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#!/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
MYNAME=$(basename $0)
if [[ $# != 4 ]]; then
echo "$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=$2
if mountpoint "$DST" > /dev/null; then
echo "$MYNAME: something is already mounted on $DST, refusing"
exit 2
fi
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
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