Initial STD support for Cygwin

Signed-off-by: Ookiineko <chiisaineko@protonmail.com>

library/rtstartup/rsbegin.rs

@@ -49,7 +49,7 @@ pub unsafe fn drop_in_place<T: ?Sized>(to_drop: *mut T) {
 // enumerating currently loaded modules via the dl_iterate_phdr() API and
 // finding their ".eh_frame" sections); Others, like Windows, require modules
 // to actively register their unwind info sections via unwinder API.
-#[cfg(all(target_os = "windows", target_arch = "x86", target_env = "gnu"))]
+#[cfg(all(any(target_os = "cygwin", all(target_os = "windows", target_env = "gnu")), target_arch = "x86"))]
 pub mod eh_frames {
     #[no_mangle]
     #[unsafe(link_section = ".eh_frame")]

library/rtstartup/rsend.rs

@@ -27,7 +27,7 @@ pub unsafe fn drop_in_place<T: ?Sized>(to_drop: *mut T) {
     drop_in_place(to_drop);
 }
 
-#[cfg(all(target_os = "windows", target_arch = "x86", target_env = "gnu"))]
+#[cfg(all(any(target_os = "cygwin", all(target_os = "windows", target_env = "gnu")), target_arch = "x86"))]
 pub mod eh_frames {
     // Terminate the frame unwind info section with a 0 as a sentinel;
     // this would be the 'length' field in a real FDE.

library/std/build.rs

@@ -61,6 +61,7 @@ fn main() {
         || target_os == "zkvm"
         || target_os == "rtems"
         || target_os == "nuttx"
+        || target_os == "cygwin"
 
         // See src/bootstrap/src/core/build_steps/synthetic_targets.rs
         || env::var("RUSTC_BOOTSTRAP_SYNTHETIC_TARGET").is_ok()

