From 9f640573906bf7f98133006d09cb2bddca5ec5ae Mon Sep 17 00:00:00 2001
From: "Jason A. Donenfeld" <Jason@zx2c4.com>
Date: Wed, 12 Sep 2012 21:08:56 +0200
Subject: [PATCH] Use ramdisk for volatile storage in OSX.

---
 src/password-store.sh | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/src/password-store.sh b/src/password-store.sh
index c736d7b..33a0e97 100755
--- a/src/password-store.sh
+++ b/src/password-store.sh
@@ -239,6 +239,19 @@ case "$command" in
 
 		if [[ -d /dev/shm && -w /dev/shm && -x /dev/shm ]]; then
 			tmp_dir="$(TMPDIR=/dev/shm mktemp -t $template -d)"
+		elif [[ $(uname) = "Darwin" ]]; then
+			cleanup_tmp() {
+				[[ -d $tmp_dir ]] || return
+				rm -rf "$tmp_file" "$tmp_dir" 2>/dev/null
+				umount "$tmp_dir"
+				diskutil quiet eject "$ramdisk_dev"
+				rmdir "$tmp_dir"
+			}
+			trap cleanup_tmp INT TERM EXIT
+			tmp_dir="$(mktemp -t $template -d)"
+			ramdisk_dev="$(hdid -drivekey system-image=yes -nomount 'ram://32768' | cut -d ' ' -f 1)" # 32768 sectors = 16 mb
+			newfs_hfs -M 700 "$ramdisk_dev" &>/dev/null || exit 1
+			mount -t hfs -o noatime -o nobrowse "$ramdisk_dev" "$tmp_dir" || exit 1
 		else
 			prompt=$(echo    "Your system does not have /dev/shm, which means that it may"
 			         echo    "be difficult to entirely erase the temporary non-encrypted"
-- 
1.7.12