From 5e5f7167943b408ae55736a44908a82056c87780 Mon Sep 17 00:00:00 2001
From: Ludovic Courtès <ludo@gnu.org>
Date: Sat, 5 Oct 2019 21:54:31 +0200
Subject: syscalls: Add 'add-to-entropy-count'.

* guix/build/syscalls.scm (RNDADDTOENTCNT): New variable.
(add-to-entropy-count): New procedure.
* tests/syscalls.scm ("add-to-entropy-count"): New test.
---
 tests/syscalls.scm | 13 +++++++++++++
 1 file changed, 13 insertions(+)

(limited to 'tests')

diff --git a/tests/syscalls.scm b/tests/syscalls.scm
index eeb223b950..1b3121e503 100644
--- a/tests/syscalls.scm
+++ b/tests/syscalls.scm
@@ -567,6 +567,19 @@
   (let ((result (call-with-input-file "/var/run/utmpx" read-utmpx)))
     (or (utmpx? result) (eof-object? result))))
 
+(when (zero? (getuid))
+  (test-skip 1))
+(test-equal "add-to-entropy-count"
+  EPERM
+  (call-with-output-file "/dev/urandom"
+    (lambda (port)
+      (catch 'system-error
+        (lambda ()
+          (add-to-entropy-count port 77)
+          #f)
+        (lambda args
+          (system-error-errno args))))))
+
 (test-end)
 
 (false-if-exception (delete-file temp-file))
-- 
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