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 #include <sys/cdefs.h>
38
39 __FBSDID("$FreeBSD$");
40
41 #ifndef lint
42 static const char copyright[] =
43 "@(#) Copyright (c) 1993\n\
44 The Regents of the University of California. All rights reserved.\n";
45 #endif
46
47 #ifndef lint
48 static const char sccsid[] = "@(#)uname.c 8.2 (Berkeley) 5/4/95";
49 #endif
50
51 #include <sys/param.h>
52 #include <sys/sysctl.h>
53
54 #include <err.h>
55 #include <stdio.h>
56 #include <stdlib.h>
57 #include <unistd.h>
58
59 #include <osreldate.h>
60
61 #define MFLAG 0x01
62 #define NFLAG 0x02
63 #define PFLAG 0x04
64 #define RFLAG 0x08
65 #define SFLAG 0x10
66 #define VFLAG 0x20
67 #define IFLAG 0x40
68 #define UFLAG 0x80
69 #define KFLAG 0x100
70 #define BFLAG 0x200
71
72 typedef void (*get_t)(void);
73 static get_t get_buildid, get_ident, get_platform, get_hostname, get_arch,
74 get_release, get_sysname, get_kernvers, get_uservers, get_version;
75
76 static void native_ident(void);
77 static void native_platform(void);
78 static void native_hostname(void);
79 static void native_arch(void);
80 static void native_release(void);
81 static void native_sysname(void);
82 static void native_version(void);
83 static void native_kernvers(void);
84 static void native_uservers(void);
85 static void native_buildid(void);
86 static void print_uname(u_int);
87 static void setup_get(void);
88 static void usage(void);
89
90 static char *buildid, *ident, *platform, *hostname, *arch, *release, *sysname,
91 *version, *kernvers, *uservers;
92 static int space;
93
94 int
main(int argc,char * argv[])95 main(int argc, char *argv[])
96 {
97 u_int flags;
98 int ch;
99
100 setup_get();
101 flags = 0;
102
103 while ((ch = getopt(argc, argv, "abiKmnoprsUv")) != -1)
104 switch(ch) {
105 case 'a':
106 flags |= (MFLAG | NFLAG | RFLAG | SFLAG | VFLAG);
107 break;
108 case 'b':
109 flags |= BFLAG;
110 break;
111 case 'i':
112 flags |= IFLAG;
113 break;
114 case 'K':
115 flags |= KFLAG;
116 break;
117 case 'm':
118 flags |= MFLAG;
119 break;
120 case 'n':
121 flags |= NFLAG;
122 break;
123 case 'p':
124 flags |= PFLAG;
125 break;
126 case 'r':
127 flags |= RFLAG;
128 break;
129 case 's':
130 case 'o':
131 flags |= SFLAG;
132 break;
133 case 'U':
134 flags |= UFLAG;
135 break;
136 case 'v':
137 flags |= VFLAG;
138 break;
139 case '?':
140 default:
141 usage();
142 }
143
144 argc -= optind;
145 argv += optind;
146
147 if (argc)
148 usage();
149
150 if (!flags)
151 flags |= SFLAG;
152
153 print_uname(flags);
154 exit(0);
155 }
156
157 #define CHECK_ENV(opt,var) \
158 do { \
159 if ((var = getenv("UNAME_" opt)) == NULL) { \
160 get_##var = native_##var; \
161 } else { \
162 get_##var = (get_t)NULL; \
163 } \
164 } while (0)
165
166 static void
setup_get(void)167 setup_get(void)
168 {
169 CHECK_ENV("s", sysname);
170 CHECK_ENV("n", hostname);
171 CHECK_ENV("r", release);
172 CHECK_ENV("v", version);
173 CHECK_ENV("m", platform);
174 CHECK_ENV("p", arch);
175 CHECK_ENV("i", ident);
176 CHECK_ENV("K", kernvers);
177 CHECK_ENV("U", uservers);
178 CHECK_ENV("b", buildid);
179 }
180
