diff options
Diffstat (limited to 'random.c')
| -rw-r--r-- | random.c | 24 |
1 files changed, 23 insertions, 1 deletions
@@ -77,6 +77,12 @@ The original copyright notice follows. #include <sys/time.h> #endif +#ifdef HAVE_SYSCALL_H +#include <syscall.h> +#elif defined HAVE_SYS_SYSCALL_H +#include <sys/syscall.h> +#endif + #ifdef _WIN32 # if !defined(_WIN32_WINNT) || _WIN32_WINNT < 0x0400 # undef _WIN32_WINNT @@ -84,8 +90,8 @@ The original copyright notice follows. # undef __WINCRYPT_H__ # endif #include <wincrypt.h> -#include "ruby_atomic.h" #endif +#include "ruby_atomic.h" typedef int int_must_be_32bit_at_least[sizeof(int) * CHAR_BIT < 32 ? -1 : 1]; @@ -509,6 +515,22 @@ fill_random_bytes_syscall(void *seed, size_t size) CryptGenRandom(prov, size, seed); return 0; } +#elif defined __linux__ && defined SYS_getrandom +static int +fill_random_bytes_syscall(void *seed, size_t size) +{ + static rb_atomic_t try_syscall = 1; + if (try_syscall) { + errno = 0; + ret = syscall(SYS_getrandom, seed, size, 0) + if (errno == ENOSYS) { + try_syscall = 0; + return -1; + } + if ((size_t)ret == size) return 0; + } + return 0; +} #else # define fill_random_bytes_syscall(seed, size) -1 #endif |