1 /*- 2 * SPDX-License-Identifier: BSD-4-Clause 3 * 4 * Copyright (c) 2002 Juli Mallett. 5 * Copyright (c) 1993 6 * The Regents of the University of California. All rights reserved. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 */ 36 37 #include <sys/cdefs.h> 38 39 __FBSDID("$FreeBSD$"); 40 41 #ifndef lint 42 static const char copyright[] = 43 "@(#) Copyright (c) 1993\n\ 44 The Regents of the University of California. All rights reserved.\n"; 45 #endif 46 47 #ifndef lint 48 static const char sccsid[] = "@(#)uname.c 8.2 (Berkeley) 5/4/95"; 49 #endif 50 51 #include <sys/param.h> 52 #include <sys/sysctl.h> 53 54 #include <err.h> 55 #include <stdio.h> 56 #include <stdlib.h> 57 #include <unistd.h> 58 59 #include <osreldate.h> 60 61 #define MFLAG 0x01 62 #define NFLAG 0x02 63 #define PFLAG 0x04 64 #define RFLAG 0x08 65 #define SFLAG 0x10 66 #define VFLAG 0x20 67 #define IFLAG 0x40 68 #define UFLAG 0x80 69 #define KFLAG 0x100 70 71 typedef void (*get_t)(void); 72 static get_t get_ident, get_platform, get_hostname, get_arch, 73 get_release, get_sysname, get_kernvers, get_uservers, get_version; 74 75 static void native_ident(void); 76 static void native_platform(void); 77 static void native_hostname(void); 78 static void native_arch(void); 79 static void native_release(void); 80 static void native_sysname(void); 81 static void native_version(void); 82 static void native_kernvers(void); 83 static void native_uservers(void); 84 static void print_uname(u_int); 85 static void setup_get(void); 86 static void usage(void); 87 88 static char *ident, *platform, *hostname, *arch, *release, *sysname, *version, *kernvers, *uservers; 89 static int space; 90 91 int 92 main(int argc, char *argv[]) 93 { 94 u_int flags; 95 int ch; 96 97 setup_get(); 98 flags = 0; 99 100 while ((ch = getopt(argc, argv, "aiKmnoprsUv")) != -1) 101 switch(ch) { 102 case 'a': 103 flags |= (MFLAG | NFLAG | RFLAG | SFLAG | VFLAG); 104 break; 105 case 'i': 106 flags |= IFLAG; 107 break; 108 case 'K': 109 flags |= KFLAG; 110 break; 111 case 'm': 112 flags |= MFLAG; 113 break; 114 case 'n': 115 flags |= NFLAG; 116 break; 117 case 'p': 118 flags |= PFLAG; 119 break; 120 case 'r': 121 flags |= RFLAG; 122 break; 123 case 's': 124 case 'o': 125 flags |= SFLAG; 126 break; 127 case 'U': 128 flags |= UFLAG; 129 break; 130 case 'v': 131 flags |= VFLAG; 132 break; 133 case '?': 134 default: 135 usage(); 136 } 137 138 argc -= optind; 139 argv += optind; 140 141 if (argc) 142 usage(); 143 144 if (!flags) 145 flags |= SFLAG; 146 147 print_uname(flags); 148 exit(0); 149 } 150 151 #define CHECK_ENV(opt,var) \ 152 do { \ 153 if ((var = getenv("UNAME_" opt)) == NULL) { \ 154 get_##var = native_##var; \ 155 } else { \ 156 get_##var = (get_t)NULL; \ 157 } \ 158 } while (0) 159 160 static void 161 setup_get(void) 162 { 163 CHECK_ENV("s", sysname); 