _stderrlogger = new Stderrlogger(ruid, log_type);
				   _aggregatelogger->add_logger(_stderrlogger);
			   }
			   else
			   {
				   _filelogger = new Filelogger(ruid, lop.get_filename(), log_type);
				   _aggregatelogger->add_logger(_filelogger);
			   }
			   break;
			default:
			   err_out = "Invalid log destination";
			   return false;
		}
	}
	return true;	
}	

enum Option_val
{
	/*--help*/
	OV_HELP = 'h',
	OV_ON_ERROR = 0xff+1,
	OV_LOG,

	/* --version*/
	OV_VERSION,

	/* --show_available_resources*/
	OV_SHOW_AVAILABLE_RESOURCES,

	/*--create_container="name:'c0' cpus:<int>[0,2,4,5,10-100s5,400] mems:[0-3]
	 * load_balancing:true cpu_exclusive:true mem_exclusive:false"
	*--create_container="name:c0 cpus:<int>[0,1] mems:[0]
	 * load_balancing:false cpu_exclusive:true mem_exclusive:false"
	 */
	OV_CREATE_CONTAINER,

	/*--delete_container="name:c0"*/
	OV_DELETE_CONTAINER,

	/*--show_config
	 * */
	OV_SHOW_CONFIG,

	/*--clean-config //This removes all the configs; leaving only the ServiceOS if applciable
	*/
	OV_CLEAN_CONFIG,

	/*--alter_container="name:'c0' cpus:<int>[0,2,4,5,10-100s5,400] mem:[0-3]
	 * load_balancing:true cpu_exclusive:true mem_exclusive:false"
	 * The name here must be an existing container
	 */
	OV_ALTER_CONTAINER,

	/*--attach_to_container="name:c0 pids:[pid list]"
	 * */
	OV_ATTACH_TO_CONTAINER,


	/*--detach_from_container="name:c0 pids:[pid list]"
	 * */
	OV_DETACH_FROM_CONTAINER,

	/*--migrate_to_container="name:c0 pids:[pid list]"
	 */
	OV_MIGRATE_TO_CONTAINER,

	OV_CREATE_SERVICE_OS, //need to be root


	OV_ALTER_SERVICE_OS,  //need to be root

	OV_DELETE_SERVICE_OS,

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	OV_RESET,

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	/*--exec="name:'c0' argv='argv0 argv1'" env='env1=val1 env2=val2'*/
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	OV_EXEC
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};


struct option long_options[] = {
	{"help", optional_argument, NULL, OV_HELP}, 
	{"on_error", required_argument, NULL, OV_ON_ERROR},
	{"log", required_argument, NULL, OV_LOG},
	{"version", no_argument, NULL, OV_VERSION},
	{"show_available_resources", optional_argument, NULL, OV_SHOW_AVAILABLE_RESOURCES},
	{"create_container", required_argument, NULL, OV_CREATE_CONTAINER},
	{"delete_container", required_argument, NULL, OV_DELETE_CONTAINER},
	{"alter_container", required_argument, NULL, OV_ALTER_CONTAINER},
	{"create_service_os", required_argument, NULL, OV_CREATE_SERVICE_OS},
	{"alter_service_os", required_argument, NULL, OV_ALTER_SERVICE_OS},
	{"delete_service_os", no_argument, NULL, OV_DELETE_SERVICE_OS},
	{"show_config", no_argument, NULL, OV_SHOW_CONFIG},
	{"clean_config", optional_argument, NULL, OV_CLEAN_CONFIG},
	{"attach_to_container", required_argument, NULL, OV_ATTACH_TO_CONTAINER},
	{"detach_from_container", required_argument, NULL, OV_DETACH_FROM_CONTAINER},
	{"migrate_to_container", required_argument, NULL, OV_MIGRATE_TO_CONTAINER},
	{"reset", no_argument, NULL, OV_RESET},
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	{"exec", required_argument, NULL, OV_EXEC},
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		{0, 0, 0, 0}
};

bool cmd_error = false;

/*
 * If a help or version request is found, it is processed and then true is returned
 * */
bool parse_for_help_or_version(int argc, char** argv)
{
	int c;
	int index;
	optind = 1;
	while((c = getopt_long(argc, argv, "h", long_options, 
					&index)) != -1)
	{
		if(c == OV_HELP)
		{
			print_usage(argv[0], optarg ? optarg : "");
			return true;
		}
		else if(c == OV_VERSION)
		{
			printf("%s version %s\n\n", APP_NAME, VERSION);
			return true;
		}
		else if(c == '?' || c == ':')
		{
			cmd_error = true;
			return false;
		}
	}
	return false;
}


bool parse_for_environment(int argc, char** argv)
{
	int c;
	int index;

	optind = 1;
	while((c = getopt_long(argc, argv, "h", long_options, 
					&index)) != -1)
	{
		switch(c)
		{
			case OV_ON_ERROR:
				if(strcmp(optarg, "STOP") == 0)
					args.error_behavior = ON_ERROR_STOP;
				else if(strcmp(optarg, "CONTINUE") == 0)
					args.error_behavior = ON_ERROR_CONTINUE;
				else
				{
					error_message = 
						"Unsupported error behavior (weird \"--on_error\" argument)\n";
					goto __END_PARSING;
				}
				break;
			case OV_LOG:
				if(!create_logger(optarg, error_message))
					goto __END_PARSING;
				break;
			case '?':
			case ':':
				cmd_error = true;
				error_message = "Invalid command line option";
		}
	}

