add term

term/Cargo.toml

@@ -0,0 +1,13 @@
+[package]
+name = "term"
+version = "0.1.0"
+authors = ["Hatter Jiang <jht5945@gmail.com>"]
+edition = "2018"
+
+# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
+
+[dependencies]
+libc = "0.2.65"
+atty = "0.2.13"
+
+

term/src/main.rs

@@ -0,0 +1,18 @@
+use atty::Stream;
+
+// https://crates.io/crates/atty
+// https://rosettacode.org/wiki/Check_output_device_is_a_terminal
+fn main() {  
+    if atty::is(Stream::Stdout) {
+        println!("I'm a terminal");
+    } else {
+        println!("I'm not");
+    }
+
+    let istty = unsafe { libc::isatty(libc::STDOUT_FILENO as i32) } != 0;
+    if istty {
+        println!("stdout is tty");
+    } else {
+        println!("stdout is not tty");
+    }
+}