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 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