diff options
Diffstat (limited to 'vendor/rustix/src/backend/libc/rand/syscalls.rs')
-rw-r--r-- | vendor/rustix/src/backend/libc/rand/syscalls.rs | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/vendor/rustix/src/backend/libc/rand/syscalls.rs b/vendor/rustix/src/backend/libc/rand/syscalls.rs new file mode 100644 index 000000000..1c4286235 --- /dev/null +++ b/vendor/rustix/src/backend/libc/rand/syscalls.rs @@ -0,0 +1,16 @@ +//! libc syscalls supporting `rustix::rand`. + +#[cfg(target_os = "linux")] +use {super::super::c, super::super::conv::ret_ssize_t, crate::io, crate::rand::GetRandomFlags}; + +#[cfg(target_os = "linux")] +pub(crate) fn getrandom(buf: &mut [u8], flags: GetRandomFlags) -> io::Result<usize> { + // `getrandom` wasn't supported in glibc until 2.25. + weak_or_syscall! { + fn getrandom(buf: *mut c::c_void, buflen: c::size_t, flags: c::c_uint) via SYS_getrandom -> c::ssize_t + } + + let nread = + unsafe { ret_ssize_t(getrandom(buf.as_mut_ptr().cast(), buf.len(), flags.bits()))? }; + Ok(nread as usize) +} |