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.
33 */
34
35#include <sys/cdefs.h>
36
37__FBSDID("$FreeBSD$");
38
39#ifndef lint
40static const char copyright[] =
41"@(#) Copyright (c) 1993\n\
42	The Regents of the University of California.  All rights reserved.\n";
43#endif
44
45#ifndef lint
46static const char sccsid[] = "@(#)uname.c	8.2 (Berkeley) 5/4/95";
47#endif
48
49#include <sys/param.h>
50#include <sys/sysctl.h>
51
52#include <err.h>
53#include <stdio.h>
54#include <stdlib.h>
55#include <unistd.h>
56
57#include <osreldate.h>
58
59#define	MFLAG	0x01
60#define	NFLAG	0x02
61#define	PFLAG	0x04
62#define	RFLAG	0x08
63#define	SFLAG	0x10
64#define	VFLAG	0x20
65#define	IFLAG	0x40
66#define	UFLAG	0x80
67#define	KFLAG	0x100
68
69typedef void (*get_t)(void);
70static get_t get_ident, get_platform, get_hostname, get_arch,
71    get_release, get_sysname, get_kernvers, get_uservers, get_version;
72
73static void native_ident(void);
74static void native_platform(void);
75static void native_hostname(void);
76static void native_arch(void);
77static void native_release(void);
78static void native_sysname(void);
79static void native_version(void);
80static void native_kernvers(void);
81static void native_uservers(void);
82static void print_uname(u_int);
83static void setup_get(void);
84static void usage(void);
85
86static char *ident, *platform, *hostname, *arch, *release, *sysname, *version, *kernvers, *uservers;
87static int space;
88
89int
90main(int argc, char *argv[])
91{
92	u_int flags;
93	int ch;
94
95	setup_get();
96	flags = 0;
97
98	while ((ch = getopt(argc, argv, "aiKmnoprsUv")) != -1)
99		switch(ch) {
100		case 'a':
101			flags |= (MFLAG | NFLAG | RFLAG | SFLAG | VFLAG);
102			break;
103		case 'i':
104			flags |= IFLAG;
105			break;
106		case 'K':
107			flags |= KFLAG;
108			break;
109		case 'm':
110			flags |= MFLAG;
111			break;
112		case 'n':
113			flags |= NFLAG;
114			break;
115		case 'p':
116			flags |= PFLAG;
117			break;
118		case 'r':
119			flags |= RFLAG;
120			break;
121		case 's':
122		case 'o':
123			flags |= SFLAG;
124			break;
125		case 'U':
126			flags |= UFLAG;
127			break;
128		case 'v':
129			flags |= VFLAG;
130			break;
131		case '?':
132		default:
133			usage();
134		}
135
136	argc -= optind;
137	argv += optind;
138
139	if (argc)
140		usage();
141
142	if (!flags)
143		flags |= SFLAG;
144
145	print_uname(flags);
146	exit(0);
147}
148
149#define	CHECK_ENV(opt,var)				\
150do {							\
151	if ((var = getenv("UNAME_" opt)) == NULL) {	\
152		get_##var = native_##var;		\
153	} else {					\
154		get_##var = (get_t)NULL;		\
155	}						\
156} while (0)
157
158static void
159setup_get(void)
160{
161	CHECK_ENV("s", sysname);
162	CHECK_ENV("n", hostname);
163	CHECK_ENV("r", release);
164	CHECK_ENV("v", version);
165	CHECK_ENV("m", platform);
166	CHECK_ENV("p", arch);
167	CHECK_ENV("i", ident);
168	CHECK_ENV("K", kernvers);
169	CHECK_ENV("U", uservers);
170}
171
172#define	PRINT_FLAG(flags,flag,var)		\
173	if ((flags & flag) == flag) {		\
174		if (space)			\
175			printf(" ");		\
176		else				\
177			space++;		\
178		if (get_##var != NULL)		\
179			(*get_##var)();		\
180		printf("%s", var);		\
181	}
182
183static void
184print_uname(u_int flags)
185{
186	PRINT_FLAG(flags, SFLAG, sysname);
187	PRINT_FLAG(flags, NFLAG, hostname);
188	PRINT_FLAG(flags, RFLAG, release);
189	PRINT_FLAG(flags, VFLAG, version);
190	PRINT_FLAG(flags, MFLAG, platform);
191	PRINT_FLAG(flags, PFLAG, arch);
192	PRINT_FLAG(flags, IFLAG, ident);
193	PRINT_FLAG(flags, KFLAG, kernvers);
194	PRINT_FLAG(flags, UFLAG, uservers);
195	printf("\n");
196}
197
198#define	NATIVE_SYSCTL2_GET(var,mib0,mib1)	\
199static void					\
200native_##var(void)				\
201{						\
202	int mib[] = { (mib0), (mib1) };		\
203	size_t len;				\
204	static char buf[1024];			\
205	char **varp = &(var);			\
206						\
207	len = sizeof buf;			\
208	if (sysctl(mib, sizeof mib / sizeof mib[0],	\
209	   &buf, &len, NULL, 0) == -1)		\
210		err(1, "sysctl");
211
212#define	NATIVE_SYSCTLNAME_GET(var,name)		\
213static void					\
214native_##var(void)				\
215{						\
216	size_t len;				\
217	static char buf[1024];			\
218	char **varp = &(var);			\
219						\
220	len = sizeof buf;			\
221	if (sysctlbyname(name, &buf, &len, NULL,\
222	    0) == -1)				\
223		err(1, "sysctlbyname");
224
225#define	NATIVE_SET				\
226	*varp = buf;				\
227	return;					\
228}	struct __hack
229
230#define	NATIVE_BUFFER	(buf)
231#define	NATIVE_LENGTH	(len)
232
233NATIVE_SYSCTL2_GET(sysname, CTL_KERN, KERN_OSTYPE) {
234} NATIVE_SET;
235
236NATIVE_SYSCTL2_GET(hostname, CTL_KERN, KERN_HOSTNAME) {
237} NATIVE_SET;
238
239NATIVE_SYSCTL2_GET(release, CTL_KERN, KERN_OSRELEASE) {
240} NATIVE_SET;
241
242NATIVE_SYSCTL2_GET(version, CTL_KERN, KERN_VERSION) {
243	size_t n;
244	char *p;
245
246	p = NATIVE_BUFFER;
247	n = NATIVE_LENGTH;
248	for (; n--; ++p)
249		if (*p == '\n' || *p == '\t')
250			*p = ' ';
251} NATIVE_SET;
252
253NATIVE_SYSCTL2_GET(platform, CTL_HW, HW_MACHINE) {
254} NATIVE_SET;
255
256NATIVE_SYSCTL2_GET(arch, CTL_HW, HW_MACHINE_ARCH) {
257} NATIVE_SET;
258
259NATIVE_SYSCTLNAME_GET(ident, "kern.ident") {
260} NATIVE_SET;
261
262static void
263native_uservers(void)
264{
265	static char buf[128];
266
267	snprintf(buf, sizeof(buf), "%d", __FreeBSD_version);
268	uservers = buf;
269}
270
271static void
272native_kernvers(void)
273{
274	static char buf[128];
275
276	snprintf(buf, sizeof(buf), "%d", getosreldate());
277	kernvers = buf;
278}
279
280static void
281usage(void)
282{
283	fprintf(stderr, "usage: uname [-aiKmnoprsUv]\n");
284	exit(1);
285}
286