PREIN

/bin/sh

# Make sure that the needed groups exist on the install machine
/usr/sbin/groupadd -g 19 -r -f floppy > /dev/null
/usr/sbin/groupadd -g 20 -r -f console > /dev/null
/usr/sbin/groupadd -g 65 -r -f audio > /dev/null
/usr/sbin/groupadd -g 66 -r -f x10 >/dev/null
/usr/sbin/groupadd -g 67 -r -f radio >/dev/null

POSTIN

/bin/sh

if [ -f /etc/fstab ] ; then
  # add /dev/pts to fstab if fstab exists (install2 does it during install)
  if grep 'devpts' /etc/fstab >/dev/null 2>&1 ; then 
      # correct permissions from broken dev packages
     LC_ALL=C \
      perl -pi -e 's/devpts.*mode=0622/devpts  gid=5,mode=620/' /etc/fstab
  else
    # note that we do not disallow comments; we wish to allow people
    # to comment it out if they so desire.
    if [ $(grep '/proc' /dev/fstab 2>/dev/null | wc -l) -gt 1 ] ; then
      # ugly but robust
      echo '
none                    /dev/pts                devpts  gid=5,mode=620        0 0' \
        >> /etc/fstab || { echo "failed to add devpts filesystem to /etc/fstab" 1>&2 ; exit 1 ; }
    else
      # beautiful in the common case
      TMP=$(mktemp /tmp/fstab.XXXXXX)
      sed '/\/proc/a\
none                    /dev/pts                devpts  gid=5,mode=620        0 0
          ' < /etc/fstab > $TMP && cat $TMP > /etc/fstab || { echo "failed to add devpts filesystem to /etc/fstab" 1>&2 ; exit 1 ; }
      rm -f $TMP
    fi
  fi
fi