/******************************************************************************/
/*                                                                            */
/* Copyright (c) 2009 FUJITSU LIMITED                                         */
/*                                                                            */
/* 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 2 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, write to the Free Software               */
/* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA    */
/*                                                                            */
/* Author: Li Zefan <lizf@cn.fujitsu.com>                                     */
/*                                                                            */
/******************************************************************************/

#include <sys/types.h>
#include <sys/stat.h>
#include <unistd.h>
#include <stdio.h>
#include <string.h>

/*
 * Usage: file_time <filename> <atime|mtime|ctime> <sec|nsec>
 */
int main(int argc, char *argv[])
{
	time_t t;
	struct stat st;

	if (argc != 4) {
		fprintf(stderr, "Wrong argument num!\n");
		return 1;
	}

	if (stat(argv[1], &st) != 0) {
		perror("stat failed");
		return 1;
	}

	if (strcmp(argv[3], "sec") == 0) {
		if (strcmp(argv[2], "atime") == 0)
			t = st.st_atime;
		else if (strcmp(argv[2], "mtime") == 0)
			t = st.st_mtime;
		else
			t = st.st_ctime;
	} else if (strcmp(argv[3], "nsec") == 0) {
		if (strcmp(argv[2], "atime") == 0)
			t = st.st_atim.tv_nsec;
		else if (strcmp(argv[2], "mtime") == 0)
			t = st.st_mtim.tv_nsec;
		else
			t = st.st_ctim.tv_nsec;
	} else {
		fprintf(stderr, "Wrong argument: %s\n", argv[3]);
		return 1;
	}

	printf("%lu\n", t);

	return 0;
}