#+
# NAME:
#	mkramdisk
# PURPOSE:
#	Set up ramdisk
# CATEGORY:
# CALLING SEQUENCE:
#	. $COM/mkramdisk
# INPUTS:
#	(ramdisk entry in /etc/fstab)
# OUTPUTS:
#	(env var $ramdisk)
# PROCEDURE:
#	The ramdisk should be set up already at mount point /tmp/ramdisk.
#	This can be done as follows:
#		mkdir /tmp/ramdisk
#		mke2fs /tmp/ramdisk
#	Add the following line to /etc/fstab
#		/dev/ramdisk /tmp/ramdisk ext2 noauto,user 0 0
#
#	The ramdisk is primarily used by the IDL procedure gunzip_file
#	to store temporary unzipped files.
# MODIFICATION HISTORY:
#	JUL-2004, Paul Hick (UCSD/CASS; pphick@ucsd.edu)
#-

if [ -z "$ramdisk" ]; then

	if [ -z "$(mount | grep ramdisk)" ]; then
		mount /tmp/ramdisk 2> /dev/null
		mounted=$?
	else
		mounted=0
	fi

	if [ $mounted == 0 ]; then
		touch /tmp/ramdisk/tmp.tmp 2> /dev/null 
		if [ $? == 0 ]; then
			rm /tmp/ramdisk/tmp.tmp
			ramdisk=/tmp/ramdisk
			export ramdisk
		fi
	fi

fi