This patch adds a character device driver to allow user space access to
the aranym natfeats nfstderr.
Signed-off-by: Stephen R. Marenka <stephen@xxxxxxxxxxx>
--- linux-2.6.22/arch/m68k/emu/nfstderr.c.orig 1969-12-31 18:00:00.000000000 -0600
+++ linux-2.6.22/arch/m68k/emu/nfstderr.c 2008-01-10 16:43:39.000000000 -0600
@@ -0,0 +1,120 @@
+/*
+ * nfstderr.c - ARAnyM NF_STDERR handler for GNU/Linux
+ *
+ * With this module you may write to the emulator's stderr output
+ * (the native console).
+ *
+ * Copyright (c) 2008 Stephen R. Marenka
+ *
+ * Based on the ARAnyM driver for FreeMiNT written by Standa Opichal,
+ * the ARAnyM driver nfeth driver for linux written by Milan Jurik,
+ * and the scull char module from the book "Linux Device Drivers" by
+ * Alessandro Rubini and Jonathan Corbet, published by
+ * O'Reilly & Associates (LDD3).
+ *
+ * This software may be used and distributed according to the terms of
+ * the GNU General Public License (GPL), incorporated herein by reference.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+
+#include <linux/kernel.h> /* printk() */
+#include <linux/fs.h> /* everything... */
+#include <linux/errno.h> /* error codes */
+#include <linux/types.h> /* size_t */
+#include <linux/proc_fs.h>
+#include <linux/fcntl.h> /* O_ACCMODE */
+#include <linux/seq_file.h>
+#include <linux/cdev.h>
+
+#include <asm/system.h> /* cli(), *_flags */
+#include <asm/uaccess.h> /* copy_*_user */
+#include <asm/natfeat.h> /* nfprint */
+
+/* define device major at compile or load time */
+#ifndef NFSTDERR_MAJOR
+#define NFSTDERR_MAJOR 0 /* default to dynamic */
+#endif
+int nfstderr_major = NFSTDERR_MAJOR;
+
+module_param(nfstderr_major, int, S_IRUGO);
+
+/* character device */
+struct cdev cdev;
+
+
+MODULE_AUTHOR("Stephen R. Marenka");
+MODULE_DESCRIPTION("ARAnyM NFstderr driver");
+MODULE_LICENSE("GPL");
+
+
+ssize_t nfstderr_write(struct file *filp, const char __user *str, size_t count,
+ loff_t *f_pos)
+{
+ int id;
+ char buf[68];
+ size_t retcount = count;
+
+ id = nf_get_id("NF_STDERR");
+ if ( id )
+ {
+ buf[64] = 0;
+ while (count > 64) {
+ copy_from_user(buf, str, 64);
+ nf_call(id, buf);
+ str += 64;
+ count -= 64;
+ }
+ copy_from_user(buf, str, count);
+ buf[count] = 0;
+ nf_call(id, buf);
+ }
+ return retcount;
+}
+
+struct file_operations nfstderr_fops = {
+ .owner = THIS_MODULE,
+ .write = nfstderr_write,
+};
+
+int nfstderr_init_module(void)
+{
+ int result;
+ dev_t devno = 0;
+ if (nfstderr_major) {
+ devno = MKDEV(nfstderr_major, 0);
+ result = register_chrdev_region(devno, 1, "nfstderr");
+ } else {
+ result = alloc_chrdev_region(&devno, 0, 0, "nfstderr");
+ nfstderr_major = MAJOR(devno);
+ }
+ if (0 > result) {
+ printk(KERN_ERR "nfstderr: error can't get major %d\n", nfstderr_major);
+ return result;
+ }
+ else {
+ int err;
+ cdev_init(&cdev, &nfstderr_fops);
+ cdev.owner = THIS_MODULE;
+ cdev.ops = &nfstderr_fops;
+ err = cdev_add(&cdev, devno, 1);
+ /* Fail gracefully if need be */
+ if (err) {
+ printk(KERN_ERR "nfstderr: error adding cdev: %d\n", err);
+ return err;
+ }
+ }
+
+ return 0;
+}
+
+void nfstderr_cleanup_module(void)
+{
+ cdev_del(&cdev);
+ unregister_chrdev_region( MKDEV(nfstderr_major, 0), 0);
+}
+
+module_init(nfstderr_init_module);
+module_exit(nfstderr_cleanup_module);
--- linux-2.6.22/arch/m68k/emu/Makefile.orig 2008-01-09 12:42:03.000000000 -0600
+++ linux-2.6.22/arch/m68k/emu/Makefile 2008-01-10 16:45:07.000000000 -0600
@@ -2,6 +2,6 @@
# Makefile for Linux arch/m68k/emu source directory
#
-obj-y += natfeat.o
+obj-y += natfeat.o nfstderr.o
obj-$(CONFIG_NFETH) += nfeth.o
--
Stephen R. Marenka If life's not fun, you're not doing it right!
<stephen@xxxxxxxxxxx>
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