library/std/src/os/cygwin/fs.rs

@@ -0,0 +1,122 @@
+#![stable(feature = "metadata_ext", since = "1.1.0")]
+use crate::fs::Metadata;
+#[allow(deprecated)]
+use crate::os::cygwin::raw;
+use crate::sys_common::AsInner;
+/// OS-specific extensions to [`fs::Metadata`].
+///
+/// [`fs::Metadata`]: crate::fs::Metadata
+#[stable(feature = "metadata_ext", since = "1.1.0")]
+pub trait MetadataExt {
+    /// Gain a reference to the underlying `stat` structure which contains
+    /// the raw information returned by the OS.
+    ///
+    /// The contents of the returned `stat` are **not** consistent across
+    /// Unix platforms. The `os::unix::fs::MetadataExt` trait contains the
+    /// cross-Unix abstractions contained within the raw stat.
+    #[stable(feature = "metadata_ext", since = "1.1.0")]
+    #[deprecated(
+        since = "1.8.0",
+        note = "deprecated in favor of the accessor \
+                methods of this trait"
+    )]
+    #[allow(deprecated)]
+    fn as_raw_stat(&self) -> &raw::stat;
+    #[stable(feature = "metadata_ext2", since = "1.8.0")]
+    fn st_dev(&self) -> u64;
+    #[stable(feature = "metadata_ext2", since = "1.8.0")]
+    fn st_ino(&self) -> u64;
+    #[stable(feature = "metadata_ext2", since = "1.8.0")]
+    fn st_mode(&self) -> u32;
+    #[stable(feature = "metadata_ext2", since = "1.8.0")]
+    fn st_nlink(&self) -> u64;
+    #[stable(feature = "metadata_ext2", since = "1.8.0")]
+    fn st_uid(&self) -> u32;
+    #[stable(feature = "metadata_ext2", since = "1.8.0")]
+    fn st_gid(&self) -> u32;
+    #[stable(feature = "metadata_ext2", since = "1.8.0")]
+    fn st_rdev(&self) -> u64;
+    #[stable(feature = "metadata_ext2", since = "1.8.0")]
+    fn st_size(&self) -> u64;
+    #[stable(feature = "metadata_ext2", since = "1.8.0")]
+    fn st_atime(&self) -> i64;
+    #[stable(feature = "metadata_ext2", since = "1.8.0")]
+    fn st_atime_nsec(&self) -> i64;
+    #[stable(feature = "metadata_ext2", since = "1.8.0")]
+    fn st_mtime(&self) -> i64;
+    #[stable(feature = "metadata_ext2", since = "1.8.0")]
+    fn st_mtime_nsec(&self) -> i64;
+    #[stable(feature = "metadata_ext2", since = "1.8.0")]
+    fn st_ctime(&self) -> i64;
+    #[stable(feature = "metadata_ext2", since = "1.8.0")]
+    fn st_ctime_nsec(&self) -> i64;
+    #[stable(feature = "metadata_ext2", since = "1.8.0")]
+    fn st_blksize(&self) -> u64;
+    #[stable(feature = "metadata_ext2", since = "1.8.0")]
+    fn st_blocks(&self) -> u64;
+    #[stable(feature = "metadata_ext2", since = "1.8.0")]
+    fn st_birthtime(&self) -> i64;
+    #[stable(feature = "metadata_ext2", since = "1.8.0")]
+    fn st_birthtime_nsec(&self) -> i64;
+}
+#[stable(feature = "metadata_ext", since = "1.1.0")]
+impl MetadataExt for Metadata {
+    #[allow(deprecated)]
+    fn as_raw_stat(&self) -> &raw::stat {
+        unsafe { &*(self.as_inner().as_inner() as *const libc::stat as *const raw::stat) }
+    }
+    fn st_dev(&self) -> u64 {
+        self.as_inner().as_inner().st_dev as u64
+    }
+    fn st_ino(&self) -> u64 {
+        self.as_inner().as_inner().st_ino as u64
+    }
+    fn st_mode(&self) -> u32 {
+        self.as_inner().as_inner().st_mode as u32
+    }
+    fn st_nlink(&self) -> u64 {
+        self.as_inner().as_inner().st_nlink as u64
+    }
+    fn st_uid(&self) -> u32 {
+        self.as_inner().as_inner().st_uid as u32
+    }
+    fn st_gid(&self) -> u32 {
+        self.as_inner().as_inner().st_gid as u32
+    }
+    fn st_rdev(&self) -> u64 {
+        self.as_inner().as_inner().st_rdev as u64
+    }
+    fn st_size(&self) -> u64 {
+        self.as_inner().as_inner().st_size as u64
+    }
+    fn st_atime(&self) -> i64 {
+        self.as_inner().as_inner().st_atime as i64
+    }
+    fn st_atime_nsec(&self) -> i64 {
+        self.as_inner().as_inner().st_atime_nsec as i64
+    }
+    fn st_mtime(&self) -> i64 {
+        self.as_inner().as_inner().st_mtime as i64
+    }
+    fn st_mtime_nsec(&self) -> i64 {
+        self.as_inner().as_inner().st_mtime_nsec as i64
+    }
+    fn st_ctime(&self) -> i64 {
+        self.as_inner().as_inner().st_ctime as i64
+    }
+    fn st_ctime_nsec(&self) -> i64 {
+        self.as_inner().as_inner().st_ctime_nsec as i64
+    }
+    fn st_blksize(&self) -> u64 {
+        self.as_inner().as_inner().st_blksize as u64
+    }
+    fn st_blocks(&self) -> u64 {
+        self.as_inner().as_inner().st_blocks as u64
+    }
+    fn st_birthtime(&self) -> i64 {
+        self.as_inner().as_inner().st_birthtime as i64
+    }
+    fn st_birthtime_nsec(&self) -> i64 {
+        self.as_inner().as_inner().st_birthtime_nsec as i64
+    }
+}

library/std/src/os/cygwin/mod.rs

@@ -0,0 +1,4 @@
+//! Cygwin-specific definitions
+#![stable(feature = "raw_ext", since = "1.1.0")]
+pub mod fs;
+pub mod raw;

