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#! /bin/sh
#
# /usr/sbin/dahdi_span_assignments:
#
# this script can be used both from udev and
# from the command line to assign/unassign and list
# current span assignments.
#
# It uses a configuration file: $DAHDICONFDIR/assigned-spans.conf
# (default DAHDICONFDIR=/etc/dahdi)
#
# The first argument is an action:
# "auto" - trigger driver auto_assign attribute for given devices
# (no configuration file is used)
# "add" - assign (spans which are not already assigned), according
# to /etc/dahdi/assigned-spans.conf configuration file
# "remove" - unassign spans which are not already unassigned
# "list" - human-readable list of all spans (with/without assignments)
# "dumpconfig" - dump current assignments in a /etc/dahdi/assigned-spans.conf
# compatible format
#
# Without further arguments, it operates on all existing spans
# With one or more sysfs dahdi_devices it is limited to those.
#
# We may use alternative "keys" for device matching:
# * Available keys:
# - "hwid" - Hardware id attribute from sysfs
# - "@location" - Location attribute from sysfs (embeded inside '<>')
# - "/devpath" - The sysfs absolute devpath
#
# * During "dumpconfig", for each device we take the first available key:
# - The preference is: "hwid" or else "@location" or else "/devpath"
# - This can be overriden via the SPAN_ASSIGNMENTS_KEY environment variable
# or the '{-k|--key} key' command line option.
#
# * During "add":
# - Any key match is valid (hwid/location/devpath)
# - Shell globs (wildcards: '*', '?', '[...]') may be optionally used.
#
# Command line options:
# - The '-h|--help' show a usage message.
# - The '-n|--dry-run' affects the "add" and "remove" operations.
# - The '-v|--verbose' currently shows device matches during "add" operation.
# - The '-k <key>|--key <key>' overrides the SPAN_ASSIGNMENTS_KEY environment
# variable.
#
# Examples:
# dahdi_span_assignments list
# dahdi_span_assignments add # all unassigned devices
# dahdi_span_assignments add /sys/bus/dahdi_devices/devices/astribanks:xbus-00
# dahdi_span_assignments remove # all assigned devices
# dahdi_span_assignments -k location dumpconfig
#
devbase='/sys/bus/dahdi_devices/devices'
DAHDICONFDIR="${DAHDICONFDIR:-/etc/dahdi}"
DAHDISASSIGNEDSPANSCONF="${DAHDIASSIGNEDSPANSCONF:-"${DAHDICONFDIR}/assigned-spans.conf"}"
SPAN_ASSIGNMENTS_KEY=${SPAN_ASSIGNMENTS_KEY:-hwid}
dry_run=
verbose=
usage() {
echo >&2 "Usage: $0 [options] action [devpath ...]"
echo >&2 " action:"
echo >&2 " auto - trigger driver auto_assign attribute for given devices"
echo >&2 " add - assign spans, according to /etc/dahdi/assigned-spans.conf"
echo >&2 " remove - unassign spans"
echo >&2 " list - human-readable list of all spans"
echo >&2 " dumpconfig - dump current state as new configuration"
echo >&2 ""
echo >&2 " options:"
echo >&2 " -h|--help - Show this help"
echo >&2 " -n|--dry-run - For 'add/remove' actions"
echo >&2 " -v|--versbose - Show matches during 'add' action"
echo >&2 " -k|--key <k> - Override prefered key during dumpconfig action"
exit 1
}
# Parse command line options
TEMP=`getopt -o hnvk: --long help,dry-run,verbose,key: -n "$0" -- "$@"`
if [ $? != 0 ]; then
echo >&2 "Bad options"
usage
fi
# Note the quotes around `$TEMP': they are essential!
eval set -- "$TEMP"
while true ; do
case "$1" in
-h|--help)
usage
;;
-n|--dry-run)
dry_run='true'
shift
;;
-v|--verbose)
verbose='true'
shift
;;
-k|--key)
SPAN_ASSIGNMENTS_KEY="$2"
shift
shift
;;
--)
shift
break
;;
*)
echo "Internal error!"
