src/initscripts/system/random

   1 #!/bin/sh
   2 . /etc/sysconfig/rc
   3 . $rc_functions
   4
   5 if [ -e /proc/sys/kernel/random/poolsize ]; then
   6         poolsize=$(</proc/sys/kernel/random/poolsize);
   7         poolsize=$(expr $poolsize / 8 );
   8 else
   9         poolsize=512;
  10 fi
  11
  12 case "$1" in
  13         start)
  14
  15                 #CRNG init need 128bit so wait until there is more)
  16                 avail=$(</proc/sys/kernel/random/entropy_avail)
  17                 while [ $avail -lt 130 ]; do
  18                         avail=$(</proc/sys/kernel/random/entropy_avail)
  19                         boot_mesg -n "\rWait for entropy: $avail/130   "
  20                         # Generate some disc access to gather entropy
  21                         echo  avail > /var/tmp/random-tmpfile
  22                         sync
  23                         rm -f /var/tmp/random-tmpfile
  24                 done;
  25
  26                 boot_mesg "\rInitializing kernel random number generator..."
  27                 if [ -f /var/tmp/random-seed ]; then
  28                         /bin/cat /var/tmp/random-seed >/dev/urandom
  29                 fi
  30                 touch /var/tmp/random-seed
  31                 chmod 600 /var/tmp/random-seed
  32                 /bin/dd if=/dev/urandom of=/var/tmp/random-seed \
  33                         count=1 bs=$poolsize &>/dev/null
  34                 evaluate_retval
  35                 ;;
  36
  37         stop)
  38                 boot_mesg "Saving random seed..."
  39                 touch /var/tmp/random-seed
  40                 chmod 600 /var/tmp/random-seed
  41                 /bin/dd if=/dev/urandom of=/var/tmp/random-seed \
  42                         count=1 bs=$poolsize &>/dev/null
  43                 evaluate_retval
  44                 ;;
  45
  46         *)
  47                 echo "Usage: $0 {start|stop}"
  48                 exit 1
  49                 ;;
  50 esac
  51
  52 # End $rc_base/init.d/random