improve ejabberdctl, and support different node names (thanks to Zach Calvert)(EJAB-1611)

ejabberdctl.cfg.example

@@ -55,11 +55,10 @@
 #
 # This communication is used by ejabberdctl command line tool,
 # and in a cluster of several ejabberd nodes.
-# Notice that the IP address must be specified in the Erlang syntax.
 #
-# Default: {127,0,0,1}
+# Default: 127.0.0.1
 #
-INET_DIST_INTERFACE={127,0,0,1}
+#INET_DIST_INTERFACE=127.0.0.1
 
 #.
 #' ERL_EPMD_ADDRESS: IP addresses where epmd listens for connections

ejabberdctl.template

@@ -6,18 +6,39 @@ SMP=auto
 ERL_MAX_PORTS=32000
 ERL_PROCESSES=250000
 ERL_MAX_ETS_TABLES=1400
-
+FIREWALL_WINDOW=""
-SCRIPT_DIR=$(cd ${0%/*} && pwd)
+INET_DIST_INTERFACE="127.0.0.1"
+ERLANG_NODE=ejabberd@localhost
 
 # define default environment variables
-NODE=ejabberd
+SCRIPT_DIR=`cd ${0%/*} && pwd`
-HOST=localhost
-ERLANG_NODE=$NODE@$HOST
 ERL={{erl}}
 INSTALLUSER={{installuser}}
 
+# Compatibility in ZSH
+#setopt shwordsplit 2>/dev/null
+
+# check the proper system user is used if defined
+if [ "$INSTALLUSER" != "" ] ; then
+    EXEC_CMD="false"
+    for GID in `id -G`; do
+        if [ $GID -eq 0 ] ; then
+            EXEC_CMD="su $INSTALLUSER -p -c"
+        fi
+    done
+    if [ `id -g` -eq `id -g $INSTALLUSER` ] ; then
+        EXEC_CMD="sh -c"
+    fi
+    if [ "$EXEC_CMD" = "false" ] ; then
+        echo "This command can only be run by root or the user $INSTALLUSER" >&2
+        exit 4
+    fi
+else
+    EXEC_CMD="sh -c"
+fi
+
 # parse command line parameters
-ARGS=
+ARGS=""
 while [ $# -ne 0 ] ; do
     PARAM=$1
     shift
@@ -37,13 +58,15 @@ done
 if [ "$ETCDIR" = "" ] ; then
     ETCDIR={{sysconfdir}}/ejabberd
 fi
-if [ "$EJABBERD_CONFIG_PATH" = "" ] ; then
-    EJABBERD_CONFIG_PATH=$ETCDIR/ejabberd.cfg
-fi
 if [ "$EJABBERDCTL_CONFIG_PATH" = "" ] ; then
     EJABBERDCTL_CONFIG_PATH=$ETCDIR/ejabberdctl.cfg
 fi
-[ -f "$EJABBERDCTL_CONFIG_PATH" ] && . "$EJABBERDCTL_CONFIG_PATH"
+if [ -f "$EJABBERDCTL_CONFIG_PATH" ] ; then
+    . "$EJABBERDCTL_CONFIG_PATH"
+fi
+if [ "$EJABBERD_CONFIG_PATH" = "" ] ; then
+    EJABBERD_CONFIG_PATH=$ETCDIR/ejabberd.cfg
+fi
 if [ "$LOGS_DIR" = "" ] ; then
     LOGS_DIR={{localstatedir}}/log/ejabberd
 fi
@@ -57,39 +80,6 @@ if [ "$ERLANG_NODE_ARG" != "" ] ; then
     ERLANG_NODE=$ERLANG_NODE_ARG
     NODE=${ERLANG_NODE%@*}
 fi
-
-# check the proper system user is used
-ID=`id -g`
-GIDS=`id -G`
-EJID=`id -g $INSTALLUSER`
-EXEC_CMD="false"
-for GID in $GIDS; do
-    if [ $GID -eq 0 ] ; then
-	EXEC_CMD="su ${INSTALLUSER} -p -c"
-    fi
-done
-if [ "$ID" -eq "$EJID" ] ; then
-	EXEC_CMD="sh -c"
-fi
-if [ "$EXEC_CMD" = "false" ] ; then
-	echo "This command can only be run by root or the user $INSTALLUSER" >&2
-	exit 4
-fi
-
-NAME=-name
-[ "$ERLANG_NODE" = "${ERLANG_NODE%.*}" ] && NAME=-sname
-
-KERNEL_OPTS=""
-if [ "$FIREWALL_WINDOW" != "" ] ; then
-    KERNEL_OPTS="${KERNEL_OPTS} -kernel inet_dist_listen_min ${FIREWALL_WINDOW%-*} inet_dist_listen_max ${FIREWALL_WINDOW#*-}"
-fi
-if [ "$INET_DIST_INTERFACE" != "" ] ; then
-    KERNEL_OPTS="${KERNEL_OPTS} -kernel inet_dist_use_interface \"${INET_DIST_INTERFACE}\""
-fi
-
-ERLANG_OPTS="+K $POLL -smp $SMP +P $ERL_PROCESSES $ERL_OPTIONS"
-
-# define additional environment variables
 if [ "{{release}}" != "true" ] ; then
     if [ "$EJABBERDDIR" = "" ] ; then
         EJABBERDDIR={{libdir}}/ejabberd
@@ -110,7 +100,6 @@ if [ "{{release}}" != "true" ] ; then
         EJABBERD_MSGS_PATH=$EJABBERD_PRIV_PATH/msgs
     fi
 fi
-
 EJABBERD_LOG_PATH=$LOGS_DIR/ejabberd.log
 SASL_LOG_PATH=$LOGS_DIR/erlang.log
 DATETIME=`date "+%Y%m%d-%H%M%S"`
@@ -118,11 +107,25 @@ ERL_CRASH_DUMP=$LOGS_DIR/erl_crash_$DATETIME.dump
 ERL_INETRC=$ETCDIR/inetrc
 HOME=$SPOOLDIR
 
