path: root/urandom.conf
diff options
authorJohn Denker <>2013-11-06 00:00:29 (GMT)
committerJohn Denker <>2013-11-06 00:04:01 (GMT)
commit1c30e25f4adf015865d57a7b5ab670cde446c82c (patch)
tree00461ba711573090c7a219d00f2eb5955ee9176c /urandom.conf
parent8719931af04b7073ece38507a35a6e975d2ac2f7 (diff)
first draft: urandom.conf startup script
Diffstat (limited to 'urandom.conf')
1 files changed, 29 insertions, 0 deletions
diff --git a/urandom.conf b/urandom.conf
new file mode 100644
index 0000000..1b40057
--- /dev/null
+++ b/urandom.conf
@@ -0,0 +1,29 @@
+# urandom - load seed-file into kernel pseudorandom number generator
+# This task is run on startup, as early as possible.
+description "load seed-file into urandom"
+# Initialize the PRNG as early as possible.
+# Actually, nothing upstart can do is early enough,
+# but this is better than nothing.
+# Note that the root filesystem is probably still read-only at this point.
+start on startup
+# The "urandom" event means the PRNG has been initialized.
+# You it may be possible to use /dev/random before this, at your own risk.
+emits urandom
+console output
+ SAVEDFILE=/var/lib/urandom/random-seed # probably belongs in a config file
+ if test -r "$SAVEDFILE" ; then
+ cat "$SAVEDFILE" > /dev/urandom
+ initctl emit urandom
+ fi
+end script
+# The seed file SHOULD NOT be reused.
+# We rely on urandom-save and urandom-adios to rewrite the seed file.