1 /*-
2 * SPDX-License-Identifier: BSD-4-Clause
3 *
4 * Copyright (c) 2002 Juli Mallett.
5 * Copyright (c) 1993
6 * The Regents of the University of California. All rights reserved.
7 *
8 * Redistribution and use in source and binary forms, with or without
9 * modification, are permitted provided that the following conditions
10 * are met:
11 * 1. Redistributions of source code must retain the above copyright
12 * notice, this list of conditions and the following disclaimer.
13 * 2. Redistributions in binary form must reproduce the above copyright
14 * notice, this list of conditions and the following disclaimer in the
15 * documentation and/or other materials provided with the distribution.
16 * 3. All advertising materials mentioning features or use of this software
17 * must display the following acknowledgement:
18 * This product includes software developed by the University of
19 * California, Berkeley and its contributors.
20 * 4. Neither the name of the University nor the names of its contributors
21 * may be used to endorse or promote products derived from this software
22 * without specific prior written permission.
23 *
24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 * SUCH DAMAGE.
35 */
36
37
38 #ifndef lint
39 static const char copyright[] =
40 "@(#) Copyright (c) 1993\n\
41 The Regents of the University of California. All rights reserved.\n";
42 #endif
43
44 #ifndef lint
45 static const char sccsid[] = "@(#)uname.c 8.2 (Berkeley) 5/4/95";
46 #endif
47
48 #include <sys/param.h>
49 #include <sys/sysctl.h>
50
51 #include <err.h>
52 #include <stdio.h>
53 #include <stdlib.h>
54 #include <unistd.h>
55
56 #include <osreldate.h>
57
58 #define MFLAG 0x01
59 #define NFLAG 0x02
60 #define PFLAG 0x04
61 #define RFLAG 0x08
62 #define SFLAG 0x10
63 #define VFLAG 0x20
64 #define IFLAG 0x40
65 #define UFLAG 0x80
66 #define KFLAG 0x100
67 #define BFLAG 0x200
68
69 typedef void (*get_t)(void);
70 static get_t get_buildid, get_ident, get_platform, get_hostname, get_arch,
71 get_release, get_sysname, get_kernvers, get_uservers, get_version;
72
73 static void native_ident(void);
74 static void native_platform(void);
75 static void native_hostname(void);
76 static void native_arch(void);
77 static void native_release(void);
78 static void native_sysname(void);
79 static void native_version(void);
80 static void native_kernvers(void);
81 static void native_uservers(void);
82 static void native_buildid(void);
83 static void print_uname(u_int);
84 static void setup_get(void);
85 static void usage(void) __dead2;
86
87 static char *buildid, *ident, *platform, *hostname, *arch, *release, *sysname,
88 *version, *kernvers, *uservers;
89 static int space;
90
91 int
main(int argc,char * argv[])92 main(int argc, char *argv[])
93 {
94 u_int flags;
95 int ch;
96
97 setup_get();
98 flags = 0;
99
100 while ((ch = getopt(argc, argv, "abiKmnoprsUv")) != -1)
101 switch(ch) {
102 case 'a':
103 flags |= (MFLAG | NFLAG | RFLAG | SFLAG | VFLAG);
104 break;
105 case 'b':
106 flags |= BFLAG;
107 break;
108 case 'i':
109 flags |= IFLAG;
110 break;
111 case 'K':
112 flags |= KFLAG;
113 break;
114 case 'm':
115 flags |= MFLAG;
116 break;
117 case 'n':
118 flags |= NFLAG;
119 break;
120 case 'p':
121 flags |= PFLAG;
122 break;
123 case 'r':
124 flags |= RFLAG;
125 break;
126 case 's':
127 case 'o':
128 flags |= SFLAG;
129 break;
130 case 'U':
131 flags |= UFLAG;
132 break;
133 case 'v':
134 flags |= VFLAG;
135 break;
136 case '?':
137 default:
138 usage();
139 }
140
141 argc -= optind;
142 argv += optind;
143
144 if (argc)
145 usage();
146
147 if (!flags)
148 flags |= SFLAG;
149
150 print_uname(flags);
151 exit(0);
152 }
153
