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#!/bin/sh
MODULES="dahdi"
DAHDI_MODULES_FILE="/etc/dahdi/modules"
usage() {
cat <<EOF
$0: loads / unloads DAHDI kernel modules
Usage: $0 <load|unload>
* load: Loads all modules listed in /etc/dahdi/modules (one per line)
* unload: Unloads the DAHDI modules (all the modules that are dependencies
of $MODULES).
EOF
}
# recursively unload a module and its dependencies, if possible.
# where's modprobe -r when you need it?
# inputs: module to unload.
# returns: the result from
unload_module() {
module="$1"
line=`lsmod 2>/dev/null | grep "^$1 "`
if [ "$line" = '' ]; then return; fi # module was not loaded
set -- $line
# $1: the original module, $2: size, $3: refcount, $4: deps list
mods=`echo $4 | tr , ' '`
ec_modules=""
# xpp_usb keeps the xpds below busy if an xpp hardware is
# connected. Hence must be removed before them:
case "$module" in xpd_*) mods="xpp_usb $mods";; esac
for mod in $mods; do
case "$mod" in
dahdi_echocan_*)
ec_modules="$mod $ec_modules"
;;
*)
# run in a subshell, so it won't step over our vars:
(unload_module $mod)
;;
esac
done
# Now that all the other dependencies are unloaded, we can unload the
# dahdi_echocan modules. The drivers that register spans may keep
# references on the echocan modules before they are unloaded.
for mod in $ec_modules; do
(unload_module $mod)
done
rmmod $module
}
unload_modules() {
for module in "$@"; do
unload_module $module
done
}
load_modules() {
modules=`sed -e 's/#.*$//' $DAHDI_MODULES_FILE 2>/dev/null`
for line in $modules; do
modprobe $line
done
}
case "$1" in
load) load_modules "$@";;
unload) unload_modules $MODULES;;
*) usage;;
esac
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