fd: new abstraction

src/sys/syscalls/close.c

@@ -6,40 +6,17 @@
 
 syscallret syscall_close(int ifd){
         syscallret retv;
-        retv.ret = -1;
+        retv.ret = 0;
+	retv.errno = 0;
 
         proc_t* proc = arch_getcls()->thread->proc;
 
-        fd_t* fd = proc->fds + ifd;
+	int err = fd_free(&proc->fdtable, ifd);
 
-        spinlock_acquire(&proc->fdlock);
-
-        if(proc->fdcount <= ifd || fd->node == NULL || (fd->flags & FD_FLAGS_READ) == 0){
-                spinlock_release(&proc->fdlock);
-                retv.errno = EBADF;
-                return retv;
-        }
-
-        spinlock_acquire(&fd->lock);
-        spinlock_release(&proc->fdlock);
-	
-	int ret = vfs_close(fd->node);
-	
-	if(ret){
-		retv.errno = ret;
-		goto _ret;
+	if(err){
+		retv.errno = err;
+		retv.ret = -1;
 	}
 
-	// the fd table isn't resized on a close
-	// although that can be added if it becomes an issue
-	
-	fd->node = NULL;
-
-	retv.ret = 0;
-	retv.errno = 0;
-
-	_ret:
-
-	spinlock_release(&fd->lock);
 	return retv;
 }