diff options
author | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
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committer | Linus Torvalds <torvalds@ppc970.osdl.org> | 2005-04-16 18:20:36 -0400 |
commit | 1da177e4c3f41524e886b7f1b8a0c1fc7321cac2 (patch) | |
tree | 0bba044c4ce775e45a88a51686b5d9f90697ea9d /kernel/configs.c |
Linux-2.6.12-rc2
Initial git repository build. I'm not bothering with the full history,
even though we have it. We can create a separate "historical" git
archive of that later if we want to, and in the meantime it's about
3.2GB when imported into git - space that would just make the early
git days unnecessarily complicated, when we don't have a lot of good
infrastructure for it.
Let it rip!
Diffstat (limited to 'kernel/configs.c')
-rw-r--r-- | kernel/configs.c | 118 |
1 files changed, 118 insertions, 0 deletions
diff --git a/kernel/configs.c b/kernel/configs.c new file mode 100644 index 000000000000..986f7af31e0a --- /dev/null +++ b/kernel/configs.c | |||
@@ -0,0 +1,118 @@ | |||
1 | /* | ||
2 | * kernel/configs.c | ||
3 | * Echo the kernel .config file used to build the kernel | ||
4 | * | ||
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 | ||
9 | * | ||
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. | ||
14 | * | ||
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 | ||
19 | * details. | ||
20 | * | ||
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. | ||
24 | */ | ||
25 | |||
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> | ||
33 | |||
34 | /**************************************************/ | ||
35 | /* the actual current config file */ | ||
36 | |||
37 | /* | ||
38 | * Define kernel_config_data and kernel_config_data_size, which contains the | ||
39 | * wrapped and compressed configuration file. The file is first compressed | ||
40 | * with gzip and then bounded by two eight byte magic numbers to allow | ||
41 | * extraction from a binary kernel image: | ||
42 | * | ||
43 | * IKCFG_ST | ||
44 | * <image> | ||
45 | * IKCFG_ED | ||
46 | */ | ||
47 | #define MAGIC_START "IKCFG_ST" | ||
48 | #define MAGIC_END "IKCFG_ED" | ||
49 | #include "config_data.h" | ||
50 | |||
51 | |||
52 | #define MAGIC_SIZE (sizeof(MAGIC_START) - 1) | ||
53 | #define kernel_config_data_size \ | ||
54 | (sizeof(kernel_config_data) - 1 - MAGIC_SIZE * 2) | ||
55 | |||
56 | #ifdef CONFIG_IKCONFIG_PROC | ||
57 | |||
58 | /**************************************************/ | ||
59 | /* globals and useful constants */ | ||
60 | |||
61 | static ssize_t | ||
62 | ikconfig_read_current(struct file *file, char __user *buf, | ||
63 | size_t len, loff_t * offset) | ||
64 | { | ||
65 | loff_t pos = *offset; | ||
66 | ssize_t count; | ||
67 | |||
68 | if (pos >= kernel_config_data_size) | ||
69 | return 0; | ||
70 | |||
71 | count = min(len, (size_t)(kernel_config_data_size - pos)); | ||
72 | if (copy_to_user(buf, kernel_config_data + MAGIC_SIZE + pos, count)) | ||
73 | return -EFAULT; | ||
74 | |||
75 | *offset += count; | ||
76 | return count; | ||
77 | } | ||
78 | |||
79 | static struct file_operations ikconfig_file_ops = { | ||
80 | .owner = THIS_MODULE, | ||
81 | .read = ikconfig_read_current, | ||
82 | }; | ||
83 | |||
84 | /***************************************************/ | ||
85 | /* ikconfig_init: start up everything we need to */ | ||
86 | |||
87 | static int __init ikconfig_init(void) | ||
88 | { | ||
89 | struct proc_dir_entry *entry; | ||
90 | |||
91 | /* create the current config file */ | ||
92 | entry = create_proc_entry("config.gz", S_IFREG | S_IRUGO, | ||
93 | &proc_root); | ||
94 | if (!entry) | ||
95 | return -ENOMEM; | ||
96 | |||
97 | entry->proc_fops = &ikconfig_file_ops; | ||
98 | entry->size = kernel_config_data_size; | ||
99 | |||
100 | return 0; | ||
101 | } | ||
102 | |||
103 | /***************************************************/ | ||
104 | /* ikconfig_cleanup: clean up our mess */ | ||
105 | |||
106 | static void __exit ikconfig_cleanup(void) | ||
107 | { | ||
108 | remove_proc_entry("config.gz", &proc_root); | ||
109 | } | ||
110 | |||
111 | module_init(ikconfig_init); | ||
112 | module_exit(ikconfig_cleanup); | ||
113 | |||
114 | MODULE_LICENSE("GPL"); | ||
115 | MODULE_AUTHOR("Randy Dunlap"); | ||
116 | MODULE_DESCRIPTION("Echo the kernel .config file used to build the kernel"); | ||
117 | |||
118 | #endif /* CONFIG_IKCONFIG_PROC */ | ||