Adds flags for open function

kernel-1100/src/lib.rs

@@ -10,6 +10,7 @@ use self::thread::Thread;
 use self::ucred::Ucred;
 use self::uio::Uio;
 use core::ffi::{c_char, c_int};
+use okf::fcntl::OpenFlags;
 use okf::malloc::MallocFlags;
 use okf::queue::TailQueue;
 use okf::socket::SockAddr;
@@ -74,7 +75,7 @@ impl okf::Kernel for Kernel {
         fd: c_int,
         path: *const c_char,
         seg: UioSeg,
-        flags: c_int,
+        flags: OpenFlags,
         mode: c_int,
     ) -> c_int;
 

src/fcntl/mod.rs

@@ -1,3 +1,23 @@
+use bitflags::bitflags;
 use core::ffi::c_int;
 
 pub const AT_FDCWD: c_int = -100;
+
+bitflags! {
+    /// Flags for `open` and related functions.
+    #[repr(transparent)]
+    #[derive(Debug, Clone, Copy, PartialEq, Eq)]
+    pub struct OpenFlags: c_int {
+        const O_RDONLY = 0x00000000;
+        const O_WRONLY = 0x00000001;
+        const O_RDWR = 0x00000002;
+        const O_ACCMODE = Self::O_WRONLY.bits() | Self::O_RDWR.bits();
+        const O_SHLOCK = 0x00000010;
+        const O_EXLOCK = 0x00000020;
+        const O_CREAT = 0x00000200;
+        const O_TRUNC = 0x00000400;
+        const O_EXCL = 0x00000800;
+        const O_EXEC = 0x00040000;
+        const O_CLOEXEC = 0x00100000;
+    }
+}

src/lib.rs

@@ -1,5 +1,6 @@
 #![no_std]
 
+use self::fcntl::OpenFlags;
 use self::file::File;
 use self::lock::{LockObject, Mtx};
 use self::malloc::{Malloc, MallocFlags};
@@ -98,7 +99,7 @@ pub trait Kernel: MappedKernel {
         fd: c_int,
         path: *const c_char,
         seg: UioSeg,
-        flags: c_int,
+        flags: OpenFlags,
         mode: c_int,
     ) -> c_int;