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/param.h>
38 #include <sys/sysctl.h>
39
40 #include <err.h>
41 #include <stdio.h>
42 #include <stdlib.h>
43 #include <unistd.h>
44
45 #include <osreldate.h>
46
47 #define MFLAG 0x01
48 #define NFLAG 0x02
49 #define PFLAG 0x04
50 #define RFLAG 0x08
51 #define SFLAG 0x10
52 #define VFLAG 0x20
53 #define IFLAG 0x40
54 #define UFLAG 0x80
55 #define KFLAG 0x100
56 #define BFLAG 0x200
57
58 typedef void (*get_t)(void);
59 static get_t get_buildid, get_ident, get_platform, get_hostname, get_arch,
60 get_release, get_sysname, get_kernvers, get_uservers, get_version;
61
62 static void native_ident(void);
63 static void native_platform(void);
64 static void native_hostname(void);
65 static void native_arch(void);
66 static void native_release(void);
67 static void native_sysname(void);
68 static void native_version(void);
69 static void native_kernvers(void);
70 static void native_uservers(void);
71 static void native_buildid(void);
72 static void print_uname(u_int);
73 static void setup_get(void);
74 static void usage(void) __dead2;
75
76 static char *buildid, *ident, *platform, *hostname, *arch, *release, *sysname,
77 *version, *kernvers, *uservers;
78 static int space;
79
80 int
main(int argc,char * argv[])81 main(int argc, char *argv[])
82 {
83 u_int flags;
84 int ch;
85
86 setup_get();
87 flags = 0;
88
89 while ((ch = getopt(argc, argv, "abiKmnoprsUv")) != -1)
90 switch(ch) {
91 case 'a':
92 flags |= (MFLAG | NFLAG | RFLAG | SFLAG | VFLAG);
93 break;
94 case 'b':
95 flags |= BFLAG;
96 break;
97 case 'i':
98 flags |= IFLAG;
99 break;
100 case 'K':
101 flags |= KFLAG;
102 break;
103 case 'm':
104 flags |= MFLAG;
105 break;
106 case 'n':
107 flags |= NFLAG;
108 break;
109 case 'p':
110 flags |= PFLAG;
111 break;
112 case 'r':
113 flags |= RFLAG;
114 break;
115 case 's':
116 case 'o':
117 flags |= SFLAG;
118 break;
119 case 'U':
120 flags |= UFLAG;
121 break;
122 case 'v':
123 flags |= VFLAG;
124 break;
125 case '?':
126 default:
127 usage();
128 }
129
130 argc -= optind;
131 argv += optind;
132
133 if (argc)
134 usage();
135
136 if (!flags)
137 flags |= SFLAG;
138
139 print_uname(flags);
140 exit(0);
141 }
142
143 #define CHECK_ENV(opt,var) \
144 do { \
145 if ((var = getenv("UNAME_" opt)) == NULL) { \
146 get_##var = native_##var; \
147 } else { \
148 get_##var = (get_t)NULL; \
149 } \
150 } while (0)
151
152 static void
setup_get(void)153 setup_get(void)
154 {
155 CHECK_ENV("s", sysname);
156 CHECK_ENV("n", hostname);
157 CHECK_ENV("r", release);
158 CHECK_ENV("v", version);
159 CHECK_ENV("m", platform);
160 CHECK_ENV("p", arch);
161 CHECK_ENV("i", ident);
162 CHECK_ENV("K", kernvers);
163 CHECK_ENV("U", uservers);
164 CHECK_ENV("b", buildid);
165 }
166
167 #define PRINT_FLAG(flags,flag,var) \
168 if ((flags & flag) == flag) { \
169 if (space) \
170 printf(" "); \
171 else \
172 space++; \
173 if (get_##var != NULL) \
174 (*get_##var)(); \
