From 770931805d292908a57a3d2c5f9a4fcde888b5a2 Mon Sep 17 00:00:00 2001
From: Mike Frysinger <vapier@gentoo.org>
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 <vapier@gentoo.org>
---
tools/netconsole | 12 +++++++++---
1 file changed, 9 insertions(+), 3 deletions(-)
diff --git a/tools/netconsole b/tools/netconsole
index 09c89816829..6ef2723f584 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
--
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