give basic commandline help

git-svn-id: svn://svn.openwrt.org/openwrt/trunk/openwrt@1447 3c298f89-4303-0410-b956-a3cf2f4a3e73

package/ppp/files/ifup.pppoe

 #!/bin/sh
+[ $# = 0 ] && { echo "  $0 <group>"; exit; }
 . /etc/functions.sh
-IF_NAME=$1
+type=$1
 
-PROTO=$(nvram get ${IF_NAME}_proto)
-[ "$PROTO" = "pppoe" ] || exit 0
+[ "$(nvram get ${type}_proto)" = "pppoe" ] || {
+	echo "$0: ${type}_proto isn't pppoe"
+	exit
+}
 
 for module in slhc ppp_generic pppox pppoe; do
-	/sbin/insmod $module 2>/dev/null >/dev/null
+	/sbin/insmod $module 2>&- >&-
 done
 
-(
-	while true; do
-		IFNAME=$(nvram get pppoe_ifname)
-		USERNAME=$(nvram get ppp_username)
-		PASSWORD=$(nvram get ppp_passwd)
-		REDIAL=$(nvram get ppp_redialperiod)
-		REDIAL=${REDIAL:+lcp-echo-interval $REDIAL}
-		IDLETIME=$(nvram get ppp_idletime)
-		IDLETIME=${IDLETIME:+lcp-echo-failure $IDLETIME}
-		MTUV=$(nvram get ppp_mtu)
-		MTU=${MTUV:+mtu $MTUV}
-		MRU=${MTUV:+mru $MTUV}
+while :; do
+	IFNAME=$(nvram get pppoe_ifname)
+	USERNAME=$(nvram get ppp_username)
+	PASSWORD=$(nvram get ppp_passwd)
+	REDIAL=$(nvram get ppp_redialperiod)
+	REDIAL=${REDIAL:+lcp-echo-interval $REDIAL}
+	IDLETIME=$(nvram get ppp_idletime)
+	IDLETIME=${IDLETIME:+lcp-echo-failure $IDLETIME}
+	MTU=$(nvram get ppp_mtu)
+	MTU=${MTU:+ mtu $MTU mru $MTU}
 
-		ifconfig $IFNAME up
-		echo -e "plugin rp-pppoe.so\nconnect /bin/true\nusepeerdns\ndefaultroute\nuser \"$USERNAME\"\npassword \"$PASSWORD\"\n$MTU\n$MRU\n$IDLETIME\n$REDIAL" > /tmp/.pppoe-data
-		/usr/sbin/pppd nodetach file /tmp/.pppoe-data $IFNAME
-	done
-) &
+	ifconfig $IFNAME up
+	/usr/sbin/pppd nodetach \
+		plugin rp-pppoe.so \
+		connect /bin/true \
+		usepeerdns \
+		defaultroute \
+		linkname $type \
+		user "$USERNAME" \
+		password "$PASSWORD" \
+		$MTU \
+		$IDLETIME \
+		$REDIAL \
+		$IFNAME
+done &

target/default/target_skeleton/sbin/ifdown

 #!/bin/ash
+[ $# = 0 ] && { echo "  $0 <group>"; exit; }
 . /etc/functions.sh
-  type=$1
-  debug "### ifdown $type ###"
-  if=$(nvram get ${type}_ifname)
-  if_valid $if || return
-  kill $(cat /var/run/${if}.pid 2>&-) 2>&-
-  $DEBUG ifconfig $if down
+type=$1
+debug "### ifdown $type ###"
+if=$(nvram get ${type}_ifname)
+if_valid $if || exit 
+$DEBUG ifconfig $if down
+kill $(cat /var/run/${if}.pid 2>&-) 2>&-

target/default/target_skeleton/sbin/ifup

 #!/bin/ash
+[ $# = 0 ] && { echo "  $0 <group>"; exit; }
 . /etc/functions.sh
 type=$1
 debug "### ifup $type ###"
 
 if=$(nvram get ${type}_ifname)
-if [ "${if%%[0-9]}" = "ppp" ]; then
-  if=$(nvram get pppoe_ifname)
-fi
-
-if_valid $if || return
+[ "${if%%[0-9]}" = "ppp" ] && if=$(nvram get pppoe_ifname)
 
