misc/archive/cdromchk.c

   1 /* gcc -O2 -Wall cdromchk.c -o cdromchk
   2  *
   3  * --- T2-COPYRIGHT-NOTE-BEGIN ---
   4  * This copyright note is auto-generated by ./scripts/Create-CopyPatch.
   5  *
   6  * T2 SDE: misc/archive/cdromchk.c
   7  * Copyright (C) 2004 - 2005 The T2 SDE Project
   8  * Copyright (C) 1998 - 2003 ROCK Linux Project
   9  *
  10  * More information can be found in the files COPYING and README.
  11  *
  12  * This program is free software; you can redistribute it and/or modify
  13  * it under the terms of the GNU General Public License as published by
  14  * the Free Software Foundation; version 2 of the License. A copy of the
  15  * GNU General Public License can be found in the file COPYING.
  16  * --- T2-COPYRIGHT-NOTE-END ---
  17  */
  18
  19 #include <stdio.h>
  20 #include <sys/types.h>
  21 #include <sys/stat.h>
  22 #include <fcntl.h>
  23 #include <unistd.h>
  24 #include <errno.h>
  25 #include <string.h>
  26
  27 int main(int argc, char ** argv) {
  28         int cdrom,file;
  29         char buf1[4096];
  30         char buf2[4096];
  31         int rc1,rc2,rc3;
  32         int c1=0,c2=0;
  33
  34         if (argc != 3) {
  35                 fprintf(stderr,"Usage: %s <cdrom> <iso-file>\n",argv[0]);
  36                 return 1;
  37         }
  38
  39         fprintf(stderr,"Checking CD-ROM ...");
  40
  41         if ( (cdrom=open(argv[1],O_RDONLY|O_SYNC)) == 0 ) {
  42                 fprintf(stderr,"\n%s: Can't open %s: %s\n",
  43                         argv[0],argv[1],strerror(errno));
  44                 return 1;
  45         }
  46
  47         if ( (file=open(argv[2],O_RDONLY)) == 0 ) {
  48                 fprintf(stderr,"\n%s: Can't open %s: %s\n",
  49                         argv[0],argv[2],strerror(errno));
  50                 return 1;
  51         }
  52
  53         while ( (rc1=read(file,buf1,4096)) > 0 ) {
  54                 for (rc2=0; rc2 < rc1; rc2+=rc3) {
  55                         rc3=read(cdrom,buf2+rc2,rc1-rc2);
  56                         if (rc3 == -1) {
  57                                 fprintf(stderr,"\n%s: cdrom read error: %s\n",
  58                                         argv[0],strerror(errno));
  59                                 return 1;
  60                         }
  61                         if (rc3 == 0) break;
  62                 }
  63                 if (rc2 != rc1) {
  64                         fprintf(stderr,"\n%s: cdrom read error: %d of "
  65                                 "%d bytes\n",argv[0],rc2,rc1);
  66                         return 1;
  67                 }
  68                 if (memcmp(buf1,buf2,rc2)) {\
  69                         fprintf(stderr,"\n%s: cdrom data differs from "
  70                                 "the iso file\n",argv[0]);
  71                         return 1;
  72                 }
  73                 c1+=rc2; c2+=rc2;
  74                 if (c1 > (1048576*16)) {
  75                         c1=0;
  76                         fprintf(stderr,".");
  77                 }
  78         }
  79
  80         if (rc1 == -1) {
  81                 fprintf(stderr,"\n%s: file read error: %s\n",
  82                         argv[0],strerror(errno));
  83                 return 1;
  84         }
  85
  86         fprintf(stderr," OK (%d MB).\n",c2/1048576);
  87         return 0;
  88 }