1 /*-
2 * Copyright (c) 2001 Marcel Moolenaar
3 * All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer
10 * in this position and unchanged.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
14 * 3. The name of the author may not be used to endorse or promote products
15 * derived from this software without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
18 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
19 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
20 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
21 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
22 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
23 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
24 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
25 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
26 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29 #include <sys/cdefs.h>
30 __FBSDID("$FreeBSD: releng/5.2/sys/compat/linux/linux_sysctl.c 116173 2003-06-10 21:29:12Z obrien $");
31
32 #include <sys/param.h>
33 #include <sys/lock.h>
34 #include <sys/malloc.h>
35 #include <sys/mutex.h>
36 #include <sys/proc.h>
37 #include <sys/sysctl.h>
38 #include <sys/systm.h>
39 #include <sys/sbuf.h>
40
41 #include <machine/../linux/linux.h>
42 #include <machine/../linux/linux_proto.h>
43
44 #include <compat/linux/linux_util.h>
45
46 #define LINUX_CTL_KERN 1
47 #define LINUX_CTL_VM 2
48 #define LINUX_CTL_NET 3
49 #define LINUX_CTL_PROC 4
50 #define LINUX_CTL_FS 5
51 #define LINUX_CTL_DEBUG 6
52 #define LINUX_CTL_DEV 7
53 #define LINUX_CTL_BUS 8
54
55 /* CTL_KERN names */
56 #define LINUX_KERN_OSTYPE 1
57 #define LINUX_KERN_OSRELEASE 2
58 #define LINUX_KERN_OSREV 3
59 #define LINUX_KERN_VERSION 4
60
61 static int
62 handle_string(struct l___sysctl_args *la, char *value)
63 {
64 int error;
65
66 if (la->oldval != NULL) {
67 l_int len = strlen(value);
68 error = copyout(value, la->oldval, len + 1);
69 if (!error && la->oldlenp != NULL)
70 error = copyout(&len, la->oldlenp, sizeof(len));
71 if (error)
72 return (error);
73 }
74
75 if (la->newval != NULL)
76 return (ENOTDIR);
77
78 return (0);
79 }
80
81 int
82 linux_sysctl(struct thread *td, struct linux_sysctl_args *args)
83 {
84 struct l___sysctl_args la;
85 struct sbuf *sb;
86 l_int *mib;
87 int error, i;
88
89 error = copyin(args->args, &la, sizeof(la));
90 if (error)
91 return (error);
92
93 if (la.nlen <= 0 || la.nlen > LINUX_CTL_MAXNAME)
94 return (ENOTDIR);
95
96 mib = malloc(la.nlen * sizeof(l_int), M_TEMP, M_WAITOK);
97 error = copyin(la.name, mib, la.nlen * sizeof(l_int));
98 if (error) {
99 free(mib, M_TEMP);
100 return (error);
101 }
102
103 switch (mib[0]) {
104 case LINUX_CTL_KERN:
105 if (la.nlen < 2)
106 break;
107
108 switch (mib[1]) {
109 case LINUX_KERN_VERSION:
110 error = handle_string(&la, version);
111 free(mib, M_TEMP);
112 return (error);
113 default:
114 break;
115 }
116 break;
117 default:
118 break;
119 }
120
121 sb = sbuf_new(NULL, NULL, 20 + la.nlen * 5, SBUF_AUTOEXTEND);
122 if (sb == NULL) {
123 linux_msg(td, "sysctl is not implemented");
124 } else {
125 sbuf_printf(sb, "sysctl ");
126 for (i = 0; i < la.nlen; i++)
127 sbuf_printf(sb, "%c%d", (i) ? ',' : '{', mib[i]);
128 sbuf_printf(sb, "} is not implemented");
129 sbuf_finish(sb);
130 linux_msg(td, "%s", sbuf_data(sb));
131 sbuf_delete(sb);
132 }
133
134 free(mib, M_TEMP);
135 return (ENOTDIR);
136 }
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