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 /*
  28  * Copyright 2022 MNX Cloud, Inc.
  29  */
  30 
  31 #include "../file_common.h"
  32 
  33 static unsigned char bigbuffer[BIGBUFFERSIZE];
  34 
  35 /*
  36  * Given a filename, check that the file consists entirely
  37  * of a particular pattern. If the pattern is not specified a
  38  * default will be used. For default values see file_common.h
  39  */
  40 int
  41 main(int argc, char **argv)
  42 {
  43         int             bigfd;
  44         long            i, n;
  45         uchar_t         fillchar = DATA;
  46         int             bigbuffersize = BIGBUFFERSIZE;
  47         int64_t         read_count = 0;
  48 
  49         /*
  50          * Validate arguments
  51          */
  52         if (argc < 2) {
  53                 (void) printf("Usage: %s filename [pattern]\n",
  54                     argv[0]);
  55                 exit(1);
  56         }
  57 
  58         if (argv[2]) {
  59                 fillchar = atoi(argv[2]);
  60         }
  61 
  62         /*
  63          * Read the file contents and check every character
  64          * against the supplied pattern. Abort if the
  65          * pattern check fails.
  66          */
  67         if ((bigfd = open(argv[1], O_RDONLY)) == -1) {
  68                 (void) printf("open %s failed %d\n", argv[1], errno);
  69                 exit(1);
  70         }
  71 
  72         do {
  73                 int exitcode;
  74 
  75                 if ((n = read(bigfd, &bigbuffer, bigbuffersize)) == -1) {
  76                         exitcode = errno;
  77                         (void) printf("read failed (%ld), %d\n", n, errno);
  78                         exit(exitcode);
  79                 }
  80 
  81                 for (i = 0; i < n; i++) {
  82                         if (bigbuffer[i] != fillchar) {
  83                                 (void) printf("error %s: 0x%x != 0x%x)\n",
  84                                     argv[1], bigbuffer[i], fillchar);
  85                                 exit(1);
  86                         }
  87                 }
  88 
  89                 read_count += n;
  90         } while (n == bigbuffersize);
  91 
  92         return (0);
  93 }