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- #! /bin/sh
- #
- # Preserve the random seed between reboots. See urandom(4).
- #
- # This script can be called multiple times during operation (e.g. with
- # "reload" argument) to refresh the seed.
- # The following arguments can be added to SEEDRNG_ARGS in
- # /etc/default/seedrng:
- # --seed-dir=/path/to/seed/directory
- # Path to the directory where the seed and the lock files are stored.
- # for optimal operation, this should be a persistent, writeable
- # location. Default is /var/lib/seedrng
- #
- # --skip-credit
- # Set this to true only if you do not want seed files to actually
- # credit the RNG, for example if you plan to replicate this file
- # system image and do not have the wherewithal to first delete the
- # contents of /var/lib/seedrng.
- #
- # Example:
- # SEEDRNG_ARGS="--seed-dir=/data/seedrng --skip-credit"
- #
- DAEMON="seedrng"
- SEEDRNG_ARGS=""
- # shellcheck source=/dev/null
- [ -r "/etc/default/$DAEMON" ] && . "/etc/default/$DAEMON"
- case "$1" in
- start|stop|restart|reload)
- # Never fail, as this isn't worth making a fuss
- # over if it doesn't go as planned.
- # shellcheck disable=SC2086 # we need the word splitting
- seedrng $SEEDRNG_ARGS || true;;
- *)
- echo "Usage: $0 {start|stop|restart|reload}"
- exit 1
- esac
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