diff options
Diffstat (limited to 'REORG.TODO/sysdeps/unix/sysv/linux/getrandom.c')
-rw-r--r-- | REORG.TODO/sysdeps/unix/sysv/linux/getrandom.c | 43 |
1 files changed, 43 insertions, 0 deletions
diff --git a/REORG.TODO/sysdeps/unix/sysv/linux/getrandom.c b/REORG.TODO/sysdeps/unix/sysv/linux/getrandom.c new file mode 100644 index 0000000000..25eb6efdd6 --- /dev/null +++ b/REORG.TODO/sysdeps/unix/sysv/linux/getrandom.c @@ -0,0 +1,43 @@ +/* Implementation of 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 <errno.h> +#include <unistd.h> +#include <sysdep-cancel.h> + +#ifdef __NR_getrandom +/* Write LENGTH bytes of randomness starting at BUFFER. Return 0 on + success and -1 on failure. */ +ssize_t +getrandom (void *buffer, size_t length, unsigned int flags) +{ + return SYSCALL_CANCEL (getrandom, buffer, length, flags); +} +#else +/* Always provide a definition, even if the kernel headers lack the + system call number. */ +ssize_t +getrandom (void *buffer, size_t length, unsigned int flags) +{ + /* Ideally, we would add a cancellation point here, but we currently + cannot do so inside libc. */ + __set_errno (ENOSYS); + return -1; +} +#endif |