dahdi-tools/span_assignments

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#! /bin/sh
#
# /usr/share/dahdi/span_assignments:
#
# this script can be used both from udev and
# from the command line to assign/unassign and list
# current assignments.
#
# The first argument is an action:
# "add" to assign (spans which are not already assigned)
# "remove" to unassign (spans which are not already unassigned)
# "list" to show all spans (with/without assignments)
#
# Without further arguments, it operates on all existing spans
# With one or more sysfs dahdi_devices it is limited to those.
#
# Examples:
# span_assignments list
# span_assignments add # all
# span_assignments add /sys/bus/dahdi_devices/devices/astribanks:xbus-00
# span_assignments remove # all
#
devbase='/sys/bus/dahdi_devices/devices'
DAHDICONFDIR="${DAHDICONFDIR:-/etc/dahdi}"
pinned_spans_conf="$DAHDICONFDIR/pinned-spans.conf"
usage() {
echo >&2 "Usage: $0 {add|remove|list} [devpath ...]"
exit 1
}
if [ "$#" -eq 0 ]; then
usage
fi
action="$1"
shift
if [ ! -d "$devbase" ]; then
echo >&2 "$0: Missing '$devbase' (DAHDI driver unloaded?)"
exit 1
fi
# Use given devices or otherwise, all existing devices
if [ "$#" -gt 0 ]; then
DEVICES="$@"
else
DEVICES=`echo $devbase/*`
fi
show_devices() {
for device in $DEVICES
do
hw_id=`cat "$device/hardware_id"`
location=`cd "$device" && pwd -P | sed 's,/sys/devices/,,'`
for local_spanno in `cut -d: -f1 "$device/spantype"`
do
span=`grep 2>/dev/null -Hw "$local_spanno" "$device/span-"*"/local_spanno" | \
sed -e 's,/local_spanno:.*,,' -e 's,.*/,,'`
if [ "$span" != '' ]; then
spanno=`echo $span | sed 's/^.*-//'`
name=`cat 2>/dev/null "$device/$span/name"`
basechan=`cat 2>/dev/null "$device/$span/basechan"`
else
spanno='-'
basechan='-'
fi
printf "%-4s %-12s %s\n" "$local_spanno:$spanno:$basechan" "[$hw_id]" "@$location"
done | sort -n
done
}
dump_config() {
for device in $DEVICES
do
hw_id=`cat "$device/hardware_id"`
location=`cd "$device" && pwd -P | sed 's,/sys/devices/,,'`
if [ "$hw_id" != '' ]; then
id="$hw_id"
else
id="@$location"
fi
for local_spanno in `cut -d: -f1 "$device/spantype"`
do
span=`grep 2>/dev/null -Hw "$local_spanno" "$device/span-"*"/local_spanno" | \
sed -e 's,/local_spanno:.*,,' -e 's,.*/,,'`
if [ "$span" != '' ]; then
spanno=`echo $span | sed 's/^.*-//'`
name=`cat 2>/dev/null "$device/$span/name"`
basechan=`cat 2>/dev/null "$device/$span/basechan"`
else
spanno='-'
fi
printf "%-30s %s\n" "$id" "$local_spanno:$spanno:$basechan"
done | sort -n
done
}
unassign_all_spans() {
for device in $DEVICES
do
find "$device" -follow -maxdepth 1 -name 'span-*' -type d | \
sort | while read spandir; do
local_spanno=`cat "$spandir/local_spanno"`
echo "unassign $device $local_spanno"
if ! echo "$local_spanno" > "$device/unassign_span"; then
echo >&2 "$0: failed unassigning '$local_spanno' in '$device'"
fi
done
done
}
# Allow comments and empty lines in config file
filter_conf() {
sed -e 's/#.*//' -e '/^[ \t]*$/d' "$pinned_spans_conf"
}
# Beware of special characters in attributes
attr_clean() {
cat "$1" | tr -d '\n' | tr '!' '/' | tr -c 'a-zA-Z0-9/:.-' '_'
}
assign_device_spans() {
device="$1"
for s in $spanspecs
do
local_spanno=`echo "$s" | cut -d: -f1`
spanno=`echo "$s" | cut -d: -f2`
span="$device/span-$spanno"
if [ -d "$span" ]; then
span_local_spanno=`cat "$span/local_spanno"`
if [ "$span_local_spanno" != "$local_spanno" ]; then
echo "WARNING: $span_local_spanno != $local_spanno"
fi
echo "$device [$local_spanno] already assigned to $spanno. Skipping..."
continue
fi
echo "assign $device: $s"
if ! echo "$s" > "$device/assign_span"; then
echo >&2 "$0: failed assigning '$s' to '$device'"
fi
done
}
match_device() {
device="$1"
location='@'`cd "$device" && pwd -P | sed 's,/sys/devices/,,'`
hardware_id=`attr_clean "$device/hardware_id"`
filter_conf | while read id spanspecs
do
# We use case to enable shell-style globbing in configuration
case "$location" in
$id)
#echo "match location($id ~ $location): $spanspecs"
assign_device_spans "$device"
;;
esac
# We use case to enable shell-style globbing in configuration
case "$hardware_id" in
$id)
#echo "match hardware_id([$id] ~ $hardware_id): $spanspecs"
assign_device_spans "$device"
;;
esac
done
}
assign_devices() {
for device in $DEVICES
do
match_device "$device"
done
}
case "$action" in
list)
show_devices
;;
dump)
dump_config
;;
add)
assign_devices
;;
remove)
unassign_all_spans
;;
*)
usage
;;
esac