etc/rc.d/initrandom

   1 #!/bin/sh
   2 #
   3 # $FreeBSD: src/etc/rc.d/initrandom,v 1.1 2002/06/13 22:14:36 gordon Exp $
   4 #
   5
   6 # PROVIDE: initrandom
   7 # REQUIRE: initdiskless
   8 # BEFORE: disks
   9
  10 . /etc/rc.subr
  11
  12 name="initrandom"
  13 start_cmd="initrandom_start"
  14 stop_cmd=":"
  15
  16 feed_dev_random()
  17 {
  18         if [ -f "${1}" -a -r "${1}" -a -s "${1}" ]; then
  19                 ${SYSCTL_W} kern.seedenable=1 >/dev/null
  20                 cat "${1}" | dd of=/dev/random bs=8k 2>/dev/null
  21                 ${SYSCTL_W} kern.seedenable=0 >/dev/null
  22         fi
  23 }
  24
  25 initrandom_start()
  26 {
  27         # First pass at reseeding /dev/random.
  28         #
  29         case ${entropy_file} in
  30         [Nn][Oo] | '')
  31                 ;;
  32         *)
  33                 if [ -w /dev/random ]; then
  34                         feed_dev_random "${entropy_file}"
  35                 fi
  36                 ;;
  37         esac
  38
  39         # Mix in more junk.  At the very least this will make seeding a
  40         # bit more machine specific.  The 'sysctl -a' will also catch the
  41         # TSC, 8254, and a few other things that tend to be somewhat more
  42         # random (even from a CD boot) so it isn't all that bad.
  43         #
  44         echo -n 'Initializing random seed: '
  45         ${SYSCTL_W} kern.seedenable=1 >/dev/null
  46         ( ps -fauxww; ${SYSCTL} -a; date; df -ib; dmesg; ps -fauxww; ) \
  47             2>&1 | dd of=/dev/random bs=8k 2>/dev/null
  48         cat /bin/ls | dd of=/dev/random bs=8k 2>/dev/null
  49         ${SYSCTL_W} kern.seedenable=0 >/dev/null
  50         echo 'done. '
  51 }
  52
  53 load_rc_config random
  54 run_rc_command "$1"