From 9914be9dee28adf70dbfceeb62ec51d23ce096fc Mon Sep 17 00:00:00 2001 From: Mike Frysinger Date: Wed, 9 Sep 2009 12:20:20 -0400 Subject: [PATCH] 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: Mike Frysinger --- tools/netconsole | 12 +++++++++--- 1 file changed, 9 insertions(+), 3 deletions(-) diff --git a/tools/netconsole b/tools/netconsole index 09c8981682..6ef2723f58 100755 --- a/tools/netconsole +++ b/tools/netconsole @@ -31,12 +31,18 @@ if [ -z "${ip}" ] || [ -n "$3" ] ; then fi for nc in netcat nc ; do - type ${nc} >/dev/null && break + type ${nc} >/dev/null 2>&1 && break done trap "stty icanon echo intr ^C" 0 2 3 5 10 13 15 echo "NOTE: the interrupt signal (normally ^C) has been remapped to ^T" stty -icanon -echo intr ^T -${nc} -u -l -p ${port} < /dev/null & -exec ${nc} -u ${ip} ${port} +( +while ${nc} -u -l -p ${port} < /dev/null ; do + : +done +) & +pid=$! +${nc} -u ${ip} ${port} +kill ${pid} 2>/dev/null -- 2.39.5