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-rw-r--r--random.c8
1 files changed, 7 insertions, 1 deletions
diff --git a/random.c b/random.c
index 6452456..9f39dc2 100644
--- a/random.c
+++ b/random.c
@@ -516,6 +516,12 @@ fill_random_bytes_syscall(void *seed, size_t size)
return 0;
}
#elif defined __linux__ && defined SYS_getrandom
+#include <linux/random.h>
+
+# ifndef GRND_NONBLOCK
+# define GRND_NONBLOCK 0x0001 /* not defined in musl libc */
+# endif
+
static int
fill_random_bytes_syscall(void *seed, size_t size)
{
@@ -523,7 +529,7 @@ fill_random_bytes_syscall(void *seed, size_t size)
if (try_syscall) {
long ret;
errno = 0;
- ret = syscall(SYS_getrandom, seed, size, 0);
+ ret = syscall(SYS_getrandom, seed, size, GRND_NONBLOCK);
if (errno == ENOSYS) {
try_syscall = 0;
return -1;