3 * Echo the kernel .config file used to build the kernel
5 * Copyright (C) 2002 Khalid Aziz <khalid_aziz@hp.com>
6 * Copyright (C) 2002 Randy Dunlap <rddunlap@osdl.org>
7 * Copyright (C) 2002 Al Stone <ahs3@fc.hp.com>
8 * Copyright (C) 2002 Hewlett-Packard Company
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or (at
13 * your option) any later version.
15 * This program is distributed in the hope that it will be useful, but
16 * WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
18 * NON INFRINGEMENT. See the GNU General Public License for more
21 * You should have received a copy of the GNU General Public License
22 * along with this program; if not, write to the Free Software
23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
26 #include <linux/config.h>
27 #include <linux/kernel.h>
28 #include <linux/module.h>
29 #include <linux/proc_fs.h>
30 #include <linux/seq_file.h>
31 #include <linux/init.h>
32 #include <asm/uaccess.h>
34 /**************************************************/
35 /* the actual current config file */
37 /* This one is for extraction from the kernel binary file image. */
40 #ifdef CONFIG_IKCONFIG_PROC
42 /* This is the data that can be read from /proc/config.gz. */
43 #include "config_data.h"
45 /**************************************************/
46 /* globals and useful constants */
48 static const char IKCONFIG_VERSION[] __initdata = "0.7";
51 ikconfig_read_current(struct file *file, char __user *buf,
52 size_t len, loff_t * offset)
57 if (pos >= kernel_config_data_size)
60 count = min(len, (size_t)(kernel_config_data_size - pos));
61 if(copy_to_user(buf, kernel_config_data + pos, count))
68 static struct file_operations ikconfig_file_ops = {
70 .read = ikconfig_read_current,
73 /***************************************************/
74 /* ikconfig_init: start up everything we need to */
76 static int __init ikconfig_init(void)
78 struct proc_dir_entry *entry;
80 /* create the current config file */
81 entry = create_proc_entry("config.gz", S_IFREG | S_IRUGO,
86 entry->proc_fops = &ikconfig_file_ops;
87 entry->size = kernel_config_data_size;
92 /***************************************************/
93 /* ikconfig_cleanup: clean up our mess */
95 static void __exit ikconfig_cleanup(void)
97 remove_proc_entry("config.gz", &proc_root);
100 module_init(ikconfig_init);
101 module_exit(ikconfig_cleanup);
103 MODULE_LICENSE("GPL");
104 MODULE_AUTHOR("Randy Dunlap");
105 MODULE_DESCRIPTION("Echo the kernel .config file used to build the kernel");
107 #endif /* CONFIG_IKCONFIG_PROC */