94 lines
1.6 KiB
Bash
94 lines
1.6 KiB
Bash
#!/bin/sh
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#
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# $FreeBSD$
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#
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# PROVIDE: random
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# REQUIRE: diskless mountcritlocal initrandom
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# BEFORE: netif
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# KEYWORD: FreeBSD nojail shutdown
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. /etc/rc.subr
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name="random"
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start_cmd="random_start"
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stop_cmd="random_stop"
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feed_dev_random()
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{
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if [ -f "${1}" -a -r "${1}" -a -s "${1}" ]; then
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cat "${1}" | dd of=/dev/random bs=8k 2>/dev/null
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fi
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}
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random_start()
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{
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# Reseed /dev/random with previously stored entropy.
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case ${entropy_dir} in
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[Nn][Oo])
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;;
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*)
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entropy_dir=${entropy_dir:-/var/db/entropy}
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if [ -d "${entropy_dir}" ]; then
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if [ -w /dev/random ]; then
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for seedfile in ${entropy_dir}/*; do
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feed_dev_random "${seedfile}"
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done
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fi
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fi
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;;
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esac
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case ${entropy_file} in
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[Nn][Oo] | '')
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;;
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*)
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if [ -w /dev/random ]; then
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feed_dev_random "${entropy_file}"
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fi
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;;
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esac
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}
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random_stop()
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{
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# Write some entropy so when the machine reboots /dev/random
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# can be reseeded
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#
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case ${entropy_file} in
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[Nn][Oo] | '')
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;;
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*)
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echo -n 'Writing entropy file:'
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rm -f ${entropy_file}
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oumask=`umask`
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umask 077
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if touch ${entropy_file}; then
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entropy_file_confirmed="${entropy_file}"
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else
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# Try this as a reasonable alternative for read-only
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# roots, diskless workstations, etc.
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rm -f /var/db/entropy
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if touch /var/db/entropy; then
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entropy_file_confirmed=/var/db/entropy
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fi
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fi
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case ${entropy_file_confirmed} in
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'')
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err 1 '${entropy_file_confirmed}:' \
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' entropy file write failed.'
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;;
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*)
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dd if=/dev/random of=${entropy_file_confirmed} \
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bs=4096 count=1 2> /dev/null
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echo '.'
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;;
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esac
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umask ${oumask}
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;;
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esac
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}
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load_rc_config $name
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run_rc_command "$1"
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