/usr/bin/crc32 is in libarchive-zip-perl 1.60-1ubuntu0.1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 | #!/usr/bin/perl
# Computes and prints to stdout the CRC-32 values of the given files
use 5.006;
use strict;
use lib qw( blib/lib lib );
use Archive::Zip;
use FileHandle;
use vars qw( $VERSION );
BEGIN {
$VERSION = '1.51';
}
my $totalFiles = scalar(@ARGV);
foreach my $file (@ARGV) {
if ( -d $file ) {
warn "$0: ${file}: Is a directory\n";
next;
}
my $fh = FileHandle->new();
if ( !$fh->open( $file, 'r' ) ) {
warn "$0: Cannot open $file: $!\n";
next;
}
binmode($fh);
my $buffer;
my $bytesRead;
my $crc = 0;
while ( $bytesRead = $fh->read( $buffer, 32768 ) ) {
$crc = Archive::Zip::computeCRC32( $buffer, $crc );
}
my $fileCrc = sprintf("%08x", $crc);
printf("$fileCrc");
print("\t$file") if ( $totalFiles > 1 );
if ( $file =~ /[^[:xdigit:]]([[:xdigit:]]{8})[^[:xdigit:]]/ ) {
my $filenameCrc = $1;
if ( lc($filenameCrc) eq lc($fileCrc) ) {
print("\tOK")
} else {
print("\tBAD $fileCrc != $filenameCrc");
}
}
print("\n");
}
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