Comments and fix small bug

Reduce differences between jib/jng and fix a bug that would prevent
additional interfaces from being created if the first of many already
existed (counter wasn't incremented before calling only continue).

2 files changed, 24 insertions, 18 deletions

diff --git a/share/examples/jails/jib b/share/examples/jails/jib
index 934b5ed..acf64ac 100755
--- a/share/examples/jails/jib
+++ b/share/examples/jails/jib
@@ -286,13 +286,16 @@ jib_addm()
 		!*) iface=${iface#!} no_derive=1 ;;
 		esac
 
-		# 1. Make sure the interface doesn't exist already
-		ifconfig "e${i}a_$name" > /dev/null 2>&1 && continue
+		# Make sure the interface doesn't exist already
+		if ifconfig "e${i}a_$name" > /dev/null 2>&1; then
+			i=$(( $i + 1 ))
+			continue
+		fi
 
-		# 2. Bring the interface up
+		# Bring the interface up
 		ifconfig $iface up || return
 
-		# 3. Make sure the interface has been bridged
+		# Make sure the interface has been bridged
 		if ! ifconfig "$iface$bridge" > /dev/null 2>&1; then
 			new=$( ifconfig bridge create ) || return
 			ifconfig $new addm $iface || return
@@ -300,18 +303,18 @@ jib_addm()
 			ifconfig "$iface$bridge" up || return
 		fi
 
-		# 4. Create a new interface to the bridge
+		# Create a new interface to the bridge
 		new=$( ifconfig epair create ) || return
 		ifconfig "$iface$bridge" addm $new || return
 
-		# 5. Rename the new interface
+		# Rename the new interface
 		ifconfig $new name "e${i}a_$name" || return
 		ifconfig ${new%a}b name "e${i}b_$name" || return
 		ifconfig "e${i}a_$name" up || return
 		ifconfig "e${i}b_$name" up || return
 
 		#
-		# 6. Set the MAC address of the new interface using a sensible
+		# Set the MAC address of the new interface using a sensible
 		# algorithm to prevent conflicts on the network.
 		#
 		eiface_devid_a= eiface_devid_b=
@@ -322,7 +325,7 @@ jib_addm()
 			ifconfig "e${i}b_$name" ether $eiface_devid_b
 		fi > /dev/null 2>&1
 
-		i=$(( $i + 1 )) # on to next e{i}b_name
+		i=$(( $i + 1 ))
 	done # for iface
 }
 
diff --git a/share/examples/jails/jng b/share/examples/jails/jng
index 9b905c6..f9af70c 100755
--- a/share/examples/jails/jng
+++ b/share/examples/jails/jng
@@ -291,18 +291,21 @@ jng_bridge()
 		!*) iface=${iface#!} no_derive=1 ;;
 		esac
 
-		# 0. Make sure the interface doesn't exist already
+		# Make sure the interface doesn't exist already
 		eiface=ng${i}_$name
-		ngctl msg "$eiface:" getifname > /dev/null 2>&1 && continue
+		if ngctl msg "$eiface:" getifname > /dev/null 2>&1; then
+			i=$(( $i + 1 ))
+			continue
+		fi
 
-		# 1. Bring the interface up
+		# Bring the interface up
 		ifconfig $iface up || return
 
-		# 2. Set promiscuous mode and don't overwrite src addr
+		# Set promiscuous mode and don't overwrite src addr
 		ngctl msg $iface: setpromisc 1 || return
 		ngctl msg $iface: setautosrc 0 || return
 
-		# 3. Make sure the interface has been bridged
+		# Make sure the interface has been bridged
 		if ! ngctl info ${iface}bridge: > /dev/null 2>&1; then
 			ngctl mkpeer $iface: bridge lower link0 || return
 			ngctl connect $iface: $iface:lower upper link1 ||
@@ -310,7 +313,7 @@ jng_bridge()
 			ngctl name $iface:lower ${iface}bridge || return
 		fi
 
-		# 3.5. Optionally create a secondary bridge
+		# Optionally create a secondary bridge
 		if [ "$bridge" != "bridge" ] &&
 		   ! ngctl info "$iface$bridge:" > /dev/null 2>&1
 		then
@@ -326,7 +329,7 @@ jng_bridge()
 				return
 		fi
 
-		# 4. Create a new interface to the bridge
+		# Create a new interface to the bridge
 		num=2
 		while ngctl msg "$iface$bridge:" getstats $num > /dev/null 2>&1
 		do
@@ -334,7 +337,7 @@ jng_bridge()
 		done
 		ngctl mkpeer "$iface$bridge:" eiface link$num ether || return
 
-		# 5. Rename the new interface
+		# Rename the new interface
 		while [ ${#eiface} -gt 15 ]; do # OS limitation
 			eiface=${eiface%?}
 		done
@@ -345,7 +348,7 @@ jng_bridge()
 		ifconfig $eiface up || return
 
 		#
-		# 6. Set the MAC address of the new interface using a sensible
+		# Set the MAC address of the new interface using a sensible
 		# algorithm to prevent conflicts on the network.
 		#
 		eiface_devid=
@@ -358,7 +361,7 @@ jng_bridge()
 		[ "$eiface_devid" ] &&
 			ifconfig $eiface ether $eiface_devid > /dev/null 2>&1
 
-		i=$(( $i + 1 )) # on to next ng{i}_name
+		i=$(( $i + 1 ))
 	done # for iface
 }