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
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
|
/* $NetBSD: kver.c,v 1.8 2006/04/09 17:47:46 cube Exp $ */
#include <sys/types.h>
#include <sys/param.h>
#include <sys/sysctl.h>
#include <sys/utsname.h>
#include <assert.h>
#include <errno.h>
#include <string.h>
#include <err.h>
#include <stdlib.h>
#include <ctype.h>
#define KVER_VERSION_FMT "NetBSD %s (LIBKVER) #0: Tue Jan 19 00:00:00 UTC 2038 root@localhost:/sys/arch/%s/compile/LIBKVER"
#define KVER_NOT_INITIALIZED_OSRELEASE -2
#define KVER_INVALID_OSRELEASE -1
#ifndef PATH_LIBKVER_OSRELEASE
#define PATH_LIBKVER_OSRELEASE "/libkver_osrelease"
#endif
#ifndef VAR_LIBKVER_OSRELEASE
#define VAR_LIBKVER_OSRELEASE "LIBKVER_OSRELEASE"
#endif
static struct kver {
char osrelease[_SYS_NMLN];
int osrevision;
char version[_SYS_NMLN];
} kver = {
"", KVER_NOT_INITIALIZED_OSRELEASE, ""
};
static struct utsname real_utsname;
#define KVER_NOT_INITIALIZED \
(kver.osrevision == KVER_NOT_INITIALIZED_OSRELEASE)
#define KVER_BADLY_INITIALIZED (kver.osrevision == KVER_INVALID_OSRELEASE)
#define SYSCTL_STRING(oldp, oldlenp, str) \
if (oldlenp) { \
len = strlen(str) + 1; \
if (!oldp) \
*oldlenp = len; \
else { \
if (*oldlenp < len) { \
r = ENOMEM; \
len = *oldlenp; \
} else \
*oldlenp = len; \
(void) strncpy(oldp, str, len); \
} \
}
#if __NetBSD_Version__ >= 399001600
#define SYSCTL_CONST const
#else
#define SYSCTL_CONST
#endif
static int
str2osrevision(char *s)
{
char c;
int n, r = 0;
if (s == NULL || *s == 0)
return KVER_INVALID_OSRELEASE;
if (!isdigit(*s))
return KVER_INVALID_OSRELEASE;
/* first digit: major */
for (n = 0; isdigit(*s); s++) {
n = (n * 10) + (*s - '0');
}
if (*s == 0 || *s != '.')
return KVER_INVALID_OSRELEASE;
r += (n * 100000000);
/* second digit: minor */
for (s++, n = 0; isdigit(*s); s++) {
n = (n * 10) + (*s - '0');
}
r += (n * 1000000);
/* nothing more, return */
if (*s == 0)
return r;
/* optional third digit: patchlevel */
if (*s == '.') {
for (s++, n = 0; isdigit(*s); s++) {
n = (n * 10) + (*s - '0');
}
r += (n * 100);
}
/* nothing more, return */
if (*s == 0)
return r;
/* or optional underscore followed by release status */
if (*s == '_')
/* ignore the trailing label */
return r;
/* or optional letters: release */
n = 0;
c = 'Z';
while (*s >= 'A' && *s <= 'Z') {
if (c != 'Z' && *s != 0)
break;
c = *s;
n += *s++ - '@';
}
if (n > 99)
return KVER_INVALID_OSRELEASE;
if (*s == 0)
return r + (n * 10000);
/* return on error if we end up here */
return KVER_INVALID_OSRELEASE;
}
static void
kver_initialize(void)
{
char *v;
int i;
kver.osrevision = KVER_INVALID_OSRELEASE; /* init done */
v = getenv(VAR_LIBKVER_OSRELEASE);
if (v == NULL) {
char b[MAXPATHLEN + 1];
i = readlink(PATH_LIBKVER_OSRELEASE, b, sizeof b - 1);
if (i <= 0) {
v = NULL;
} else {
b[i] = '\0';
v = b;
}
}
if (v == NULL) {
warnx("libkver: not configured");
return;
}
if (_uname(&real_utsname) != 0) {
warn("libkver: uname");
return;
}
kver.osrevision = str2osrevision(v);
if (kver.osrevision == KVER_INVALID_OSRELEASE) {
warnx("libkver: invalid version: %s", v);
return;
}
(void) strncpy(kver.osrelease, v, _SYS_NMLN);
kver.osrelease[_SYS_NMLN - 1] = '\0';
(void) snprintf(kver.version, _SYS_NMLN, KVER_VERSION_FMT,
kver.osrelease, real_utsname.machine);
return;
}
int
sysctl(SYSCTL_CONST int *name, u_int namelen, void *oldp, size_t * oldlenp,
const void *newp, size_t newlen)
{
_DIAGASSERT(name != NULL);
if (newp != (void *) NULL)
goto real;
if (KVER_NOT_INITIALIZED)
kver_initialize();
if (KVER_BADLY_INITIALIZED || namelen != 2)
goto real;
if (name[0] == CTL_KERN) {
size_t len;
int r = 0;
switch (name[1]) {
case KERN_OSRELEASE:
SYSCTL_STRING(oldp, oldlenp, kver.osrelease);
return (r);
case KERN_OSREV:
if (oldlenp) {
if (!oldp)
*oldlenp = sizeof(int);
else {
if (*oldlenp < sizeof(int))
return (ENOMEM);
*oldlenp = sizeof(int);
*((int *) oldp) = kver.osrevision;
}
}
return (r);
case KERN_VERSION:
SYSCTL_STRING(oldp, oldlenp, kver.version);
return (r);
}
}
real: return (_sysctl(name, namelen, oldp, oldlenp, newp, newlen));
}
int
uname(struct utsname * n)
{
if (KVER_NOT_INITIALIZED)
kver_initialize();
if (KVER_BADLY_INITIALIZED)
return _uname(n);
(void) strncpy(n->sysname, real_utsname.sysname, _SYS_NMLN);
(void) strncpy(n->nodename, real_utsname.nodename, _SYS_NMLN);
(void) strncpy(n->release, kver.osrelease, _SYS_NMLN);
(void) strncpy(n->version, kver.version, _SYS_NMLN);
(void) strncpy(n->machine, real_utsname.machine, _SYS_NMLN);
return 0;
}
|