175 printf("%s", var); \
176 }
177
178 static void
print_uname(u_int flags)179 print_uname(u_int flags)
180 {
181 PRINT_FLAG(flags, SFLAG, sysname);
182 PRINT_FLAG(flags, NFLAG, hostname);
183 PRINT_FLAG(flags, RFLAG, release);
184 PRINT_FLAG(flags, VFLAG, version);
185 PRINT_FLAG(flags, MFLAG, platform);
186 PRINT_FLAG(flags, PFLAG, arch);
187 PRINT_FLAG(flags, IFLAG, ident);
188 PRINT_FLAG(flags, KFLAG, kernvers);
189 PRINT_FLAG(flags, UFLAG, uservers);
190 PRINT_FLAG(flags, BFLAG, buildid);
191 printf("\n");
192 }
193
194 #define NATIVE_SYSCTL2_GET(var,mib0,mib1) \
195 static void \
196 native_##var(void) \
197 { \
198 int mib[] = { (mib0), (mib1) }; \
199 size_t len; \
200 static char buf[1024]; \
201 char **varp = &(var); \
202 \
203 len = sizeof buf; \
204 if (sysctl(mib, sizeof mib / sizeof mib[0], \
205 &buf, &len, NULL, 0) == -1) \
206 err(1, "sysctl");
207
208 #define NATIVE_SYSCTLNAME_GET(var,name) \
209 static void \
210 native_##var(void) \
211 { \
212 size_t len; \
213 static char buf[1024]; \
214 char **varp = &(var); \
215 \
216 len = sizeof buf; \
217 if (sysctlbyname(name, &buf, &len, NULL,\
218 0) == -1) \
219 err(1, "sysctlbyname");
220
221 #define NATIVE_SET \
222 *varp = buf; \
223 return; \
224 } struct __hack
225
226 #define NATIVE_BUFFER (buf)
227 #define NATIVE_LENGTH (len)
228
NATIVE_SYSCTL2_GET(sysname,CTL_KERN,KERN_OSTYPE)229 NATIVE_SYSCTL2_GET(sysname, CTL_KERN, KERN_OSTYPE) {
230 } NATIVE_SET;
231
NATIVE_SYSCTL2_GET(hostname,CTL_KERN,KERN_HOSTNAME)232 NATIVE_SYSCTL2_GET(hostname, CTL_KERN, KERN_HOSTNAME) {
233 } NATIVE_SET;
234
NATIVE_SYSCTL2_GET(release,CTL_KERN,KERN_OSRELEASE)235 NATIVE_SYSCTL2_GET(release, CTL_KERN, KERN_OSRELEASE) {
236 } NATIVE_SET;
237
NATIVE_SYSCTL2_GET(version,CTL_KERN,KERN_VERSION)238 NATIVE_SYSCTL2_GET(version, CTL_KERN, KERN_VERSION) {
239 size_t n;
240 char *p;
241
242 p = NATIVE_BUFFER;
243 n = NATIVE_LENGTH;
244 for (; n--; ++p)
245 if (*p == '\n' || *p == '\t') {
246 if (n > 1)
247 *p = ' ';
248 else
249 *p = '\0';
250 }
251 } NATIVE_SET;
252
NATIVE_SYSCTL2_GET(platform,CTL_HW,HW_MACHINE)253 NATIVE_SYSCTL2_GET(platform, CTL_HW, HW_MACHINE) {
254 } NATIVE_SET;
255
NATIVE_SYSCTL2_GET(arch,CTL_HW,HW_MACHINE_ARCH)256 NATIVE_SYSCTL2_GET(arch, CTL_HW, HW_MACHINE_ARCH) {
257 } NATIVE_SET;
258
259 NATIVE_SYSCTLNAME_GET(ident, "kern.ident") {
260 } NATIVE_SET;
261
262 NATIVE_SYSCTLNAME_GET(buildid, "kern.build_id") {
263 } NATIVE_SET;
264
265 static void
native_uservers(void)266 native_uservers(void)
267 {
268 static char buf[128];
269
270 snprintf(buf, sizeof(buf), "%d", __FreeBSD_version);
271 uservers = buf;
272 }
273
274 static void
native_kernvers(void)275 native_kernvers(void)
276 {
277 static char buf[128];
278
279 snprintf(buf, sizeof(buf), "%d", getosreldate());
280 kernvers = buf;
281 }
282
283 static void
usage(void)284 usage(void)
285 {
286 fprintf(stderr, "usage: uname [-abiKmnoprsUv]\n");
287 exit(1);
288 }
289