contrib: pam_mount: add documentation and wrapper

See ticket #34

1 files changed, 31 insertions, 0 deletions

diff --git a/contrib/pam_mount/gocryptfs_pam_mount.bash b/contrib/pam_mount/gocryptfs_pam_mount.bash
new file mode 100755
index 0000000..3c7e48d
--- /dev/null
+++ b/contrib/pam_mount/gocryptfs_pam_mount.bash
@@ -0,0 +1,31 @@
+#!/bin/bash
+#
+# Simple bash script to transform the command-line arguments that
+# pam_mount passes to gocryptfs into something that gocryptfs
+# understands.
+#
+# Currently understood: nonempty,allow_other,quiet.
+# Unknown options are ignored.
+
+exec >&2
+set -eu
+
+if [[ $# != 4 ]]; then
+	MYNAME=$(basename $0)
+	echo "$MYNAME: expected 4 arguments, got $#"
+	echo "Example: $MYNAME /home/user.crypt /home/user.plain -o allow_other"
+	echo "Example: $MYNAME /home/user.crypt /home/user.plain -o defaults"
+	exit 1
+fi
+
+SRC=$1
+DST=$2
+GOPTS=""
+for OPT in nonempty allow_other quiet; do
+	if [[ $4 == *$OPT* ]]; then
+		GOPTS="$GOPTS -$OPT"
+	fi
+done
+
+cd "$(dirname "$0")"
+exec ./gocryptfs $GOPTS $SRC $DST