From: Zbigniew Jędrzejewski-Szmek <zbyszek@in.waw.pl>
Date: Wed, 19 Apr 2017 20:13:27 +0000 (-0400)
Subject: basic/random-util: add new header for getrandom()
X-Git-Tag: v234~306^2~3
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=5224c2c7068ea538d2523ad033172450ccac147d;p=platform%2Fupstream%2Fsystemd.git

basic/random-util: add new header for getrandom()

There's some confusion: older man pages specify that linux/random.h
contains getrandom, but newer glibc has it in sys/random.h. Detect if
the newer header is available and include it. We still need the older
header for the flags.
---

diff --git a/configure.ac b/configure.ac
index 3436a9d..13e7583 100644
--- a/configure.ac
+++ b/configure.ac
@@ -328,7 +328,6 @@ AC_CHECK_DECLS([
         pivot_root,
         name_to_handle_at,
         setns,
-        getrandom,
         renameat2,
         kcmp,
         keyctl,
@@ -343,6 +342,13 @@ AC_CHECK_DECLS([
 #include <sched.h>
 #include <string.h>
 #include <linux/loop.h>
+]])
+
+AC_CHECK_DECLS([getrandom],
+               [AC_DEFINE([USE_SYS_RANDOM_H], [], [sys/random.h is usable])],
+               [AC_CHECK_DECLS([getrandom], [], [], [[
+#include <sys/random.h>
+]])], [[
 #include <linux/random.h>
 ]])
 
diff --git a/src/basic/random-util.c b/src/basic/random-util.c
index ad7b3ee..b216be5 100644
--- a/src/basic/random-util.c
+++ b/src/basic/random-util.c
@@ -27,7 +27,13 @@
 #include <stdint.h>
 
 #ifdef HAVE_SYS_AUXV_H
-#include <sys/auxv.h>
+#  include <sys/auxv.h>
+#endif
+
+#ifdef USE_SYS_RANDOM_H
+#  include <sys/random.h>
+#else
+#  include <linux/random.h>
 #endif
 
 #include "fd-util.h"