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/*
Copyright (C) 2008 Andreas Baumann <abaumann@yahoo.com>
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 3 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, see <http://www.gnu.org/licenses/>.
*/
#include "port/string.h" /* for strdup, memset */
#include "port/stdio.h" /* for fprintf */
#define DEFAULT_TEXT_DOMAIN CMDLINE_PARSER_PACKAGE
#include "port/gettext.h" /* for i18n */
#include "errors.h" /* global error codes */
#include "log/log.h" /* logging facility */
#include "log/messages.h" /* for i18n */
#include "daemon/daemon.h" /* Unix daemonizing code */
#include "daemon/signals.h" /* signal suspension */
#include <unistd.h> /* for exit, unistd, getuid, getppid */
#include <stdlib.h> /* for EXIT_FAILURE, EXIT_SUCCESS */
/* local message identifiers, we use the category of the daemon in WolfBones
*/
#define WOLF_MSG_DAEMON_TESTING_CONFIGURATION WOLF_MSG_DAEMON_USER_BASE+1
#define WOLF_MSG_DAEMON_STARTED_DAEMON WOLF_MSG_DAEMON_USER_BASE+2
#define WOLF_MSG_DAEMON_SUSPENDING_ON_SIGNAL_ERROR WOLF_MSG_DAEMON_USER_BASE+3
#define WOLF_MSG_DAEMON_REREADING_CONFIGURATION WOLF_MSG_DAEMON_USER_BASE+4
#define WOLF_MSG_DAEMON_GOT_TERMINATION_SIGNAL WOLF_MSG_DAEMON_USER_BASE+5
#define WOLF_MSG_DAEMON_UNEXPECED_SIGNAL WOLF_MSG_DAEMON_USER_BASE+6
#define WOLF_MSG_DAEMON_STOPPED_DAEMON WOLF_MSG_DAEMON_USER_BASE+7
#ifndef MAKE_DEPENDENCIES
#include "testd_cmdline.h" /* for command line and option parsing (gengetopt) */
#endif
#define DEFAULT_CONFIG_FILE "/etc/" CMDLINE_PARSER_PACKAGE ".conf"
static int parse_options_and_arguments( int argc, char *argv[], struct gengetopt_args_info *args_info ) {
struct cmdline_parser_params params;
cmdline_parser_params_init( ¶ms );
params.override = 1;
params.initialize = 0;
params.check_required = 1;
cmdline_parser_init( args_info );
if( cmdline_parser_ext( argc, argv, args_info, ¶ms ) != 0 ) {
cmdline_parser_free( args_info );
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
static int test_config( const char *filename ) {
wolf_log( WOLF_LOG_NOTICE, WOLF_CATEGORY_DAEMON, WOLF_MSG_DAEMON_TESTING_CONFIGURATION,
_( "Testing configuraton read from '%s'" ), filename );
return EXIT_SUCCESS;
}
static int read_config( const char *filename, struct gengetopt_args_info *args_info ) {
char *config_filename = strdup( filename );
struct cmdline_parser_params params;
cmdline_parser_params_init( ¶ms );
params.override = 0;
params.initialize = 0;
params.check_required = 1;
if( cmdline_parser_config_file( config_filename, args_info, ¶ms ) != 0 ) {
/* TODO: gengetopt must support i18n for this */
fprintf( stderr, "\n%s\n", gengetopt_args_info_usage );
cmdline_parser_free( args_info );
free( config_filename );
return EXIT_FAILURE;
}
free( config_filename );
return EXIT_SUCCESS;
}
int main( int argc, char *argv[] ) {
struct gengetopt_args_info args_info;
wolf_error_t error;
wolf_daemon_params_t daemon_params;
wolf_daemon_p demon = NULL;
int sig = 0;
wolf_port_initialize_i18n( argv[0], "libwolf" );
wolf_port_initialize_i18n( argv[0], CMDLINE_PARSER_PACKAGE );
if( parse_options_and_arguments( argc, argv, &args_info ) == EXIT_FAILURE ) {
exit( EXIT_FAILURE );
}
if( read_config( args_info.config_file_given ?
args_info.config_file_arg : DEFAULT_CONFIG_FILE, &args_info ) == EXIT_FAILURE ) {
exit( EXIT_FAILURE );
}
if( args_info.test_given ) {
cmdline_parser_free( &args_info );
exit( test_config( args_info.config_file_given ?
