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dwelling-upload/tools/gen-salt.sh

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#!/usr/bin/sh
if [[ $EUID -ne 0 ]]; then
echo "Must run as root!" >&2;
exit 1
fi
# It will create a new encription key if it doesn't exists.
systemd-creds setup
if [[ $1 ]]; then
char_num=$1;
else
char_num=64;
fi
service_override=$(pkg-config systemd --variable=systemdsystemconfdir)/dwelling-upload.service.d/override.conf
if [ ! -f $service_override ]; then
echo "[Service]" > $service_override;
fi
cat /dev/urandom | tr -dc 'a-zA-Z0-9!@#$%^&*' | fold -w $char_num | head -n 1 \
| systemd-creds encrypt -qp --name=salt - - 2> /dev/null >> $service_override;
systemctl daemon-reload