Merge from vendor branch LESS:
[dragonfly.git] / etc / rc.d / random
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1#!/bin/sh
2#
3# $FreeBSD: src/etc/rc.d/random,v 1.3 2003/04/18 17:55:05 mtm Exp $
ea31c272 4# $DragonFly: src/etc/rc.d/random,v 1.4 2006/07/10 22:19:14 dillon Exp $
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5#
6
7# PROVIDE: random
8# REQUIRE: diskless mountcritlocal initrandom
9# BEFORE: netif
696a5717 10# KEYWORD: shutdown
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11
12. /etc/rc.subr
13
14name="random"
15start_cmd="random_start"
16stop_cmd="random_stop"
17
18feed_dev_random()
19{
20 if [ -f "${1}" -a -r "${1}" -a -s "${1}" ]; then
ea31c272 21 sysctl kern.seedenable=1
9c600e7d 22 cat "${1}" | dd of=/dev/random bs=8k 2>/dev/null
ea31c272 23 sysctl kern.seedenable=1
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24 fi
25}
26
27random_start()
28{
29 # Reseed /dev/random with previously stored entropy.
30 case ${entropy_dir} in
31 [Nn][Oo])
32 ;;
33 *)
34 entropy_dir=${entropy_dir:-/var/db/entropy}
35 if [ -d "${entropy_dir}" ]; then
36 if [ -w /dev/random ]; then
37 for seedfile in ${entropy_dir}/*; do
38 feed_dev_random "${seedfile}"
39 done
40 fi
41 fi
42 ;;
43 esac
44
45 case ${entropy_file} in
46 [Nn][Oo] | '')
47 ;;
48 *)
49 if [ -w /dev/random ]; then
50 feed_dev_random "${entropy_file}"
51 fi
52 ;;
53 esac
54}
55
56random_stop()
57{
58 # Write some entropy so when the machine reebots /dev/random
59 # can be reseeded
60 #
61 case ${entropy_file} in
62 [Nn][Oo] | '')
63 ;;
64 *)
65 echo -n 'Writing entropy file:'
66 rm -f ${entropy_file}
67 oumask=`umask`
68 umask 077
69 if touch ${entropy_file}; then
70 entropy_file_confirmed="${entropy_file}"
71 else
72 # Try this as a reasonable alternative for read-only
73 # roots, diskless workstations, etc.
74 rm -f /var/db/entropy
75 if touch /var/db/entropy; then
76 entropy_file_confirmed=/var/db/entropy
77 fi
78 fi
79 case ${entropy_file_confirmed} in
80 '')
81 err 1 '${entropy_file_confirmed}:' \
82 ' entropy file write failed.'
83 ;;
84 *)
85 dd if=/dev/random of=${entropy_file_confirmed} \
86 bs=4096 count=1 2> /dev/null
87 echo '.'
88 ;;
89 esac
90 umask ${oumask}
91 ;;
92 esac
93}
94
95load_rc_config $name
96run_rc_command "$1"