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 [ -w /dev/random ]; then
  32                         if checkyesno harvest_interrupt; then
  33                                 ${SYSCTL_W} kern.random.sys.harvest.interrupt=1 >/dev/null
  34                                 echo -n ' interrupts'
  35                         else
  36                                 ${SYSCTL_W} kern.random.sys.harvest.interrupt=0 >/dev/null
  37                         fi
  38
  39                         if checkyesno harvest_ethernet; then
  40                                 ${SYSCTL_W} kern.random.sys.harvest.ethernet=1 >/dev/null
  41                                 echo -n ' ethernet'
  42                         else
  43                                 ${SYSCTL_W} kern.random.sys.harvest.ethernet=0 >/dev/null
  44                         fi
  45
  46                         if checkyesno harvest_p_to_p; then
  47                                 ${SYSCTL_W} kern.random.sys.harvest.point_to_point=1 >/dev/null
  48                                 echo -n ' point_to_point'
  49                         else
  50                                 ${SYSCTL_W} kern.random.sys.harvest.point_to_point=0 >/dev/null
  51                         fi
  52                 fi
  53
  54                 # XXX temporary until we can improve the entropy
  55                 # harvesting rate.
  56                 # Entropy below is not great, but better than nothing.
  57                 # This unblocks the generator at startup
  58                 ( ps -fauxww; sysctl -a; date; df -ib; dmesg; ps -fauxww ) \
  59                     | dd of=/dev/random bs=8k 2>/dev/null
  60                 cat /bin/ls | dd of=/dev/random bs=8k 2>/dev/null
  61
  62                 # First pass at reseeding /dev/random.
  63                 #
  64                 case ${entropy_file} in
  65                 [Nn][Oo] | '')
  66                         ;;
  67                 *)
  68                         if [ -w /dev/random ]; then
  69                                 feed_dev_random "${entropy_file}"
  70                         fi
  71                         ;;
  72                 esac
  73
  74                 echo -n ' kickstart'
  75         fi
  76
  77         echo '.'
  78 }
  79
  80 load_rc_config random
  81 run_rc_command "$1"