scripts/runqemu-ifup: Fix 10 or more tap devices

The use of sort means that tap10 and tap1 don't sort correctly. Tweak
the shell expression to correctly handle numbers of tap devices of 10
or more.

Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>

diff --git a/scripts/runqemu-ifup b/scripts/runqemu-ifup
index e3aa16c97df42e996367ba5b9142e9b297b6db76..5dc765dee826b73f47eea9772d64a11af9f54d18 100755 (executable)
--- a/scripts/runqemu-ifup
+++ b/scripts/runqemu-ifup
@@ -38,7 +38,7 @@ USERID="-u $1"
 GROUP="-g $2"
 
 if taps=$(ip tuntap list 2>/dev/null); then
-       tap_no=$(( $(echo "$taps" |sort -r |sed 's/^tap//; s/:.*//; q') + 1 ))
+       tap_no=$(( $(echo "$taps" |cut -f 1 -d ":" | sed 's/tap//g' | sort -rn | head -n 1) + 1 ))
        ip tuntap add tap$tap_no mode tap group $2 && TAP=tap$tap_no
 fi