Init

sys/sunwindowdev/win_syscall.c

@@ -0,0 +1,64 @@
+#ifndef lint
+static	char sccsid[] = "@(#)win_syscall.c 1.1 94/10/31 SMI";
+#endif
+
+/*
+ * Copyright (c) 1987 by Sun Microsystems, Inc.
+ */
+
+/*
+ * SunWindows kernel equivalents of selected user process level calls,
+ * i.e, dup and read.
+ */
+
+#include <sys/param.h>
+#include <sys/user.h>
+#include <sys/uio.h>
+#include <sys/file.h>
+#include <sys/stropts.h>
+#include <sys/stream.h>
+#include <sys/vfs.h>
+#include <sys/vnode.h>
+#include <specfs/snode.h>
+
+/*
+ * Dup file descriptor for device opened by user for kernel use.
+ */
+int
+kern_dupfd(fd, fpp)
+	int	fd;
+	struct	file **fpp;
+{
+	register struct file *fp;
+
+	*fpp = NULL;
+	fp = getf(fd);
+	if (fp == 0) {
+#ifdef WINDEVDEBUG
+		printf("getf fp == 0\n");
+#endif
+		return (EINVAL);
+	}
+	if (fp->f_type != DTYPE_VNODE)
+		return (EINVAL);	/* not a vnode */
+	*fpp = fp;
+	fp->f_count++;
+	return (0);
+}
+
+int
+kern_read(vp, buf, len_ptr)
+	struct	vnode *vp;
+	caddr_t	buf;
+	int	*len_ptr;
+{
+	int error;
+
+	error = strkread(vp->v_stream, buf, len_ptr);
+	/*
+	 * If any data was read, mark the vnode as accessed.
+	 */
+	if (*len_ptr != 0)
+		smark(VTOS(vp), SACC);
+	return (error);
+}