1/*-
2 * Copyright (c) 1994
3 *	The Regents of the University of California.  All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 *    notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 *    notice, this list of conditions and the following disclaimer in the
12 *    documentation and/or other materials provided with the distribution.
13 * 4. Neither the name of the University nor the names of its contributors
14 *    may be used to endorse or promote products derived from this software
15 *    without specific prior written permission.
16 *
17 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
18 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
19 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
20 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
21 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
22 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
23 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
24 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
25 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
26 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
27 * SUCH DAMAGE.
28 */
29
30#if defined(LIBC_SCCS) && !defined(lint)
31/*static char sccsid[] = "From: @(#)uname.c	8.1 (Berkeley) 1/4/94";*/
32#endif /* LIBC_SCCS and not lint */
33#include <sys/cdefs.h>
34__FBSDID("$FreeBSD$");
35
36#include <sys/param.h>
37#include <sys/sysctl.h>
38#include <sys/utsname.h>
39#include <errno.h>
40#include <stdlib.h>
41#include <string.h>
42
43int
44__xuname(int namesize, void *namebuf)
45{
46	int mib[2], rval;
47	size_t len;
48	char *p, *q;
49	int oerrno;
50
51	rval = 0;
52	q = (char *)namebuf;
53
54	mib[0] = CTL_KERN;
55
56	if ((p = getenv("UNAME_s")))
57		strlcpy(q, p, namesize);
58	else {
59		mib[1] = KERN_OSTYPE;
60		len = namesize;
61		oerrno = errno;
62		if (sysctl(mib, 2, q, &len, NULL, 0) == -1) {
63			if (errno == ENOMEM)
64				errno = oerrno;
65			else
66				rval = -1;
67		}
68		q[namesize - 1] = '\0';
69	}
70	q += namesize;
71
72	mib[1] = KERN_HOSTNAME;
73	len = namesize;
74	oerrno = errno;
75	if (sysctl(mib, 2, q, &len, NULL, 0) == -1) {
76		if (errno == ENOMEM)
77			errno = oerrno;
78		else
79			rval = -1;
80	}
81	q[namesize - 1] = '\0';
82	q += namesize;
83
84	if ((p = getenv("UNAME_r")))
85		strlcpy(q, p, namesize);
86	else {
87		mib[1] = KERN_OSRELEASE;
88		len = namesize;
89		oerrno = errno;
90		if (sysctl(mib, 2, q, &len, NULL, 0) == -1) {
91			if (errno == ENOMEM)
92				errno = oerrno;
93			else
94				rval = -1;
95		}
96		q[namesize - 1] = '\0';
97	}
98	q += namesize;
99
100	if ((p = getenv("UNAME_v")))
101		strlcpy(q, p, namesize);
102	else {
103
104		/*
105		 * The version may have newlines in it, turn them into
106		 * spaces.
107		 */
108		mib[1] = KERN_VERSION;
109		len = namesize;
110		oerrno = errno;
111		if (sysctl(mib, 2, q, &len, NULL, 0) == -1) {
112			if (errno == ENOMEM)
113				errno = oerrno;
114			else
115				rval = -1;
116		}
117		q[namesize - 1] = '\0';
118		for (p = q; len--; ++p) {
119			if (*p == '\n' || *p == '\t') {
120				if (len > 1)
121					*p = ' ';
122				else
123					*p = '\0';
124			}
125		}
126	}
127	q += namesize;
128
129	if ((p = getenv("UNAME_m")))
130		strlcpy(q, p, namesize);
131	else {
132		mib[0] = CTL_HW;
133		mib[1] = HW_MACHINE;
134		len = namesize;
135		oerrno = errno;
136		if (sysctl(mib, 2, q, &len, NULL, 0) == -1) {
137			if (errno == ENOMEM)
138				errno = oerrno;
139			else
140				rval = -1;
141		}
142		q[namesize - 1] = '\0';
143	}
144
145	return (rval);
146}
147