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authorMike Frysinger <vapier@gentoo.org>2009-09-09 12:20:20 -0400
committerWolfgang Denk <wd@denx.de>2009-09-15 22:54:19 +0200
commit770931805d292908a57a3d2c5f9a4fcde888b5a2 (patch)
treea1cf5a0e36c4a0ae7d75f3ac7d68510791c6547f
parenta6e19d69f63c14b7672c65ca4b014621c6fd0201 (diff)
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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: Mike Frysinger <vapier@gentoo.org>
-rwxr-xr-xtools/netconsole12
1 files changed, 9 insertions, 3 deletions
diff --git a/tools/netconsole b/tools/netconsole
index 09c8981..6ef2723 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