Commit 77093180 authored by Mike Frysinger's avatar Mike Frysinger Committed by Wolfgang Denk
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tools/netconsole: make a bit more robust

The netcat utility likes to exit when it receives an empty packet (as it
thinks this means EOF).  This can easily occur when working with command
line editing as this behavior will be triggered when using backspace.  Or
with tabs and command line completion.  So create two netcat processes -
one to only listen (and put it into a loop), and one to do the sending.
Once the user quits the transmitting netcat, the listening one will be
killed automatically.
Signed-off-by: default avatarMike Frysinger <>
parent a6e19d69
......@@ -31,12 +31,18 @@ if [ -z "${ip}" ] || [ -n "$3" ] ; then
for nc in netcat nc ; do
type ${nc} >/dev/null && break
type ${nc} >/dev/null 2>&1 && break
trap "stty icanon echo intr ^C" 0 2 3 5 10 13 15
echo "NOTE: the interrupt signal (normally ^C) has been remapped to ^T"
stty -icanon -echo intr ^T
${nc} -u -l -p ${port} < /dev/null &
exec ${nc} -u ${ip} ${port}
while ${nc} -u -l -p ${port} < /dev/null ; do
) &
${nc} -u ${ip} ${port}
kill ${pid} 2>/dev/null
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