benchmark-reverse.bash

#!/bin/bash -eu

# Benchmark gocryptfs' reverse mode

cd "$(dirname "$0")"
MYNAME=$(basename "$0")
source tests/fuse-unmount.bash

# Download /tmp/linux-3.0.tar.gz
./tests/dl-linux-tarball.bash

cd /tmp
PLAIN=linux-3.0

SIZE=0
if [[ -d $PLAIN ]]; then
	SIZE=$(du -s --apparent-size "$PLAIN" | cut -f1)
fi


if [[ $SIZE -ne 412334 ]] ; then
	echo "Extracting linux-3.0.tar.gz"
	rm -Rf "$PLAIN"
	tar xf linux-3.0.tar.gz
fi

rm -f "$PLAIN/.gocryptfs.reverse.conf"
gocryptfs -q -init -reverse -extpass="echo test" -scryptn=10 "$PLAIN"

MNT=$(mktemp -d /tmp/linux-3.0.reverse.mnt.XXX)

# Cleanup trap
trap 'rm -f "$PLAIN/.gocryptfs.reverse.conf" ; fuse-unmount -z "$MNT" ; rmdir "$MNT"' EXIT

# Mount
gocryptfs -q -reverse -extpass="echo test" "$PLAIN" "$MNT"

# Execute command, discard all stdout output, print elapsed time
# (to stderr, unfortunately).
etime() {
	# Make the bash builtin "time" print out only the elapse wall clock
	# seconds
	TIMEFORMAT=%R
	time "$@" > /dev/null
}

echo -n "LS:  "
etime ls -lR "$MNT"
echo -n "CAT: "
etime find "$MNT" -type f -exec cat {} +