Add <sys/random.h>.
iOS 10 has <sys/random.h> with getentropy, glibc >= 2.25 has
<sys/random.h> with getentropy and getrandom. (glibc also pollutes
<unistd.h>, but that seems like a bad idea.)
Also, all supported devices now have kernels with the getrandom system
call.
We've had these available internally for a while, but it seems like the
time is ripe to expose them.
Bug: http://b/67014255
Test: ran tests
Change-Id: I76dde1e3a2d0bc82777eea437ac193f96964f138
diff --git a/libc/upstream-openbsd/android/include/openbsd-compat.h b/libc/upstream-openbsd/android/include/openbsd-compat.h
index d831435..f178149 100644
--- a/libc/upstream-openbsd/android/include/openbsd-compat.h
+++ b/libc/upstream-openbsd/android/include/openbsd-compat.h
@@ -18,10 +18,15 @@
#define _BIONIC_OPENBSD_COMPAT_H_included
#define _BSD_SOURCE
-
#include <sys/cdefs.h>
+
#include <stddef.h> // For size_t.
+// TODO: libandroid_support uses this file, so we need to wait for
+// <sys/random.h> to be in the NDK headers before we can lose this declaration.
+//#include <sys/random.h> // For getentropy.
+int getentropy(void*, size_t);
+
#define __BEGIN_HIDDEN_DECLS _Pragma("GCC visibility push(hidden)")
#define __END_HIDDEN_DECLS _Pragma("GCC visibility pop")
@@ -75,9 +80,6 @@
__LIBC_HIDDEN__ extern const char* __bionic_get_shell_path();
#define _PATH_BSHELL __bionic_get_shell_path()
-/* We have OpenBSD's getentropy_linux.c, but we don't mention getentropy in any header. */
-__LIBC_HIDDEN__ extern int getentropy(void*, size_t);
-
/* OpenBSD has this as API, but we just use it internally. */
__LIBC_HIDDEN__ void* reallocarray(void*, size_t, size_t);