etc/rc.d/initrandom

   1 #!/bin/sh
   2 #
   3 # $FreeBSD$
   4 #
   5
   6 # PROVIDE: initrandom
   7 # BEFORE: disks
   8 # KEYWORD: nojail
   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 "${1}" ]; then
  19                 cat "${1}" | dd of=/dev/random bs=8k 2>/dev/null
  20         fi
  21 }
  22
  23 initrandom_start()
  24 {
  25         soft_random_generator=`sysctl kern.random 2>/dev/null`
  26
  27         echo -n 'Entropy harvesting:'
  28
  29         if [ \! -z "${soft_random_generator}" ] ; then
  30
  31                 if checkyesno harvest_interrupt; then
  32                         if [ -w /dev/random ]; then
  33                                 ${SYSCTL_W} kern.random.sys.harvest.interrupt=1 >/dev/null
  34                                 echo -n ' interrupts'
  35                         fi
  36                 fi
  37
  38                 if checkyesno harvest_ethernet; then
  39                         if [ -w /dev/random ]; then
  40                                 ${SYSCTL_W} kern.random.sys.harvest.ethernet=1 >/dev/null
  41                                 echo -n ' ethernet'
  42                         fi
  43                 fi
  44
  45                 if checkyesno harvest_p_to_p; then
  46                         if [ -w /dev/random ]; then
  47                         ${SYSCTL_W} kern.random.sys.harvest.point_to_point=1 >/dev/null
  48                                 echo -n ' point_to_point'
  49                         fi
  50                 fi
  51
  52                 # XXX temporary until we can improve the entropy
  53                 # harvesting rate.
  54                 # Entropy below is not great, but better than nothing.
  55                 # This unblocks the generator at startup
  56                 ( ps -fauxww; sysctl -a; date; df -ib; dmesg; ps -fauxww ) \
  57                     | dd of=/dev/random bs=8k 2>/dev/null
  58                 cat /bin/ls | dd of=/dev/random bs=8k 2>/dev/null
  59
  60                 # First pass at reseeding /dev/random.
  61                 #
  62                 case ${entropy_file} in
  63                 [Nn][Oo] | '')
  64                         ;;
  65                 *)
  66                         if [ -w /dev/random ]; then
  67                                 feed_dev_random "${entropy_file}"
  68                         fi
  69                         ;;
  70                 esac
  71
  72                 echo -n ' kickstart'
  73         fi
  74
  75         echo '.'
  76 }
  77
  78 load_rc_config random
  79 run_rc_command "$1"