__END_PARSING:
	if(error_message != "")
	{
		std::cerr<<std::endl<<error_message<<std::endl;
		fprintf(stderr, "Execute %s -h for help\n\n", APP_NAME);
		return false;
	}

	return true;
}

bool parse_for_node_config(int argc, char** argv, Container_manager& cm)
{

	int c;
	int index;

	optind = 1;

	while((c = getopt_long(argc, argv, "h", long_options, 
					&index)) != -1)
	{
		switch(c)
		{
			case OV_HELP:
			case OV_ON_ERROR:
				break;  //handled elsewhere
			case OV_SHOW_AVAILABLE_RESOURCES:
				cm.show_available_resources(optarg ? optarg : "");
				break;
			case OV_CREATE_CONTAINER:
				cm.create_container(optarg);
				break;
			case OV_DELETE_CONTAINER:
				cm.delete_container(optarg);
				break;
			case OV_ALTER_CONTAINER:
				cm.alter_container(optarg);
				break;
			case OV_CREATE_SERVICE_OS:
				cm.create_service_os(optarg);
				break;
			case OV_ALTER_SERVICE_OS:
				cm.alter_service_os(optarg);
				break;
			case OV_DELETE_SERVICE_OS:
				cm.delete_service_os();
				break;
			case OV_SHOW_CONFIG:
				cm.show_config();
				break;
			case OV_CLEAN_CONFIG:
				cm.clean_config(optarg ? optarg : "");
				break;
			case OV_ATTACH_TO_CONTAINER:
				cm.attach_to_container(optarg);
				break;
			case OV_DETACH_FROM_CONTAINER:
				cm.detach_from_container(optarg);
				break;
			case OV_MIGRATE_TO_CONTAINER:
				cm.migrate_to_container(optarg);
				break;
			case OV_RESET:
				cm.reset();
				break;
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			case OV_EXEC:
				cm.exec(optarg);
				break;
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			case '?':
			case ':':
				cmd_error = true;
			default:
				return false;
		}
	}

	if(error_message != "")
	{
		std::cerr<<std::endl<<error_message<<std::endl;
		fprintf(stderr, "Execute %s -h for help\n\n", APP_NAME);
		return false;
	}

	return true;
}

int main(int argc, char** argv)
{
	ruid = getuid();
	euid = geteuid();
	//test_logs();
	lower_privileges();
	try
	{
		init();
	}
	catch(const std::runtime_error& e)
	{
		release();
		argo_exit(EXIT_FAILURE, e.what());
	}

	if(parse_for_help_or_version(argc, argv) || cmd_error)
	{
		release();
		if(cmd_error)
			argo_exit(EXIT_FAILURE, "Invalid command line");
		argo_exit(EXIT_SUCCESS, "Help invoked");
	}

	if(!parse_for_environment(argc, argv) || cmd_error)
	{
		release();
		argo_exit(EXIT_FAILURE, error_message);
	}

	Resource_locker rlock(LOCK_FILE_NAME, LOCK_FILE_FOLDER);
	while(!rlock.trylock());

	Container_manager *cm = NULL;

	try
	{
		cm = new Container_manager(logger, args.error_behavior);

		if(!parse_for_node_config(argc, argv, *cm))
		{
			delete cm;
			rlock.unlock();
			release();
			argo_exit(EXIT_FAILURE, error_message);
		}
	}
	catch(const std::runtime_error& e)
	{
		if(cm)
			delete cm;
		rlock.unlock();
		release();
		argo_exit(EXIT_FAILURE, e.what());
	}

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	char** exec_argv = cm->get_exec_argv();
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	char** exec_env = cm->get_exec_env();
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	delete cm;

	rlock.unlock();
	release();
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	/* We perform the execve(2) after all the cleanup is done.  */
	if (exec_argv)
	{
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	    if (setuid(getuid()) == -1)
		argo_exit(EXIT_FAILURE, "Dropping privileges failed", errno);
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	    execvpe(exec_argv[0], exec_argv, exec_env);
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	    argo_exit(EXIT_FAILURE, "Command execution failed", errno);
	}

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	argo_exit(EXIT_SUCCESS);
	return 0;
}