From: Ken Sharp <ken.sh...@ni.com>
If the seed file is empty or does not exist, the date is an extremely
poor backup source of entropy, but it is better than nothing.
Signed-off-by: Richard Tollerton <rich.toller...@ni.com>
Signed-off-by: Ben Shelton <ben.shel...@ni.com>
---
meta/recipes-core/initscripts/initscripts-1.0/urandom | 11 +++++------
1 file changed, 5 insertions(+), 6 deletions(-)
diff --git a/meta/recipes-core/initscripts/initscripts-1.0/urandom
b/meta/recipes-core/initscripts/initscripts-1.0/urandom
index a0549de..ec4ef61 100755
--- a/meta/recipes-core/initscripts/initscripts-1.0/urandom
+++ b/meta/recipes-core/initscripts/initscripts-1.0/urandom
@@ -20,12 +20,11 @@ RANDOM_SEED_FILE=/var/lib/urandom/random-seed
case "$1" in
start|"")
test "$VERBOSE" != no && echo "Initializing random number
generator..."
- # Load and then save 512 bytes,
- # which is the size of the entropy pool
- if test -f "$RANDOM_SEED_FILE"
- then
- cat "$RANDOM_SEED_FILE" >/dev/urandom
- fi
+ # Load and then save 512 bytes, which is the size of the entropy
+ # pool. Also load the current date, in case the seed file is
+ # empty.
+ ( date +%s.%N; [ -f "$RANDOM_SEED_FILE" ] && cat
"$RANDOM_SEED_FILE" ) \
+ >/dev/urandom
rm -f "$RANDOM_SEED_FILE"
umask 077
dd if=/dev/urandom of=$RANDOM_SEED_FILE count=1 \
--
2.0.1
--
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