aboutsummaryrefslogtreecommitdiff
path: root/sysdeps/unix/sysv/linux/getentropy.c
diff options
context:
space:
mode:
Diffstat (limited to 'sysdeps/unix/sysv/linux/getentropy.c')
-rw-r--r--sysdeps/unix/sysv/linux/getentropy.c73
1 files changed, 0 insertions, 73 deletions
diff --git a/sysdeps/unix/sysv/linux/getentropy.c b/sysdeps/unix/sysv/linux/getentropy.c
deleted file mode 100644
index 14e5e91392..0000000000
--- a/sysdeps/unix/sysv/linux/getentropy.c
+++ /dev/null
@@ -1,73 +0,0 @@
-/* Implementation of getentropy based on the getrandom system call.
- Copyright (C) 2016-2017 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/>. */
-
-#include <sys/random.h>
-#include <assert.h>
-#include <errno.h>
-#include <unistd.h>
-
-#ifdef __NR_getrandom
-/* Write LENGTH bytes of randomness starting at BUFFER. Return 0 on
- success and -1 on failure. */
-int
-getentropy (void *buffer, size_t length)
-{
- /* The interface is documented to return EIO for buffer lengths
- longer than 256 bytes. */
- if (length > 256)
- {
- __set_errno (EIO);
- return -1;
- }
-
- /* Try to fill the buffer completely. Even with the 256 byte limit
- above, we might still receive an EINTR error (when blocking
- during boot). */
- void *end = buffer + length;
- while (buffer < end)
- {
- /* NB: No cancellation point. */
- ssize_t bytes = INLINE_SYSCALL_CALL (getrandom, buffer, end - buffer, 0);
- if (bytes < 0)
- {
- if (errno == EINTR)
- /* Try again if interrupted by a signal. */
- continue;
- else
- return -1;
- }
- if (bytes == 0)
- {
- /* No more bytes available. This should not happen under
- normal circumstances. */
- __set_errno (EIO);
- return -1;
- }
- /* Try again in case of a short read. */
- buffer += bytes;
- }
- return 0;
-}
-#else
-int
-getentropy (void *buffer, size_t length)
-{
- __set_errno (ENOSYS);
- return -1;
-}
-#endif