CHIPMAKER

/*
* main.c -- C Test App.
*
* Copyright (C) 2012-2013, 2013 heesoon.kim <chipmaker.tistory.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; version 2 of the License.
*
* 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.,
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <sys/time.h>
#include <time.h>

static void signal_handler(int sig)
{
	printf("%s : signal received \n", strsignal(sig));
	
}

int main(int argc, char *argv[])
{
	int retval = -1;
	struct sigaction sa;
	struct itimerval itv = {0};
	struct itimerval curitv = {0};
	
	itv.it_interval.tv_sec = 2;
	itv.it_value.tv_sec = 2;
	
	sigemptyset(&sa.sa_mask);
	sa.sa_handler = signal_handler;
	//sa.sa_flags = SA_RESETHAND;
	if(sigaction(SIGALRM, &sa, NULL) == -1)
		perror("sigaction");
	
 	printf("START Timer \n");
	
	setitimer(ITIMER_REAL, &itv, NULL);
	//alarm(2);
	while(1)
	{	
		if(getitimer(ITIMER_REAL, &curitv) == -1)
		{
			perror("getitimer");
			break;
		}
		printf("Remained secs : %ld\n", curitv.it_value.tv_sec);
		sleep(1);
	}
	
	printf("End Timer \n");
	return 0;
}

*
* main.c -- C Test App.
*
* Copyright (C) 2012-2013, 2013 heesoon.kim <chipmaker.tistory.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; version 2 of the License.
*
* 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.,
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <sys/time.h>
#include <time.h>

int main(int argc, char *argv[])
{
	struct timeval tv;
	time_t t;
	
	if(gettimeofday(&tv, NULL) == -1)
		perror("gettimeofday\n");
	
	printf("gettimeofday = %ld, %ld\n", tv.tv_sec, tv.tv_usec);
	
	t = time(NULL);
	if(errno == EFAULT)
		perror("time\n");
	
	printf("time = %ld\n", t);	
	
	printf("current time : %s", ctime(&t));
	printf("current time : %s", ctime(&tv.tv_sec));
	
	return 0;
}

/*
* main.c -- C Test App.
*
* Copyright (C) 2012-2013, 2013 heesoon.kim <chipmaker.tistory.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; version 2 of the License.
*
* 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.,
*/
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <sys/time.h>
#include <time.h>

int main(int argc, char *argv[])
{
	struct tm *t;
	time_t tt;
	
	tt = time(NULL);
	if(errno == EFAULT)
		perror("time\n");

	// GMT Time
	t = gmtime(&tt);	
	printf("gmt time   : %s", asctime(t));
	
	// Local Time
	t = localtime(&tt);
	printf("local time : %s", asctime(t));
	
	return 0;
}