exit 1
;;
esac
done
if [ "$#" -eq 0 ]; then
echo >&2 "Missing action argument"
usage
fi
action="$1"
shift
# Validate SPAN_ASSIGNMENTS_KEY
case "$SPAN_ASSIGNMENTS_KEY" in
hwid|location|devpath)
;;
*)
echo >&2 "Bad SPAN_ASSIGNMENTS_KEY='$SPAN_ASSIGNMENTS_KEY' (should be: hwid|location|devpath)"
usage
;;
esac
if [ ! -d "$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=`ls -d $devbase/* 2>/dev/null`
fi
# Beware of special characters in attributes
attr_clean() {
cat "$1" 2>/dev/null | tr -d '\n' | tr '!' '/' | tr -c 'a-zA-Z0-9/:.-' '_'
}
show_devices() {
for device in $DEVICES
do
devpath=`cd "$device" && pwd -P`
location='@'`attr_clean "$device/location"`
hardware_id=`attr_clean "$device/hardware_id"`
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/$span/basechan"`
else
spanno='-'
basechan='-'
fi
printf "%-8s %-14s %s %s\n" "$local_spanno:$spanno:$basechan" "[$hardware_id]" "$location" "$devpath"
done | sort -n
done
}
dump_config() {
echo '#'
echo "# Autogenerated by $0 on `date`"
echo "# Map devices + local spans to span + base channel number"
echo ''
for device in $DEVICES
do
devpath=`cd "$device" && pwd -P`
location=`attr_clean "$device/location"`
hardware_id=`attr_clean "$device/hardware_id"`
if [ "$SPAN_ASSIGNMENTS_KEY" = 'hwid' -a "$hardware_id" != '' ]; then
id="$hardware_id"
elif [ "$SPAN_ASSIGNMENTS_KEY" = 'location' -a "$location" != '' ]; then
id="@$location"
else
id="$devpath"
fi
echo "# Device: [$hardware_id] @$location $devpath"
for local_spanno in `cut -d: -f1 "$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/$span/basechan"`
printf "%-30s %s\n" "$id" "$local_spanno:$spanno:$basechan"
else
echo "# Skipped unassigned local span $local_spanno"
fi
done | sort
echo ''
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 "$spandir/local_spanno"`
if [ "$dry_run" = true ]; then
echo "(dry-run) unassign $device $local_spanno"
continue
fi
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' "$DAHDISASSIGNEDSPANSCONF"
}
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-$spanno"
if [ "$dry_run" = true ]; then
echo "(dry-run) assign $device: $s"
continue
fi
if [ -d "$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 span $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="$1"
devpath=`cd "$device" && pwd -P`
location='@'`attr_clean "$device/location"`
hardware_id=`attr_clean "$device/hardware_id"`
filter_conf | while read id spanspecs
do
# We use case to enable shell-style globbing in configuration
case "$hardware_id" in
$id)
[ "$verbose" = true ] && echo "match by hwid ($id ~ $hardware_id): $spanspecs"
assign_device_spans "$device"
;;
esac
# We use case to enable shell-style globbing in configuration
case "$location" in
$id)
[ "$verbose" = true ] && echo "match by location ($id ~ $location): $spanspecs"
assign_device_spans "$device"
;;
esac
# We use case to enable shell-style globbing in configuration
case "$devpath" in
$id)
[ "$verbose" = true ] && echo "match by devpath ($id ~ $devpath): $spanspecs"
assign_device_spans "$device"
;;
esac
done
}
assign_devices() {
if [ ! -f "$DAHDISASSIGNEDSPANSCONF" ]; then
echo >&2 "$0: Missing '$DAHDISASSIGNEDSPANSCONF'"
exit 1
fi
echo "using '$DAHDISASSIGNEDSPANSCONF'"
for device in $DEVICES
do
match_device "$device"
done
}
auto_assign_devices() {
for device in $DEVICES
do
echo "auto-assign $device"
if [ "$dry_run" != true ]; then
echo 1 > "$device/auto_assign"
fi
done
}
case "$action" in
auto)
auto_assign_devices
;;
add)
assign_devices
;;
remove)
unassign_all_spans
;;
list)
show_devices
;;
dumpconfig)
dump_config
;;
*)
echo >&2 "Bad action='$action'"
usage
;;
esac