From: Ian Jackson <ijackson@chiark.greenend.org.uk>
Date: Sat, 7 Aug 2021 11:14:07 +0000 (+0100)
Subject: Add 'uml/rndaddtoentcnt/' from commit '3cef9b224336ac4147aade20738420193e525fc5'
X-Git-Tag: hippotat/1.0.0~303
X-Git-Url: http://www.chiark.greenend.org.uk/ucgi/~ian/git?a=commitdiff_plain;h=1036bee2d05d60537f6c05679d9920942e79b957;p=hippotat.git

Add 'uml/rndaddtoentcnt/' from commit '3cef9b224336ac4147aade20738420193e525fc5'

git-subtree-dir: uml/rndaddtoentcnt
git-subtree-mainline: 488191f4770edfd9990ab847b061e4227f79a091
git-subtree-split: 3cef9b224336ac4147aade20738420193e525fc5
---

1036bee2d05d60537f6c05679d9920942e79b957
diff --cc uml/rndaddtoentcnt/.gitignore
index 0000000,0000000..a997b67
new file mode 100644
--- /dev/null
+++ b/uml/rndaddtoentcnt/.gitignore
@@@ -1,0 -1,0 +1,1 @@@
++rndaddtoentcnt
diff --cc uml/rndaddtoentcnt/LICENSE
index 0000000,4479b29..4479b29
mode 000000,100644..100644
--- a/uml/rndaddtoentcnt/LICENSE
+++ b/uml/rndaddtoentcnt/LICENSE
diff --cc uml/rndaddtoentcnt/Makefile
index 0000000,0000000..7b3c881
new file mode 100644
--- /dev/null
+++ b/uml/rndaddtoentcnt/Makefile
@@@ -1,0 -1,0 +1,6 @@@
++rndaddtoentcnt: rndaddtoentcnt.c
++	$(CC) rndaddtoentcnt.c -o rndaddtoentcnt
++
++.PHONY: clean
++clean:
++	rm -f *.o rndaddtoentcnt
diff --cc uml/rndaddtoentcnt/README.md
index 0000000,0000000..9f85b29
new file mode 100644
--- /dev/null
+++ b/uml/rndaddtoentcnt/README.md
@@@ -1,0 -1,0 +1,15 @@@
++### rndaddtoentcnt
++
++Seeding the random number generator by writing to /dev/urandom does not update the entropy count.
++
++This utility makes the RNDADDTOENTCNT ioctl call needed to do this.
++
++Used in startup scripts after initializing /dev/urandom with a presaved seed.
++
++Example:
++
++    dd if=/path/to/some/random-seed-file of=/dev/urandom bs=512 count=1
++
++    /path/to/rdnaddtoentcnt <entropy-bit-count>
++
++where entropy-bit-count is a number between 1 and (8 * 512) depending on how much you trust the seed file.
diff --cc uml/rndaddtoentcnt/rndaddtoentcnt.c
index 0000000,929bf4d..929bf4d
mode 000000,100644..100644
--- a/uml/rndaddtoentcnt/rndaddtoentcnt.c
+++ b/uml/rndaddtoentcnt/rndaddtoentcnt.c