1/*-
2 * SPDX-License-Identifier: BSD-3-Clause
3 *
4 * Copyright (c) 1994
5 *	The Regents of the University of California.  All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice, this list of conditions and the following disclaimer in the
14 *    documentation and/or other materials provided with the distribution.
15 * 3. Neither the name of the University nor the names of its contributors
16 *    may be used to endorse or promote products derived from this software
17 *    without specific prior written permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 *
31 * From: @(#)uname.c	8.1 (Berkeley) 1/4/94
32 */
33
34#include <sys/cdefs.h>
35__FBSDID("$FreeBSD$");
36
37#include <sys/param.h>
38#include <sys/sysctl.h>
39#include <sys/utsname.h>
40#include <errno.h>
41#include <stdlib.h>
42#include <string.h>
43
44int
45__xuname(int namesize, void *namebuf)
46{
47	int mib[2], rval;
48	size_t len;
49	char *p, *q;
50	int oerrno;
51
52	rval = 0;
53	q = (char *)namebuf;
54
55	mib[0] = CTL_KERN;
56
57	if ((p = getenv("UNAME_s")))
58		strlcpy(q, p, namesize);
59	else {
60		mib[1] = KERN_OSTYPE;
61		len = namesize;
62		oerrno = errno;
63		if (sysctl(mib, 2, q, &len, NULL, 0) == -1) {
64			if (errno == ENOMEM)
65				errno = oerrno;
66			else
67				rval = -1;
68		}
69		q[namesize - 1] = '\0';
70	}
71	q += namesize;
72
73	mib[1] = KERN_HOSTNAME;
74	len = namesize;
75	oerrno = errno;
76	if (sysctl(mib, 2, q, &len, NULL, 0) == -1) {
77		if (errno == ENOMEM)
78			errno = oerrno;
79		else
80			rval = -1;
81	}
82	q[namesize - 1] = '\0';
83	q += namesize;
84
85	if ((p = getenv("UNAME_r")))
86		strlcpy(q, p, namesize);
87	else {
88		mib[1] = KERN_OSRELEASE;
89		len = namesize;
90		oerrno = errno;
91		if (sysctl(mib, 2, q, &len, NULL, 0) == -1) {
92			if (errno == ENOMEM)
93				errno = oerrno;
94			else
95				rval = -1;
96		}
97		q[namesize - 1] = '\0';
98	}
99	q += namesize;
100
101	if ((p = getenv("UNAME_v")))
102		strlcpy(q, p, namesize);
103	else {
104
105		/*
106		 * The version may have newlines in it, turn them into
107		 * spaces.
108		 */
109		mib[1] = KERN_VERSION;
110		len = namesize;
111		oerrno = errno;
112		if (sysctl(mib, 2, q, &len, NULL, 0) == -1) {
113			if (errno == ENOMEM)
114				errno = oerrno;
115			else
116				rval = -1;
117		}
118		q[namesize - 1] = '\0';
119		for (p = q; len--; ++p) {
120			if (*p == '\n' || *p == '\t') {
121				if (len > 1)
122					*p = ' ';
123				else
124					*p = '\0';
125			}
126		}
127	}
128	q += namesize;
129
130	if ((p = getenv("UNAME_m")))
131		strlcpy(q, p, namesize);
132	else {
133		mib[0] = CTL_HW;
134		mib[1] = HW_MACHINE;
135		len = namesize;
136		oerrno = errno;
137		if (sysctl(mib, 2, q, &len, NULL, 0) == -1) {
138			if (errno == ENOMEM)
139				errno = oerrno;
140			else
141				rval = -1;
142		}
143		q[namesize - 1] = '\0';
144	}
145
146	return (rval);
147}
148