Loading...
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 | /* * kernel/configs.c * 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 Al Stone <ahs3@fc.hp.com> * Copyright (C) 2002 Hewlett-Packard Company * * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or (at * your option) any later version. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or * NON INFRINGEMENT. See the GNU General Public License for more * details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * 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> #include <linux/seq_file.h> #include <linux/init.h> #include <asm/uaccess.h> /**************************************************/ /* the actual current config file */ /* This one is for extraction from the kernel binary file image. */ #include "ikconfig.h" #ifdef CONFIG_IKCONFIG_PROC /* This is the data that can be read from /proc/config.gz. */ #include "config_data.h" /**************************************************/ /* 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) { loff_t pos = *offset; ssize_t count; if (pos >= kernel_config_data_size) return 0; count = min(len, (size_t)(kernel_config_data_size - pos)); if(copy_to_user(buf, kernel_config_data + pos, count)) return -EFAULT; *offset += count; return count; } static struct file_operations ikconfig_file_ops = { .owner = THIS_MODULE, .read = ikconfig_read_current, }; /***************************************************/ /* ikconfig_init: start up everything we need to */ static int __init ikconfig_init(void) { struct proc_dir_entry *entry; printk(KERN_INFO "ikconfig %s with /proc/config*\n", IKCONFIG_VERSION); /* create the current config file */ entry = create_proc_entry("config.gz", S_IFREG | S_IRUGO, &proc_root); if (!entry) return -ENOMEM; entry->proc_fops = &ikconfig_file_ops; entry->size = kernel_config_data_size; return 0; } /***************************************************/ /* ikconfig_cleanup: clean up our mess */ static void __exit ikconfig_cleanup(void) { remove_proc_entry("config.gz", &proc_root); } module_init(ikconfig_init); module_exit(ikconfig_cleanup); MODULE_LICENSE("GPL"); MODULE_AUTHOR("Randy Dunlap"); MODULE_DESCRIPTION("Echo the kernel .config file used to build the kernel"); #endif /* CONFIG_IKCONFIG_PROC */ |