Add evutil_secure_rng_set_urandom_device_file

This experimental function is needed for some seccomp2 hackery to
work, and should have no effect for systems that don't use it.

1 files changed, 17 insertions, 0 deletions

diff --git a/evutil_rand.c b/evutil_rand.c
index 284e230e..3c2c81de 100644
--- a/evutil_rand.c
+++ b/evutil_rand.c
@@ -43,6 +43,12 @@
 #include <stdlib.h>
 #include <string.h>
 int
+evutil_secure_rng_set_urandom_device_file(char *fname)
+{
+	(void) fname;
+	return -1;
+}
+int
 evutil_secure_rng_init(void)
 {
 	/* call arc4random() now to force it to self-initialize */
@@ -124,6 +130,17 @@ evutil_secure_rng_global_setup_locks_(const int enable_locks)
 #endif
 
 int
+evutil_secure_rng_set_urandom_device_file(char *fname)
+{
+#ifdef TRY_SEED_URANDOM
+	_ARC4_LOCK();
+	arc4random_urandom_filename = fname;
+	_ARC4_UNLOCK();
+#endif
+	return 0;
+}
+
+int
 evutil_secure_rng_init(void)
 {
 	int val;