dahdi-tools/handle_device
Tzafrir Cohen c1e016fa33 Do the Right Thing when there's no config
Do the "right thing" (hopefully. At least for a system with a single
device) if there is are no configuration files:

* No span-types.conf: just ignore it as before. It is optional.
* No pinned-spans.conf: use span_assignments auto (same as having
  dahdi.auto_assign_spans=1).
* No system.conf: generate a temporary one with dahdi_genconf.

This will hopefully allow having a partially-working system, and help
making ut usable with 'span_assignments dumpconfig'. Or maybe just work
as-is.

Signed-off-by: Tzafrir Cohen <tzafrir.cohen@xorcom.com>
2013-10-13 10:18:34 -04:00

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#! /bin/sh
#
# /usr/share/dahdi/handle_device
#
# Called by UDEV when a dahdi device is added/removed
#
me=`basename $0`
dir=`dirname $0`
LOGGER="logger -i -t '$me'"
NAME=`basename "$DEVPATH" | tr -c 'A-Za-z0-9-' '_'`
# Always redirect stderr somewhere, otherwise the shell script will die
# when it tries to do I/O related stuff on closed file descriptor.
# Our default is to throw it down the bit-bucket.
exec 2> /dev/null
# If you wish to trace this script:
#exec 2> "/tmp/${me}.$NAME" 1>&2
#exec 2> /dev/console
# Our directory in the beginning, so we can use local lab setup
PATH="$dir:/usr/sbin:/sbin:/usr/bin:/bin"
set -e
#echo >&2 "$0($ACTION): DEBUG($# args): '$*'"
# Check if we can safely do our job
if [ ! -f /sys/module/dahdi/parameters/auto_assign_spans ]; then
echo "Old driver (no auto_assign_spans parameter). Skip $DEVPATH" | $LOGGER
exit 0
fi
if [ `cat /sys/module/dahdi/parameters/auto_assign_spans` -eq 1 ]; then
echo "auto_assign_spans=1. Skip $DEVPATH" | $LOGGER
exit 0
fi
# Can we pass a different value so we can use
# alternate (testing) configuration?
# Meanwhile, make it hard-coded.
DAHDICONFDIR='/etc/dahdi'
export DAHDICONFDIR
case "$ACTION" in
add)
echo "$ACTION: $DEVPATH" | $LOGGER
# Can have alternate dahdi configuration directory for debugging
# export DAHDICONFDIR="/tmp/xortel/dahdi"
# Don't block udev for too long
(
if [ -r "$DAHDICONFDIR/span-types.conf" ]; then
span_types set "/sys$DEVPATH"
fi
if [ -r "$DAHDICONFDIR/pinned-spans.conf" ]; then
span_assignments add "/sys$DEVPATH"
else
# No configuration. No order guaranteed
span_assignments auto
fi
) 2>&1 < /dev/null | $LOGGER &
;;
remove)
# Nothing to do yet...
echo "$ACTION: $DEVPATH" | $LOGGER
;;
*)
echo "UNHANDLED: $ACTION: $DEVPATH" | $LOGGER
;;
esac