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 #define BFLAG 0x200 71 72 typedef void (*get_t)(void); 73 static get_t get_buildid, get_ident, get_platform, get_hostname, get_arch, 74 get_release, get_sysname, get_kernvers, get_uservers, get_version; 75 76 static void native_ident(void); 77 static void native_platform(void); 78 static void native_hostname(void); 79 static void native_arch(void); 80 static void native_release(void); 81 static void native_sysname(void); 82 static void native_version(void); 83 static void native_kernvers(void); 84 static void native_uservers(void); 85 static void native_buildid(void); 86 static void print_uname(u_int); 87 static void setup_get(void); 88 static void usage(void); 89 90 static char *buildid, *ident, *platform, *hostname, *arch, *release, *sysname, 91 *version, *kernvers, *uservers; 92 static int space; 93 94 int 95 main(int argc, char *argv[]) 96 { 97 u_int flags; 98 int ch; 99 100 setup_get(); 101 flags = 0; 102 103 while ((ch = getopt(argc, argv, "abiKmnoprsUv")) != -1) 104 switch(ch) { 105 case 'a': 106 flags |= (MFLAG | NFLAG | RFLAG | SFLAG | VFLAG); 107 break; 108 case 'b': 109 flags |= BFLAG; 110 break; 111 case 'i': 112 flags |= IFLAG; 113 break; 114 case 'K': 115 flags |= KFLAG; 116 break; 117 case 'm': 118 flags |= MFLAG; 119 break; 120 case 'n': 121 flags |= NFLAG; 122 break; 123 case 'p': 124 flags |= PFLAG; 125 break; 126 case 'r': 127 flags |= RFLAG; 128 break; 129 case 's': 130 case 'o': 131 flags |= SFLAG; 132 break; 133 case 'U': 134 flags |= UFLAG; 135 break; 136 case 'v': 137 flags |= VFLAG; 138 break; 139 case '?': 140 default: 141 usage(); 142 } 143 144 argc -= optind; 145 argv += optind; 146 147 if (argc) 148 usage(); 149 150 if (!flags) 151 flags |= SFLAG; 152 153 print_uname(flags); 154 exit(0); 155 } 156 157 #define CHECK_ENV(opt,var) \ 158 do { \ 159 if ((var = getenv("UNAME_" opt)) == NULL) { \ 160 get_##var = native_##var; \ 161 } else { \ 162 get_##var = (get_t)NULL; \ 163 } \ 164 } while (0) 165 166 static void 167 setup_get(void) 168 { 169 CHECK_ENV("s", sysname); 170 CHECK_ENV("n", hostname); 171 CHECK_ENV("r", release); 172 CHECK_ENV("v", version); 173 CHECK_ENV("m", platform); 174 CHECK_ENV("p", arch); 175 CHECK_ENV("i", ident); 176 CHECK_ENV("K", kernvers); 177 CHECK_ENV("U", uservers); 178 CHECK_ENV("b", buildid); 179 } 180 181 #define PRINT_FLAG(flags,flag,var) \ 182 if ((flags & flag) == flag) { \ 183 if (space) \ 184 printf(" "); \ 185 else \ 186 space++; \ 187 if (get_##var != NULL) \ 188 (*get_##var)(); \ 189 printf("%s", var); \ 190 } 191 192 static void 193 print_uname(u_int flags) 194 { 195 PRINT_FLAG(flags, SFLAG, sysname); 196 PRINT_FLAG(flags, NFLAG, hostname); 197 PRINT_FLAG(flags, RFLAG, release); 198 PRINT_FLAG(flags, VFLAG, version); 199 PRINT_FLAG(flags, MFLAG, platform); 200 PRINT_FLAG(flags, PFLAG, arch); 201 PRINT_FLAG(flags, IFLAG, ident); 202 PRINT_FLAG(flags, KFLAG, kernvers); 203 PRINT_FLAG(flags, UFLAG, uservers); 204 PRINT_FLAG(flags, BFLAG, buildid); 205 printf("\n"); 206 } 207 208 #define NATIVE_SYSCTL2_GET(var,mib0,mib1) \ 209 static void \ 210 native_##var(void) \ 211 { \ 212 int mib[] = { (mib0), (mib1) }; \ 213 size_t len; \ 214 static char buf[1024]; \ 215 char **varp = &(var); \ 216 \ 217 len = sizeof buf; \ 218 if (sysctl(mib, sizeof mib / sizeof mib[0], \ 219 &buf, &len, NULL, 0) == -1) \ 220 err(1, "sysctl"); 221 222 #define NATIVE_SYSCTLNAME_GET(var,name) \ 223 static void \ 224 native_##var(void) \ 225 { \ 226 size_t len; \ 227 static char buf[1024]; \ 228 char **varp = &(var); \ 229 \ 230 len = sizeof buf; \ 231 if (sysctlbyname(name, &buf, &len, NULL,\ 232 0) == -1) \ 233 err(1, "sysctlbyname"); 234 235 #define NATIVE_SET \ 236 *varp = buf; \ 237 return; \ 238 } struct __hack 239 240 #define NATIVE_BUFFER (buf) 241 #define NATIVE_LENGTH (len) 242 243 NATIVE_SYSCTL2_GET(sysname, CTL_KERN, KERN_OSTYPE) { 244 } NATIVE_SET; 245 246 NATIVE_SYSCTL2_GET(hostname, CTL_KERN, KERN_HOSTNAME) { 247 } NATIVE_SET; 248 249 NATIVE_SYSCTL2_GET(release, CTL_KERN, KERN_OSRELEASE) { 250 } NATIVE_SET; 251 252 NATIVE_SYSCTL2_GET(version, CTL_KERN, KERN_VERSION) { 253 size_t n; 254 char *p; 255 256 p = NATIVE_BUFFER; 257 n = NATIVE_LENGTH; 258 for (; n--; ++p) 259 if (*p == '\n' || *p == '\t') { 260 if (n > 1) 261 *p = ' '; 262 else 263 *p = '\0'; 264 } 265 } NATIVE_SET; 266 267 NATIVE_SYSCTL2_GET(platform, CTL_HW, HW_MACHINE) { 268 } NATIVE_SET; 269 270 NATIVE_SYSCTL2_GET(arch, CTL_HW, HW_MACHINE_ARCH) { 271 } NATIVE_SET; 272 273 NATIVE_SYSCTLNAME_GET(ident, "kern.ident") { 274 } NATIVE_SET; 275 276 NATIVE_SYSCTLNAME_GET(buildid, "kern.build_id") { 277 } NATIVE_SET; 278 279 static void 280 native_uservers(void) 281 { 282 static char buf[128]; 283 284 snprintf(buf, sizeof(buf), "%d", __FreeBSD_version); 285 uservers = buf; 286 } 287 288 static void 289 native_kernvers(void) 290 { 291 static char buf[128]; 292 293 snprintf(buf, sizeof(buf), "%d", getosreldate()); 294 kernvers = buf; 295 } 296 297 static void 298 usage(void) 299 { 300 fprintf(stderr, "usage: uname [-abiKmnoprsUv]\n"); 301 exit(1); 302 } 303