Add basic shell

This commit is contained in:
pjht 2024-09-26 11:35:39 -05:00
parent 4844301a08
commit e36844be47
Signed by: pjht
GPG Key ID: CA239FC6934E6F3A
3 changed files with 415 additions and 4 deletions

323
Cargo.lock generated
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@ -2,6 +2,329 @@
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@ -4,3 +4,5 @@ version = "0.1.0"
edition = "2021"
[dependencies]
dir_rpc = { version = "0.1.0", path = "../dir_rpc" }
vfs_rpc = { version = "0.1.0", path = "../vfs/vfs_rpc" }

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@ -1,8 +1,94 @@
use std::io;
use std::{
io::{self, Write},
os::mikros::syscalls,
path::Path,
};
fn main() {
for line in io::stdin().lines() {
let line = line.unwrap();
println!("Got line on PTS: {:?}", line);
let vfs_pid = loop {
if let Some(pid) = syscalls::try_get_registered(0) {
break pid;
}
};
let vfs_client = vfs_rpc::Client::new(vfs_pid);
let mut line = String::new();
let cwd = Path::new("/").to_owned();
loop {
print!(
"[root@mikros-dev {}]$ ",
cwd.components()
.last()
.unwrap()
.as_os_str()
.to_string_lossy()
);
io::stdout().lock().flush().unwrap();
line.clear();
io::stdin().read_line(&mut line).unwrap();
let line = line.trim();
if line.is_empty() {
continue;
}
let cmd = line.split(' ').collect::<Vec<_>>();
match cmd[0] {
"pwd" => println!("{}", cwd.to_string_lossy()),
"ls" => {
let mut path = if cmd.len() > 1 {
Path::new(cmd[1]).to_owned()
} else {
cwd.clone()
};
if path.is_relative() {
let mut abs_path = cwd.clone();
abs_path.push(path);
path = abs_path;
}
let Ok((fs_pid, dir_fd)) = vfs_client.open_dir(&path) else {
println!("psh: {}: failed to open", path.to_string_lossy());
continue;
};
let fs_client = dir_rpc::Client::new(fs_pid);
while let Some(entry) = fs_client.next_entry(dir_fd).unwrap() {
println!("{}", entry);
}
}
"cat" => {
if cmd.len() < 2 {
println!("Usage: cat <file>");
continue;
}
let mut path = Path::new(cmd[1]).to_owned();
if path.is_relative() {
let mut abs_path = cwd.clone();
abs_path.push(path);
path = abs_path;
}
let Ok(contents) = std::fs::read(&path) else {
println!("psh: {}: failed to read", path.to_string_lossy());
continue;
};
io::stdout().lock().write_all(&contents).unwrap();
if let Some(&last_byte) = contents.last() {
if last_byte != b'\n' {
println!("%");
}
}
}
"exit" => {
break;
}
"help" => {
println!("Commands:");
println!("pwd");
println!("ls");
println!("cat");
println!("exit");
println!("help");
}
_ => println!("psh: command not found: {}", cmd[0]),
}
}
}