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authorFlorian Weimer <fweimer@redhat.com>2016-12-12 17:28:03 +0100
committerFlorian Weimer <fweimer@redhat.com>2016-12-12 17:28:04 +0100
commit92dcaa3e2f7bf0f7f1c04cd2fb6a317df1a4e225 (patch)
tree31c4343ff83e493044ed9678650b790d482cb9d5 /stdlib/sys
parent341657bc9c17d3ea4546c6d998e67ca349a78e80 (diff)
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Add getentropy, getrandom, <sys/random.h> [BZ #17252]
Diffstat (limited to 'stdlib/sys')
-rw-r--r--stdlib/sys/random.h42
1 files changed, 42 insertions, 0 deletions
diff --git a/stdlib/sys/random.h b/stdlib/sys/random.h
new file mode 100644
index 0000000..610b468
--- /dev/null
+++ b/stdlib/sys/random.h
@@ -0,0 +1,42 @@
+/* Interfaces for obtaining random bytes.
+ Copyright (C) 2016 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 of the License, or (at your option) any later version.
+
+ The GNU C Library is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, see
+ <http://www.gnu.org/licenses/>. */
+
+#ifndef _SYS_RANDOM_H
+#define _SYS_RANDOM_H 1
+
+#include <features.h>
+#include <sys/types.h>
+
+/* Flags for use with getrandom. */
+#define GRND_NONBLOCK 0x01
+#define GRND_RANDOM 0x02
+
+__BEGIN_DECLS
+
+/* Write LENGTH bytes of randomness starting at BUFFER. Return the
+ number of bytes written, or -1 on error. */
+ssize_t getrandom (void *__buffer, size_t __length,
+ unsigned int __flags) __wur;
+
+/* Write LENGTH bytes of randomness starting at BUFFER. Return 0 on
+ success or -1 on error. */
+int getentropy (void *__buffer, size_t __length) __wur;
+
+__END_DECLS
+
+#endif /* _SYS_RANDOM_H */