6 use Fcntl qw(SEEK_SET);
11 my($hay,$hay_filename,$offset,$needle,$msg)=@_;
13 die if length($needle)%1;
14 my $len_bytes=length($needle)/2;
15 substr($hay,$offset,$len_bytes) eq pack("H*",$needle)
16 or die "\"$hay_filename\" error reading signature 0x$needle @".sprintf("0x%X",$offset)
17 .(!$msg ? "" : "; $msg")."\n";
20 my $BACKUP_SECTOR_START=63;
21 my $MAX_BOOT_SIZE=0x1b6; # LILO: leave some space for NT's and DR DOS' dirty
24 my $bin_filename="./biosautoraid.bin";
27 my $options_error=!GetOptions(
28 "bin=s" ,\$bin_filename,
29 "i|install" ,\$opt_install,
30 "u|uninstall",\$opt_uninstall,
33 open BIN,$bin_filename or die "open \"$bin_filename\": $!";
34 my $bin=do { local $/; <BIN>; } or die "read \"$bin_filename\": $!";
35 close BIN or die "close \"$bin_filename\": $!";
37 my $bin_len=length($bin);
38 $bin_len>0 && !($bin_len%0x200) or die "Invalid length of \"$bin_filename\": $bin_len";
39 my $bin_short=($bin_len==0x200); # => no 0xBEEF
41 signature $bin,$bin_filename,0x1FE ,"55AA";
42 substr($bin,$MAX_BOOT_SIZE,0x1FE-$MAX_BOOT_SIZE)=~/^\x00*$/s or die "No empty magic+partitiontable: $bin_filename";
44 if (substr($bin,3,8) eq "BIOSRAID") {
45 signature $bin,$bin_filename,0x03 ,unpack("H*","BIOSRAID");
46 signature $bin,$bin_filename,0x43 ,"5E81A2".sprintf("%X",$BACKUP_SECTOR_START);
47 signature $bin,$bin_filename,$bin_len-2,"BEEF" if !$bin_short;
50 signature $bin,$bin_filename,0x03 ,unpack("H*","BIOSRAI2")
51 .sprintf("%X%X",$BACKUP_SECTOR_START,$MAX_BOOT_SIZE-0x100);
56 warn "Syntax: $0 [--bin=<biosautoraid.bin>] [{-i|--install|-u|--uninstall} <device>]" if !$all_ok;
59 if (!@ARGV && !$options_error) {
60 print "OK, \"$bin_filename\" checked.\n";
65 die "Type -i|--install or -u|--uninstall" if (!$opt_install && !$opt_uninstall) || $options_error;
66 die "Both -i|--install and -u|--uninstall forbidden together" if $opt_install && $opt_uninstall;
69 my $device_filename=$ARGV[0];
72 open DEVICE,"+<".$device_filename or die "open \"$device_filename\": $!";
74 my $backup_offset=$BACKUP_SECTOR_START*0x200;
76 sysseek DEVICE,0,SEEK_SET or die "Error seeking $device_filename";
78 $bin_len==sysread DEVICE,$master,$bin_len or die "read \"$device_filename\": $!";
79 length($master)==$bin_len or die "read \"$device_filename\": ".length($master)."!=$bin_len";
80 signature $master,$device_filename,0x1FE,"55AA";
82 sysseek DEVICE,$backup_offset,SEEK_SET or die "Error seeking $device_filename";
84 $bin_len==sysread DEVICE,$backup,$bin_len or die "read \"$device_filename\": $!";
85 length($backup)==$bin_len or die "read \"$device_filename\": ".length($backup)."!=$bin_len";
87 my $zeroes="\x00"x$bin_len;
88 die if length($zeroes)!=$bin_len;
90 $bin=substr($bin,0,$MAX_BOOT_SIZE).substr($master,$MAX_BOOT_SIZE,0x1FE-$MAX_BOOT_SIZE).substr($bin,0x1FE);
92 my $installed=substr($master,0x03,7) eq "BIOSRAI";
93 print "Already instaled? ".($installed ? "YES" : "NO")."\n";
95 die "Nothing to uninstall!\n" if $opt_uninstall && !$installed;
98 signature $master,$device_filename,$bin_len-2,"BEEF","Different installed SECTOR_LEN?" if !$bin_short;
99 signature $master,$device_filename,0x03 ,unpack("H*","BIOSRAI");
100 signature $master,$device_filename,0x43 ,"5E81A2".sprintf("%X",$BACKUP_SECTOR_START) if !$bin_short;
101 signature $backup,"backup",0x1FE,"55AA";
105 if ($backup ne $zeroes) {
106 # Permit different DOS-volume area and 0x1FC..0x1FD bytes.
107 die "Sensitive bytes at backup sectors" if !(1
109 || substr($backup,0x200) eq substr($zeroes,0x200)
110 || (substr($backup,$bin_len-2) eq pack("H*","BEEF") && !$bin_short)
112 && substr($backup,0,0x03) eq substr($master,0,0x03)
113 && substr($backup,0x5A,$MAX_BOOT_SIZE-0x5A) eq substr($master,0x5A,$MAX_BOOT_SIZE-0x5A)
115 warn "WARNING: Dropping obsolete (but similiar) backup! Use --uninstall next time.\n";
117 sysseek DEVICE,$backup_offset,SEEK_SET or die "Error seeking $device_filename";
118 $bin_len==syswrite DEVICE,$master or die "Error backing up the master";
120 sysseek DEVICE,0,SEEK_SET or die "Error seeking $device_filename";
121 $bin_len==syswrite DEVICE,$bin or die "Error writing new master of BIOSautoRAID";
123 if ($opt_uninstall) {
124 sysseek DEVICE,0,SEEK_SET or die "Error seeking $device_filename";
125 $bin_len==syswrite DEVICE,$backup or die "Error writing backup back to the master";
126 sysseek DEVICE,$backup_offset,SEEK_SET or die "Error seeking $device_filename";
127 $bin_len==syswrite DEVICE,$zeroes or die "Error clearing the backup area";
130 close DEVICE or die "close \"$device_filename\": $!";
132 print "OK; ".($opt_install ? ($installed ? "re" : "")."installed" : "uninstalled")."\n";