etc/rc.d/motd

   1 #!/bin/sh
   2 #
   3 # $NetBSD: motd,v 1.5 2000/09/19 13:04:38 lukem Exp $
   4 # $FreeBSD: src/etc/rc.d/motd,v 1.6 2003/06/30 22:06:26 mtm Exp $
   5 #
   6
   7 # PROVIDE: motd
   8 # REQUIRE: mountcritremote
   9 # BEFORE:  LOGIN
  10
  11 . /etc/rc.subr
  12
  13 name="motd"
  14 rcvar="update_motd"
  15 start_cmd="motd_start"
  16 stop_cmd=":"
  17
  18 motd_start()
  19 {
  20         #       Update kernel info in /etc/motd
  21         #       Must be done *before* interactive logins are possible
  22         #       to prevent possible race conditions.
  23         #
  24         local target="/etc/motd"
  25         local old new exp temp
  26
  27         echo "Updating motd."
  28         if [ ! -f "${target}" ]; then
  29                 install -o root -g wheel -m 0644 /dev/null ${target}
  30         fi
  31
  32         old=$(awk '
  33         NR == 1 {
  34                 if ($1 == "DragonFly") { print } else { exit 1 }
  35         }' < ${target})
  36         if [ $? -ne 0 ]; then
  37                 return  # custom motd
  38         fi
  39
  40         exp='s@([^#]*) #(.* [1-2][0-9]{3}).*/([^/ ]+) *$@\1 (\3) #\2@'
  41         new=$(uname -v | sed -E -e "${exp}")
  42         if [ "${old}" != "${new}" ]; then
  43                 temp=$(mktemp -t motd)
  44                 printf '%s\n' "${new}" > ${temp}
  45                 tail -n +2 ${target} >> ${temp}
  46                 cat ${temp} > ${target}
  47                 rm -f ${temp}
  48         fi
  49 }
  50
  51 load_rc_config $name
  52 run_rc_command "$1"