#!/bin/sh
#
# Generic script to remove PCP after installation from a tarball
#
# exit status
# 0	all OK
# 1	warnings
# 2	errors
#

if [ ! -f /etc/pcp.env ]
then
    # PCP not installed before, do nothing
    #
    exit 0
fi

. /etc/pcp.env

# debugging
#
RM="echo + rm"
RMDIR="echo + rmdir"
WARN="echo Warning:"

# do the work
#
RM=rm
RMDIR=rmdir

for svc in pmproxy pmwebd pmie pcp
do
    [ -f $PCP_RC_DIR/$svc ] && $PCP_RC_DIR/$svc stop
    if which rc-update >/dev/null 2>&1
    then
	rc-update delete $svc
    fi
done

if [ ! -f pcp-*[0-9].tar.gz ]
then
    echo "Error: cannot find tarball matching pcp-*[0-9].tar.gz"
    exit 1
fi

sts=0

tar tf pcp-*[0-9].tar.gz \
| sed -e 's/^\.//' -e 's/^[^/]/\/&/' \
| while read file
do
    if [ -f $file -o -L $file ]
    then
	if $RM $file
	then
	    :
	else
	    sts=2
	fi
    else
	$WARN "file $file is missing"
	[ $sts = 0 ] && sts=1
    fi
done

for conf in \
    $PCP_PMCDCONF_PATH $PCP_PMCDOPTIONS_PATH $PCP_PMCDRCLOCAL_PATH \
    $PCP_PMIECONTROL_PATH $PCP_PMLOGGERCONTROL_PATH \
    $PCP_PMPROXYOPTIONS_PATH $PCP_PMWEBDOPTIONS_PATH
do
    rm -f "$conf.pre" "$conf.dist"
done

_rmdir_if_empty()
{
    if [ "`echo $1/*`" = "$1/*" ]
    then
	if $RMDIR "$1"
	then
	    :
	else
	    sts=2
	fi
    else
	# directory is not empty
	$WARN "directory $1 is not empty, not removed"
	[ $sts = 0 ] && sts=1
    fi
}

# some special case cleanup in $PCP_VAR_DIR for files that
# are known/expected to be created after the installation and
# so not part of the tarball
#
$RM -rf $PCP_VAR_DIR/config/pmda
$RM -rf $PCP_VAR_DIR/pmns
$RM -rf $PCP_VAR_DIR/pmdas/simple
$RM -rf $PCP_VAR_DIR/pmdas/sample
$RM -f $PCP_VAR_DIR/pmdas/*/*.pag $PCP_VAR_DIR/pmdas/*/*.dir $PCP_VAR_DIR/pmdas/*/*.log

# we leave $PCP_LOG_DIR but clean up everything else that is not
# empty ... order is a bit tricky, make sure possible leaf directories
# come before any parent directories
#
for dir in $PCP_BINADM_DIR $PCP_INC_DIR $PCP_MPI_DIRS \
	    $PCP_RUN_DIR $PCP_PMDAS_DIR $PCP_VAR_DIR \
	    $PCP_DOC_DIR $PCP_DEMOS_DIR $PCP_SHARE_DIR
do
    if [ -d "$dir" ]
    then
	find "$dir" -depth -type d \
	| while read subdir
	do
	    _rmdir_if_empty "$subdir"
	done
    fi
done

# TODO
# if $PCP_SYSCONFIG_DIR is not empty (RH sysconfig only?) what to do?

exit $sts