Implement link

Makefile

@@ -21,6 +21,7 @@ PROGS       := \
   false \
   fmt \
   fold \
+  link \
   hashsum \
   mkdir \
   nl \

link/link.rs

@@ -0,0 +1,67 @@
+#![crate_id(name="link", vers="1.0.0", author="Michael Gehring")]
+#![feature(macro_rules)]
+
+/*
+ * This file is part of the uutils coreutils package.
+ *
+ * (c) Michael Gehring <mg@ebfe.org>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+extern crate getopts;
+
+use std::io::fs::link;
+use std::os;
+use std::path::Path;
+
+#[path="../common/util.rs"]
+mod util;
+
+static NAME : &'static str = "link";
+static VERSION : &'static str = "1.0.0";
+
+#[allow(dead_code)]
+fn main() { os::set_exit_status(uumain(os::args())); }
+
+pub fn uumain(args: Vec<String>) -> int {
+    let opts = [
+        getopts::optflag("h", "help", "display this help and exit"),
+        getopts::optflag("V", "version", "output version information and exit"),
+    ];
+
+    let matches = match getopts::getopts(args.tail(), opts) {
+        Ok(m) => m,
+        Err(err) => fail!("{}", err),
+    };
+
+    if matches.opt_present("version") {
+        println!("{} {}", NAME, VERSION);
+        return 0;
+    }
+
+    if matches.opt_present("help") || matches.free.len() != 2 {
+        println!("{} {}", NAME, VERSION);
+        println!("");
+        println!("Usage:");
+        println!("  {} [OPTIONS] FILE1 FILE2", NAME);
+        println!("");
+        print!("{}", getopts::usage("Create a link named FILE2 to FILE1.", opts.as_slice()).as_slice());
+        if matches.free.len() != 2 {
+            return 1;
+        }
+        return 0;
+    }
+
+    let old = Path::new(matches.free.get(0).as_slice());
+    let new = Path::new(matches.free.get(1).as_slice());
+
+    match link(&old, &new) {
+        Ok(_) => 0,
+        Err(err) => {
+            show_error!("{}", err);
+            1
+        }
+    }
+}

uutils/uutils.rs

@@ -31,6 +31,7 @@ extern crate hostid;
 extern crate hostname;
 extern crate id;
 extern crate kill;
+extern crate link;
 extern crate logname;
 extern crate md5sum;
 extern crate mkdir;
@@ -92,6 +93,7 @@ fn util_map() -> HashMap<&str, fn(Vec<String>) -> int> {
     map.insert("hostname", hostname::uumain);
     map.insert("id", id::uumain);
     map.insert("kill", kill::uumain);
+    map.insert("link", link::uumain);
     map.insert("logname", logname::uumain);
     map.insert("md5sum", md5sum::uumain);
     map.insert("mkdir", mkdir::uumain);