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: stable/12/lib/libc/gen/__xuname.c 335898 2018-07-03 17:31:45Z jhb $");
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
44 int
__xuname(int namesize,void * namebuf)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