From: shipley@dis.org
Date: Mon, 1 Feb 93 04:30:16 PST
To: cypherpunks@toad.com
Subject: mh wrappers for pgp.
Message-ID: <9302011223.AA06080@merde.dis.org>
MIME-Version: 1.0
Content-Type: text/plain




-----BEGIN PGP SIGNED MESSAGE-----




#!/usr/local/bin/tperl4.010
#!/usr/local/bin/perl

# pgpedit V1.0
# Mon Feb  1 04:10:42 PST 1993
# Peter Shipley (shipley@utter.dis.org -or- shipley@berkeley.edu)

# to install (mh instructions)
# place this script in your path (eg ~/bin)
# create few links:
#
#       ln -s /usr/local/mh/bin/repl ~/bin/pgprepl
#       ln -s /usr/local/mh/bin/comp ~/bin/pgpcomp
#
# Add the following to your .mh_profile:
#
#       pgprepl: -editor pgpedit
#       pgpcomp: -editor pgpedit
#
# To use just use the commands pgprepl or pgpcomp instead of repl or comp
#



require "sys/wait.ph";

#custom stuff here

#default editor
$defaulteditor="/usr/ucb/vi";


$pgpcommand="/usr/local/bin/pgp -sta +clearsig=on";

$debug=0;

#test the arg count
    die "bad argument count" if ($#ARGV > 0);

#set the umask to something really paranoid
    umask(07177);

#set the path if there is not one
    $ENV{'PATH'} = '/bin:/usr/ucp:/usr/bin' unless $ENV{'PATH'};

# get the editor
    if ($ENV{'VISUAL'}) {
	$editor=$ENV{'VISUAL'} ;
    } elsif ($ENV{'EDITOR'}) {
	$editor=$ENV{'EDITOR'} ;
    } else {
	$editor = $defaulteditor;
    }

    $editor = $defaulteditor if $editor =~ /pgpedit/ ;

# prepare the file.
    &prepfile($ARGV[0]);

# run the editor
    &runeditor($ARGV[0]);

# have pgp sign the file
    &SignMailFile($ARGV[0]);

# the end
    exit 0;




sub SignMailFile {

    local($INPUT) = @_;

    local($BODY) = "/tmp/pgp$$.body";
    local($PGPBODY) = "$BODY".".asc";


    print "$INPUT \n" if ($debug);

    open(INPUT, "+>>$INPUT" ) || die "failed to open $INPUT: $!\n";
    seek(INPUT,0, 0);

    open(BODY, "+>$BODY") || die "failed to open $BODY: $!\n";
    select(BODY); $| = 1; select(STDOUT);

line:
    while (<INPUT>) {
	if (/^--------/) {
	    $where = tell;
	    last;
	}
    }


    print STDERR "$BODY \n" if ($debug);

    while (<INPUT>) {
	print BODY $_;
    }

    print STDERR  "$pgpcommand $BODY\n" if ($debug);

    `$pgpcommand $BODY`;

    truncate(BODY, 0); unlink($BODY); close(BODY);


    open(PGPBODY) || die "failed to open $PGPBODY: $!\n";

    truncate(INPUT,$where) || warn "failed to truncate file $FILE: $!\n";
    seek(INPUT,$where,0);

    print INPUT "\n\n";

    print INPUT <PGPBODY>;

    truncate(PGPBODY, 0); unlink($PGPBODY); close(PGPBODY);

    return;
}




sub prepfile {

    local($FILE) = @_;
    local(@data);


    open(FILE, "+>>$FILE" ) || die "failed to open $FILE: $!\n";
    seek(FILE, 0, 0);

    while(<FILE>) { push (@data, $_); last if ( /^--------/ ); }

#	push (@data, "\n\n\n");

    while(<FILE>) { last if (/^-----BEGIN PGP SIGNED MESSAGE-----/); }

    if( !eof(FILE) ) {

	while(<FILE>) { 
	    last if (/^-----BEGIN PGP SIGNATURE-----/);
	    push (@data , $_); 
	}

	seek(FILE, 0, 0);
	truncate(FILE, 0);

	print FILE @data;

    }
    close(FILE);
	
    return;
}



sub runeditor {
    local($file) = @_;
    local($pid);

FORK: {
	if ($pid = fork) {
		wait;
	} elsif (defined $pid) { # $pid is zero here if defined
		exec "$editor $file";
	} elsif ($! =~ /No more process/) {     
		# EAGAIN, supposedly recoverable fork error
		sleep 5;
		redo FORK;
	} else {
		# weird fork error
		die "Can't fork: $!\n";
	}
}
    return;
}

-----BEGIN PGP SIGNATURE-----
Version: 2.1

iQBFAgUBK20WHMhmn7GUWLLFAQFBawF6AuCjRKbZQcAM1NFXwrYO1MLmTvPcV7FC
loRe/LqIoNwMST9sKfDFNSBoKmvCEaaB
=Cjuz
-----END PGP SIGNATURE-----