dahdi-linux/xpp/astribank_hook
Tzafrir Cohen f2152481e9 astribank_hook: startup lock and more
* Silently exit right away if user did not set XPP_HOTPLUG_DAHDI.
* Only one Astribank should be allowed to run the startup script:
  - Protect that section with a "lock" (symlinking a file).
  - Sadly we can't rely on /run and may have to wait for a r/w file-system.
  - And thus even this waiting needs to be run in the background
    as to not hold udev.

Signed-off-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>

git-svn-id: http://svn.astersk.org/svn/dahdi/tools/trunk@10068 17933a7a-c749-41c5-a318-cba88f637d49
2011-07-21 13:40:18 +00:00

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#! /bin/sh
me=`basename $0`
dir=`dirname $0`
LOGGER="logger -i -t '$me'"
# Always redirect stderr somewhere, otherwise the shell script will die
# when it tries to do I/O related stuff on closed file descriptor.
# Our default is to throw it down the bit-bucket.
#exec 2> /dev/console
## If you wish to trace this script:
#exec 2> "/tmp/${me}_$XBUS_NAME" 1>&2
# Our directory in the beginning, so we can use local lab setup
PATH="$dir:/usr/sbin:/sbin:/usr/bin:/bin"
set -e
[ -r /etc/dahdi/init.conf ] && . /etc/dahdi/init.conf
# For lab testing
liveconf="$dir/liveconf/dahdi"
if [ -d "$liveconf" ]; then
dahdi_conf="$liveconf"
else
dahdi_conf="/etc/dahdi"
fi
if [ "$XPP_HOTPLUG_DAHDI" != yes ]; then
exit 0
fi
export XPPORDER_CONF="$dahdi_conf/xpp_order"
if [ ! -r "$XPPORDER_CONF" ]; then
(
echo "Skip($ACTION): No '$XPPORDER_CONF'"
echo "Removing uneeded startup semaphore"
astribank_is_starting -v -r 2>&1
) 2>&1 | $LOGGER
exit 0
fi
export DAHDI_CFG_CMD="dahdi_cfg -c $dahdi_conf/system.conf"
export CALLED_FROM_ATRIBANK_HOOK=yes
clean_lines() {
sed -e 's/#.*//' -e 'y/\t/ /' -e 's/^ *//' -e 's/ *$//' -e '$s/$/\n/' "$XPPORDER_CONF"
}
matched_devices() {
ready=`grep -H READY /sys/bus/astribanks/devices/*/xbus_state | sed 's,/xbus_state.*,,'`
for dev in $ready
do
label=`cat "$dev/label"`
connector=`cat "$dev/connector"`
xbus=`echo "$dev" | sed 's,.*/,,'`
lineno=`clean_lines | egrep -n "^${label}$|^@${connector}$" | cut -d: -f1`
if [ "$lineno" != "" ]; then
#echo "$xbus: $XPPORDER_CONF:$lineno -- Match ${label} @${connector}" | $LOGGER
printf "${xbus}\t${label}\n"
else
echo "${xbus}: ${label} @${connector} not found in $XPPORDER_CONF: Ignore($ACTION)" | $LOGGER
fi
done
}
NUM_WANTED=`clean_lines | sed '/^$/d' | wc -l`
NUM_GOOD=`matched_devices | wc -l`
LOCK="/var/lock/twinstar_startup"
start_dahdi() {
script=/etc/init.d/dahdi
echo "Starting $script."
"$script" start | logger -i -t "$script"
status=$?
echo "Status($script): $status"
if [ -x "$dir/twinstar_hook" ]; then
"$dir/twinstar_hook"
fi
# Finished astribanks
echo "Removing semaphore"
astribank_is_starting -v -r
rm -f "$LOCK"
}
#echo "$0: $ACTION($XBUS_NAME)" | $LOGGER
case "$ACTION" in
add)
;;
remove)
;;
online)
echo "$ACTION($XBUS_NAME): $NUM_GOOD/$NUM_WANTED from $XPPORDER_CONF" | $LOGGER
if [ "$NUM_GOOD" -eq "$NUM_WANTED" ]; then
(
# Delay the initialization of the Astribank until the filesystem
# is mounted read-write:
test_file="/var/lock/astribank_test_file"
for i in `seq 1 20`; do
if touch $test_file 2> /dev/null; then
rm -f $test_file
break
else
echo "$0: [$i] - Failed writing '$test_file'...waiting" | $LOGGER
sleep 1;
fi
done
if ln -s "$XBUS_NAME" "$LOCK"; then
echo "START-DAHDI: Total $NUM_GOOD online." | $LOGGER
# Fork services
start_dahdi < /dev/null 2>&1 | $LOGGER
else
echo "$0: Was started: $(ls -l $LOCK)" | $LOGGER
fi
) < /dev/null 2>&1 | $LOGGER &
fi
;;
offline)
echo "$ACTION($XBUS_NAME): $NUM_GOOD/$NUM_WANTED from $XPPORDER_CONF" | $LOGGER
if [ "$NUM_GOOD" -eq 0 ]; then
echo "All Astribanks offline" | $LOGGER
if [ -x "$dir/twinstar_hook" ]; then
"$dir/twinstar_hook" || :
fi
rm -f "$LOCK"
fi
;;
*)
echo "$0: Unknown ACTION='$ACTION'" | $LOGGER
echo "$0: ARGS='$*'" | $LOGGER
echo "$0: ENV:" | $LOGGER
env | $LOGGER
exit 1
esac