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 38 #ifndef lint 39 static const char copyright[] = 40 "@(#) Copyright (c) 1993\n\ 41 The Regents of the University of California. All rights reserved.\n"; 42 #endif 43 44 #ifndef lint 45 static const char sccsid[] = "@(#)uname.c 8.2 (Berkeley) 5/4/95"; 46 #endif 47 48 #include <sys/param.h> 49 #include <sys/sysctl.h> 50 51 #include <err.h> 52 #include <stdio.h> 53 #include <stdlib.h> 54 #include <unistd.h> 55 56 #include <osreldate.h> 57 58 #define MFLAG 0x01 59 #define NFLAG 0x02 60 #define PFLAG 0x04 61 #define RFLAG 0x08 62 #define SFLAG 0x10 63 #define VFLAG 0x20 64 #define IFLAG 0x40 65 #define UFLAG 0x80 66 #define KFLAG 0x100 67 #define BFLAG 0x200 68 69 typedef void (*get_t)(void); 70 static get_t get_buildid, get_ident, get_platform, get_hostname, get_arch, 71 get_release, get_sysname, get_kernvers, get_uservers, get_version; 72 73 static void native_ident(void); 74 static void native_platform(void); 75 static void native_hostname(void); 76 static void native_arch(void); 77 static void native_release(void); 78 static void native_sysname(void); 79 static void native_version(void); 80 static void native_kernvers(void); 81 static void native_uservers(void); 82 static void native_buildid(void); 83 static void print_uname(u_int); 84 static void setup_get(void); 85 static void usage(void) __dead2; 86 87 static char *buildid, *ident, *platform, *hostname, *arch, *release, *sysname, 88 *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, "abiKmnoprsUv")) != -1) 101 switch(ch) { 102 case 'a': 103 flags |= (MFLAG | NFLAG | RFLAG | SFLAG | VFLAG); 104 break; 105 case 'b': 106 flags |= BFLAG; 107 break; 108 case 'i': 109 flags |= IFLAG; 110 break; 111 case 'K': 112 flags |= KFLAG; 113 break; 114 case 'm': 115 flags |= MFLAG; 116 break; 117 case 'n': 118 flags |= NFLAG; 119 break; 120 case 'p': 121 flags |= PFLAG; 122 break; 123 case 'r': 124 flags |= RFLAG; 125 break; 126 case 's': 127 case 'o': 128 flags |= SFLAG; 129 break; 130 case 'U': 131 flags |= UFLAG; 132 break; 133 case 'v': 134 flags |= VFLAG; 135 break; 136 case '?': 137 default: 138 usage(); 139 } 140 141 argc -= optind; 142 argv += optind; 143 144 if (argc) 145 usage(); 146 147 if (!flags) 148 flags |= SFLAG; 149 150 print_uname(flags); 151 exit(0); 152 } 153 154 #define CHECK_ENV(opt,var) \ 155 do { \ 156 if ((var = getenv("UNAME_" opt)) == NULL) { \ 157 get_##var = native_##var; \ 158 } else { \ 159 get_##var = (get_t)NULL; \ 160 } \ 161 } while (0) 162 163 static void 164 setup_get(void) 165 { 166 CHECK_ENV("s", sysname); 167 CHECK_ENV("n", hostname); 168 CHECK_ENV("r", release); 169 CHECK_ENV("v", version); 170 CHECK_ENV("m", platform); 171 CHECK_ENV("p", arch); 172 CHECK_ENV("i", ident); 173 CHECK_ENV("K", kernvers); 174 