/*
 * CDDL HEADER START
 *
 * The contents of this file are subject to the terms of the
 * Common Development and Distribution License (the "License").
 * You may not use this file except in compliance with the License.
 *
 * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
 * or http://www.opensolaris.org/os/licensing.
 * See the License for the specific language governing permissions
 * and limitations under the License.
 *
 * When distributing Covered Code, include this CDDL HEADER in each
 * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
 * If applicable, add the following below this CDDL HEADER, with the
 * fields enclosed by brackets "[]" replaced with your own identifying
 * information: Portions Copyright [yyyy] [name of copyright owner]
 *
 * CDDL HEADER END
 */

/*
 * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
 * Use is subject to license terms.
 */


#include "file_common.h"

static unsigned char bigbuffer[BIGBUFFERSIZE];

/*
 * Given a filename, check that the file consists entirely
 * of a particular pattern. If the pattern is not specified a
 * default will be used. For default values see file_common.h
 */
int
main(int argc, char **argv)
{
        int             bigfd;
        long            i, n;
        uint8_t         fillchar = DATA;
        int             bigbuffersize = BIGBUFFERSIZE;
        int64_t         read_count = 0;

        /*
         * Validate arguments
         */
        if (argc < 2) {
                (void) printf("Usage: %s filename [pattern]\n",
                    argv[0]);
                exit(1);
        }

        if (argv[2]) {
                fillchar = atoi(argv[2]);
        }

        /*
         * Read the file contents and check every character
         * against the supplied pattern. Abort if the
         * pattern check fails.
         */
        if ((bigfd = open(argv[1], O_RDONLY)) == -1) {
                (void) printf("open %s failed %d\n", argv[1], errno);
                exit(1);
        }

        do {
                if ((n = read(bigfd, &bigbuffer, bigbuffersize)) == -1) {
                        (void) printf("read failed (%ld), %d\n", n, errno);
                        exit(errno);
                }

                for (i = 0; i < n; i++) {
                        if (bigbuffer[i] != fillchar) {
                                (void) printf("error %s: 0x%x != 0x%x)\n",
                                    argv[1], bigbuffer[i], fillchar);
                                exit(1);
                        }
                }

                read_count += n;
        } while (n == bigbuffersize);

        return (0);
}