+if_valid $if || exit 
 mac=$(nvram get ${type}_hwaddr)
 $DEBUG ifconfig $if down 2>&-
+
 if [ "${if%%[0-9]}" = "br" ]; then
-  stp=$(nvram get ${type}_stp)
-  $DEBUG brctl delbr $if 2>&-
-  $DEBUG brctl addbr $if
-  $DEBUG brctl setfd $if 0
-  $DEBUG brctl stp $if ${stp:-0}
-  for sif in $(nvram get ${type}_ifnames); do {
-    if_valid $sif || continue
-    ${mac:+$DEBUG ifconfig $sif down hw ether $mac}
-    $DEBUG ifconfig $sif 0.0.0.0 up
-    $DEBUG brctl addif $if $sif
-  } done
+	stp=$(nvram get ${type}_stp)
+	$DEBUG brctl delbr $if 2>&-
+	$DEBUG brctl addbr $if
+	$DEBUG brctl setfd $if 0
+	$DEBUG brctl stp $if ${stp:-0}
+
+	for sif in $(nvram get ${type}_ifnames); do
+		if_valid $sif || continue
+		${mac:+$DEBUG ifconfig $sif down hw ether $mac}
+		$DEBUG ifconfig $sif 0.0.0.0 up
+		$DEBUG brctl addif $if $sif
+	done
 else
-  ${mac:+$DEBUG ifconfig $if down hw ether $mac}
+	${mac:+$DEBUG ifconfig $if down hw ether $mac}
 fi
 
-
 if_proto=$(nvram get ${type}_proto)
 case "$if_proto" in
-  static)
-    ip=$(nvram get ${type}_ipaddr)
-    netmask=$(nvram get ${type}_netmask)
-    gateway=$(nvram get ${type}_gateway)
-
-    $DEBUG ifconfig $if $ip ${netmask:+netmask $netmask} broadcast + up
-    ${gateway:+$DEBUG route add default gw $gateway}
-
-    [ -f /etc/resolv.conf ] && return
-
-    debug "# --- creating /etc/resolv.conf ---"
-    for dns in $(nvram get ${type}_dns); do {
-	echo "nameserver $dns" >> /etc/resolv.conf
-    } done
-  ;;
-  dhcp)
-    ip=$(nvram get ${type}_ipaddr)
-    pidfile=/tmp/dhcp-${type}.pid
-    if [ -f $pidfile ]; then
-      $DEBUG kill $(cat $pidfile)
-    fi
-    ${DEBUG:-eval} "udhcpc -R -i $if ${ip:+-r $ip} -b -p $pidfile &" 
-  ;;
-  none|"")
-  ;;
-  *)
-    [ -x "/sbin/ifup.${if_proto}" ] && { $DEBUG /sbin/ifup.${if_proto} $*; exit; }
-    echo "### ifup $type: ignored ${type}_proto=\"$if_proto\" (not supported)"
-  ;;
+	static)
+		ip=$(nvram get ${type}_ipaddr)
+		netmask=$(nvram get ${type}_netmask)
+		gateway=$(nvram get ${type}_gateway)
+
+		$DEBUG ifconfig $if $ip ${netmask:+netmask $netmask} broadcast + up
+		${gateway:+$DEBUG route add default gw $gateway}
+
+		[ -f /etc/resolv.conf ] && return
+
+		debug "# --- creating /etc/resolv.conf ---"
+		for dns in $(nvram get ${type}_dns); do
+			echo "nameserver $dns" >> /etc/resolv.conf
+		done
+	;;
+	dhcp)
+		ip=$(nvram get ${type}_ipaddr)
+		[ -f $pidfile ] && $DEBUG kill $(cat $pidfile)
+		${DEBUG:-eval} "udhcpc -R -i $if ${ip:+-r $ip} -b -p $pidfile &" 
+	;;
+	none|"")
+	;;
+	*)
+		[ -x "/sbin/ifup.${if_proto}" ] && { $DEBUG /sbin/ifup.${if_proto} $*; exit; }
+		echo "### ifup $type: ignored ${type}_proto=\"$if_proto\" (not supported)"
+	;;
 esac