/* -*- mode: c; c-basic-offset: 8; indent-tabs-mode: nil; -*-
 * vim:expandtab:shiftwidth=8:tabstop=8:
 *
 * GPL HEADER START
 *
 * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
 *
 * This program is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License version 2 only,
 * as published by the Free Software Foundation.
 *
 * 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 version 2 for more details (a copy is included
 * in the LICENSE file that accompanied this code).
 *
 * You should have received a copy of the GNU General Public License
 * version 2 along with this program; If not, see
 * http://www.sun.com/software/products/lustre/docs/GPLv2.pdf
 *
 * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara,
 * CA 95054 USA or visit www.sun.com if you need additional information or
 * have any questions.
 *
 * GPL HEADER END
 */
/*
 * Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.
 * Use is subject to license terms.
 */
/*
 * This file is part of Lustre, http://www.lustre.org/
 * Lustre is a trademark of Sun Microsystems, Inc.
 */

#include <stdio.h>
#include <sys/types.h>
#include <sys/stat.h>
#include <time.h>
#include <errno.h>
#include <string.h>
#include <fcntl.h>
#include <unistd.h>
#include <stdlib.h>

void usage(char *prog)
{
	printf("usage: %s owner filenamefmt count\n", prog);
	printf("       %s owner filenamefmt start count\n", prog);
}

int main(int argc, char ** argv)
{
        int i, rc = 0, mask = 0;
        char format[4096], *fmt;
        char filename[4096];
        long start, last;
	long begin = 0, count;

        if (argc < 4 || argc > 5) {
		usage(argv[0]);
                return 1;
        }

        mask = strtol(argv[1], NULL, 0);

        if (strlen(argv[2]) > 4080) {
                printf("name too long\n");
                return 1;
        }

        start = last = time(0);

	if (argc == 4) {
		count = strtol(argv[3], NULL, 0);
		if (count < 1) {
                        printf("count must be at least one\n");
                        return 1;
                }
	} else {
		begin = strtol(argv[3], NULL, 0);
		count = strtol(argv[4], NULL, 0);
	}

	if (strchr(argv[2], '%')) {
		fmt = argv[2];
        } else {
		sprintf(format, "%s%%d", argv[2]);
		fmt = format;
	}
        for (i = 0; i < count; i++, begin++) {
                sprintf(filename, fmt, begin);
		rc = chown(filename, mask, -1);
                if (rc) {
                        printf("chown (%s) error: %s\n",
                               filename, strerror(errno));
                        rc = errno;
                        break;
                }
                if ((i % 10000) == 0) {
                        printf(" - chowned %d (time %ld ; total %ld ; last "
                               "%ld)\n", i, time(0), time(0) - start,
                               time(0) - last);
                        last = time(0);
                }
        }
        printf("total: %d chowns in %ld seconds: %f chowns/second\n", i,
               time(0) - start, ((float)i / (time(0) - start)));

        return rc;
}