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/*	date - Show the date and time.
 *	Copyright (C) 2022 Ferass EL HAFIDI
 *
 *	Redistribution and use in source and binary forms, with or without 
 *	modification, are permitted provided that the following conditions are met:
 *	
 *	    1. Redistributions of source code must retain the above copyright notice, 
 *	       this list of conditions and the following disclaimer.
 *	    2. Redistributions in binary form must reproduce the above copyright 
 *	       notice, this list of conditions and the following disclaimer in the 
 *	       documentation and/or other materials provided with the distribution.
 *	    3. Neither the name of the copyright holder nor the names of its 
 *	       contributors may be used to endorse or promote products derived from 
 *	       this software without specific prior written permission.
 *	
 *	THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" 
 *	AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 
 *	IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 
 *	ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE 
 *	LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 
 *	CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 
 *	SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 
 *	INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 
 *	CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 
 *	ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 
 *	POSSIBILITY OF SUCH DAMAGE.
 */

#include <time.h>
#include <stdio.h>
#include "version.h"

#ifndef COMPILETIME
#define COMPILETIME
#endif

void printUsage();

int main(int argc, char *argv[]) {
	time_t epoch = time(NULL);
	struct tm* date = localtime(&epoch);
	char date_s[31];
	const char *format;
	if (argc == 2 && argv[1][0] == '+') {
		argv[1]++;
		format = argv[1];
	}
	else {
		format = "%a %b %e %H:%M:%S %Z %Y";
	}
	strftime(date_s, 31, format, date);
	printf("%s\n", date_s);
	return 0;
}

void printUsage() {
	printf("Ferass' Base System. (%s)\n\n"
	"Usage: date [+format]\n\n"
	"Output the date and time.\n\n", COMPILETIME);
}