Epoll, rename to nix, misc cleanup

Author: carllerche

Cargo.toml

@@ -1,5 +1,5 @@
 [package]
 
-name = "linux"
+name = "nix"
 version = "0.0.1"
 authors = ["Carl Lerche <[email protected]>"]

README.md

@@ -1,8 +1,11 @@
-# Rust bindings to Linux APIs
+# Rust bindings to *nix APIs
 
-The goal is to provide rust friendly bindings to Linux APIs. This is
-very much a work and progress and I am treating it as where I put
-bindings that I need vs. spreading them around the various libs that I
-work on.
+Rust friendly bindings to various *nix platform APIs (Linux, Darwin,
+...). The goal is to not provide a 100% unified interface, but try as
+possible as well as providing platform specific APIs. It is up to the
+consumer of this library to decide how portable they want to be.
+
+This is very much a work in progress and I'm mostly just adding bindings
+as I need them.
 
 Of course, PRs welcome :)

src/fcntl.rs

@@ -1,7 +1,8 @@
-use std::c_str::CString;
+#![cfg(target_os = "linux")]
+
 use std::path::Path;
 use std::io::FilePermission;
-use libc::{mode_t, c_int};
+use libc::c_int;
 use errno::{SysResult, SysError, from_ffi};
 
 pub type Fd = c_int;

src/lib.rs

@@ -1,4 +1,4 @@
-#![crate_name = "linux"]
+#![crate_name = "nix"]
 #![feature(globs)]
 
 extern crate libc;

src/mount.rs

@@ -1,4 +1,5 @@
-use std::c_str::CString;
+#![cfg(target_os = "linux")]
+
 use std::ptr;
 use std::path::Path;
 use libc::{c_ulong, c_int, c_void};

src/sys.rs

@@ -0,0 +1,77 @@
+#![cfg(target_os = "linux")]
+
+use libc::c_int;
+use fcntl::Fd;
+use errno::{SysResult, SysError, from_ffi};
+
+mod ffi {
+    use libc::{c_int};
+    use super::EpollEvent;
+
+    extern {
+        pub fn epoll_create(size: c_int) -> c_int;
+        pub fn epoll_ctl(epfd: c_int, op: c_int, fd: c_int, event: *const EpollEvent) -> c_int;
+        pub fn epoll_wait(epfd: c_int, events: *mut EpollEvent, max_events: c_int, timeout: c_int) -> c_int;
+    }
+}
+
+bitflags!(
+    flags EpollEventKind: u32 {
+        static EPOLLIN = 0x001,
+        static EPOLLPRI = 0x002,
+        static EPOLLOUT = 0x004,
+        static EPOLLRDNORM = 0x040,
+        static EPOLLRDBAND = 0x080,
+        static EPOLLWRNORM = 0x100,
+        static EPOLLWRBAND = 0x200,
+        static EPOLLMSG = 0x400,
+        static EPOLLERR = 0x008,
+        static EPOLLHUP = 0x010,
+        static EPOLLRDHUP = 0x2000,
+        static EPOLLWAKEUP = 1 << 29,
+        static EPOLLONESHOT = 1 << 30,
+        static EPOLLET = 1 << 31
+    }
+)
+
+#[repr(C)]
+pub enum EpollOp {
+    EpollCtlAdd = 1,
+    EpollCtlDel = 2,
+    EpollCtlMod = 3
+}
+
+pub struct EpollEvent {
+    pub events: EpollEventKind,
+    pub data: u64
+}
+
+#[inline]
+pub fn epoll_create() -> SysResult<Fd> {
+    let res = unsafe { ffi::epoll_create(1024) };
+
+    if res < 0 {
+        return Err(SysError::last());
+    }
+
+    Ok(res)
+}
+
+#[inline]
+pub fn epoll_ctl(epfd: Fd, op: EpollOp, fd: Fd, event: &EpollEvent) -> SysResult<()> {
+    let res = unsafe { ffi::epoll_ctl(epfd, op as c_int, fd, event as *const EpollEvent) };
+    from_ffi(res)
+}
+
+#[inline]
+pub fn epoll_wait(epfd: Fd, events: &mut [EpollEvent], timeout_ms: uint) -> SysResult<uint> {
+    let res = unsafe {
+        ffi::epoll_wait(epfd, events.as_mut_ptr(), events.len() as c_int, timeout_ms as c_int)
+    };
+
+    if res < 0 {
+        return Err(SysError::last());
+    }
+
+    Ok(res as uint)
+}

src/sys/epoll.rs

@@ -0,0 +1,2 @@
+pub mod epoll;
+pub mod stat;

src/sys/mod.rs

@@ -0,0 +1,51 @@
+#![cfg(target_os = "linux")]
+
+pub use libc::dev_t;
+
+use std::fmt;
+use std::io::FilePermission;
+use std::path::Path;
+use libc::mode_t;
+use errno::{SysResult, from_ffi};
+
+mod ffi {
+    use libc::{c_char, c_int, mode_t, dev_t};
+
+    extern {
+        pub fn mknod(pathname: *const c_char, mode: mode_t, dev: dev_t) -> c_int;
+        pub fn umask(mask: mode_t) -> mode_t;
+    }
+}
+
+bitflags!(
+    flags SFlag: mode_t {
+        static S_IFREG  = 0o100000,
+        static S_IFCHR  = 0o020000,
+        static S_IFBLK  = 0o060000,
+        static S_IFIFO  = 0o010000,
+        static S_IFSOCK = 0o140000
+    }
+)
+
+impl fmt::Show for SFlag {
+    fn fmt(&self, fmt: &mut fmt::Formatter) -> fmt::Result {
+        write!(fmt, "SFlag {{ bits: {} }}", self.bits())
+    }
+}
+
+pub fn mknod(path: &Path, kind: SFlag, perm: FilePermission, dev: dev_t) -> SysResult<()> {
+    let res = unsafe { ffi::mknod(path.to_c_str().as_ptr(), kind.bits | perm.bits(), dev) };
+    from_ffi(res)
+}
+
+static MINORBITS: uint = 20;
+// static MINORMASK: dev_t = ((1 << MINORBITS) - 1);
+
+pub fn mkdev(major: u64, minor: u64) -> dev_t {
+    (major << MINORBITS) | minor
+}
+
+pub fn umask(mode: FilePermission) -> FilePermission {
+    let prev = unsafe { ffi::umask(mode.bits()) };
+    FilePermission::from_bits(prev).expect("[BUG] umask returned invalid FilePermission")
+}

src/sys/stat.rs

@@ -1,3 +1,5 @@
+#![cfg(target_os = "linux")]
+
 use libc::c_int;
 
 pub use self::arch::*;