cease inefficient /dev/urandom fiddling.

Instead of reading /dev/urandom like a file (i.e. overhead / extra
syscalls, etc.), just use getrandom(2) directly, lol.

Signed-off-by: Gediminas Jakutis <gediminas@varciai.lt>

1 files changed, 2 insertions, 5 deletions

diff --git a/src/main.c b/src/main.c
index e3455d1..390be6a 100644
--- a/src/main.c
+++ b/src/main.c
@@ -13,8 +13,6 @@
 #include "cache.h"
 #include "datagen.h"
 
-static char randfile[] = "/dev/urandom";
-
 static struct settings settings = {0};
 
 static int parseargs(int argc, char **argv, struct settings * settings);
@@ -38,8 +36,7 @@ int main(int argc, char **argv)
 	try_s((ret = parseargs(argc, argv, &settings)), early_out);
 
 	if (settings.opmode == mode_generate) {
-		file_in.name = randfile;
-		file_in.type = stream_chardev;
+		file_in.type = stream_randread;
 		file_in.n = settings.to;
 	} else {
 		file_in.name = settings.filein;
@@ -188,7 +185,7 @@ int load_io_functions(struct settings const * const s, struct stream * const in)
 		} else {
 			/* TODO */
 		}
-	} else if (in->type == stream_chardev) { /* data generation streams do not support dumping nor any cache I/O beyond initial data generation */
+	} else if (in->type == stream_randread) { /* data generation streams do not support dumping nor any cache I/O beyond initial data generation */
 		if (s->format == array) {
 			in->get_next_element_direct = gen_get_array;
 			in->place_next_element_cache = cached_put_array;