Public bug reported:
Binary package hint: mawk
mawk is installed by default on 9.04, and gawk the default on 8.04, so
this code written on 8.04 failed on 9.04 until I notices that awk was a
different version
run this command, then plug in a USB device:
tail -n 0 -f /var/log/messages | awk '/new.*USB device/ {print "Attached";
fflush()} /USB disconnect/ {print "Dettached"; fflush()}'
expected output:
on USB drivice attach, the word "Attached"
on USB device detach, the word "Detached"
with mawk nothing is output. tried 3 different PC's.
with gawk the expected output is received.
Also with mawk, `tail -n 0 -f /var/log/messages | grep "USB device"` does print
the matching lines, so pipes from tail work
and `echo "new high speed USB device" | awk '/new.*USB device/ {print
"Attached"; fflush()} /USB disconnect/ {print "Dettached"; fflush()}'` does
output "Attached", so pipes from echo to awk work.
** Affects: mawk (Ubuntu)
Importance: Undecided
Status: New
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tail piped to awk not processing
https://bugs.launchpad.net/bugs/382602
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