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319d2a7b60
This patch adds the GRND_INSECURE constant from Linux 5.6 to glibc's sys/random.h. This is also added to the documentation. The constant acts as a no-op for the Hurd implementation (as that doesn't check whether the flags are known), which is semantically fine, while older Linux kernels reject unknown flags with an EINVAL error. Tested for x86_64.
44 lines
1.4 KiB
C
44 lines
1.4 KiB
C
/* Interfaces for obtaining random bytes.
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Copyright (C) 2016-2020 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#ifndef _SYS_RANDOM_H
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#define _SYS_RANDOM_H 1
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#include <features.h>
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#include <sys/types.h>
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/* Flags for use with getrandom. */
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#define GRND_NONBLOCK 0x01
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#define GRND_RANDOM 0x02
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#define GRND_INSECURE 0x04
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__BEGIN_DECLS
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/* Write LENGTH bytes of randomness starting at BUFFER. Return the
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number of bytes written, or -1 on error. */
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ssize_t getrandom (void *__buffer, size_t __length,
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unsigned int __flags) __wur;
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/* Write LENGTH bytes of randomness starting at BUFFER. Return 0 on
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success or -1 on error. */
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int getentropy (void *__buffer, size_t __length) __wur;
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__END_DECLS
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#endif /* _SYS_RANDOM_H */
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