#!/sbin/sh
#
# CDDL HEADER START
#
# The contents of this file are subject to the terms of the
# Common Development and Distribution License (the "License").
# You may not use this file except in compliance with the License.
#
# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
# or http://www.opensolaris.org/os/licensing.
# See the License for the specific language governing permissions
# and limitations under the License.
#
# When distributing Covered Code, include this CDDL HEADER in each
# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
# If applicable, add the following below this CDDL HEADER, with the
# fields enclosed by brackets "[]" replaced with your own identifying
# information: Portions Copyright [yyyy] [name of copyright owner]
#
# CDDL HEADER END
#
#
# Copyright 2006 Sun Microsystems, Inc.  All rights reserved.
# Use is subject to license terms.
#
#ident	"@(#)svc-dumpadm	1.4	06/02/22 SMI"

. /lib/svc/share/smf_include.sh

#
# mksavedir
# Make sure that $DUMPADM_SAVDIR is set and exists.
#
mksavedir ()
{
	[ -z "$DUMPADM_SAVDIR" ] && DUMPADM_SAVDIR=/var/crash/`uname -n`
	[ -d "$DUMPADM_SAVDIR" ] || /usr/bin/mkdir -m 0700 -p $DUMPADM_SAVDIR
}

pre_savecore ()
{
	/usr/bin/ls $DUMPADM_SAVDIR > /pre-savecore.$$
}

post_savecore ()
{
	/usr/bin/ls $DUMPADM_SAVDIR > /post-savecore.$$
}

has_dumped ()
{
        HAS_DUMPED=0
        /usr/bin/diff /pre-savecore.$$ /post-savecore.$$ > /dev/null
        if [ $? -ne 0 ]
        then
                HAS_DUMPED=1
        fi
        rm /pre-savecore.$$ /post-savecore.$$
        return $HAS_DUMPED
}

dumpinfo ()
{
	DUMP_NO=`/usr/bin/ls $DUMPADM_SAVDIR | awk -F. '{print $2}' \
		| sort -un | tail -1`
	echo '::status
		$c
		::msgbuf' | mdb $DUMPADM_SAVDIR/*.${DUMP_NO} > /dumpadm-dumpinfo.txt 
}

#
# We haven't run savecore on a dump device yet
#
savedev=none

#
# If we previously crashed early in boot before dumpadm was used to configure
# an alternate dump device, then the dump is in the primary swap partition,
# which was configured as the dump device by the first swapadd early in boot.
# Thus before we run dumpadm to configure the dump device, we first run
# savecore to check the swap partition for a dump.
#
if [ -x /usr/bin/savecore ]; then
	[ -r /etc/dumpadm.conf ] && . /etc/dumpadm.conf

	if [ "x$DUMPADM_ENABLE" != xno ] && mksavedir; then
		pre_savecore
		/usr/bin/savecore $DUMPADM_SAVDIR
		post_savecore

		shift $#
		set -- `/usr/sbin/dumpadm 2>/dev/null | /usr/bin/grep 'device:'`
		savedev=${3:-none}
	fi
else
	echo "WARNING: /usr/bin/savecore is missing or not executable" >& 2
fi

#
# Now run dumpadm to configure the dump device based on the settings
# previously saved by dumpadm.  See dumpadm(1m) for instructions on
# how to modify the dump settings.
#
if [ -x /usr/sbin/dumpadm ]; then
	/usr/sbin/dumpadm -u || $SMF_EXIT_ERR_CONFIG
else
	echo "WARNING: /usr/sbin/dumpadm is missing or not executable" >& 2
	exit $SMF_EXIT_ERR_CONFIG
fi

if [ -r /etc/dumpadm.conf ]; then
	. /etc/dumpadm.conf
else
	echo "WARNING: /etc/dumpadm.conf is missing or unreadable" >& 2
	exit $SMF_EXIT_ERR_CONFIG
fi

#
# Now that dumpadm has reconfigured /dev/dump, we need to run savecore again
# because the dump device may have changed.  If the earlier savecore had
# saved the dump, savecore will just exit immediately.
#
if [ "x$DUMPADM_ENABLE" != xno ]; then
	if /usr/sbin/swap -l 2>/dev/null | grep "^${DUMPADM_DEVICE} " \
	    >/dev/null 2>&1; then
		#
		# If the dump device is part of swap, we only need to run
		# savecore a second time if the device is different from the
		# swap device on which we initially ran savecore.
		#
		pre_savecore
		[ "x$savedev" != "x$DUMPADM_DEVICE" ] && \
		    mksavedir && /usr/bin/savecore $DUMPADM_SAVDIR &
		post_savecore
	else
		#
		# The dump device couldn't have been dedicated before we
		# ran dumpadm, so we must execute savecore again.
		#
		pre_savecore
		mksavedir && /usr/bin/savecore $DUMPADM_SAVDIR &
		post_savecore
	fi
fi

has_dumped
if [ $? -eq 1 ]
then
	dumpinfo
fi

exit $SMF_EXIT_OK