200a9669f
Denys Vlasenko
2023-04-10
Subject
seedrng: fix for glibc <= 2.24 not providing getrandom()
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miscutils/seedrng.c+14 -0
| @@ -45,6 +45,20 @@ | |
| #include <sys/random.h> | |
| #include <sys/file.h> | |
| + | /* Fix up glibc <= 2.24 not having getrandom() */ |
| + | #if defined(__GLIBC__) && __GLIBC__ == 2 && __GLIBC_MINOR__ <= 24 |
| + | #include <sys/syscall.h> |
| + | # define getrandom(...) bb_getrandom(__VA_ARGS__) |
| + | static ssize_t getrandom(void *buffer, size_t length, unsigned flags) |
| + | { |
| + | # if defined(__NR_getrandom) |
| + | return syscall(__NR_getrandom, buffer, length, flags); |
| + | # else |
| + | return ENOSYS; |
| + | # endif |
| + | } |
| + | #endif |
| + | |
| #ifndef GRND_INSECURE | |
| #define GRND_INSECURE 0x0004 /* Apparently some headers don't ship with this yet. */ | |
| #endif | |