4 * Author: Eric Biederman <ebiederm@xmision.com>
6 * This program is free software; you can redistribute it and/or
7 * modify it under the terms of the GNU General Public License as
8 * published by the Free Software Foundation, version 2 of the
12 #include <linux/module.h>
13 #include <linux/uts.h>
14 #include <linux/utsname.h>
15 #include <linux/version.h>
16 #include <linux/sysctl.h>
18 static void *get_uts(ctl_table
*table
, int write
)
20 char *which
= table
->data
;
22 struct uts_namespace
*uts_ns
= current
->nsproxy
->uts_ns
;
23 which
= (which
- (char *)&init_uts_ns
) + (char *)uts_ns
;
32 static void put_uts(ctl_table
*table
, int write
, void *which
)
42 * Special case of dostring for the UTS structure. This has locks
43 * to observe. Should this be in kernel/sys.c ????
45 static int proc_do_uts_string(ctl_table
*table
, int write
, struct file
*filp
,
46 void __user
*buffer
, size_t *lenp
, loff_t
*ppos
)
48 struct ctl_table uts_table
;
50 memcpy(&uts_table
, table
, sizeof(uts_table
));
51 uts_table
.data
= get_uts(table
, write
);
52 r
= proc_dostring(&uts_table
,write
,filp
,buffer
,lenp
, ppos
);
53 put_uts(table
, write
, uts_table
.data
);
57 #define proc_do_uts_string NULL
61 #ifdef CONFIG_SYSCTL_SYSCALL
62 /* The generic string strategy routine: */
63 static int sysctl_uts_string(ctl_table
*table
, int __user
*name
, int nlen
,
64 void __user
*oldval
, size_t __user
*oldlenp
,
65 void __user
*newval
, size_t newlen
)
67 struct ctl_table uts_table
;
69 write
= newval
&& newlen
;
70 memcpy(&uts_table
, table
, sizeof(uts_table
));
71 uts_table
.data
= get_uts(table
, write
);
72 r
= sysctl_string(&uts_table
, name
, nlen
,
73 oldval
, oldlenp
, newval
, newlen
);
74 put_uts(table
, write
, uts_table
.data
);
78 #define sysctl_uts_string NULL
81 static struct ctl_table uts_kern_table
[] = {
83 .ctl_name
= KERN_OSTYPE
,
85 .data
= init_uts_ns
.name
.sysname
,
86 .maxlen
= sizeof(init_uts_ns
.name
.sysname
),
88 .proc_handler
= proc_do_uts_string
,
89 .strategy
= sysctl_uts_string
,
92 .ctl_name
= KERN_OSRELEASE
,
93 .procname
= "osrelease",
94 .data
= init_uts_ns
.name
.release
,
95 .maxlen
= sizeof(init_uts_ns
.name
.release
),
97 .proc_handler
= proc_do_uts_string
,
98 .strategy
= sysctl_uts_string
,
101 .ctl_name
= KERN_VERSION
,
102 .procname
= "version",
103 .data
= init_uts_ns
.name
.version
,
104 .maxlen
= sizeof(init_uts_ns
.name
.version
),
106 .proc_handler
= proc_do_uts_string
,
107 .strategy
= sysctl_uts_string
,
110 .ctl_name
= KERN_NODENAME
,
111 .procname
= "hostname",
112 .data
= init_uts_ns
.name
.nodename
,
113 .maxlen
= sizeof(init_uts_ns
.name
.nodename
),
115 .proc_handler
= proc_do_uts_string
,
116 .strategy
= sysctl_uts_string
,
119 .ctl_name
= KERN_DOMAINNAME
,
120 .procname
= "domainname",
121 .data
= init_uts_ns
.name
.domainname
,
122 .maxlen
= sizeof(init_uts_ns
.name
.domainname
),
124 .proc_handler
= proc_do_uts_string
,
125 .strategy
= sysctl_uts_string
,
130 static struct ctl_table uts_root_table
[] = {
132 .ctl_name
= CTL_KERN
,
133 .procname
= "kernel",
135 .child
= uts_kern_table
,
140 static int __init
utsname_sysctl_init(void)
142 register_sysctl_table(uts_root_table
);
146 __initcall(utsname_sysctl_init
);