diff options
Diffstat (limited to 'buildroot/skeleton/etc/init.d/S20urandom')
| -rwxr-xr-x | buildroot/skeleton/etc/init.d/S20urandom | 54 |
1 files changed, 54 insertions, 0 deletions
diff --git a/buildroot/skeleton/etc/init.d/S20urandom b/buildroot/skeleton/etc/init.d/S20urandom new file mode 100755 index 0000000..f73cea5 --- /dev/null +++ b/buildroot/skeleton/etc/init.d/S20urandom @@ -0,0 +1,54 @@ +#! /bin/sh +# +# urandom This script saves the random seed between reboots. +# It is called from the boot, halt and reboot scripts. +# +# Version: @(#)urandom 1.33 22-Jun-1998 miquels@cistron.nl +# + +[ -c /dev/urandom ] || exit 0 +#. /etc/default/rcS + +case "$1" in + start|"") + if [ "$VERBOSE" != no ] + then + echo -n "Initializing random number generator... " + fi + # Load and then save 512 bytes, + # which is the size of the entropy pool + if [ -f /etc/random-seed ] + then + cat /etc/random-seed >/dev/urandom + fi + # check for read only file system + if ! touch /etc/random-seed 2>/dev/null + then + echo "read-only file system detected...done" + exit + fi + rm -f /etc/random-seed + umask 077 + dd if=/dev/urandom of=/etc/random-seed count=1 \ + >/dev/null 2>&1 || echo "urandom start: failed." + umask 022 + [ "$VERBOSE" != no ] && echo "done." + ;; + stop) + if ! touch /etc/random-seed 2>/dev/null + then + exit + fi + # Carry a random seed from shut-down to start-up; + # see documentation in linux/drivers/char/random.c + [ "$VERBOSE" != no ] && echo -n "Saving random seed... " + umask 077 + dd if=/dev/urandom of=/etc/random-seed count=1 \ + >/dev/null 2>&1 || echo "urandom stop: failed." + [ "$VERBOSE" != no ] && echo "done." + ;; + *) + echo "Usage: urandom {start|stop}" >&2 + exit 1 + ;; +esac |