Any system that provides `/dev/urandom` should be allowed to try to use it.
Signed-off-by: Eric Engestrom <eric.engestrom@intel.com>
Reviewed-by: Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/2316>
When the caller asked for a randomised_seed, we should fall back to the
time-based seed instead of the fixed seed.
Signed-off-by: Eric Engestrom <eric.engestrom@intel.com>
Reviewed-by: Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/2316>
This function has been added in glibc 2.25, and the related syscall in
Linux 3.17, in order to avoid requiring the /dev/urandom to exist, and
doing the open()/read()/close() dance on it.
We pass GRND_NONBLOCK so that it doesn’t block if not enough entropy has
been gathered to initialise the /dev/urandom source, and fallback to the
next source in any error case.
Signed-off-by: Emmanuel Gil Peyrot <linkmauve@linkmauve.fr>
Reviewed-by: Eric Engestrom <eric.engestrom@intel.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/2026>
Fixes for:
src/util/rand_xor.c:60:13: error: implicit declaration of function 'open' [-Werror=implicit-function-declaration]
int fd = open("/dev/urandom", O_RDONLY);
^~~~
src/util/rand_xor.c:60:34: error: 'O_RDONLY' undeclared (first use in this function)
int fd = open("/dev/urandom", O_RDONLY);
^~~~~~~~
Signed-off-by: Nicolas Dechesne <nicolas.dechesne@linaro.org>
Reviewed-by: Eric Engestrom <eric.engestrom@imgtec.com>
V2: pass the seed to the seed function so that we can isolate
its uses. Stop leaking fd when urandom couldn't be read.
Reviewed-by: Grazvydas Ignotas <notasas@gmail.com>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
V2: pass the seed to rand_xorshift128plus() so that we can isolate
its uses.
Reviewed-by: Grazvydas Ignotas <notasas@gmail.com>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
Eric Engestrom
Emmanuel Gil Peyrot
Nicolas Dechesne
Timothy Arceri