pl_sshd

   1 #!/bin/bash
   2 #
   3 # Init file for PlanetLab OpenSSH server daemon (copied from standard
   4 # sshd init file, minor modifications made).
   5 #
   6 # chkconfig: 2345 55 25
   7 # description: PlanetLab OpenSSH server daemon
   8 #
   9 # processname: sshd
  10 # config: /etc/ssh/ssh_host_key
  11 # config: /etc/ssh/ssh_host_key.pub
  12 # config: /etc/ssh/ssh_random_seed
  13 # config: /etc/ssh/sshd_config
  14 # pidfile: /var/run/pl_sshd.pid
  15
  16 # source function library
  17 . /etc/rc.d/init.d/functions
  18 #
  19 # pull in sysconfig settings
  20 [ -f /etc/sysconfig/pl_sshd ] && . /etc/sysconfig/pl_sshd
  21
  22 # add the PlanetLab-specific options
  23 KEYDIR=/var/pl_sshd/keys
  24 OPTIONS="-p 806 -o 'AuthorizedKeysFile $KEYDIR/%u/authorized_keys'"
  25 AUTOMOUNT=/usr/sbin/automount
  26 AUTOMAP=/etc/auto.pl_sshd
  27 AUTOPID=
  28
  29 RETVAL=0
  30 prog="pl_sshd"
  31
  32 # Some functions to make the below more readable
  33 SSHD=/usr/sbin/sshd
  34 RSA1_KEY=/var/local/etc/ssh_host_key
  35 RSA_KEY=/var/local/etc/ssh_host_rsa_key
  36 DSA_KEY=/var/local/etc/ssh_host_dsa_key
  37 PID_FILE=/var/run/pl_sshd.pid
  38
  39 do_restart_sanity_check()
  40 {
  41         $SSHD -t
  42         RETVAL=$?
  43         if [ ! "$RETVAL" = 0 ]; then
  44                 failure $"Configuration file or keys are invalid"
  45                 echo
  46         fi
  47 }
  48
  49 check_automount()
  50 {
  51     # get pid for our automount process
  52     AUTOPID=`mount | \
  53         sed -ne "s%^automount(pid\([0-9]*\)) on $KEYDIR type autofs.*%\1%p"`
  54
  55     # check if that process is still alive
  56     { [ -n "$AUTOPID" ] && ps -p $AUTOPID >/dev/null 2>&1; } || return 1
  57
  58     # check if we can actually mount a user dir in the automount dir
  59     [ -d "$KEYDIR/root" ] || return 1
  60 }
  61
  62 start()
  63 {
  64         # make sure the key dir exists and automount is working on it
  65         [ -d "$KEYDIR" ] || mkdir -p $KEYDIR
  66         [ -x "$AUTOMAP" ] ||
  67         { echo "$AUTOMAP not executable"; return 1; }
  68         check_automount || $AUTOMOUNT $KEYDIR program $AUTOMAP
  69
  70         echo -n $"Starting $prog:"
  71         initlog -c "$SSHD $OPTIONS" && success || failure
  72         RETVAL=$?
  73         [ "$RETVAL" = 0 ] && touch /var/lock/subsys/pl_sshd
  74         echo
  75 }
  76
  77 stop()
  78 {
  79         check_automount && kill -USR2 $AUTOPID
  80
  81         #echo -n $"Stopping $prog:"
  82         #killproc $SSHD -TERM
  83         echo 'you need to kill the port 806 sshd(s) manually'
  84         echo 'make sure not to kill the port 22 sshd...'
  85         RETVAL=$?
  86         [ "$RETVAL" = 0 ] && rm -f /var/lock/subsys/pl_sshd
  87         #echo
  88 }
  89
  90 reload()
  91 {
  92         echo -n $"Reloading $prog:"
  93         killproc $SSHD -HUP
  94         RETVAL=$?
  95         echo
  96 }
  97
  98 case "$1" in
  99         start)
 100                 start
 101                 ;;
 102         stop)
 103                 stop
 104                 ;;
 105         restart)
 106                 stop
 107                 start
 108                 ;;
 109         reload)
 110                 reload
 111                 ;;
 112         condrestart)
 113                 if [ -f /var/lock/subsys/pl_sshd ] ; then
 114                         do_restart_sanity_check
 115                         if [ "$RETVAL" = 0 ] ; then
 116                                 stop
 117                                 # avoid race
 118                                 sleep 3
 119                                 start
 120                         fi
 121                 fi
 122                 ;;
 123         status)
 124                 check_automount && echo automount running ||
 125                     echo automount not functioning
 126                 status pl_sshd
 127                 RETVAL=$?
 128                 ;;
 129         *)
 130                 echo $"Usage: $0 {start|stop|restart|reload|condrestart|status}"
 131                 RETVAL=1
 132 esac
 133 exit $RETVAL