fix(redox/build): missing unsafe blocks

This change was made, commited, pushed and tested entirely on Redox :^)
Signed-off-by: Anhad Singh <andypython@protonmail.com>

src/header/pty/redox.rs

@@ -6,7 +6,7 @@ use crate::{
 };
 
 pub(super) unsafe fn openpty(name: &mut [u8]) -> Result<(c_int, c_int), ()> {
-    let master = fcntl::open(c"/scheme/pty".as_ptr(), fcntl::O_RDWR, 0);
+    let master = unsafe { fcntl::open(c"/scheme/pty".as_ptr(), fcntl::O_RDWR, 0) };
     if master < 0 {
         return Err(());
     }
@@ -21,7 +21,7 @@ pub(super) unsafe fn openpty(name: &mut [u8]) -> Result<(c_int, c_int), ()> {
     }
     name[count as usize] = 0;
 
-    let slave = fcntl::open(name.as_ptr() as *const c_char, fcntl::O_RDWR, 0);
+    let slave = unsafe { fcntl::open(name.as_ptr() as *const c_char, fcntl::O_RDWR, 0) };
     if slave < 0 {
         unistd::close(master);
         return Err(());

src/header/stdlib/mod.rs

@@ -925,7 +925,7 @@ pub unsafe extern "C" fn posix_memalign(
 #[unsafe(no_mangle)]
 pub unsafe extern "C" fn posix_openpt(flags: c_int) -> c_int {
     #[cfg(target_os = "redox")]
-    let r = open((b"/scheme/pty\0" as *const u8).cast(), O_CREAT);
+    let r = unsafe { open((b"/scheme/pty\0" as *const u8).cast(), O_CREAT) };
 
     #[cfg(target_os = "linux")]
     let r = unsafe { open((b"/dev/ptmx\0" as *const u8).cast(), flags) };
@@ -963,10 +963,10 @@ pub unsafe extern "C" fn ptsname_r(fd: c_int, buf: *mut c_char, buflen: size_t)
 #[cfg(target_os = "redox")]
 #[inline(always)]
 unsafe fn __ptsname_r(fd: c_int, buf: *mut c_char, buflen: size_t) -> c_int {
-    let tty_ptr = unistd::ttyname(fd);
+    let tty_ptr = unsafe { unistd::ttyname(fd) };
 
     if !tty_ptr.is_null() {
-        if let Ok(name) = CStr::from_ptr(tty_ptr).to_str() {
+        if let Ok(name) = unsafe { CStr::from_ptr(tty_ptr) }.to_str() {
             let len = name.len();
             if len > buflen {
                 platform::ERRNO.set(ERANGE);
@@ -975,7 +975,9 @@ unsafe fn __ptsname_r(fd: c_int, buf: *mut c_char, buflen: size_t) -> c_int {
                 // we have checked the string will fit in the buffer
                 // so can use strcpy safely
                 let s = name.as_ptr().cast();
-                ptr::copy_nonoverlapping(s, buf, len);
+                unsafe {
+                    ptr::copy_nonoverlapping(s, buf, len);
+                }
                 return 0;
             }
         }

src/platform/mod.rs

@@ -338,7 +338,9 @@ pub unsafe fn init(auxvs: Box<[[usize; 2]]>) {
     let Some(proc_fd) = get_auxv(&auxvs, AT_REDOX_PROC_FD) else {
         panic!("Missing proc and thread fd!");
     };
-    redox_rt::initialize(FdGuard::new(proc_fd).to_upper().unwrap());
+    unsafe {
+        redox_rt::initialize(FdGuard::new(proc_fd).to_upper().unwrap());
+    }
 
     // TODO: Is it safe to assume setup_sighandler has been called at this point?
     redox_rt::sys::this_proc_call(
@@ -352,7 +354,8 @@ pub unsafe fn init(auxvs: Box<[[usize; 2]]>) {
         get_auxv(&auxvs, AT_REDOX_INITIAL_CWD_PTR),
         get_auxv(&auxvs, AT_REDOX_INITIAL_CWD_LEN),
     ) {
-        let cwd_bytes: &'static [u8] = core::slice::from_raw_parts(cwd_ptr as *const u8, cwd_len);
+        let cwd_bytes: &'static [u8] = 
+            unsafe { core::slice::from_raw_parts(cwd_ptr as *const u8, cwd_len) };
         if let Ok(cwd) = core::str::from_utf8(cwd_bytes) {
             self::sys::path::set_cwd_manual(cwd.into());
         }

src/platform/redox/mod.rs

@@ -1,3 +1,5 @@
+#![allow(unsafe_op_in_unsafe_fn)]
+
 use core::{
     convert::TryFrom,
     mem::{self, MaybeUninit, size_of},

src/pthread/mod.rs

@@ -226,7 +226,9 @@ unsafe extern "C" fn new_thread_shim(
     {
         // `thr_fd` in `tcb` is set by [`Sys::rlct_clone`] *before* jumping to
         // the entry point of the new thread.
-        tcb.activate(None);
+        unsafe {
+            tcb.activate(None);
+        }
         redox_rt::signal::setup_sighandler(&tcb.os_specific, false);
     }
 

src/start.rs

@@ -154,8 +154,10 @@ pub unsafe extern "C" fn relibc_start_v1(
 
     #[cfg(target_os = "redox")]
     let thr_fd = redox_rt::proc::FdGuard::new(
-        crate::platform::get_auxv_raw(sp.auxv().cast(), redox_rt::auxv_defs::AT_REDOX_THR_FD)
-            .expect_notls("no thread fd present"),
+        unsafe {
+            crate::platform::get_auxv_raw(sp.auxv().cast(), redox_rt::auxv_defs::AT_REDOX_THR_FD)
+        }
+        .expect_notls("no thread fd present"),
     )
     .to_upper()
     .expect_notls("failed to move thread fd to upper table");