Initial STD support for Cygwin

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

Author: Berrysoft

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;