-# create the home dir with the proper user if doesn't exist, because it stores cookie file
+# define erl parameters
-[ -d $HOME ] || $EXEC_CMD "mkdir -p $HOME"
+ERLANG_OPTS="+K $POLL -smp $SMP +P $ERL_PROCESSES $ERL_OPTIONS"
+KERNEL_OPTS=""
+if [ "$FIREWALL_WINDOW" != "" ] ; then
+    KERNEL_OPTS="${KERNEL_OPTS} -kernel inet_dist_listen_min ${FIREWALL_WINDOW%-*} inet_dist_listen_max ${FIREWALL_WINDOW#*-}"
+fi
+if [ "$INET_DIST_INTERFACE" != "" ] ; then
+    KERNEL_OPTS="${KERNEL_OPTS} -kernel inet_dist_use_interface \"{${INET_DIST_INTERFACE//./,}}\""
+fi
+if [ "$ERLANG_NODE" = "${ERLANG_NODE%.*}" ] ; then
+    NAME="-sname"
+else
+    NAME="-name"
+fi
 
-# Change to a directory readable by INSTALLUSER to
+# create the ejabberd home dir with the proper user if doesn't exist
+# then change to that directory readable by INSTALLUSER to
 # prevent "File operation error: eacces." messages
+[ -d $HOME ] || $EXEC_CMD "mkdir -p $HOME"
 cd $HOME
 
 # export global variables
@@ -141,16 +144,10 @@ export ERL_MAX_ETS_TABLES
 export HOME
 export EXEC_CMD
 
-
-# Compatibility in ZSH
-#setopt shwordsplit 2>/dev/null
-
 # start server
 start()
 {
-    checknodenameusage
+    check_start
-    [ "$?" -eq 0 ] && echo "\nERROR: The node '$ERLANG_NODE' is already running." && return 1
-
     $EXEC_CMD "$ERL \
       $NAME $ERLANG_NODE \
       -noinput -detached \
@@ -197,9 +194,7 @@ debug ()
 # start interactive server
 live()
 {
-    checknodenameusage
+    check_start
-    [ "$?" -eq 0 ] && echo "\nERROR: The node '$ERLANG_NODE' is already running." && return 1
-
     echo "--------------------------------------------------------------------"
     echo ""
     echo "IMPORTANT: ejabberd is going to start in LIVE (interactive) mode."
@@ -228,6 +223,13 @@ live ()
       $ERLANG_OPTS $ARGS \"$@\""
 }
 
