4lDO2
4d7da495f5
This does the same as the previous MR, but fixes the issue where the parent process got the mapping (and at the wrong address) and not the child process.
50 lines
1.3 KiB
Rust
50 lines
1.3 KiB
Rust
//! File structs
|
|
|
|
use alloc::sync::Arc;
|
|
use crate::event;
|
|
use spin::RwLock;
|
|
use crate::scheme::{self, SchemeNamespace, SchemeId};
|
|
use crate::syscall::error::{Result, Error, EBADF};
|
|
|
|
/// A file description
|
|
#[derive(Clone, Copy, Debug)]
|
|
pub struct FileDescription {
|
|
/// The namespace the file was opened from (used for debugging)
|
|
pub namespace: SchemeNamespace,
|
|
/// The scheme that this file refers to
|
|
pub scheme: SchemeId,
|
|
/// The number the scheme uses to refer to this file
|
|
pub number: usize,
|
|
/// The flags passed to open or fcntl(SETFL)
|
|
pub flags: usize,
|
|
}
|
|
|
|
/// A file descriptor
|
|
#[derive(Clone, Debug)]
|
|
#[must_use = "File descriptors must be closed"]
|
|
pub struct FileDescriptor {
|
|
/// Corresponding file description
|
|
pub description: Arc<RwLock<FileDescription>>,
|
|
/// Cloexec flag
|
|
pub cloexec: bool,
|
|
}
|
|
|
|
impl FileDescriptor {
|
|
pub fn close(self) -> Result<usize> {
|
|
if let Ok(file) = Arc::try_unwrap(self.description) {
|
|
let file = file.into_inner();
|
|
|
|
event::unregister_file(file.scheme, file.number);
|
|
|
|
let scheme = {
|
|
let schemes = scheme::schemes();
|
|
let scheme = schemes.get(file.scheme).ok_or(Error::new(EBADF))?;
|
|
scheme.clone()
|
|
};
|
|
scheme.close(file.number)
|
|
} else {
|
|
Ok(0)
|
|
}
|
|
}
|
|
}
|