Merge branch 'tcsetwinsize' into 'master'

Adding tcsetwinsize

See merge request redox-os/relibc!404

src/header/sys_ioctl/mod.rs

@@ -21,6 +21,12 @@ pub struct winsize {
     ws_ypixel: c_ushort,
 }
 
+impl winsize {
+    pub fn get_row_col(&self) -> (c_ushort, c_ushort) {
+        (self.ws_row, self.ws_col)
+    }
+}
+
 pub use self::sys::*;
 
 #[cfg(target_os = "linux")]

src/header/termios/mod.rs

 //! termios implementation, following http://pubs.opengroup.org/onlinepubs/7908799/xsh/termios.h.html
 
 use crate::{
-    header::{errno, sys_ioctl},
+    header::{
+        errno,
+        sys_ioctl::{self, winsize},
+    },
     platform::{self, types::*},
 };
 
@@ -171,6 +174,11 @@ pub unsafe extern "C" fn tcsendbreak(fd: c_int, _dur: c_int) -> c_int {
     sys_ioctl::ioctl(fd, sys_ioctl::TCSBRK, 0 as *mut _)
 }
 
+#[no_mangle]
+pub unsafe extern "C" fn tcsetwinsize(fd: c_int, mut sws: winsize) -> c_int {
+    sys_ioctl::ioctl(fd, sys_ioctl::TIOCSWINSZ, &mut sws as *mut _ as *mut c_void)
+}
+
 #[no_mangle]
 pub unsafe extern "C" fn tcflow(fd: c_int, action: c_int) -> c_int {
     // non-zero duration is ignored by musl due to it being