add wrapper binary for dnsdomainname.rs, domainname.rs, nisdomainname.rs, ypdomainname.rs

Author: Haitai Ng

src/bin/dnsdomainname.rs

@@ -0,0 +1,12 @@
+// Wrapper binary: dnsdomainname -> hostname -d
+fn main() {
+    uucore::panic::mute_sigpipe_panic();
+
+    use std::ffi::OsString;
+    use std::process;
+
+    let args = std::env::args_os().skip(1);
+    let iter = (vec![OsString::from("hostname"), OsString::from("-d")].into_iter()).chain(args);
+
+    process::exit(hostname::uumain(iter));
+}

src/bin/domainname.rs

@@ -0,0 +1,12 @@
+// Wrapper binary: domainname -> hostname -d
+fn main() {
+    uucore::panic::mute_sigpipe_panic();
+
+    use std::ffi::OsString;
+    use std::process;
+
+    let args = std::env::args_os().skip(1);
+    let iter = (vec![OsString::from("hostname"), OsString::from("-d")].into_iter()).chain(args);
+
+    process::exit(hostname::uumain(iter));
+}

src/bin/nisdomainname.rs

@@ -0,0 +1,12 @@
+// Wrapper binary: nisdomainname -> hostname -y (visible alias)
+fn main() {
+    uucore::panic::mute_sigpipe_panic();
+
+    use std::ffi::OsString;
+    use std::process;
+
+    let args = std::env::args_os().skip(1);
+    let iter = (vec![OsString::from("hostname"), OsString::from("-y")].into_iter()).chain(args);
+
+    process::exit(hostname::uumain(iter));
+}

src/bin/ypdomainname.rs

@@ -0,0 +1,12 @@
+// Wrapper binary: ypdomainname -> hostname -y
+fn main() {
+    uucore::panic::mute_sigpipe_panic();
+
+    use std::ffi::OsString;
+    use std::process;
+
+    let args = std::env::args_os().skip(1);
+    let iter = (vec![OsString::from("hostname"), OsString::from("-y")].into_iter()).chain(args);
+
+    process::exit(hostname::uumain(iter));
+}