tests/zfs-tests/cmd/file_check/file_check.c

   1 /*
   2  * CDDL HEADER START
   3  *
   4  * The contents of this file are subject to the terms of the
   5  * Common Development and Distribution License (the "License").
   6  * You may not use this file except in compliance with the License.
   7  *
   8  * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
   9  * or http://www.opensolaris.org/os/licensing.
  10  * See the License for the specific language governing permissions
  11  * and limitations under the License.
  12  *
  13  * When distributing Covered Code, include this CDDL HEADER in each
  14  * file and include the License file at usr/src/OPENSOLARIS.LICENSE.
  15  * If applicable, add the following below this CDDL HEADER, with the
  16  * fields enclosed by brackets "[]" replaced with your own identifying
  17  * information: Portions Copyright [yyyy] [name of copyright owner]
  18  *
  19  * CDDL HEADER END
  20  */
  21
  22 /*
  23  * Copyright 2007 Sun Microsystems, Inc.  All rights reserved.
  24  * Use is subject to license terms.
  25  */
  26
  27 #include "../file_common.h"
  28
  29 static unsigned char bigbuffer[BIGBUFFERSIZE];
  30
  31 /*
  32  * Given a filename, check that the file consists entirely
  33  * of a particular pattern. If the pattern is not specified a
  34  * default will be used. For default values see file_common.h
  35  */
  36 int
  37 main(int argc, char **argv)
  38 {
  39         int             bigfd;
  40         long            i, n;
  41         unsigned char   fillchar = DATA;
  42         int             bigbuffersize = BIGBUFFERSIZE;
  43         int64_t         read_count = 0;
  44
  45         /*
  46          * Validate arguments
  47          */
  48         if (argc < 2) {
  49                 (void) printf("Usage: %s filename [pattern]\n",
  50                     argv[0]);
  51                 exit(1);
  52         }
  53
  54         if (argv[2]) {
  55                 fillchar = atoi(argv[2]);
  56         }
  57
  58         /*
  59          * Read the file contents and check every character
  60          * against the supplied pattern. Abort if the
  61          * pattern check fails.
  62          */
  63         if ((bigfd = open(argv[1], O_RDONLY)) == -1) {
  64                 (void) printf("open %s failed %d\n", argv[1], errno);
  65                 exit(1);
  66         }
  67
  68         do {
  69                 if ((n = read(bigfd, &bigbuffer, bigbuffersize)) == -1) {
  70                         (void) printf("read failed (%ld), %d\n", n, errno);
  71                         exit(errno);
  72                 }
  73
  74                 for (i = 0; i < n; i++) {
  75                         if (bigbuffer[i] != fillchar) {
  76                                 (void) printf("error %s: 0x%x != 0x%x)\n",
  77                                     argv[1], bigbuffer[i], fillchar);
  78                                 exit(1);
  79                         }
  80                 }
  81
  82                 read_count += n;
  83         } while (n == bigbuffersize);
  84
  85         return (0);
  86 }