library/std/src/os/cygwin/raw.rs

@@ -0,0 +1,70 @@
+//! Cygwin-specific raw type definitions
+#![stable(feature = "raw_ext", since = "1.1.0")]
+#![deprecated(
+    since = "1.8.0",
+    note = "these type aliases are no longer supported by \
+            the standard library, the `libc` crate on \
+            crates.io should be used instead for the correct \
+            definitions"
+)]
+#![allow(deprecated)]
+use crate::os::raw::{c_long, c_void};
+#[stable(feature = "raw_ext", since = "1.1.0")]
+pub type blkcnt_t = i64;
+#[stable(feature = "raw_ext", since = "1.1.0")]
+pub type blksize_t = i32;
+#[stable(feature = "raw_ext", since = "1.1.0")]
+pub type dev_t = u32;
+#[stable(feature = "raw_ext", since = "1.1.0")]
+pub type ino_t = u64;
+#[stable(feature = "raw_ext", since = "1.1.0")]
+pub type mode_t = u32;
+#[stable(feature = "raw_ext", since = "1.1.0")]
+pub type nlink_t = u16;
+#[stable(feature = "raw_ext", since = "1.1.0")]
+pub type off_t = i64;
+#[stable(feature = "raw_ext", since = "1.1.0")]
+pub type time_t = i64;
+#[stable(feature = "pthread_t", since = "1.8.0")]
+pub type pthread_t = *mut c_void;
+#[repr(C)]
+#[derive(Clone)]
+#[stable(feature = "raw_ext", since = "1.1.0")]
+pub struct stat {
+    #[stable(feature = "raw_ext", since = "1.1.0")]
+    pub st_dev: dev_t,
+    #[stable(feature = "raw_ext", since = "1.1.0")]
+    pub st_ino: ino_t,
+    #[stable(feature = "raw_ext", since = "1.1.0")]
+    pub st_mode: mode_t,
+    #[stable(feature = "raw_ext", since = "1.1.0")]
+    pub st_nlink: nlink_t,
+    #[stable(feature = "raw_ext", since = "1.1.0")]
+    pub st_uid: u32,
+    #[stable(feature = "raw_ext", since = "1.1.0")]
+    pub st_gid: u32,
+    #[stable(feature = "raw_ext", since = "1.1.0")]
+    pub st_rdev: dev_t,
+    #[stable(feature = "raw_ext", since = "1.1.0")]
+    pub st_size: off_t,
+    #[stable(feature = "raw_ext", since = "1.1.0")]
+    pub st_atime: time_t,
+    #[stable(feature = "raw_ext", since = "1.1.0")]
+    pub st_atime_nsec: c_long,
+    #[stable(feature = "raw_ext", since = "1.1.0")]
+    pub st_mtime: time_t,
+    #[stable(feature = "raw_ext", since = "1.1.0")]
+    pub st_mtime_nsec: c_long,
+    #[stable(feature = "raw_ext", since = "1.1.0")]
+    pub st_ctime: time_t,
+    #[stable(feature = "raw_ext", since = "1.1.0")]
+    pub st_ctime_nsec: c_long,
+    #[stable(feature = "raw_ext", since = "1.1.0")]
+    pub st_blksize: blksize_t,
+    #[stable(feature = "raw_ext", since = "1.1.0")]
+    pub st_blocks: blkcnt_t,
+    #[stable(feature = "raw_ext", since = "1.1.0")]
+    pub st_birthtime: time_t,
+    #[stable(feature = "raw_ext", since = "1.1.0")]
+    pub st_birthtime_nsec: c_long,
+}

library/std/src/os/mod.rs

@@ -125,6 +125,8 @@ pub mod windows;
 pub mod aix;
 #[cfg(target_os = "android")]
 pub mod android;
+#[cfg(target_os = "cygwin")]
+pub mod cygwin;
 #[cfg(target_os = "dragonfly")]
 pub mod dragonfly;
 #[cfg(target_os = "emscripten")]

library/std/src/os/unix/mod.rs

@@ -41,6 +41,8 @@ mod platform {
     pub use crate::os::aix::*;
     #[cfg(target_os = "android")]
     pub use crate::os::android::*;
+    #[cfg(target_os = "cygwin")]
+    pub use crate::os::cygwin::*;
     #[cfg(target_vendor = "apple")]
     pub use crate::os::darwin::*;
     #[cfg(target_os = "dragonfly")]

library/std/src/os/unix/net/datagram.rs

@@ -9,6 +9,7 @@
     target_os = "illumos",
     target_os = "haiku",
     target_os = "nto",
+    target_os = "cygwin"
 ))]
 use libc::MSG_NOSIGNAL;
 
@@ -37,6 +38,7 @@ use crate::{fmt, io};
     target_os = "illumos",
     target_os = "haiku",
     target_os = "nto",
+    target_os = "cygwin"
 )))]
 const MSG_NOSIGNAL: core::ffi::c_int = 0x0;
 

library/std/src/os/unix/net/mod.rs

@@ -21,6 +21,7 @@ mod tests;
     target_os = "openbsd",
     target_os = "nto",
     target_vendor = "apple",
+    target_os = "cygwin"
 ))]
 mod ucred;
 

library/std/src/os/unix/net/stream.rs

@@ -10,6 +10,7 @@ use super::{SocketAncillary, recv_vectored_with_ancillary_from, send_vectored_wi
     target_os = "openbsd",
     target_os = "nto",
     target_vendor = "apple",
+    target_os = "cygwin"
 ))]
 use super::{UCred, peer_cred};
 use crate::fmt;
@@ -231,6 +232,7 @@ impl UnixStream {
         target_os = "openbsd",
         target_os = "nto",
         target_vendor = "apple",
+        target_os = "cygwin"
     ))]
     pub fn peer_cred(&self) -> io::Result<UCred> {
         peer_cred(self)

library/std/src/os/unix/net/ucred.rs

@@ -33,10 +33,10 @@ pub(super) use self::impl_apple::peer_cred;
     target_os = "nto"
 ))]
 pub(super) use self::impl_bsd::peer_cred;
-#[cfg(any(target_os = "android", target_os = "linux"))]
+#[cfg(any(target_os = "android", target_os = "linux", target_os = "cygwin"))]
 pub(super) use self::impl_linux::peer_cred;
 
