49 lines
1.1 KiB
Rust
49 lines
1.1 KiB
Rust
// SPDX-License-Identifier: MPL-2.0
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use crate::events::IoEvents;
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use crate::fs::device::{Device, DeviceId, DeviceType};
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use crate::fs::inode_handle::FileIo;
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use crate::prelude::*;
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use crate::process::signal::Poller;
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pub struct Random;
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impl Random {
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pub fn getrandom(buf: &mut [u8]) -> Result<usize> {
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getrandom::getrandom(buf)?;
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Ok(buf.len())
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}
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}
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impl Device for Random {
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fn type_(&self) -> DeviceType {
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DeviceType::CharDevice
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}
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fn id(&self) -> DeviceId {
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// The same value as Linux
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DeviceId::new(1, 8)
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}
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}
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impl FileIo for Random {
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fn read(&self, buf: &mut [u8]) -> Result<usize> {
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Self::getrandom(buf)
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}
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fn write(&self, buf: &[u8]) -> Result<usize> {
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Ok(buf.len())
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}
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fn poll(&self, mask: IoEvents, poller: Option<&Poller>) -> IoEvents {
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let events = IoEvents::IN | IoEvents::OUT;
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events & mask
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}
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}
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impl From<getrandom::Error> for Error {
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fn from(value: getrandom::Error) -> Self {
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Error::with_message(Errno::ENOSYS, "cannot generate random bytes")
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}
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}
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