ref: 6d374cd4e7c94526ea4fa7216f64eab5474956f4
dir: /sys/src/cmd/audio/scream/screamsend/
#!/bin/rc
rfork e
lifc=()
while(~ $1 *.*.*.*){
lifc=($lifc $1)
shift
}
if(! ~ $#* 0){
echo 'Usage: audio/screamsend [interfaceip]...' >[1=2]
exit 'usage'
}
if(~ $#lifc 0) lifc=`{awk '/4u/{print $1}' /net/ipselftab}
exec aux/dial -o^'addmulti '^$lifc udp!239.255.77.77!4010 rc -c 'audio/screamenc < /dev/audio'