# Bug-Reports: see http://grml.org/bugs/
# License: This file is licensed under the GPL v2.
################################################################################
-# grml-addtun [OPTIONS] <tun0> <tun1> ...
set -e
#set -x
cat <<EOT
Usage: "$PN_" [OPTIONS] <tun0> <tun1> ...
-$PN_ creates persistent tun/tap devices and optionally add them to a bridge
+$PN_ creates persistent tun/tap devices with bridge handling
OPTIONS:
-d delete the given tun devices and remove them from the bridge if given
if [[ $OPT_GROUP_ != '' ]]; then args_="$args_ -u $OPT_GROUP_"; fi
tunctl -t "$1" $args_
if [[ $OPT_BRIDGE_ != '' ]]; then
- brctl showmacs "$OPT_BRIDGE_" &>/dev/null || brctl addbr "$OPT_BRIDGE_"
brctl addif "$OPT_BRIDGE_" "$1"
fi
}
tunctl -d "$1"
}
+function die()
+{
+ echo "$@" >&2
+ exit 1
+}
##
# MAIN
else
fromCmdline "trashTun" "$@"
if [[ $OPT_BRIDGE_ != '' ]]; then
- brctl showmacs "$OPT_BRIDGE_" &>/dev/null && brctl delbr "$OPT_BRIDGE_"
+ tmp_="`brctl showmacs "$OPT_BRIDGE_" |wc -l`"
+ if (( $tmp_ == 1 )); then
+ brctl delbr "$OPT_BRIDGE_"
+ else
+ die "E: bridge $OPT_BRIDGE_ not empty, not removing"
+ fi
fi
fi