Download and validate OpenBSD snapshot then install /bsd.rd

slapshot.sh

#!/bin/sh
path=snapshots
url=ftp://openbsd.cs.toronto.edu/pub/OpenBSD/
rel=`uname -r`
major=`echo $rel | sed 's/\..*//'`
minor=`echo $rel | sed 's/.*\.//'`

mkdir -p $path
cd $path

ftp -ia ${url}/snapshots/`uname -m`/{man*tgz,comp*tgz,base*tgz,bsd*,INS*,SHA*} || exit 1

signify -q -C -p /etc/signify/openbsd-${major}${minor}-base.pub -x SHA256.sig *tgz bsd* INS*
if [ $? -eq 0 ]; then
  doas cp bsd.rd /
  echo "Success: bsd.rd installed ($major.$minor)"
else
  let minor=$minor+1
  signify -q -C -p /etc/signify/openbsd-${major}${minor}-base.pub -x SHA256.sig *tgz bsd* INS*
  if [ $? -eq 0 ]; then
    doas cp bsd.rd /
    echo "Success: bsd.rd installed ($major.$minor)"
  else
    echo signify failed
  fi
fi