main.c
author Mahlon E. Smith <mahlon@laika.com>
Wed, 09 Nov 2011 16:02:57 -0800
changeset 19 e8d144ca2acd
parent 17 bd746609ba46
child 22 822094314703
permissions -rw-r--r--
Added tag 0.1 for changeset d4ce82194b64
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/* vim: set noet nosta sw=4 ts=4 ft=c : */
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/*
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Copyright (c) 2011, Mahlon E. Smith <mahlon@martini.nu>
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All rights reserved.
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Redistribution and use in source and binary forms, with or without
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modification, are permitted provided that the following conditions are met:
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    * Redistributions of source code must retain the above copyright
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      notice, this list of conditions and the following disclaimer.
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    * Redistributions in binary form must reproduce the above copyright
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      notice, this list of conditions and the following disclaimer in the
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      documentation and/or other materials provided with the distribution.
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    * Neither the name of Mahlon E. Smith nor the names of his
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      contributors may be used to endorse or promote products derived
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      from this software without specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND ANY
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EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE REGENTS AND CONTRIBUTORS BE LIABLE FOR ANY
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DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
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ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include "volta.h"
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#include "db.h"
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struct v_globals v;
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/*
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 * Parse command line options, perform actions, and enter accept loop.
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 *
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 */
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int
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main( int argc, char *argv[] )
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{
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#ifdef DEBUG
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	/* debugmode set at compile time?  default to crankin' up the level */
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	v.debugmode = 99;
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#else
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	v.debugmode = 0;
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#endif
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	/* defaults and global initalizations */
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	strcpy( v.dbname, "volta.db" );
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	char create_db[30]   = "";
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	v.timer.db_lastcheck = 0;
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	v.timer.start        = time( NULL );
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	v.timer.lines        = 0;
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	/* get_opt vars */
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	int opt = 0;
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	extern char *optarg;
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	extern int opterr, optind, optopt;
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	/* parse options */
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	opterr = 0;
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	while ( (opt = getopt( argc, argv, "c:d:f:hv" )) != -1 ) {
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		switch ( opt ) {
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			/* create a new cdb file from ascii input */
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			case 'c':
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				strncpy( create_db, optarg, sizeof(create_db) );
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				break;
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			/* debug */
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			case 'd':
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				if ( optarg[2] == '-' ) {
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					argc++; argv -= 1;
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					v.debugmode = 1;
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				}
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				sscanf( optarg, "%hu", &v.debugmode );
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				break;
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			/* database filename */
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			case 'f':
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				strncpy( v.dbname, optarg, sizeof(v.dbname) );
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				break;
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			/* help */
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			case 'h':
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				usage( argv[0] );
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				return( 0 );
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			/* version */
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			case 'v':
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				printf( "%s %s\n", PROG, VERSION );
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				return( 0 );
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			/* unknown option or option argument missing */
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			case '?':
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				switch( optopt ) {
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					case 'd': /* no debug argument, default to level 1 */
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						v.debugmode = 1;
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						break;
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					default:
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						usage( argv[0] );
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						return( 1 );
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				}
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			default:
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				break;
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		}
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	}
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	argc -= optind;
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	argv += optind;
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	/* create a new database if requested */
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	if ( (int)strlen(create_db) > 0 ) {
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		return( db_create_new( create_db ) );
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	}
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	/* enter stdin parsing loop */
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	(void)signal( SIGINT, shutdown_handler );
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	unsigned char exitval = accept_loop();
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	shutdown_actions();
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	return( exitval );
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}
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/*
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 * Perform actions in preparation for a graceful shutdown.
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 *
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 */
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void
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shutdown_actions( void )
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{
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	cdb_free( &v.db );
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	close( v.db_fd );
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	report_speed();
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}
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/*
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 * Signal handler for shutting things down.
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 *
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 */
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void
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shutdown_handler( int sig )
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{
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	debug( 1, LOC, "Exiting via signal %d.\n", sig );
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	shutdown_actions();
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	exit( 0 );
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}
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