4 files changed, 127 insertions, 0 deletions
diff --git a/third_party/rust/termion/src/sys/unix/attr.rs b/third_party/rust/termion/src/sys/unix/attr.rs
new file mode 100644
index 0000000000..5e21fbac8e
--- /dev/null
+++ b/third_party/rust/termion/src/sys/unix/attr.rs
@@ -0,0 +1,29 @@
+use std::{io, mem};
+
+use super::{cvt, Termios};
+use super::libc::c_int;
+
+pub fn get_terminal_attr() -> io::Result<Termios> {
+    extern "C" {
+        pub fn tcgetattr(fd: c_int, termptr: *mut Termios) -> c_int;
+    }
+    unsafe {
+        let mut termios = mem::zeroed();
+        cvt(tcgetattr(0, &mut termios))?;
+        Ok(termios)
+    }
+}
+
+pub fn set_terminal_attr(termios: &Termios) -> io::Result<()> {
+    extern "C" {
+        pub fn tcsetattr(fd: c_int, opt: c_int, termptr: *const Termios) -> c_int;
+    }
+    cvt(unsafe { tcsetattr(0, 0, termios) }).and(Ok(()))
+}
+
+pub fn raw_terminal_attr(termios: &mut Termios) {
+    extern "C" {
+        pub fn cfmakeraw(termptr: *mut Termios);
+    }
+    unsafe { cfmakeraw(termios) }
+}
diff --git a/third_party/rust/termion/src/sys/unix/mod.rs b/third_party/rust/termion/src/sys/unix/mod.rs
new file mode 100644
index 0000000000..08d73feb12
--- /dev/null
+++ b/third_party/rust/termion/src/sys/unix/mod.rs
@@ -0,0 +1,33 @@
+extern crate libc;
+
+use std::io;
+
+pub use self::libc::termios as Termios;
+
+pub mod attr;
+pub mod size;
+pub mod tty;
+
+// Support functions for converting libc return values to io errors {
+trait IsMinusOne {
+    fn is_minus_one(&self) -> bool;
+}
+
+macro_rules! impl_is_minus_one {
+        ($($t:ident)*) => ($(impl IsMinusOne for $t {
+            fn is_minus_one(&self) -> bool {
+                *self == -1
+            }
+        })*)
+    }
+
+impl_is_minus_one! { i8 i16 i32 i64 isize }
+
+fn cvt<T: IsMinusOne>(t: T) -> io::Result<T> {
+    if t.is_minus_one() {
+        Err(io::Error::last_os_error())
+    } else {
+        Ok(t)
+    }
+}
+// } End of support functions
diff --git a/third_party/rust/termion/src/sys/unix/size.rs b/third_party/rust/termion/src/sys/unix/size.rs
new file mode 100644
index 0000000000..9c2aaf1a8a
--- /dev/null
+++ b/third_party/rust/termion/src/sys/unix/size.rs
@@ -0,0 +1,48 @@
+use std::{io, mem};
+
+use super::cvt;
+use super::libc::{c_ushort, ioctl, STDOUT_FILENO};
+
+#[repr(C)]
+struct TermSize {
+    row: c_ushort,
+    col: c_ushort,
+    _x: c_ushort,
+    _y: c_ushort,
+}
+
+#[cfg(target_os = "linux")]
+pub const TIOCGWINSZ: usize = 0x00005413;
+
+#[cfg(not(target_os = "linux"))]
+pub const TIOCGWINSZ: usize = 0x40087468;
+
+// Since attributes on non-item statements is not stable yet, we use a function.
+#[cfg(not(target_os = "android"))]
+#[cfg(not(target_os = "redox"))]
+#[cfg(target_pointer_width = "64")]
+#[cfg(not(target_env = "musl"))]
+fn tiocgwinsz() -> u64 {
+    TIOCGWINSZ as u64
+}
+#[cfg(not(target_os = "android"))]
+#[cfg(not(target_os = "redox"))]
+#[cfg(target_pointer_width = "32")]
+#[cfg(not(target_env = "musl"))]
+fn tiocgwinsz() -> u32 {
+    TIOCGWINSZ as u32
+}
+
+#[cfg(any(target_env = "musl", target_os = "android"))]
+fn tiocgwinsz() -> i32 {
+    TIOCGWINSZ as i32
+}
+
+/// Get the size of the terminal.
+pub fn terminal_size() -> io::Result<(u16, u16)> {
+    unsafe {
+        let mut size: TermSize = mem::zeroed();
+        cvt(ioctl(STDOUT_FILENO, tiocgwinsz(), &mut size as *mut _))?;
+        Ok((size.col as u16, size.row as u16))
+    }
+}
diff --git a/third_party/rust/termion/src/sys/unix/tty.rs b/third_party/rust/termion/src/sys/unix/tty.rs
new file mode 100644
index 0000000000..2be9363470
--- /dev/null
+++ b/third_party/rust/termion/src/sys/unix/tty.rs
@@ -0,0 +1,17 @@
+use std::{fs, io};
+use std::os::unix::io::AsRawFd;
+
+use super::libc;
+
+
+/// Is this stream a TTY?
+pub fn is_tty<T: AsRawFd>(stream: &T) -> bool {
+    unsafe { libc::isatty(stream.as_raw_fd()) == 1 }
+}
+
+/// Get the TTY device.
+///
+/// This allows for getting stdio representing _only_ the TTY, and not other streams.
+pub fn get_tty() -> io::Result<fs::File> {
+    fs::OpenOptions::new().read(true).write(true).open("/dev/tty")
+}