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authorPaul Eggleton <paul.eggleton@linux.intel.com>2014-04-30 13:32:02 +0100
committerRichard Purdie <richard.purdie@linuxfoundation.org>2014-04-30 21:52:32 +0100
commitd20eedb18d62f719feab372d89fad0ca8a695aba (patch)
tree600dd79b7aa574b269009961aedb472d16ed8501
parentabdd8e708d5fd9bc1491fd041bd2072f57d9bec0 (diff)
downloadpoky-d20eedb18d62f719feab372d89fad0ca8a695aba.tar.gz
scripts/contrib/serdevtry: add script to handle transient serial terminals
When running automated tests (or just generally interacting with) boards whose serial console devices are on the board itself and thus disappear when powered down or practically disconnected, such as the BeagleBone white, some terminal programs (e.g. picocom) will exit when the device disappears and need to be restarted after the serial device returns. This script handles this automatically for such terminal programs. (From OE-Core rev: 0537269df779532245eb2954e04fc26b3edfed85) Signed-off-by: Paul Eggleton <paul.eggleton@linux.intel.com> Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
-rwxr-xr-xscripts/contrib/serdevtry60
1 files changed, 60 insertions, 0 deletions
diff --git a/scripts/contrib/serdevtry b/scripts/contrib/serdevtry
new file mode 100755
index 0000000000..74bd7b7161
--- /dev/null
+++ b/scripts/contrib/serdevtry
@@ -0,0 +1,60 @@
1#!/bin/sh
2
3# Copyright (C) 2014 Intel Corporation
4#
5# Released under the MIT license (see COPYING.MIT)
6
7if [ "$1" = "" -o "$1" = "--help" ] ; then
8 echo "Usage: $0 <serial terminal command>"
9 echo
10 echo "Simple script to handle maintaining a terminal for serial devices that"
11 echo "disappear when a device is powered down or reset, such as the USB"
12 echo "serial console on the original BeagleBone (white version)."
13 echo
14 echo "e.g. $0 picocom -b 115200 /dev/ttyUSB0"
15 echo
16 exit
17fi
18
19args="$@"
20DEVICE=""
21while [ "$1" != "" ]; do
22 case "$1" in
23 /dev/*)
24 DEVICE=$1
25 break;;
26 esac
27 shift
28done
29
30if [ "$DEVICE" != "" ] ; then
31 while true; do
32 if [ ! -e $DEVICE ] ; then
33 echo "serdevtry: waiting for $DEVICE to exist..."
34 while [ ! -e $DEVICE ]; do
35 sleep 0.1
36 done
37 fi
38 if [ ! -w $DEVICE ] ; then
39 # Sometimes (presumably because of a race with udev) we get to
40 # the device before its permissions have been set up
41 RETRYNUM=0
42 while [ ! -w $DEVICE ]; do
43 if [ "$RETRYNUM" = "2" ] ; then
44 echo "Device $DEVICE exists but is not writable!"
45 exit 1
46 fi
47 RETRYNUM=$((RETRYNUM+1))
48 sleep 0.1
49 done
50 fi
51 $args
52 if [ -e $DEVICE ] ; then
53 break
54 fi
55 done
56else
57 echo "Unable to determine device node from command: $args"
58 exit 1
59fi
60