164 CHECK_ENV("n", hostname); 165 CHECK_ENV("r", release); 166 CHECK_ENV("v", version); 167 CHECK_ENV("m", platform); 168 CHECK_ENV("p", arch); 169 CHECK_ENV("i", ident); 170 CHECK_ENV("K", kernvers); 171 CHECK_ENV("U", uservers); 172 } 173 174 #define PRINT_FLAG(flags,flag,var) \ 175 if ((flags & flag) == flag) { \ 176 if (space) \ 177 printf(" "); \ 178 else \ 179 space++; \ 180 if (get_##var != NULL) \ 181 (*get_##var)(); \ 182 printf("%s", var); \ 183 } 184 185 static void 186 print_uname(u_int flags) 187 { 188 PRINT_FLAG(flags, SFLAG, sysname); 189 PRINT_FLAG(flags, NFLAG, hostname); 190 PRINT_FLAG(flags, RFLAG, release); 191 PRINT_FLAG(flags, VFLAG, version); 192 PRINT_FLAG(flags, MFLAG, platform); 193 PRINT_FLAG(flags, PFLAG, arch); 194 PRINT_FLAG(flags, IFLAG, ident); 195 PRINT_FLAG(flags, KFLAG, kernvers); 196 PRINT_FLAG(flags, UFLAG, uservers); 197 printf("\n"); 198 } 199 200 #define NATIVE_SYSCTL2_GET(var,mib0,mib1) \ 201 static void \ 202 native_##var(void) \ 203 { \ 204 int mib[] = { (mib0), (mib1) }; \ 205 size_t len; \ 206 static char buf[1024]; \ 207 char **varp = &(var); \ 208 \ 209 len = sizeof buf; \ 210 if (sysctl(mib, sizeof mib / sizeof mib[0], \ 211 &buf, &len, NULL, 0) == -1) \ 212 err(1, "sysctl"); 213 214 #define NATIVE_SYSCTLNAME_GET(var,name) \ 215 static void \ 216 native_##var(void) \ 217 { \ 218 size_t len; \ 219 static char buf[1024]; \ 220 char **varp = &(var); \ 221 \ 222 len = sizeof buf; \ 223 if (sysctlbyname(name, &buf, &len, NULL,\ 224 0) == -1) \ 225 err(1, "sysctlbyname"); 226 227 #define NATIVE_SET \ 228 *varp = buf; \ 229 return; \ 230 } struct __hack 231 232 #define NATIVE_BUFFER (buf) 233 #define NATIVE_LENGTH (len) 234 235 NATIVE_SYSCTL2_GET(sysname, CTL_KERN, KERN_OSTYPE) { 236 } NATIVE_SET; 237 238 NATIVE_SYSCTL2_GET(hostname, CTL_KERN, KERN_HOSTNAME) { 239 } NATIVE_SET; 240 241 NATIVE_SYSCTL2_GET(release, CTL_KERN, KERN_OSRELEASE) { 242 } NATIVE_SET; 243 244 NATIVE_SYSCTL2_GET(version, CTL_KERN, KERN_VERSION) { 245 size_t n; 246 char *p; 247 248 p = NATIVE_BUFFER; 249 n = NATIVE_LENGTH; 250 for (; n--; ++p) 251 if (*p == '\n' || *p == '\t') 252 *p = ' '; 253 } NATIVE_SET; 254 255 NATIVE_SYSCTL2_GET(platform, CTL_HW, HW_MACHINE) { 256 } NATIVE_SET; 257 258 NATIVE_SYSCTL2_GET(arch, CTL_HW, HW_MACHINE_ARCH) { 259 } NATIVE_SET; 260 261 NATIVE_SYSCTLNAME_GET(ident, "kern.ident") { 262 } NATIVE_SET; 263 264 static void 265 native_uservers(void) 266 { 267 static char buf[128]; 268 269 snprintf(buf, sizeof(buf), "%d", __FreeBSD_version); 270 uservers = buf; 271 } 272 273 static void 274 native_kernvers(void) 275 { 276 static char buf[128]; 277 278 snprintf(buf, sizeof(buf), "%d", getosreldate()); 279 kernvers = buf; 280 } 281 282 static void 283 usage(void) 284 { 285 fprintf(stderr, "usage: uname [-aiKmnoprsUv]\n"); 286 exit(1); 287 } 288