Update nix

Cargo.toml

@@ -10,12 +10,12 @@ categories = ["os"]
 license = "MIT/Apache-2.0"
 repository = "https://github.com/Detegr/rust-ctrlc.git"
 exclude = ["/.travis.yml", "/appveyor.yml"]
-edition = "2018"
+edition = "2021"
 readme = "README.md"
-rust-version = "1.63.0"
+rust-version = "1.69.0"
 
 [target.'cfg(unix)'.dependencies]
-nix = { version = "0.27", default-features = false, features = ["fs", "signal"]}
+nix = { version = "0.28", default-features = false, features = ["fs", "signal"]}
 
 [target.'cfg(windows)'.dependencies]
 windows-sys = { version = "0.52", features = ["Win32_Foundation", "Win32_System_Threading", "Win32_Security", "Win32_System_Console"] }

src/platform/unix/mod.rs

@@ -10,6 +10,8 @@
 use crate::error::Error as CtrlcError;
 use nix::unistd;
 use std::os::unix::io::RawFd;
+use std::os::fd::IntoRawFd;
+use std::os::fd::BorrowedFd;
 
 static mut PIPE: (RawFd, RawFd) = (-1, -1);
 
@@ -22,7 +24,8 @@ pub type Signal = nix::sys::signal::Signal;
 extern "C" fn os_handler(_: nix::libc::c_int) {
     // Assuming this always succeeds. Can't really handle errors in any meaningful way.
     unsafe {
-        let _ = unistd::write(PIPE.1, &[0u8]);
+        let fd = BorrowedFd::borrow_raw(PIPE.1);
+        let _ = unistd::write(fd, &[0u8]);
     }
 }
 
@@ -73,7 +76,8 @@ fn pipe2(flags: nix::fcntl::OFlag) -> nix::Result<(RawFd, RawFd)> {
     target_os = "nto",
 )))]
 fn pipe2(flags: nix::fcntl::OFlag) -> nix::Result<(RawFd, RawFd)> {
-    unistd::pipe2(flags)
+    let pipe = unistd::pipe2(flags)?;
+    Ok((pipe.0.into_raw_fd(), pipe.1.into_raw_fd()))
 }
 
 /// Register os signal handler.