#!/bin/sh

ETCSHELLS="${ETCSHELLS:-/etc/shells}"
ETCPASSWD="${ETCPASSWD:-/etc/passwd}"

# script to create devfs filesystems at boot time for scponlyc
# chroot'ed users. We will read ${ETCSHELLS} to determine
# where scponlyc is installed. Then we'll iterate through
# each user in ${ETCPASSWD} to find users whose shell is set to
# scponlyc. For each such user found, we will create a
# minimal devfs under ~/dev.

make_devfs() {
	# $1 is the user name whose home directory needs a minimal
	# devfs created. If ~/dev exists, it will be deleted.

	eval DEV="~$1/dev"
	while /sbin/umount "${DEV}" 2>/dev/null; do :; done
	rm -rf "${DEV}"
	mkdir -p "${DEV}"
	if /sbin/mount_devfs devfs "${DEV}"; then
		/sbin/devfs -m "${DEV}" rule -s 1 applyset && \
		/sbin/devfs -m "${DEV}" rule -s 2 applyset || \
		/sbin/umount "${DEV}" 2>/dev/null
	fi
}


scponlyc_startup() {
	# $1 is the path to the /etc/passwd file

	grep "^[^#]*:.*:.*:.*:.*:.*:${SCPONLYC}$" < "$1" |
		/usr/bin/awk -F: {'print $1'} |
		while read USER; do
			make_devfs "${USER}"
		done
}

SCPONLYC=`/usr/bin/grep "/scponlyc$" ${ETCSHELLS} 2>/dev/null | /usr/bin/tail -1`

if [ "x${SCPONLYC}" = "x" ]; then
	echo scponlyc is not defined in ${ETCSHELLS} >&2
	exit 1
fi

case "$1" in
start)
	scponlyc_startup "${ETCPASSWD}"
	echo -n ' scponlyc'
	;;
*)
	echo "Usage: `basename $0` start" >&2
	;;
esac

exit 0