Add basic redirection support

src/main.rs

@@ -1,5 +1,5 @@
 use std::{
-    env::{current_dir, set_current_dir}, io::{self, Write}, path::PathBuf, process::Command
+    env::{current_dir, set_current_dir}, fs::File, io::{self, Write}, path::PathBuf, process::Command,
 };
 
 use clap::Parser;
@@ -31,10 +31,21 @@ fn main() {
         if line.is_empty() {
             continue;
         }
-        let Some(cmd) = shlex::split(line) else {
+        let Some(mut cmd) = shlex::split(line) else {
             println!("Syntax error");
             continue;
         };
+        let redirect = if cmd.len() >= 3 {
+            if cmd[cmd.len() - 2] == ">" {
+                let redirect = cmd.pop().unwrap();
+                cmd.pop();
+                Some(redirect)
+            } else {
+                None
+            }
+        } else {
+            None
+        };
         match cmd[0].as_str() {
             "pwd" => println!("{}", current_dir().unwrap().to_string_lossy()),
             "cd" => {
@@ -69,7 +80,19 @@ fn main() {
                 } else {
                     format!("/bin/{}", cmd[0])
                 };
-                let mut proc = match Command::new(path).args(&cmd[1..]).spawn() {
+                let mut command = Command::new(path);
+                command.args(&cmd[1..]);
+                if let Some(redirect) = redirect {
+                    let redirect = match File::create(&redirect) {
+                        Ok(x) => x,
+                        Err(e) => {
+                            println!("psh: {}: {}", redirect, e);
+                            continue;
+                        }
+                    };
+                    command.stdout(redirect);
+                }
+                let mut proc = match command.spawn() {
                     Ok(x) => x,
                     Err(e) => {
                         println!("psh: {}: {}", cmd[0], e);