CHECK_ENV("U", uservers); 175 CHECK_ENV("b", buildid); 176 } 177 178 #define PRINT_FLAG(flags,flag,var) \ 179 if ((flags & flag) == flag) { \ 180 if (space) \ 181 printf(" "); \ 182 else \ 183 space++; \ 184 if (get_##var != NULL) \ 185 (*get_##var)(); \ 186 printf("%s", var); \ 187 } 188 189 static void 190 print_uname(u_int flags) 191 { 192 PRINT_FLAG(flags, SFLAG, sysname); 193 PRINT_FLAG(flags, NFLAG, hostname); 194 PRINT_FLAG(flags, RFLAG, release); 195 PRINT_FLAG(flags, VFLAG, version); 196 PRINT_FLAG(flags, MFLAG, platform); 197 PRINT_FLAG(flags, PFLAG, arch); 198 PRINT_FLAG(flags, IFLAG, ident); 199 PRINT_FLAG(flags, KFLAG, kernvers); 200 PRINT_FLAG(flags, UFLAG, uservers); 201 PRINT_FLAG(flags, BFLAG, buildid); 202 printf("\n"); 203 } 204 205 #define NATIVE_SYSCTL2_GET(var,mib0,mib1) \ 206 static void \ 207 native_##var(void) \ 208 { \ 209 int mib[] = { (mib0), (mib1) }; \ 210 size_t len; \ 211 static char buf[1024]; \ 212 char **varp = &(var); \ 213 \ 214 len = sizeof buf; \ 215 if (sysctl(mib, sizeof mib / sizeof mib[0], \ 216 &buf, &len, NULL, 0) == -1) \ 217 err(1, "sysctl"); 218 219 #define NATIVE_SYSCTLNAME_GET(var,name) \ 220 static void \ 221 native_##var(void) \ 222 { \ 223 size_t len; \ 224 static char buf[1024]; \ 225 char **varp = &(var); \ 226 \ 227 len = sizeof buf; \ 228 if (sysctlbyname(name, &buf, &len, NULL,\ 229 0) == -1) \ 230 err(1, "sysctlbyname"); 231 232 #define NATIVE_SET \ 233 *varp = buf; \ 234 return; \ 235 } struct __hack 236 237 #define NATIVE_BUFFER (buf) 238 #define NATIVE_LENGTH (len) 239 240 NATIVE_SYSCTL2_GET(sysname, CTL_KERN, KERN_OSTYPE) { 241 } NATIVE_SET; 242 243 NATIVE_SYSCTL2_GET(hostname, CTL_KERN, KERN_HOSTNAME) { 244 } NATIVE_SET; 245 246 NATIVE_SYSCTL2_GET(release, CTL_KERN, KERN_OSRELEASE) { 247 } NATIVE_SET; 248 249 NATIVE_SYSCTL2_GET(version, CTL_KERN, KERN_VERSION) { 250 size_t n; 251 char *p; 252 253 p = NATIVE_BUFFER; 254 n = NATIVE_LENGTH; 255 for (; n--; ++p) 256 if (*p == '\n' || *p == '\t') { 257 if (n > 1) 258 *p = ' '; 259 else 260 *p = '\0'; 261 } 262 } NATIVE_SET; 263 264 NATIVE_SYSCTL2_GET(platform, CTL_HW, HW_MACHINE) { 265 } NATIVE_SET; 266 267 NATIVE_SYSCTL2_GET(arch, CTL_HW, HW_MACHINE_ARCH) { 268 } NATIVE_SET; 269 270 NATIVE_SYSCTLNAME_GET(ident, "kern.ident") { 271 } NATIVE_SET; 272 273 NATIVE_SYSCTLNAME_GET(buildid, "kern.build_id") { 274 } NATIVE_SET; 275 276 static void 277 native_uservers(void) 278 { 279 static char buf[128]; 280 281 snprintf(buf, sizeof(buf), "%d", __FreeBSD_version); 282 uservers = buf; 283 } 284 285 static void 286 native_kernvers(void) 287 { 288 static char buf[128]; 289 290 snprintf(buf, sizeof(buf), "%d", getosreldate()); 291 kernvers = buf; 292 } 293 294 static void 295 usage(void) 296 { 297 fprintf(stderr, "usage: uname [-abiKmnoprsUv]\n"); 298 exit(1); 299 } 300