181 #define PRINT_FLAG(flags,flag,var) \
182 if ((flags & flag) == flag) { \
183 if (space) \
184 printf(" "); \
185 else \
186 space++; \
187 if (get_##var != NULL) \
188 (*get_##var)(); \
189 printf("%s", var); \
190 }
191
192 static void
print_uname(u_int flags)193 print_uname(u_int flags)
194 {
195 PRINT_FLAG(flags, SFLAG, sysname);
196 PRINT_FLAG(flags, NFLAG, hostname);
197 PRINT_FLAG(flags, RFLAG, release);
198 PRINT_FLAG(flags, VFLAG, version);
199 PRINT_FLAG(flags, MFLAG, platform);
200 PRINT_FLAG(flags, PFLAG, arch);
201 PRINT_FLAG(flags, IFLAG, ident);
202 PRINT_FLAG(flags, KFLAG, kernvers);
203 PRINT_FLAG(flags, UFLAG, uservers);
204 PRINT_FLAG(flags, BFLAG, buildid);
205 printf("\n");
206 }
207
208 #define NATIVE_SYSCTL2_GET(var,mib0,mib1) \
209 static void \
210 native_##var(void) \
211 { \
212 int mib[] = { (mib0), (mib1) }; \
213 size_t len; \
214 static char buf[1024]; \
215 char **varp = &(var); \
216 \
217 len = sizeof buf; \
218 if (sysctl(mib, sizeof mib / sizeof mib[0], \
219 &buf, &len, NULL, 0) == -1) \
220 err(1, "sysctl");
221
222 #define NATIVE_SYSCTLNAME_GET(var,name) \
223 static void \
224 native_##var(void) \
225 { \
226 size_t len; \
227 static char buf[1024]; \
228 char **varp = &(var); \
229 \
230 len = sizeof buf; \
231 if (sysctlbyname(name, &buf, &len, NULL,\
232 0) == -1) \
233 err(1, "sysctlbyname");
234
235 #define NATIVE_SET \
236 *varp = buf; \
237 return; \
238 } struct __hack
239
240 #define NATIVE_BUFFER (buf)
241 #define NATIVE_LENGTH (len)
242
NATIVE_SYSCTL2_GET(sysname,CTL_KERN,KERN_OSTYPE)243 NATIVE_SYSCTL2_GET(sysname, CTL_KERN, KERN_OSTYPE) {
244 } NATIVE_SET;
245
NATIVE_SYSCTL2_GET(hostname,CTL_KERN,KERN_HOSTNAME)246 NATIVE_SYSCTL2_GET(hostname, CTL_KERN, KERN_HOSTNAME) {
247 } NATIVE_SET;
248
NATIVE_SYSCTL2_GET(release,CTL_KERN,KERN_OSRELEASE)249 NATIVE_SYSCTL2_GET(release, CTL_KERN, KERN_OSRELEASE) {
250 } NATIVE_SET;
251
NATIVE_SYSCTL2_GET(version,CTL_KERN,KERN_VERSION)252 NATIVE_SYSCTL2_GET(version, CTL_KERN, KERN_VERSION) {
253 size_t n;
254 char *p;
255
256 p = NATIVE_BUFFER;
257 n = NATIVE_LENGTH;
258 for (; n--; ++p)
259 if (*p == '\n' || *p == '\t') {
260 if (n > 1)
261 *p = ' ';
262 else
263 *p = '\0';
264 }
265 } NATIVE_SET;
266
NATIVE_SYSCTL2_GET(platform,CTL_HW,HW_MACHINE)267 NATIVE_SYSCTL2_GET(platform, CTL_HW, HW_MACHINE) {
268 } NATIVE_SET;
269
NATIVE_SYSCTL2_GET(arch,CTL_HW,HW_MACHINE_ARCH)270 NATIVE_SYSCTL2_GET(arch, CTL_HW, HW_MACHINE_ARCH) {
271 } NATIVE_SET;
272
273 NATIVE_SYSCTLNAME_GET(ident, "kern.ident") {
274 } NATIVE_SET;
275
276 NATIVE_SYSCTLNAME_GET(buildid, "kern.build_id") {
277 } NATIVE_SET;
278
279 static void
native_uservers(void)280 native_uservers(void)
281 {
282 static char buf[128];
283
284 snprintf(buf, sizeof(buf), "%d", __FreeBSD_version);
285 uservers = buf;
286 }
287
288 static void
native_kernvers(void)289 native_kernvers(void)
290 {
291 static char buf[128];
292
293 snprintf(buf, sizeof(buf), "%d", getosreldate());
294 kernvers = buf;
295 }
296
297 static void
usage(void)298 usage(void)
299 {
300 fprintf(stderr, "usage: uname [-abiKmnoprsUv]\n");
301 exit(1);
302 }
303