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