uname(1) is still used in a few places during buildworld,
[dragonfly.git] / usr.bin / uname / uname.c
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1/*-
2 * Copyright (c) 2002 Juli Mallett.
3 * Copyright (c) 1993
4 * The Regents of the University of California. All rights reserved.
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
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. All advertising materials mentioning features or use of this software
15 * must display the following acknowledgement:
16 * This product includes software developed by the University of
17 * California, Berkeley and its contributors.
18 * 4. Neither the name of the University nor the names of its contributors
19 * may be used to endorse or promote products derived from this software
20 * without specific prior written permission.
21 *
22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
32 * SUCH DAMAGE.
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33 *
34 * @(#) Copyright (c) 1993 The Regents of the University of California. All rights reserved.
35 * @(#)uname.c 8.2 (Berkeley) 5/4/95
36 * $FreeBSD: src/usr.bin/uname/uname.c,v 1.4.6.2 2002/10/17 07:47:29 jmallett Exp $
a96913f0 37 * $DragonFly: src/usr.bin/uname/uname.c,v 1.5 2007/01/04 14:19:03 y0netan1 Exp $
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38 */
39
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40#include <sys/param.h>
41#include <sys/sysctl.h>
42
43#include <err.h>
44#include <stdio.h>
45#include <stdlib.h>
46#include <unistd.h>
47
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48#ifndef HW_MACHINE_UNAME
49#define HW_MACHINE_UNAME HW_MACHINE
50#endif
51
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52#define MFLAG 0x01
53#define NFLAG 0x02
54#define PFLAG 0x04
55#define RFLAG 0x08
56#define SFLAG 0x10
57#define VFLAG 0x20
cf75fe93 58#define IFLAG 0x40
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59
60typedef void (*get_t)(void);
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61get_t get_ident, get_platform, get_hostname, get_arch, get_release, get_sysname, get_version;
62
63void native_ident(void);
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64void native_platform(void);
65void native_hostname(void);
66void native_arch(void);
67void native_release(void);
68void native_sysname(void);
69void native_version(void);
70void print_uname(u_int);
71void setup_get(void);
72void usage(void);
73
cf75fe93 74char *ident, *platform, *hostname, *arch, *release, *sysname, *version;
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75int space;
76
77int
78main(int argc, char *argv[])
79{
80 u_int flags;
81 int ch;
82
83 setup_get();
84 flags = 0;
85
cf75fe93 86 while ((ch = getopt(argc, argv, "aimnprsv")) != -1)
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87 switch(ch) {
88 case 'a':
89 flags |= (MFLAG | NFLAG | RFLAG | SFLAG | VFLAG);
90 break;
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91 case 'i':
92 flags |= IFLAG;
93 break;
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94 case 'm':
95 flags |= MFLAG;
96 break;
97 case 'n':
98 flags |= NFLAG;
99 break;
100 case 'p':
101 flags |= PFLAG;
102 break;
103 case 'r':
104 flags |= RFLAG;
105 break;
106 case 's':
107 flags |= SFLAG;
108 break;
109 case 'v':
110 flags |= VFLAG;
111 break;
112 case '?':
113 default:
114 usage();
115 }
116
117 argc -= optind;
118 argv += optind;
119
120 if (argc)
121 usage();
122
123 if (!flags)
124 flags |= SFLAG;
125
126 print_uname(flags);
127 exit(0);
128}
129
130#define CHECK_ENV(opt,var) \
131do { \
132 if ((var = getenv("UNAME_" opt)) == NULL) { \
133 get_##var = native_##var; \
134 } else { \
135 get_##var = (get_t)NULL; \
136 } \
137} while (0)
138
139void
140setup_get(void)
141{
142 CHECK_ENV("s", sysname);
143 CHECK_ENV("n", hostname);
144 CHECK_ENV("r", release);
145 CHECK_ENV("v", version);
146 CHECK_ENV("m", platform);
147 CHECK_ENV("p", arch);
cf75fe93 148 CHECK_ENV("i", ident);
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149}
150
151#define PRINT_FLAG(flags,flag,var) \
152 if ((flags & flag) == flag) { \
153 if (space) \
154 printf(" "); \
155 else \
156 space++; \
157 if (get_##var != NULL) \
158 (*get_##var)(); \
159 printf("%s", var); \
160 }
161
162void
163print_uname(u_int flags)
164{
165 PRINT_FLAG(flags, SFLAG, sysname);
166 PRINT_FLAG(flags, NFLAG, hostname);
167 PRINT_FLAG(flags, RFLAG, release);
168 PRINT_FLAG(flags, VFLAG, version);
169 PRINT_FLAG(flags, MFLAG, platform);
170 PRINT_FLAG(flags, PFLAG, arch);
cf75fe93 171 PRINT_FLAG(flags, IFLAG, ident);
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172 printf("\n");
173}
174
175#define NATIVE_SYSCTL2_GET(var,mib0,mib1) \
176void \
177native_##var(void) \
178{ \
179 int mib[] = { (mib0), (mib1) }; \
180 size_t len; \
181 static char buf[1024]; \
182 char **varp = &(var); \
183 \
184 len = sizeof buf; \
185 if (sysctl(mib, sizeof mib / sizeof mib[0], \
186 &buf, &len, NULL, 0) == -1) \
187 err(1, "sysctl");
188
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189#define NATIVE_SYSCTLNAME_GET(var,name) \
190void \
191native_##var(void) \
192{ \
193 size_t len; \
194 static char buf[1024]; \
195 char **varp = &(var); \
196 \
197 len = sizeof buf; \
198 if (sysctlbyname(name, &buf, &len, NULL,\
199 0) == -1) \
200 err(1, "sysctlbyname");
201
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202#define NATIVE_SET \
203 *varp = buf; \
204 return; \
205} struct __hack
206
207#define NATIVE_BUFFER (buf)
208#define NATIVE_LENGTH (len)
209
210NATIVE_SYSCTL2_GET(sysname, CTL_KERN, KERN_OSTYPE) {
211} NATIVE_SET;
212
213NATIVE_SYSCTL2_GET(hostname, CTL_KERN, KERN_HOSTNAME) {
214} NATIVE_SET;
215
216NATIVE_SYSCTL2_GET(release, CTL_KERN, KERN_OSRELEASE) {
217} NATIVE_SET;
218
219NATIVE_SYSCTL2_GET(version, CTL_KERN, KERN_VERSION) {
220 size_t n;
221 char *p;
222
223 p = NATIVE_BUFFER;
224 n = NATIVE_LENGTH;
225 for (; n--; ++p)
226 if (*p == '\n' || *p == '\t')
227 *p = ' ';
228} NATIVE_SET;
229
08efc527 230NATIVE_SYSCTL2_GET(platform, CTL_HW, HW_MACHINE_UNAME) {
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231} NATIVE_SET;
232
233NATIVE_SYSCTL2_GET(arch, CTL_HW, HW_MACHINE_ARCH) {
234} NATIVE_SET;
235
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236NATIVE_SYSCTLNAME_GET(ident, "kern.ident") {
237} NATIVE_SET;
238
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239void
240usage(void)
241{
cf75fe93 242 fprintf(stderr, "usage: uname [-aimnprsv]\n");
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243 exit(1);
244}