Added contrib/gocryptfssh

contrib/gocryptfssh

@@ -0,0 +1,86 @@
+#!/bin/sh
+
+# This script mounts an gocryptfs filesystem, starts a shell in the mounted
+# directory, and then unmounts the filesystem when the shell exits. This is an
+# equivalent of the encfssh script by by David Rosenstrauch.
+
+canonicalize() {
+	cd "$1" || return
+	pwd
+}
+
+
+case $1 in "" | -h | --help)
+	echo "Usage: gocryptfssh encrypted_directory [unencrypted-directory [-p]]"
+	echo "  -p   mount the unencrypted directory as public"
+	exit 1
+	;;
+esac
+
+enc_dir=$1
+unenc_dir_given=false
+mount_public=false
+if [ ! -z "$2" ]; then
+    unenc_dir_given=true
+    unenc_dir=$2
+    for arg in "$@" ; do
+	if [ "$arg" = "-p" ]; then
+	    mount_public=true
+	fi
+    done
+    [ -d "$unenc_dir" ] || mkdir -- "$unenc_dir"
+else
+    unenc_dir=$(mktemp -d .XXXXXXXX)
+fi
+
+if [ ! -d "$enc_dir" ]; then
+    mkdir -- "$enc_dir"
+fi
+
+enc_dir=$(canonicalize "$enc_dir")
+unenc_dir=$(canonicalize "$unenc_dir")
+
+options=
+if [ "$unenc_dir_given" = "true" ]; then
+    if [ "$mount_public" = "true" ]; then
+	options="-- -o allow_other"
+    fi
+fi
+
+# Attach the directory and change into it
+
+if gocryptfs "$enc_dir" "$unenc_dir" $options; then :; else
+    echo "gocryptfs failed"
+    rmdir -- "$unenc_dir"
+    exit 1
+fi
+if ! [ "$unenc_dir_given" = "true" ]; then
+    chmod 700 "$unenc_dir"
+fi
+echo "Directory is $unenc_dir" >&2
+cd "$unenc_dir" || exit
+
+# Fall back to umount if fusermount is not available (e.g., on OS X)
+fuse_umount() {
+	if command -v fusermount >/dev/null 2>&1; then
+		fusermount -u "$@"
+	else
+		umount "$@" # MacOS case
+	fi
+}
+
+# Honor the SHELL environment variable to select a shell to run
+"$SHELL"; retval=$?
+
+# ensure that this shell isn't itself holding the mounted directory open
+# ...but avoid terminating on failure, *or* causing a shellcheck warning for
+#    failing to check exit status from cd.
+cd / ||:
+
+# if unmount fails, skip rmdir, always use exit status of failure
+fuse_umount "$unenc_dir" || exit
+
+if ! [ "$unenc_dir_given" = true ]; then
+	rmdir -- "$unenc_dir"
+fi
+exit "$retval"