d20eedb18d
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>
1.5 KiB
Executable File
#!/bin/sh
Copyright (C) 2014 Intel Corporation
Released under the MIT license (see COPYING.MIT)
if [ "$1" = "" -o "$1" = "--help" ] ; then echo "Usage: $0 " echo echo "Simple script to handle maintaining a terminal for serial devices that" echo "disappear when a device is powered down or reset, such as the USB" echo "serial console on the original BeagleBone (white version)." echo echo "e.g. $0 picocom -b 115200 /dev/ttyUSB0" echo exit fi
args="$@" DEVICE="" while [ "$1" != "" ]; do case "$1" in /dev/*) DEVICE=$1 break;; esac shift done
if [ "$DEVICE" != "" ] ; then while true; do if [ ! -e $DEVICE ] ; then echo "serdevtry: waiting for $DEVICE to exist..." while [ ! -e $DEVICE ]; do sleep 0.1 done fi if [ ! -w $DEVICE ] ; then # Sometimes (presumably because of a race with udev) we get to # the device before its permissions have been set up RETRYNUM=0 while [ ! -w $DEVICE ]; do if [ "$RETRYNUM" = "2" ] ; then echo "Device $DEVICE exists but is not writable!" exit 1 fi RETRYNUM=$((RETRYNUM+1)) sleep 0.1 done fi $args if [ -e $DEVICE ] ; then break fi done else echo "Unable to determine device node from command: $args" exit 1 fi