/usr/src/openswan-2.6.38/packaging/utils/mkrel is in openswan-modules-dkms 1:2.6.38-1.
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 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 | #!/usr/bin/perl
# mkcand m.nn
# package candidate, leaving it in tmp directory
require($ENV{'HOME'}."/bin/disttools.pl");
&defvars;
&suckvars;
umask(022);
$localdir=$ENV{'HOME'}."/archive";
$tmpdir=$ENV{'BTMP'}."/".$ENV{'USER'}."/snapshots";
$transmit=1;
$snapprefix="";
$tarinfix="";
$date="";
$lastrel=$ENV{'LASTREL'};
sub usage {
    print STDERR "mkrel:\n";
    print STDERR "\t-l          do not transmit\n";
    print STDERR "\t-p name     set release name\n";
    print STDERR "\t-r rel      set release branch\n";
}
while(@ARGV) {
  $_=shift;
  if(/^-l/) {
    $transmit=0;
  } elsif(/^-S/) {
    $symlink=1;
  } elsif(/^-p/) {
    $rel=shift;
    $snapprefix="pre$rel-";
  } elsif(/^-r/) {
    $arg=shift;
    ($lastrel=$arg) =~ y/\./\_/;
    $relopt="-r PRE${lastrel}"
  } else {
    &usage;
    exit;
  }
}
if(!defined($relopt) ||
   !defined($rel)) {
	&usage;
	exit;
}
$dirname="freeswan-".$rel;
$pkgname="freeswan-".$rel;
$tarname=$pkgname.".tar";
$vername=$rel;
&nicesystem("mkdir -p $tmpdir");
print "BUILDING release $rel in $dirname\n";
if($transmit) {
  print "WILL TRANSMIT TO $ENV{'DISTHOST'}\n"
} else {
  print "WILL NOT TRANSMIT\n";
}
$ENV{'PGPPATH'}="/mnt/build/freeswan";
$ENV{'PGPNAME'}="build\@freeswan.org";
&makedisttarfile($tmpdir, $pkgname, $vername, $dirname, $date, $relopt, 1);
print "Please insert release key floppy for signature";
$ans=<STDIN>;
system("mount /mnt/build");
&dopgpsig($pkgname);
system("umount /mnt/build");
if($transmit) {
  print "Now transmitting to XS4all\n";
  print "Starting on: ";
  system("date");
  &upload($pkgname);
  &upsync;
 
  print "Finished on: ";
  system("date");
}
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