sourceturner
30 lines
851 B
Rust
30 lines
851 B
Rust
//! `sys/random.h` implementation.
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//!
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//! Non-POSIX, see <https://www.man7.org/linux/man-pages/man2/getrandom.2.html>.
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use core::slice;
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use crate::{
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error::ResultExt,
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platform::{
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Pal, Sys,
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types::{c_uint, c_void, size_t, ssize_t},
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},
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};
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/// See <https://www.man7.org/linux/man-pages/man2/getrandom.2.html>.
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pub const GRND_NONBLOCK: c_uint = 1;
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/// See <https://www.man7.org/linux/man-pages/man2/getrandom.2.html>.
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pub const GRND_RANDOM: c_uint = 2;
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/// See <https://www.man7.org/linux/man-pages/man2/getrandom.2.html>.
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#[unsafe(no_mangle)]
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pub unsafe extern "C" fn getrandom(buf: *mut c_void, buflen: size_t, flags: c_uint) -> ssize_t {
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Sys::getrandom(
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unsafe { slice::from_raw_parts_mut(buf as *mut u8, buflen as usize) },
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flags,
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)
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.map(|read| read as ssize_t)
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.or_minus_one_errno()
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}
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