From 09af3ecaa2ca08d22ce0d041241bcb2ca7f6bfb9 Mon Sep 17 00:00:00 2001
From: Michael Gehring <mg@ebfe.org>
Date: Sat, 18 Oct 2014 23:17:33 +0200
Subject: [PATCH] add nproc

---
 Makefile           |  1 +
 README.md          |  1 -
 src/nproc/nproc.rs | 51 ++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 52 insertions(+), 1 deletion(-)
 create mode 100644 src/nproc/nproc.rs

diff --git a/Makefile b/Makefile
index b46a86187..f6ef564c7 100644
--- a/Makefile
+++ b/Makefile
@@ -56,6 +56,7 @@ PROGS       := \
   mkdir \
   mv \
   nl \
+  nproc \
   paste \
   printenv \
   pwd \
diff --git a/README.md b/README.md
index e43146874..0ecaa96d4 100644
--- a/README.md
+++ b/README.md
@@ -144,7 +144,6 @@ To do
 - mktemp
 - mv
 - nice
-- nproc
 - numfmt
 - od
 - pathchk
diff --git a/src/nproc/nproc.rs b/src/nproc/nproc.rs
new file mode 100644
index 000000000..1212f6fa6
--- /dev/null
+++ b/src/nproc/nproc.rs
@@ -0,0 +1,51 @@
+#![crate_name = "nproc"]
+
+/*
+ * 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::os;
+
+static NAME : &'static str = "nproc";
+static VERSION : &'static str = "0.0.0";
+
+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") {
+        println!("{} {}", NAME, VERSION);
+        println!("");
+        println!("Usage:");
+        println!("  {} [OPTIONS] NAME...", NAME);
+        println!("");
+        print!("{}", getopts::usage("Print the number of cores available.", opts.as_slice()).as_slice());
+        if matches.free.is_empty() {
+            return 1;
+        }
+        return 0;
+    }
+
+    println!("{}", os::num_cpus());
+
+    return 0
+}