48 lines
1.2 KiB
Rust
48 lines
1.2 KiB
Rust
//! Filesystem syscalls
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use scheme::Scheme;
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use super::{Error, Result};
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/// Read syscall
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pub fn read(fd: usize, buf: &mut [u8]) -> Result<usize> {
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println!("Read {}: {}", fd, buf.len());
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if let Some(file) = unsafe { &mut ::context::CONTEXT }.files.get(fd) {
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println!("{:?}", file);
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Ok(0)
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} else {
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Err(Error::BadFile)
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}
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}
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/// Write syscall
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pub fn write(fd: usize, buf: &[u8]) -> Result<usize> {
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println!("Write {}: {}", fd, buf.len());
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if let Some(file) = unsafe { &mut ::context::CONTEXT }.files.get(fd) {
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println!("{:?}: {:?}", file, ::core::str::from_utf8(buf));
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Ok(buf.len())
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} else {
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Err(Error::BadFile)
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}
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}
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/// Open syscall
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pub fn open(path: &[u8], flags: usize) -> Result<usize> {
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println!("Open {:?}: {:X}", ::core::str::from_utf8(path), flags);
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let file = unsafe { &mut ::scheme::SCHEME }.open(path, flags)?;
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if let Some(fd) = unsafe { &mut ::context::CONTEXT }.add_file(::context::file::File {
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scheme: 0,
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number: file
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}) {
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Ok(fd)
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} else {
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Err(Error::TooManyFiles)
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}
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}
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/// Close syscall
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pub fn close(fd: usize) -> Result<usize> {
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println!("Close {}", fd);
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Ok(0)
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}
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