* Echo the kernel .config file used to build the kernel
*
* Copyright (C) 2002 Khalid Aziz <khalid_aziz@hp.com>
- * Copyright (C) 2002 Randy Dunlap <rddunlap@osdl.org>
+ * Copyright (C) 2002 Randy Dunlap <rdunlap@xenotime.net>
* Copyright (C) 2002 Al Stone <ahs3@fc.hp.com>
* Copyright (C) 2002 Hewlett-Packard Company
*
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*/
-#include <linux/config.h>
#include <linux/kernel.h>
#include <linux/module.h>
#include <linux/proc_fs.h>
/**************************************************/
/* the actual current config file */
-/* This one is for extraction from the kernel binary file image. */
-#include "ikconfig.h"
+/*
+ * Define kernel_config_data and kernel_config_data_size, which contains the
+ * wrapped and compressed configuration file. The file is first compressed
+ * with gzip and then bounded by two eight byte magic numbers to allow
+ * extraction from a binary kernel image:
+ *
+ * IKCFG_ST
+ * <image>
+ * IKCFG_ED
+ */
+#define MAGIC_START "IKCFG_ST"
+#define MAGIC_END "IKCFG_ED"
+#include "config_data.h"
-#ifdef CONFIG_IKCONFIG_PROC
-/* This is the data that can be read from /proc/config.gz. */
-#include "config_data.h"
+#define MAGIC_SIZE (sizeof(MAGIC_START) - 1)
+#define kernel_config_data_size \
+ (sizeof(kernel_config_data) - 1 - MAGIC_SIZE * 2)
+
+#ifdef CONFIG_IKCONFIG_PROC
/**************************************************/
/* globals and useful constants */
-static const char IKCONFIG_VERSION[] __initdata = "0.7";
-
static ssize_t
ikconfig_read_current(struct file *file, char __user *buf,
size_t len, loff_t * offset)
return 0;
count = min(len, (size_t)(kernel_config_data_size - pos));
- if(copy_to_user(buf, kernel_config_data + pos, count))
+ if (copy_to_user(buf, kernel_config_data + MAGIC_SIZE + pos, count))
return -EFAULT;
*offset += count;