my_md5sum:

  new file, simulates 'md5sum' as a perl script


BitKeeper/etc/logging_ok:
  Logging to logging@openlogging.org accepted

BitKeeper/etc/logging_ok

@@ -86,6 +86,7 @@ monty@tramp.mysql.fi
 monty@work.mysql.com
 mwagner@cash.mwagner.org
 mwagner@evoq.mwagner.org
+mwagner@here.mwagner.org
 mwagner@work.mysql.com
 mysqldev@build.mysql2.com
 nick@mysql.com

Build-tools/my_md5sum

+#!/usr/bin/perl
+#
+# my_md5sum
+#
+# Script to clone the 'md5sum' command found on modern systems, since that
+# command is not always found on all systems.
+#
+# Use the "--help" option for more info!
+#
+# Written by Matt Wagner <matt@mysql.com>
+#
+use strict;
+use Digest::MD5;
+use Getopt::Long;
+
+my $VER= "1.0";
+
+#
+# Strip the leading path info off the program name ($0). We want 'my_md5sum'
+# not './my_md5sum'.
+#
+$0=~ s/^.*\/(.+)$/$1/;
+
+my ($opt_check, $opt_help)= undef;
+
+GetOptions(
+	"check|c" => \$opt_check,
+	"help|h" => \$opt_help,
+	) || usage(); 
+
+#
+# Put all the [file1 file2 file3 ...]'s into an array
+#
+my @files = @ARGV;
+
+#
+# Give the "--help" text if:
+#  - "--help|-h" was specified
+#  - The number of files given as arguments is nil
+#  - The "--check|-c" option is used with more than one [file] argument
+#
+usage() if $opt_help || $#files == -1 || ($opt_check && $#files > 0);
+
+# If "--check|-c", then go into checking
+if ($opt_check)
+{
+	open (CHECKFILE, $files[0]) or die "$files[0]: $!";
+
+	while (<CHECKFILE>)
+	{
+		#
+		# Goto the next line in the file if it does not match a typical
+		# digest line like:
+		#
+		# f1007efa2c72daa693981ec764cdeaca  Bootstrap
+		#
+		next if $_!~ m/^([a-z0-9]{32})\s+(.+)$/;
+
+		# Collect the trappings from the above regex
+		my $checksum= $1;
+		my $checkfile= $2;
+
+		# Generate a fresh MD5 for the file in question
+		my $digest= &mkmd5($checkfile);
+
+		# Check the fresh MD5 against what is recorded in the file
+		# Print an error message if they don't match
+		print "$0: MD5 check failed for '$checkfile'\n" if $digest ne $checksum;
+	}
+}
+# Else generate the MD5 digest to STDOUT
+else
+{
+	foreach my $file (@files)
+	{
+		my $digest= &mkmd5($file);
+
+		print "$digest  $file\n";
+	}
+}
+
+
+#
+# This routine generates the MD5 digest of a file
+#
+sub mkmd5
+{
+	my $file= shift;
+
+	open (FILE, $file) or die "$file: $!";
+	binmode(FILE);
+
+	my $digest= Digest::MD5->new->addfile(*FILE)->hexdigest;
+
+	close FILE;
+
+	return $digest;
+}
+
+#
+# Print the help text
+#
+sub usage
+{
+	print <<EOF;
+
+$0 version $VER by Matt Wagner <matt\@mysql.com>
+
+Usage:
+$0 [-c [file]] |  [file1...]
+Generates or checks MD5 message digests.
+
+Options:
+-c, --check	Check message digests (default is generate)
+-h, --help	Display this text and exit
+
+The input for -c should be the list of message digests and file names that is
+printed on STDOUT by this program when it generates digests.
+
+EOF
+
+	exit(0);
+}