draft of pwdx

src/uu/pwdx/Cargo.toml

@@ -0,0 +1,12 @@
+[package]
+name = "uu_pwdx"
+version = "0.0.1"
+edition = "2021"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+
+[[bin]]
+name = "pwdx"
+path = "src/pwdx.rs"

src/uu/pwdx/src/pwdx.rs

@@ -0,0 +1,24 @@
+use std::env;
+use std::fs;
+use std::path::Path;
+use std::process;
+
+fn main() {
+    let args: Vec<String> = env::args().collect();
+
+    if args.len() != 2 {
+        eprintln!("Usage: pwdx <pid>");
+        process::exit(1);
+    }
+
+    let pid = &args[1];
+    let cwd_link = format!("/proc/{}/cwd", pid);
+
+    match fs::read_link(Path::new(&cwd_link)) {
+        Ok(path) => println!("{}: {}", pid, path.display()),
+        Err(e) => {
+            eprintln!("pwdx: failed to read link for PID {}: {}", pid, e);
+            process::exit(1);
+        }
+    }
+}