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
32 #include <sys/param.h>
33 #include <sys/sysctl.h>
34 #include <sys/utsname.h>
35 #include <errno.h>
36 #include <stdlib.h>
37 #include <string.h>
38
39 int
__xuname(int namesize,void * namebuf)40 __xuname(int namesize, void *namebuf)
41 {
42 int mib[2], rval;
43 size_t len;
44 char *p, *q;
45 int oerrno;
46
47 rval = 0;
48 q = (char *)namebuf;
49
50 mib[0] = CTL_KERN;
51
52 if ((p = getenv("UNAME_s")))
53 strlcpy(q, p, namesize);
54 else {
55 mib[1] = KERN_OSTYPE;
56 len = namesize;
57 oerrno = errno;
58 if (sysctl(mib, 2, q, &len, NULL, 0) == -1) {
59 if (errno == ENOMEM)
60 errno = oerrno;
61 else
62 rval = -1;
63 }
64 q[namesize - 1] = '\0';
65 }
66 q += namesize;
67
68 mib[1] = KERN_HOSTNAME;
69 len = namesize;
70 oerrno = errno;
71 if (sysctl(mib, 2, q, &len, NULL, 0) == -1) {
72 if (errno == ENOMEM)
73 errno = oerrno;
74 else
75 rval = -1;
76 }
77 q[namesize - 1] = '\0';
78 q += namesize;
79
80 if ((p = getenv("UNAME_r")))
81 strlcpy(q, p, namesize);
82 else {
83 mib[1] = KERN_OSRELEASE;
84 len = namesize;
85 oerrno = errno;
86 if (sysctl(mib, 2, q, &len, NULL, 0) == -1) {
87 if (errno == ENOMEM)
88 errno = oerrno;
89 else
90 rval = -1;
91 }
92 q[namesize - 1] = '\0';
93 }
94 q += namesize;
95
96 if ((p = getenv("UNAME_v")))
97 strlcpy(q, p, namesize);
98 else {
99
100 /*
101 * The version may have newlines in it, turn them into
102 * spaces.
103 */
104 mib[1] = KERN_VERSION;
105 len = namesize;
106 oerrno = errno;
107 if (sysctl(mib, 2, q, &len, NULL, 0) == -1) {
108 if (errno == ENOMEM)
109 errno = oerrno;
110 else
111 rval = -1;
112 }
113 q[namesize - 1] = '\0';
114 for (p = q; len--; ++p) {
115 if (*p == '\n' || *p == '\t') {
116 if (len > 1)
117 *p = ' ';
118 else
119 *p = '\0';
120 }
121 }
122 }
123 q += namesize;
124
125 if ((p = getenv("UNAME_m")))
126 strlcpy(q, p, namesize);
127 else {
128 mib[0] = CTL_HW;
129 mib[1] = HW_MACHINE;
130 len = namesize;
131 oerrno = errno;
132 if (sysctl(mib, 2, q, &len, NULL, 0) == -1) {
133 if (errno == ENOMEM)
134 errno = oerrno;
135 else
136 rval = -1;
137 }
138 q[namesize - 1] = '\0';
139 }
140
141 return (rval);
142 }
143