etc/rc.d/initrandom

   1 #!/bin/sh
   2 #
   3 # $FreeBSD$
   4 #
   5
   6 # PROVIDE: initrandom
   7 # REQUIRE: dumpon ddb
   8 # BEFORE: disks
   9 # KEYWORD: nojail
  10
  11 . /etc/rc.subr
  12
  13 name="initrandom"
  14 start_cmd="initrandom_start"
  15 stop_cmd=":"
  16
  17 feed_dev_random()
  18 {
  19         if [ -f "${1}" -a -r "${1}" -a -s "${1}" ]; then
  20                 cat "${1}" | dd of=/dev/random bs=8k 2>/dev/null
  21         fi
  22 }
  23
  24 initrandom_start()
  25 {
  26         soft_random_generator=`sysctl kern.random 2>/dev/null`
  27
  28         echo -n 'Entropy harvesting:'
  29
  30         if [ \! -z "${soft_random_generator}" ] ; then
  31
  32                 if [ -w /dev/random ]; then
  33                         if checkyesno harvest_interrupt; then
  34                                 ${SYSCTL} kern.random.sys.harvest.interrupt=1 >/dev/null
  35                                 echo -n ' interrupts'
  36                         else
  37                                 ${SYSCTL} kern.random.sys.harvest.interrupt=0 >/dev/null
  38                         fi
  39
  40                         if checkyesno harvest_ethernet; then
  41                                 ${SYSCTL} kern.random.sys.harvest.ethernet=1 >/dev/null
  42                                 echo -n ' ethernet'
  43                         else
  44                                 ${SYSCTL} kern.random.sys.harvest.ethernet=0 >/dev/null
  45                         fi
  46
  47                         if checkyesno harvest_p_to_p; then
  48                                 ${SYSCTL} kern.random.sys.harvest.point_to_point=1 >/dev/null
  49                                 echo -n ' point_to_point'
  50                         else
  51                                 ${SYSCTL} kern.random.sys.harvest.point_to_point=0 >/dev/null
  52                         fi
  53                 fi
  54
  55                 # XXX temporary until we can improve the entropy
  56                 # harvesting rate.
  57                 # Entropy below is not great, but better than nothing.
  58                 # This unblocks the generator at startup
  59                 ( ps -fauxww; sysctl -a; date; df -ib; dmesg; ps -fauxww ) \
  60                     | dd of=/dev/random bs=8k 2>/dev/null
  61                 cat /bin/ls | dd of=/dev/random bs=8k 2>/dev/null
  62
  63                 # First pass at reseeding /dev/random.
  64                 #
  65                 case ${entropy_file} in
  66                 [Nn][Oo] | '')
  67                         ;;
  68                 *)
  69                         if [ -w /dev/random ]; then
  70                                 feed_dev_random "${entropy_file}"
  71                         fi
  72                         ;;
  73                 esac
  74
  75                 echo -n ' kickstart'
  76         fi
  77
  78         echo '.'
  79 }
  80
  81 load_rc_config random
  82 run_rc_command "$1"