Implemented rmdir, which fixes #37

Makefile

@@ -15,6 +15,7 @@ EXES        := \
   false \
   printenv \
   pwd \
+  rmdir \
   true \
   wc \
   whoami \

README.md

@@ -105,7 +105,6 @@ To do
 - relpath
 - remove
 - rm
-- rmdir
 - runcon
 - seq
 - setuidgid

rmdir/rmdir.rs

@@ -0,0 +1,103 @@
+#[link(name="rmdir", vers="1.0.0", author="Arcterus")];
+
+/*
+ * This file is part of the uutils coreutils package.
+ *
+ * (c) Arcterus <arcterus@mail.com>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+extern mod extra;
+
+use std::os;
+use std::io::{stderr, io_error, fs};
+use extra::getopts::groups;
+
+fn main() {
+    let args = os::args();
+    let program = args[0].clone();
+
+    let opts = ~[
+        groups::optflag("", "ignore-fail-on-non-empty", "ignore each failure that is solely because a directory is non-empty"),
+        groups::optflag("p", "parents", "remove DIRECTORY and its ancestors; e.g., 'rmdir -p a/b/c' is similar to rmdir a/b/c a/b a"),
+        groups::optflag("v", "verbose", "output a diagnostic for every directory processed"),
+        groups::optflag("", "help", "print this help and exit"),
+        groups::optflag("", "version", "output version information and exit")
+    ];
+    let matches = match groups::getopts(args.tail(), opts) {
+        Ok(m) => m,
+        Err(f) => {
+            writeln!(&mut stderr() as &mut Writer, "{}", f.to_err_msg());
+            os::set_exit_status(1);
+            return
+        }
+    };
+
+    if matches.opt_present("help") {
+        println("rmdir 1.0.0");
+        println("");
+        println("Usage:");
+        println!("  {0:s} [OPTION]... DIRECTORY...", program);
+        println("");
+        print(groups::usage("Remove the DIRECTORY(ies), if they are empty.", opts));
+    } else if matches.opt_present("version") {
+        println("rmdir 1.0.0");
+    } else if matches.free.is_empty() {
+        writeln!(&mut stderr() as &mut Writer, "Missing an argument");
+        writeln!(&mut stderr() as &mut Writer,
+                 "For help, try '{0:s} --help'", program);
+        os::set_exit_status(1);
+    } else {
+        let ignore = matches.opt_present("ignore-fail-on-non-empty");
+        let parents = matches.opt_present("parents");
+        let verbose = matches.opt_present("verbose");
+        remove(matches.free, ignore, parents, verbose);
+    }
+}
+
+fn remove(dirs: &[~str], ignore: bool, parents: bool, verbose: bool) {
+    for dir in dirs.iter() {
+        let path = Path::new(dir.to_owned());
+        if path.exists() {
+            if path.is_dir() {
+                remove_dir(&path, dir, ignore, parents, verbose);
+            } else {
+                writeln!(&mut stderr() as &mut Writer,
+                         "Failed to remove '{}' (file)", *dir);
+                os::set_exit_status(1);
+            }
+        } else {
+            writeln!(&mut stderr() as &mut Writer,
+                     "No such file or directory '{}'", *dir);
+            os::set_exit_status(1);
+        }
+    }
+}
+
+fn remove_dir(path: &Path, dir: &~str, ignore: bool, parents: bool, verbose: bool) {
+    if fs::walk_dir(path).next() == None {
+        io_error::cond.trap(|_| {
+            writeln!(&mut stderr() as &mut Writer,
+                     "Failed to remove directory '{}'", *dir);
+            os::set_exit_status(1);
+        }).inside(|| {
+            fs::rmdir(path);
+            if verbose {
+                println!("Removed directory '{}'", *dir);
+            }
+            if parents {
+                let dirname = path.dirname_str().unwrap();
+                if dirname != "." {
+                    remove_dir(&Path::new(dirname), &dirname.to_owned(), ignore, parents, verbose);
+                }
+            }
+        });
+    } else if !ignore {
+        writeln!(&mut stderr() as &mut Writer,
+                 "Failed to remove directory '{}' (non-empty)", *dir);
+        os::set_exit_status(1);
+    }
+}
+