#!/bin/bash
#
# Copyright (c) 2003-2004 Linuxant inc.
#
# NOTE: The use and distribution of this software is governed by the terms in
# the file LICENSE, which is included in the package. You must read this and
# agree to these terms before using or distributing this software.
# 
# This script tries to unload all @CNXTTARGET@-related modules present in the system
#

unload_mods()
{
	retcode=0
	killsoundprocs=false

	for mod in @CNXTMODS@; do
		if [ "${mod}" = "dgcusbdcp" ]; then
			killall dgcdcpd 2>/dev/null
		fi

		if ${cnxt_hda_present}; then
			if [ "${mod}" = "hsfhda" ]; then
				# need to rmmod bus controller module first
				if lsmod | grep -q "^snd_hda_intel "; then
					rmmod snd_hda_intel 2>&1 | sed 's/^ERROR:/Warning:/' 1>&2
					if [ ${PIPESTATUS[0]} -ne 0 ]; then
						retcode="`expr ${retcode} + 1`"
						killsoundprocs=true
					fi
				fi
			fi
		fi

		if lsmod | grep -q "^${mod} "; then
			rmmod ${mod} 2>&1 | sed 's/^ERROR:/Warning:/' 1>&2
			if [ ${PIPESTATUS[0]} -ne 0 ]; then
				retcode="`expr ${retcode} + 1`"
			fi
		fi

		if [ "${mod}" = "dgcusbdcp" ]; then
			# need to rmmod cdc_acm module
			acmmod="`lsmod | grep '^cdc_acm ' | sed 's/ .*//' | head -n 1`"
			if [ -n "${acmmod}" ]; then
				rmmod ${acmmod} 2>&1 | sed 's/^ERROR:/Warning:/' 1>&2
			fi
		fi

	done

	if ${cnxt_hda_present}; then
		if lsmod | grep -q "^snd_hda_codec "; then
			rmmod snd_hda_codec 2>&1 | sed 's/^ERROR:/Warning:/' 1>&2
			if [ ${PIPESTATUS[0]} -ne 0 ]; then
				retcode="`expr ${retcode} + 1`"
				killsoundprocs=true
			fi
		fi
	fi

	if [ ${retcode} -eq 0 ]; then
		exit 0
	else
		return ${retcode}
	fi
}

kill_procs()
{
	method=$1
	majors=$2

	perl - << EOF
	my @tokill;

	foreach (glob "/proc/[123456789]*") {
		my \$pid = \$_;
		foreach (glob \$pid . "/fd/*") {
			my \$major = (stat)[6];
			if (defined(\$major)) {
				\$major >>= 8;
				foreach \$match (qw/ ${majors} /) {
					if (\$major == \$match) {
						\$pid =~ s!^/proc/!!;
						push(@tokill, int(\$pid));
					}
				}
			}
		}
	}

	if(@tokill) {
		print "Sending ${method} signal to processes still using the driver:\n";
		system("ps -o pid,user,args -wp" . join(",", map sprintf("%d", \$_), @tokill));
		kill ${method}, @tokill;
	}
EOF

	return 0
}


PATH=/usr/sbin:/sbin:/usr/bin:/bin:/usr/local/sbin:/usr/local/bin
export PATH

if [ "@CNXTDRIVER@" = "hsf" -a ! -e "@CNXTETCDIR@/../.@CNXTTARGET@modem-hda-disable" ] && grep -q '^Vendor Id: 0x14f1' /proc/asound/card[0123456789]*/codec\#[0123456789]* >/dev/null 2>&1; then
	cnxt_hda_present=true
else
	cnxt_hda_present=false
fi

unload_mods

# Normal unload failed, we will have to kill processes to unload
maj="`awk '$2 ~ "ttyS@CNXTSERDEV@" { print $1 }' /proc/devices`"

if ${killsoundprocs}; then
	# We are on a system with a Conexant HDA modem, we will have to kill
	# processes which are using the sound as well
	maj="${maj} `awk '$2 ~ "alsa" { print $1 }' /proc/devices`"
fi

if [ -n "${maj}" -a "${maj}" != " " ]; then
	# Be gentle at first
	kill_procs TERM "${maj}"
	sleep 1
	unload_mods
	sleep 7
	unload_mods
	sleep 7
	unload_mods

	# Last resort...
	kill_procs KILL "${maj}"
	sleep 1
	unload_mods
	sleep 5
	unload_mods
fi

exit 1
