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 44 int 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