init: Remove cd command

The working directory doesn't matter for services and login sessions
already cd to the user home directory. This removes one source of global
state manipulation.

init.d/90_exit_initfs

@@ -1,2 +1 @@
-cd /
 switchroot /usr /etc

init/src/main.rs

@@ -85,11 +85,6 @@ fn run(file: &Path, config: &InitConfig) -> Result<()> {
 fn run_command(cmd: Command, config: &InitConfig) {
     match cmd {
         Command::Nothing => {}
-        Command::Cd(dir) => {
-            if let Err(err) = env::set_current_dir(&dir) {
-                eprintln!("init: failed to cd to '{}': {}", dir.display(), err);
-            }
-        }
         Command::Echo(text) => println!("{text}"),
         Command::Export(var, value) => unsafe { env::set_var(var, value) },
         Command::SwitchRoot(prefix, etcdir) => {

init/src/script.rs

@@ -41,7 +41,6 @@ pub enum Command {
     Regular(String, Vec<String>),
 
     // Modify env
-    Cd(PathBuf),
     Stdio(String),
     Export(String, String),
     Unset(Vec<String>),
@@ -59,12 +58,6 @@ impl Command {
         };
 
         match cmd.as_str() {
-            "cd" => {
-                let Some(dir) = args.next() else {
-                    return Err("init: failed to cd: no argument".to_owned());
-                };
-                Ok(Command::Cd(PathBuf::from(dir)))
-            }
             "echo" => Ok(Command::Echo(args.collect::<Vec<_>>().join(" "))),
             "export" => {
                 let Some(var) = args.next() else {