args_info.config_file_arg : DEFAULT_CONFIG_FILE ) );
}
wolf_log_openlogtostderr( (wolf_log_level_t)((int)WOLF_LOG_DEBUG - 1 + (int)args_info.debug_given) );
if( args_info.logfile_given )
wolf_log_openlogtofile( args_info.logfile_arg,
args_info.logfile_level_given ?
wolf_log_str_to_level( args_info.logfile_level_arg ) : WOLF_LOG_NOTICE );
if( !args_info.foreground_given ) {
wolf_log_openlogtosyslog( CMDLINE_PARSER_PACKAGE,
args_info.syslog_facility_given ?
wolf_log_str_to_syslog_facility( args_info.syslog_facility_arg ) : WOLF_LOG_DAEMON,
args_info.syslog_level_given ?
wolf_log_str_to_level( args_info.syslog_level_arg ) : WOLF_LOG_NOTICE,
WOLF_LOG_SYSLOG_DEFAULT_OPTIONS );
memset( &daemon_params, 0, sizeof( daemon_params ) );
daemon_params.daemon_name = CMDLINE_PARSER_PACKAGE;
daemon_params.pid_filename = args_info.pidfile_given ?
args_info.pidfile_arg : NULL;
daemon_params.group_name = args_info.group_given ?
args_info.group_arg : NULL;
daemon_params.user_name = args_info.user_given ?
args_info.user_arg : NULL;
demon = wolf_daemon_new( daemon_params, &error );
if( demon == NULL ) {
cmdline_parser_free( &args_info );
exit( EXIT_FAILURE );
}
if( ( error = wolf_daemon_start( demon ) ) != WOLF_OK ) {
cmdline_parser_free( &args_info );
wolf_daemon_exit( demon );
}
} else {
if( ( error = wolf_daemon_signals_initialize( ) ) != WOLF_OK ) {
cmdline_parser_free( &args_info );
exit( EXIT_FAILURE );
}
if( ( error = wolf_daemon_signals_install_handlers( ) ) != WOLF_OK ) {
wolf_daemon_signals_terminate( );
cmdline_parser_free( &args_info );
exit( EXIT_FAILURE );
}
}
wolf_log( WOLF_LOG_NOTICE, WOLF_CATEGORY_DAEMON, WOLF_MSG_DAEMON_STARTED_DAEMON,
_( "Started %s daemon" ), CMDLINE_PARSER_PACKAGE );
while( ( sig != SIGTERM ) && ( sig != SIGINT ) && ( sig != -1 ) ) {
sig = wolf_daemon_signals_suspend( 60, &error );
switch( sig ) {
case 0: /* timeout */
break;
case -1: /* internal error */
wolf_log( WOLF_LOG_CRIT, WOLF_CATEGORY_DAEMON, WOLF_MSG_DAEMON_SUSPENDING_ON_SIGNAL_ERROR,
_( "Suspending on UNIX signal resulted in an error %d!" ),
error );
break;
case SIGHUP:
wolf_log( WOLF_LOG_NOTICE, WOLF_CATEGORY_DAEMON, WOLF_MSG_DAEMON_REREADING_CONFIGURATION,
_( "Rereading configuration" ) );
break;
case SIGTERM:
case SIGINT:
wolf_log( WOLF_LOG_NOTICE, WOLF_CATEGORY_DAEMON, WOLF_MSG_DAEMON_GOT_TERMINATION_SIGNAL,
_( "Got termination signal, shutting down the daemon" ) );
break;
case SIGUSR1:
break;
case SIGUSR2:
break;
default:
wolf_log( WOLF_LOG_ERR, WOLF_CATEGORY_DAEMON, WOLF_MSG_DAEMON_UNEXPECED_SIGNAL,
_( "Unexpected signal '%s' (%s)" ),
wolf_signal_get_long_name( sig ),
wolf_signal_get_short_name( sig ) );
}
}
wolf_log( WOLF_LOG_NOTICE, WOLF_CATEGORY_DAEMON, WOLF_MSG_DAEMON_STOPPED_DAEMON,
_( "Stopped %s daemon" ), CMDLINE_PARSER_PACKAGE );
wolf_log_closelogtofile( );
if( !args_info.foreground_given ) {
wolf_log_closelogtosyslog( );
cmdline_parser_free( &args_info );
wolf_daemon_exit( demon );
} else {
cmdline_parser_free( &args_info );
wolf_daemon_signals_terminate( );
exit( EXIT_SUCCESS );
}
exit( EXIT_FAILURE );
}
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