stdlib: unlockpt implementation proposal

src/header/stdlib/mod.rs

@@ -18,6 +18,7 @@ use crate::{
         limits,
         stdio::flush_io_streams,
         string::*,
+        sys_ioctl::*,
         time::constants::CLOCK_MONOTONIC,
         unistd::{self, sysconf, _SC_PAGESIZE},
         wchar::*,
@@ -1213,8 +1214,9 @@ pub extern "C" fn ttyslot() -> c_int {
 }
 
 // #[no_mangle]
-pub extern "C" fn unlockpt(fildes: c_int) -> c_int {
-    unimplemented!();
+pub unsafe extern "C" fn unlockpt(fildes: c_int) -> c_int {
+    let mut u: c_int = 0;
+    ioctl(fildes, TIOCSPTLCK, &mut u as *mut i32 as *mut c_void)
 }
 
 #[no_mangle]

src/header/sys_ioctl/redox.rs

@@ -26,6 +26,8 @@ pub const TIOCSPGRP: c_ulong = 0x5410;
 
 pub const TIOCGWINSZ: c_ulong = 0x5413;
 pub const TIOCSWINSZ: c_ulong = 0x5414;
+pub const TIOCSPTLCK: c_ulong = 0x4004_5431;
+pub const TIOCGPTLCK: c_ulong = 0x8004_5439;
 
 // TODO: some of the structs passed as T have padding bytes, so casting to a byte slice is UB
 
@@ -133,6 +135,12 @@ pub unsafe extern "C" fn ioctl(fd: c_int, request: c_ulong, out: *mut c_void) ->
                 0
             }
         }
+        TIOCGPTLCK => {
+            0
+        },
+        TIOCSPTLCK => {
+            0
+        },
         TCSBRK => {
             // TODO
             0