#
#  cron class install script for explorer3
#  $Id: //depot/dev/proactive/explorer3/pkg/i.cron#5 $
#

#if [ "${EXP_CRONTAB_RUN}" = "yes" -a -z "${PKG_INSTALL_ROOT}" ]; then
#
# Commented out the previous line because we want this to
# run, but we will modify our behavior based on the
# contents of ${PKG_INSTALL_ROOT}
#

if [ "${EXP_CRONTAB_RUN}" = "yes" ]; then
    # Escape / in EXP_HOME
    PAT=`echo ${EXP_HOME} | sed 's!\/!\\\/!g'`
    HOUR=`echo ${EXP_CRONTAB_HOUR} | sed 's!\/!\\\/!g'`
    MIN=`echo ${EXP_CRONTAB_MINUTE} | sed 's!\/!\\\/!g'`
    DAY=`echo ${EXP_CRONTAB_DAY} | sed 's!\/!\\\/!g'`

    while read src dest
    do

	# If ${PKG_INSTALL_ROOT} is empty, then we can
	# assume that we are not jumpstarting (IE root is
	# not on /a and cron is actually running)

        if [ -z "${PKG_INSTALL_ROOT}" ]; then
		# Remove old instances
		crontab -l | sed -e "/.*#${PKGINST}$/d" > /tmp/$$crontab
	fi

	# Add comment to new instance and expand variables

	# Prefix the file creation with ${PKG_INSTALL_ROOT}
	# so that it's empty, then nothing happens, but
	# it does get written to the /tmp file system.
	# This is probably unnecessary as it shouldn't
	# really matter where the temp file gets written to.
	sed -e "s/\${EXP_CRONTAB_HOUR}/${EXP_CRONTAB_HOUR}/g" \
	    -e "s/\${EXP_CRONTAB_MINUTE}/${EXP_CRONTAB_MINUTE}/g" \
	    -e "s/\${EXP_CRONTAB_DAY}/${EXP_CRONTAB_DAY}/g" \
	    -e "s/\${EXP_HOME}/${PAT}/g" \
	    -e "s/$/ # ${PKGINST}/" \
	    $src >> ${PKG_INSTALL_ROOT}/tmp/$$crontab

	#
	# If ${PKG_INSTALL_ROOT} is empty, then go ahead and use
	# crontab to update this file.
	#
	# If ${PKG_INSTALL_ROOT} contains a value (most likely
	# a mount point where / is currently mounted), then
	# assume that we're just appending to the root crontab
	# entry on a file system that is not an active root
	# file system.  This avoids the need for a postinstall
	# script, and the changes will be picked up the next
	# time the system boots with this root filesystem.

        if [ -z "${PKG_INSTALL_ROOT}" ]; then
		# Update crontab
		crontab /tmp/$$crontab
	else
		cat ${PKG_INSTALL_ROOT}/tmp/$$crontab >> ${PKG_INSTALL_ROOT}/var/spool/cron/crontabs/root
	fi

	# Cleanup
	rm -f ${PKG_INSTALL_ROOT}/tmp/$$crontab
    done
else
    while read src dest
    do
        touch $dest
    done
fi