| /** We have to replace glibc getrandom only when glibc version is higher than 2.25. |
| * In previous versions of glibc this function doesn't exist |
| * and old kernels may be missing SYS_getrandom syscall. |
| */ |
| #include <features.h> |
| #if defined(__GLIBC__) && __GLIBC__ >= 2 |
| # define GLIBC_MINOR __GLIBC_MINOR__ |
| #elif defined (__GNU_LIBRARY__) && __GNU_LIBRARY__ >= 2 |
| # define GLIBC_MINOR __GNU_LIBRARY_MINOR__ |
| #endif |
| |
| #if defined(GLIBC_MINOR) && GLIBC_MINOR >= 25 |
| |
| #include <unistd.h> |
| #include <syscall.h> |
| #include "syscall.h" |
| |
| ssize_t getrandom(void *buf, size_t buflen, unsigned flags) |
| { |
| /// There was cancellable syscall (syscall_cp), but I don't care too. |
| return syscall(SYS_getrandom, buf, buflen, flags); |
| } |
| #endif |