-#[cfg(any(target_os = "linux", target_os = "android"))]
+#[cfg(any(target_os = "linux", target_os = "android", target_os = "cygwin"))]
 mod impl_linux {
     use libc::{SO_PEERCRED, SOL_SOCKET, c_void, getsockopt, socklen_t, ucred};
 

library/std/src/sys/fs/unix.rs

@@ -543,7 +543,7 @@ impl FileAttr {
         SystemTime::new(self.stat.st_atim.tv_sec as i64, self.stat.st_atim.tv_nsec as i64)
     }
 
-    #[cfg(any(target_os = "freebsd", target_os = "openbsd", target_vendor = "apple"))]
+    #[cfg(any(target_os = "freebsd", target_os = "openbsd", target_vendor = "apple", target_os = "cygwin"))]
     pub fn created(&self) -> io::Result<SystemTime> {
         SystemTime::new(self.stat.st_birthtime as i64, self.stat.st_birthtime_nsec as i64)
     }
@@ -553,6 +553,7 @@ impl FileAttr {
         target_os = "openbsd",
         target_os = "vita",
         target_vendor = "apple",
+        target_os = "cygwin",
     )))]
     pub fn created(&self) -> io::Result<SystemTime> {
         cfg_has_statx! {
@@ -960,6 +961,7 @@ impl DirEntry {
 
     #[cfg(any(
         target_os = "linux",
+        target_os = "cygwin",
         target_os = "emscripten",
         target_os = "android",
         target_os = "solaris",
@@ -1220,6 +1222,7 @@ impl File {
             target_os = "freebsd",
             target_os = "fuchsia",
             target_os = "linux",
+            target_os = "cygwin",
             target_os = "android",
             target_os = "netbsd",
             target_os = "openbsd",
@@ -1234,6 +1237,7 @@ impl File {
             target_os = "fuchsia",
             target_os = "freebsd",
             target_os = "linux",
+            target_os = "cygwin",
             target_os = "netbsd",
             target_os = "openbsd",
             target_os = "nto",

library/std/src/sys/net/connection/socket.rs

@@ -59,7 +59,8 @@ cfg_if::cfg_if! {
         target_os = "dragonfly", target_os = "freebsd",
         target_os = "openbsd", target_os = "netbsd",
         target_os = "solaris", target_os = "illumos",
-        target_os = "haiku", target_os = "nto"))] {
+        target_os = "haiku", target_os = "nto",
+        target_os = "cygwin"))] {
         use libc::MSG_NOSIGNAL;
     } else {
         const MSG_NOSIGNAL: c_int = 0x0;

library/std/src/sys/net/connection/socket/unix.rs

@@ -81,6 +81,7 @@ impl Socket {
                     target_os = "linux",
                     target_os = "netbsd",
                     target_os = "openbsd",
+                    target_os = "cygwin",
                     target_os = "nto",
                     target_os = "solaris",
                 ))] {
@@ -128,6 +129,7 @@ impl Socket {
                     target_os = "hurd",
                     target_os = "netbsd",
                     target_os = "openbsd",
+                    target_os = "cygwin",
                     target_os = "nto",
                 ))] {
                     // Like above, set cloexec atomically
@@ -257,6 +259,7 @@ impl Socket {
                 target_os = "hurd",
                 target_os = "netbsd",
                 target_os = "openbsd",
+                target_os = "cygwin",
             ))] {
                 unsafe {
                     let fd = cvt_r(|| libc::accept4(self.as_raw_fd(), storage, len, libc::SOCK_CLOEXEC))?;

library/std/src/sys/pal/unix/args.rs

@@ -100,6 +100,7 @@ impl DoubleEndedIterator for Args {
     target_os = "dragonfly",
     target_os = "netbsd",
     target_os = "openbsd",
+    target_os = "cygwin",
     target_os = "solaris",
     target_os = "illumos",
     target_os = "emscripten",

library/std/src/sys/pal/unix/env.rs

@@ -108,6 +108,17 @@ pub mod os {
     pub const EXE_EXTENSION: &str = "";
 }
 
+#[cfg(target_os = "cygwin")]
+pub mod os {
+    pub const FAMILY: &str = "unix";
+    pub const OS: &str = "cygwin";
+    pub const DLL_PREFIX: &str = "";
+    pub const DLL_SUFFIX: &str = ".dll";
+    pub const DLL_EXTENSION: &str = "dll";
+    pub const EXE_SUFFIX: &str = ".exe";
+    pub const EXE_EXTENSION: &str = "exe";
+}
+
 #[cfg(target_os = "android")]
 pub mod os {
     pub const FAMILY: &str = "unix";