Commit c3b020a1 authored by Oron Peled's avatar Oron Peled Committed by Tzafrir Cohen

new "dahdi_waitfor_span_assignments" tool

* Allows waiting until all spans are "assigned" or "unassigned"
* Current implementation use a polling loop with sleep
* Future implementation may block on sysfs attribute
  (like waitfor_xpds is blocking on sysfs Astribanks attribute)
Signed-off-by: 's avatarTzafrir Cohen <tzafrir.cohen@xorcom.com>
Acked-by: 's avatarRuss Meyerriecks <rmeyerriecks@digium.com>
parent 7f826a7d
......@@ -112,7 +112,8 @@ ASSIGNED_DATA_SCRIPTS:=\
handle_device.d/10-span-types \
handle_device.d/20-span-assignments
ASSIGNED_UTILS:=dahdi_span_assignments dahdi_span_types
ASSIGNED_UTILS:=dahdi_span_assignments dahdi_span_types \
dahdi_waitfor_span_assignments
ASSIGNED_CONF:=assigned-spans.conf.sample span-types.conf.sample
MAN_PAGES:= \
......
#! /bin/sh
usage() {
echo >&2 "Usage: $0 {assigned|unassigned}"
echo >&2 "# wait until all spans known are assigned/unassigned"
exit 1
}
TIMEOUT=5 # How much time to wait for spans
if [ "$#" -lt 1 ]; then
usage
fi
wanted_event="$1"
shift
case "$wanted_event" in
assigned)
;;
unassigned)
;;
*)
usage
;;
esac
devbase='/sys/bus/dahdi_devices/devices'
spans_of() {
dev="$1"
wc -l < "$dev/spantype"
}
assigned_spans_of() {
dev="$1"
ls -d "$dev/span-"* 2>/dev/null | wc -l
}
waitfor_span_assignments() {
wanted_state="$1"
device_list=`ls -d "$devbase/"* 2> /dev/null`
finished=''
count="$TIMEOUT"
echo -n "Waiting for spans to become $wanted_state: "
while [ "$count" -gt 0 ]; do
finished='yes'
for dev in $device_list
do
spans=`spans_of "$dev"`
assigned_spans=`assigned_spans_of "$dev"`
if [ "$wanted_state" = 'assigned' -a "$assigned_spans" -ne "$spans" ]; then
finished='no'
elif [ "$wanted_state" = 'unassigned' -a "$assigned_spans" -ne 0 ]; then
finished='no'
fi
done
if [ "$finished" = 'yes' ]; then
break
else
sleep 1
echo -n "."
fi
count=`expr "$count" - 1`
done
if [ "$finished" = 'yes' ]; then
echo "done"
else
echo "timeout"
fi
}
waitfor_span_assignments "$wanted_event"
.TH "DAHDI_WAITFOR_SPAN_ASSIGNMENTS" "8" "22 Jan 2014" "" ""
.SH NAME
dahdi_waitfor_span_assignments \- wait for DAHDI spans to get (un)assigned
.SH SYNOPSIS
.B dahdi_span_assignments assigned
.B dahdi_span_assignments unassigned
.SH DESCRIPTION
DAHDI spans get assigned / unassigned asynchronously.
.B dahdi_span_assignments
is a helper script that allows running commands after all the spans have
been assigned or unassigned.
It takes a single command: \fBassigned\fR or \fBunassigned\fR and waits
(up until a timeout of 5 seconds) for all the DAHDI spans in the system
to do so.
Note that if the system has a span that will not get assigned
automatically (e.g.: it's not in assigned\-spans.conf), this program
does not know and will wait until a timeout.
.SH EXAMPLES
modprobe wctdm24xxp
dahdi_waitfor_span_assignments assigned
do_something
dahdi_span_assignments add
dahdi_waitfor_span_assignments assigned
do_something_else
dahdi_span_assignments remove
dahdi_span_assignments unassigned
do_something_completely_different
.SH SEE ALSO
dahdi_span_assignments(8)
.SH AUTHOR
dahdi_waitfor_span_assignments was written by Oron Peled. This manual
page was written by Tzafrir Cohen. Permission is granted to copy,
distribute and/or modify this document under the terms of the GNU
General Public License, Version 2 any later version published by the
Free Software Foundation.
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