+etop()
+{
+    $EXEC_CMD "$ERL \
+      $NAME debug-${TTY}-${ERLANG_NODE} \
+      -hidden -s etop -s erlang halt -output text -node $ERLANG_NODE"
+}
+
 help()
 {
     echo ""
@@ -277,7 +279,7 @@ ctl ()
         # conn names -- this allows
         # concurrent invocations using a bound
         # number of atoms
-	for N in $(seq 1 $MAXCONNID); do
+        for N in `seq 1 $MAXCONNID`; do
             CTL_CONN="ejabberdctl-$N"
             CTL_LOCKFILE="$CONNLOCKDIR/$CTL_CONN"
             (
@@ -286,7 +288,7 @@ ctl ()
                     ctlexec $CTL_CONN $COMMAND
                     ssresult=$?
                     # segregate from possible flock exit(1)
-		    ssresult=$(expr $ssresult \* 10)
+                    ssresult=`expr $ssresult \* 10`
                     exit $ssresult
                 else
                     exit 1
@@ -303,7 +305,7 @@ ctl ()
                 break;
             fi
         done
-	result=$(expr $result / 10)
+        result=`expr $result / 10`
     fi
 
     if [ "$badlock" ] ;then
@@ -335,17 +337,30 @@ ctlexec ()
       -s ejabberd_ctl -extra $ERLANG_NODE $COMMAND"
 }
 
-# display ctl usage
-usage ()
-{
-    ctl
-    exit
-}
-
 # stop epmd if there is no other running node
 stop_epmd()
 {
-    epmd -names | grep -q name || epmd -kill
+    epmd -names 2>/dev/null | grep -q name || epmd -kill >/dev/null
+}
+
+# make sure node not already running and node name unregistered
+check_start()
+{
+    epmd -names 2>/dev/null | grep -q " ${ERLANG_NODE%@*} " && {
+        ps ux | grep -v grep | grep -q " $ERLANG_NODE " && {
+            echo "ERROR: The ejabberd node '$ERLANG_NODE' is already running."
+            exit 4
+        } || {
+            ps ux | grep -v grep | grep -q beam && {
+                echo "ERROR: The ejabberd node '$ERLANG_NODE' is registered,"
+                echo "       but no related beam process has been found."
+                echo "Shutdown all other erlang nodes, and call 'epmd -kill'."
+                exit 5
+            } || {
+                epmd -kill >/dev/null
+            }
+        }
+    }
 }
 
 # allow sync calls
@@ -357,7 +372,7 @@ wait_for_status()
     status=4
     while [ $status -ne $1 ] ; do
         sleep $3
-        timeout=$(($timeout - 1))
+        timeout=`expr $timeout - 1`
         [ $timeout -eq 0 ] && {
             status=$1
         } || {
@@ -365,28 +380,16 @@ wait_for_status()
             status=$?
         }
     done
-    [ $timeout -eq 0 ] && {
+    [ $timeout -eq 0 ] && return 1 || return 0
-        status=1
-    } || {
-        status=0
-    }
-    return $status
-}
-
-# check node name is used or not
-# $? --> 0=alreadyused 1=available
-checknodenameusage ()
-{
-    $EXEC_CMD "$ERL \
-      $NAME $ERLANG_NODE \
-	-s erlang halt | grep -c duplicate_name > /dev/null "
 }
 
+# main handler
 case $ARGS in
     ' start') start;;
     ' debug') debug;;
     ' live') live;;
+    ' etop') etop;;
     ' started') wait_for_status 0 30 2;; # wait 30x2s before timeout
-    ' stopped') wait_for_status 3 15 2; stop_epmd;; # wait 15x2s before timeout
+    ' stopped') wait_for_status 3 15 2 && stop_epmd;; # wait 15x2s before timeout
     *) ctl $ARGS;;
 esac