src/proc/bin/starnix/fs/mod.rs

// Copyright 2021 The Fuchsia Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

mod fd;
mod fidl_file;
pub use fd::*;
pub use fidl_file::*;

use std::sync::Arc;
use log::info;

use crate::types::*;
use crate::ThreadContext;

// misc

#[derive(FileDesc)]
pub struct StdioFile {
    common: FileCommon,
}

impl StdioFile {
    pub fn new() -> FdHandle {
        Arc::new(StdioFile { common: FileCommon::default() })
    }
}

impl FileDesc for StdioFile {
    fn write(&self, ctx: &ThreadContext, data: &[iovec]) -> Result<usize, Errno> {
        let mut size = 0;
        for vec in data {
            let mut local = vec![0; vec.iov_len];
            ctx.process.read_memory(vec.iov_base, &mut local)?;
            info!(target: "stdio", "{}", String::from_utf8_lossy(&local));
            size += vec.iov_len;
        }
        Ok(size)
    }

    fn read(&self, _ctx: &ThreadContext, _offset: &mut usize, _data: &[iovec]) -> Result<usize, Errno> {
        Ok(0)
    }

    fn fstat(&self, ctx: &ThreadContext) -> Result<stat_t, Errno> {
        Ok(stat_t {
            st_dev: 0x16,
            st_ino: 3,
            st_nlink: 1,
            st_mode: 0x2190,
            st_uid: ctx.process.security.uid,
            st_gid: ctx.process.security.gid,
            st_rdev: 0x8800,
            ..stat_t::default()
        })
    }
}