Fully implement pwd command

Author: morr0ne

src/bin/pwd.rs

@@ -1,14 +1,35 @@
-use std::io::{Write, stdout};
+use std::{
+    io::{Write, stdout},
+    os::unix::ffi::OsStringExt,
+    path::PathBuf,
+};
 
 use puppyutils::{Result, cli};
-use rustix::process::getcwd;
+use rustix::{fs::stat, process::getcwd};
 fn main() -> Result {
     let mut stdout = stdout();
-    cli!("pwd", stdout, #error);
 
-    let p = getcwd(Vec::new())?;
+    let mut logical = false;
 
-    stdout.write_all(p.as_bytes())?;
+    cli! {
+        "pwd", stdout, #error
+        Short('L') | Long("logical")  => logical = true
+        Short('P') | Long("physical") => logical = false
+    };
+
+    let path = if logical
+        && let Some(path) = std::env::var_os("PWD").map(PathBuf::from)
+        && path.has_root()
+        && let (Ok(pwd), Ok(dot)) = (stat(&path), stat(c"."))
+        && pwd.st_dev == dot.st_dev
+        && pwd.st_ino == dot.st_ino
+    {
+        path.into_os_string().into_vec()
+    } else {
+        getcwd(Vec::new())?.into_bytes()
+    };
+
+    stdout.write_all(&path)?;
     stdout.write_all(b"\n")?;
 
     Ok(())