OS X ramdisk script

README

This file creates and mounts a ramdisk on OS X (10.5+, I believe)

Handy for setting up test environments.  I use it for git like so:

device=`ramdisk 250 Git_Test`
export GIT_TEST_OPTS='--root=/Volumes/Git_Test'
make test
hdiutil detach $device

ramdisk.sh

#!/bin/sh

program=`basename $0`

if [ $# -lt 1 -o $# -gt 2 ]; then
	echo $? $#
	echo "Usage: $program <size in MiB> [<disk name>]"
	exit 1
fi

size=$1
name=$2
[ "$name" ] || name=ramdisk

if [ -e "/Volumnes/$name" ]; then
	echo "Disk named \"$name\" already mounted."
	exit -1
fi

size=$(($size * 2048))
device=`hdiutil attach -nomount ram://$size`
status=$?
if [ $status != 0 ]; then
	echo -n "$device"
	exit $status
fi
device=`echo "$device" | tr -d '\n\t '`

diskutil=`diskutil erasevolume HFS+ "$name" "$device"`
status=$?
if [ $status != 0 ]; then
	echo -n "$diskutil"
	exit $status
fi

if ! [ -d "/Volumes/$name" ]; then
	echo "Warning: \"/Volumes/$name\" not found. Ramdisk $device not mounted?" >&2
fi

echo $device