WIP: Kevent

kernel/syscall/fs.rs

@@ -98,6 +98,24 @@ pub fn dup(fd: usize) -> Result<usize> {
     scheme.dup(file.number)
 }
 
+/// Register events for file
+pub fn fevent(fd: usize, flags: usize) -> Result<usize> {
+    let file = {
+        let contexts = context::contexts();
+        let context_lock = contexts.current().ok_or(Error::new(ESRCH))?;
+        let context = context_lock.read();
+        let file = context.get_file(fd).ok_or(Error::new(EBADF))?;
+        file
+    };
+
+    let scheme = {
+        let schemes = scheme::schemes();
+        let scheme = schemes.get(file.scheme).ok_or(Error::new(EBADF))?;
+        scheme.clone()
+    };
+    scheme.fevent(file.number, flags)
+}
+
 /// Get the canonical path of the file
 pub fn fpath(fd: usize, buf: &mut [u8]) -> Result<usize> {
     let file = {

kernel/syscall/mod.rs

@@ -45,6 +45,7 @@ pub extern fn syscall(a: usize, b: usize, c: usize, d: usize, e: usize, f: usize
             SYS_CLONE => clone(b, stack),
             SYS_YIELD => sched_yield(),
             SYS_GETCWD => getcwd(validate_slice_mut(b as *mut u8, c)?),
+            SYS_FEVENT => fevent(b, c),
             SYS_FPATH => fpath(b, validate_slice_mut(c as *mut u8, d)?),
             SYS_PHYSMAP => physmap(b, c, d),
             SYS_PHYSUNMAP => physunmap(b),

kernel/syscall/process.rs

@@ -618,7 +618,6 @@ pub fn sched_yield() -> Result<usize> {
 }
 
 pub fn waitpid(pid: usize, status_ptr: usize, flags: usize) -> Result<usize> {
-    //TODO: Implement status_ptr and options
     loop {
         {
             let mut exited = false;
@@ -644,6 +643,6 @@ pub fn waitpid(pid: usize, status_ptr: usize, flags: usize) -> Result<usize> {
             }
         }
 
-        unsafe { context::switch(); }
+        unsafe { context::switch(); } //TODO: Block
     }
 }