cat >/usr/local/bin/comports << EOF
#!/bin/bash
# script to link the non static /dev/ttyUSB[N] ports
# to static /dev/com[N]. configuration will be saved
# to a configuration file which is unique for each
# computer

exec 2>/dev/null
if [ ! "\$USER" = "root" ]; then
  sudo \$0 \$1 \$2 \$3 \$4 \$5 \$6 \$7 \$8 \$9
  exit
fi

product=\$(dmidecode -t 2|grep -i Product)
product=\${product#*: }
product=\$(echo \$product | sed -e 's/[^A-Za-z0-9.]//g' | tr '[a-z]' '[A-Z]')
product=\${product:0:8}
serial=\$(dmidecode -t 2|grep -i Serial)
serial=\${serial#*: }
serial=\$(echo \$serial | sed -e 's/[^A-Za-z0-9]//g' | tr '[a-z]' '[A-Z]')
serial=\${serial:0:8}
comcfg=/etc/comports{\$product.\$serial}.conf

if [ \$1 = "-d" ]; then
  rm -f \$comcfg
fi

if [ \$1 = "-s" ]; then
  rm -f \$comcfg
  find /dev/serial/by-path/*|sort|while read line
  do
    echo \$line >>\$comcfg
  done
fi

rm -f /dev/com*
ln -s /dev/ttyS0 /dev/com1
echo /dev/com1 \-\> /dev/ttyS0
ln -s /dev/ttyS1 /dev/com2
echo /dev/com2 \-\> /dev/ttyS1
port=3
if [ -e \$comcfg ]; then
  cat \$comcfg|while read line
  do
    if [ -e \$line ]; then
      ln -s \$line /dev/com\$port
      echo -n "/dev/com\$port -> /dev/"
      ls -lisa \$line|awk -F '/' '{print \$7}'
    else
      echo "/dev/com\$port -> *** not available ***"
    fi
    let port=port+1
  done
  echo com port configuration from {\$product.\$serial}
else
  find /dev/serial/by-path/*|sort|while read line
  do
    ln -s \$line /dev/com\$port
    echo -n "/dev/com\$port -> /dev/"
    ls -lisa \$line|awk -F '/' '{print \$7}'
    let port=port+1
  done
fi

for line in \$(ls /dev/rfcomm*); do
  ln -s \$line /dev/com\$port
  echo /dev/com\$port \-\> \$line
  let port=port+1
done

if [ \$1 = "-s" ]; then
  echo "new com port configuration has been saved"
fi

if [ \$1 = "-d" ]; then
  echo "com port configuration for this computer has been deleted"
fi
EOF