X-Git-Url: http://git.grml.org/?a=blobdiff_plain;f=sbin%2Fgrml-addtun;h=3b6d5b97b8a8dc8b34eedad44c3f88d89139e5f9;hb=6d0d35b2cdeeb64a1dfba054ab32fc6321edcff5;hp=af1b81014a99069c4c65480f66a21b6739cb7c36;hpb=597f86091bc8db5ed31da8daad9dfe58b6ef23c4;p=grml-network.git

diff --git a/sbin/grml-addtun b/sbin/grml-addtun
index af1b810..3b6d5b9 100755
--- a/sbin/grml-addtun
+++ b/sbin/grml-addtun
@@ -5,28 +5,33 @@
 # 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
 
+PN_="`basename $0`"
 OPT_DEL_='false'
 OPT_USER_=''
 OPT_GROUP_=''
 OPT_BRIDGE_=''
 
-while getopts "du:g:b:h" opt; do
-    case "$opt" in
-        d) OPT_DEL_='true' ;;
-        u) OPT_USER_="$OPTARG" ;;
-        g) OPT_GROUP_="$OPTARG" ;;
-        b) OPT_BRIDGE_="$OPTARG" ;;
-        h) printUsage; exit 0 ;;
-        ?) printUsage; exit 1 ;;
-    esac
-done
-shift $(($OPTIND - 1))
 
+function printUsage()
+{
+    cat <<EOT
+Usage: "$PN_" [OPTIONS] <tun0> <tun1> ...
+
+$PN_ creates persistent tun/tap devices with bridge handling
+
+OPTIONS:
+   -d           delete the given tun devices and remove them from the bridge if given
+   -u <user>    this user should be able to use the tun device
+   -g <group>   this group should be able to use the tun device
+   -b <bridge>  if given, all tun/tap devices are added/removed from the bridge
+                    bridge is created if not allready existent
+   -h           this help
+EOT
+}
 
 function fromCmdline()
 {
@@ -61,10 +66,43 @@ function trashTun()
     tunctl -d "$1"
 }
 
+function die()
+{
+    echo "$@" >&2
+    exit 1
+}
+
+##
+# MAIN
+##
+
+while getopts "du:g:b:h" opt; do
+    case "$opt" in
+        d) OPT_DEL_='true' ;;
+        u) OPT_USER_="$OPTARG" ;;
+        g) OPT_GROUP_="$OPTARG" ;;
+        b) OPT_BRIDGE_="$OPTARG" ;;
+        h) printUsage; exit 0 ;;
+        ?) printUsage; exit 1 ;;
+    esac
+done
+shift $(($OPTIND - 1))
+
 if [[ $OPT_DEL_ == 'false' ]]; then
+    if [[ $OPT_BRIDGE_ != '' ]]; then
+        brctl showmacs "$OPT_BRIDGE_" &>/dev/null || brctl addbr "$OPT_BRIDGE_"
+    fi
     fromCmdline "createTun" "$@"
 else
     fromCmdline "trashTun" "$@"
+    if [[ $OPT_BRIDGE_ != '' ]]; then
+        tmp_="`brctl showmacs "$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
 
 # vim: filetype=sh