You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
54 lines
1.9 KiB
Rust
54 lines
1.9 KiB
Rust
use std::io::Write;
|
|
use std::io::{stdin, stdout};
|
|
use std::io::{Error, ErrorKind};
|
|
use std::process::Command;
|
|
fn main() {
|
|
println!("Hello! Welcome to Myshell");
|
|
loop {
|
|
print!("$ ");
|
|
stdout().flush().unwrap();
|
|
let mut user_input = String::new();
|
|
stdin()
|
|
.read_line(&mut user_input)
|
|
.expect("Unable to read user input");
|
|
let command_to_execute = user_input.trim();
|
|
let command_args: Vec<&str> = command_to_execute.split_whitespace().collect();
|
|
|
|
if command_args.len() > 0 {
|
|
let child = match command_args[0] {
|
|
"show" if command_args.len() > 1 => match command_args[1] {
|
|
"files" => Command::new("ls").args(&command_args[2..]).spawn(),
|
|
|
|
"process" => Command::new("ps").args(&command_args[2..]).spawn(),
|
|
|
|
_ => Err(Error::new(
|
|
ErrorKind::InvalidInput,
|
|
"please enter valid command",
|
|
)),
|
|
},
|
|
"show" if command_args.len() == 1 => Err(Error::new(
|
|
ErrorKind::InvalidInput,
|
|
"please enter valid command",
|
|
)),
|
|
"quit" => std::process::exit(0),
|
|
_ => Command::new(command_args[0])
|
|
.args(&command_args[1..])
|
|
.spawn(),
|
|
};
|
|
match child {
|
|
Ok(mut child) => {
|
|
if !child.wait().unwrap().success() {
|
|
println!("\n{}", "Child process failed")
|
|
}
|
|
}
|
|
Err(e) => match e.kind() {
|
|
ErrorKind::InvalidInput => eprintln!(
|
|
"Sorry, show command only supports following options: files , process "
|
|
),
|
|
_ => eprintln!("Please enter a valid command"),
|
|
},
|
|
}
|
|
}
|
|
}
|
|
}
|