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@knugie knugie/mount-tmp.sh forked from Roman2K/mount-tmp.sh
Created Feb 19, 2018

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#!/usr/bin/env bash
size=1024 # MB
mount_point=$HOME/tmp
name=$(basename "$mount_point")
usage() {
echo "usage: $(basename "$0") [mount | umount | remount | check | orphan]" \
"(default: mount)" >&2
}
process_argv() {
[ $# -ge 0 -a $# -le 1 ] || { usage; exit 1; }
case "$1" in
"") cmd_mount ;;
"mount") cmd_mount ;;
"umount") cmd_umount ;;
"remount") cmd_remount ;;
"check") cmd_check ;;
"orphan") cmd_orphan ;;
*) usage ;;
esac
}
cmd_check() {
is_mounted
}
cmd_mount() {
if is_mounted; then
echo "Already mounted at $mount_point" >&2
return 1
fi
sectors=$(( $size * 1024 * 1024 / 512 ))
dev=$(hdiutil attach -nomount ram://$sectors) \
&& newfs_hfs -v "$name" $dev \
&& mount -t hfs -o nobrowse $dev "$mount_point" \
&& echo "Hello, world!" > "$mount_point"/hello_world \
&& echo "Mounted $name ($size MB) at $mount_point"
}
cmd_umount() {
dev=$(df "$mount_point" | tail -1 | awk '{ print $1 }')
[ $dev ] || return 1
umount "$mount_point" && hdiutil detach "$dev"
}
cmd_remount() {
if is_mounted; then cmd_umount else true; fi \
&& cmd_mount
}
cmd_orphan() {
hdiutil info | egrep 'image-path\s+: ram://' -A14 | egrep '^/dev/disk\d+\s*$'
return 0
}
is_mounted() {
mount | grep -q " on $mount_point "
}
process_argv "$@"
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