154 #define CHECK_ENV(opt,var) \
155 do { \
156 if ((var = getenv("UNAME_" opt)) == NULL) { \
157 get_##var = native_##var; \
158 } else { \
159 get_##var = (get_t)NULL; \
160 } \
161 } while (0)
162
163 static void
setup_get(void)164 setup_get(void)
165 {
166 CHECK_ENV("s", sysname);
167 CHECK_ENV("n", hostname);
168 CHECK_ENV("r", release);
169 CHECK_ENV("v", version);
170 CHECK_ENV("m", platform);
171 CHECK_ENV("p", arch);
172 CHECK_ENV("i", ident);
173 CHECK_ENV("K", kernvers);
174 CHECK_ENV("U", uservers);
175 CHECK_ENV("b", buildid);
176 }
177
178 #define PRINT_FLAG(flags,flag,var) \
179 if ((flags & flag) == flag) { \
180 if (space) \
181 printf(" "); \
182 else \
183 space++; \
184 if (get_##var != NULL) \
185 (*get_##var)(); \
186 printf("%s", var); \
187 }
188
189 static void
print_uname(u_int flags)190 print_uname(u_int flags)
191 {
192 PRINT_FLAG(flags, SFLAG, sysname);
193 PRINT_FLAG(flags, NFLAG, hostname);
194 PRINT_FLAG(flags, RFLAG, release);
195 PRINT_FLAG(flags, VFLAG, version);
196 PRINT_FLAG(flags, MFLAG, platform);
197 PRINT_FLAG(flags, PFLAG, arch);
198 PRINT_FLAG(flags, IFLAG, ident);
199 PRINT_FLAG(flags, KFLAG, kernvers);
200 PRINT_FLAG(flags, UFLAG, uservers);
201 PRINT_FLAG(flags, BFLAG, buildid);
202 printf("\n");
203 }
204
205 #define NATIVE_SYSCTL2_GET(var,mib0,mib1) \
206 static void \
207 native_##var(void) \
208 { \
209 int mib[] = { (mib0), (mib1) }; \
210 size_t len; \
211 static char buf[1024]; \
212 char **varp = &(var); \
213 \
214 len = sizeof buf; \
215 if (sysctl(mib, sizeof mib / sizeof mib[0], \
216 &buf, &len, NULL, 0) == -1) \
217 err(1, "sysctl");
218
219 #define NATIVE_SYSCTLNAME_GET(var,name) \
220 static void \
221 native_##var(void) \
222 { \
223 size_t len; \
224 static char buf[1024]; \
225 char **varp = &(var); \
226 \
227 len = sizeof buf; \
228 if (sysctlbyname(name, &buf, &len, NULL,\
229 0) == -1) \
230 err(1, "sysctlbyname");
231
232 #define NATIVE_SET \
233 *varp = buf; \
234 return; \
235 } struct __hack
236
237 #define NATIVE_BUFFER (buf)
238 #define NATIVE_LENGTH (len)
239
NATIVE_SYSCTL2_GET(sysname,CTL_KERN,KERN_OSTYPE)240 NATIVE_SYSCTL2_GET(sysname, CTL_KERN, KERN_OSTYPE) {
241 } NATIVE_SET;
242
NATIVE_SYSCTL2_GET(hostname,CTL_KERN,KERN_HOSTNAME)243 NATIVE_SYSCTL2_GET(hostname, CTL_KERN, KERN_HOSTNAME) {
244 } NATIVE_SET;
245
NATIVE_SYSCTL2_GET(release,CTL_KERN,KERN_OSRELEASE)246 NATIVE_SYSCTL2_GET(release, CTL_KERN, KERN_OSRELEASE) {
247 } NATIVE_SET;
248
NATIVE_SYSCTL2_GET(version,CTL_KERN,KERN_VERSION)249 NATIVE_SYSCTL2_GET(version, CTL_KERN, KERN_VERSION) {
250 size_t n;
251 char *p;
252
253 p = NATIVE_BUFFER;
254 n = NATIVE_LENGTH;
255 for (; n--; ++p)
256 if (*p == '\n' || *p == '\t') {
257 if (n > 1)
258 *p = ' ';
259 else
260 *p = '\0';
261 }
262 } NATIVE_SET;
263
NATIVE_SYSCTL2_GET(platform,CTL_HW,HW_MACHINE)264 NATIVE_SYSCTL2_GET(platform, CTL_HW, HW_MACHINE) {
265 } NATIVE_SET;
266
NATIVE_SYSCTL2_GET(arch,CTL_HW,HW_MACHINE_ARCH)267 NATIVE_SYSCTL2_GET(arch, CTL_HW, HW_MACHINE_ARCH) {
268 } NATIVE_SET;
269
270 NATIVE_SYSCTLNAME_GET(ident, "kern.ident") {
271 } NATIVE_SET;
272
273 NATIVE_SYSCTLNAME_GET(buildid, "kern.build_id") {
274 } NATIVE_SET;
275
276 static void
native_uservers(void)277 native_uservers(void)
278 {
279 static char buf[128];
280
281 snprintf(buf, sizeof(buf), "%d", __FreeBSD_version);
282 uservers = buf;
283 }
284
285 static void
native_kernvers(void)286 native_kernvers(void)
287 {
288 static char buf[128];
289
290 snprintf(buf, sizeof(buf), "%d", getosreldate());
291 kernvers = buf;
292 }
293
294 static void
usage(void)295 usage(void)
296 {
297 fprintf(stderr, "usage: uname [-abiKmnoprsUv]\n");
298 exit(1);
299 }
300