#!/bin/sh

# Generate db and cf files if necessary. This used to be handled by

# /etc/mail/Makefile.

teste() {

  if ! test -e "$1"; then

    echo "$1 doesn't exist"

    exit 2

  fi

}

makedb() {

  teste "${1%.db}"

  if [ -z "$SM_FORCE_DBREBUILD" ]; then

    test "${1%.db}" -nt "$1" || return 0

  fi

  if [ "$1" = userdb.db ]; then

    makemap btree "$1" < "${1%.db}"

  else

    makemap hash "$1" < "${1%.db}"

  fi

}

makealiasesdb() {

  uptodate=1

  if [ -z "$SM_FORCE_DBREBUILD" ]; then

    files=$(grep '^O AliasFile=' sendmail.cf |

      while read a; do echo ${a#*=}; done)

    for a in $files; do

      if [ "$a" = /etc/aliases ]; then

        # /etc/aliases.db may be used by other MTA, make sure nothing

        # has touched it since our last newaliases call

        test "$a" -nt "${a}.db" ||

          test aliasesdb-stamp -nt "${a}.db" ||

          test aliasesdb-stamp -ot "${a}.db" || continue

      else

        test "$a" -nt "${a}.db" || continue

      fi

      uptodate=0

      break

    done

  else

    uptodate=0

  fi

  [ $uptodate = 1 ] && return 0

  # check if alternatives is configured to sendmail

  if [ "$(readlink -e /usr/bin/newaliases)" = /usr/sbin/sendmail.sendmail ]

  then

    /usr/bin/newaliases > /dev/null

    touch -r /etc/aliases.db aliasesdb-stamp 2> /dev/null

  else

    rm -f aliasesdb-stamp

  fi

}

makecf() {

  mc=${1%.cf}.mc

  teste "$mc"

  if [ -z "$SM_FORCE_CFREBUILD" ]; then

    test "$mc" -nt "$1" || return 0

  fi

  if test -f /usr/share/sendmail-cf/m4/cf.m4; then

    umask 022

    [ -e "$1" ] && mv -f "$1" "$1".bak

    m4 "$mc" > "$1"

  else

    echo "WARNING: '$mc' is modified. Please install package sendmail-cf to update your configuration."

    exit 15

  fi

}

makeall() {

  # These could be used by sendmail, but are not part of the default install.

  # To use them you will have to generate your own sendmail.cf with

  # FEATURE('whatever')

  test -f bitdomain && makedb bitdomain.db

  test -f uudomain && makedb uudomain.db

  test -f genericstable && makedb genericstable.db

  test -f userdb && makedb userdb.db

  test -f authinfo && makedb authinfo.db

  makedb virtusertable.db

  makedb access.db

  makedb domaintable.db

  makedb mailertable.db

  makecf sendmail.cf

  makecf submit.cf

}

cd /etc/mail || exit 1

[ $# -eq 0 ] && makeall

for target; do

  case "$target" in

    *.db)

      makedb "$target"

      ;;

    *.cf)

      makecf "$target"

      ;;

    all)

      makeall

      ;;

    aliases)

      makealiasesdb

      ;;

    clean)

      rm -f *.db *~ aliasesdb-stamp

      ;;

    start|stop|restart)

      service sendmail "$target"

      ;;

    *)

      echo "Don't know how to make $target"

      exit 2

  esac

done