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/param.h> 38 #include <sys/sysctl.h> 39 40 #include <err.h> 41 #include <stdio.h> 42 #include <stdlib.h> 43 #include <unistd.h> 44 45 #include <osreldate.h> 46 47 #define MFLAG 0x01 48 #define NFLAG 0x02 49 #define PFLAG 0x04 50 #define RFLAG 0x08 51 #define SFLAG 0x10 52 #define VFLAG 0x20 53 #define IFLAG 0x40 54 #define UFLAG 0x80 55 #define KFLAG 0x100 56 #define BFLAG 0x200 57 58 typedef void (*get_t)(void); 59 static get_t get_buildid, get_ident, get_platform, get_hostname, get_arch, 60 get_release, get_sysname, get_kernvers, get_uservers, get_version; 61 62 static void native_ident(void); 63 static void native_platform(void); 64 static void native_hostname(void); 65 static void native_arch(void); 66 static void native_release(void); 67 static void native_sysname(void); 68 static void native_version(void); 69 static void native_kernvers(void); 70 static void native_uservers(void); 71 static void native_buildid(void); 72 static void print_uname(u_int); 73 static void setup_get(void); 74 static void usage(void) __dead2; 75 76 static char *buildid, *ident, *platform, *hostname, *arch, *release, *sysname, 77 *version, *kernvers, *uservers; 78 static int space; 79 80 int 81 main(int argc, char *argv[]) 82 { 83 u_int flags; 84 int ch; 85 86 setup_get(); 87 flags = 0; 88 89 while ((ch = getopt(argc, argv, "abiKmnoprsUv")) != -1) 90 switch(ch) { 91 case 'a': 92 flags |= (MFLAG | NFLAG | RFLAG | SFLAG | VFLAG); 93 break; 94 case 'b': 95 flags |= BFLAG; 96 break; 97 case 'i': 98 flags |= IFLAG; 99 break; 100 case 'K': 101 flags |= KFLAG; 102 break; 103 case 'm': 104 flags |= MFLAG; 105 break; 106 case 'n': 107 flags |= NFLAG; 108 break; 109 case 'p': 110 flags |= PFLAG; 111 break; 112 case 'r': 113 flags |= RFLAG; 114 break; 115 case 's': 116 case 'o': 117 flags |= SFLAG; 118 break; 119 case 'U': 120 flags |= UFLAG; 121 break; 122 case 'v': 123 flags |= VFLAG; 124 break; 125 case '?': 126 default: 127 usage(); 128 } 129 130 argc -= optind; 131 argv += optind; 132 133 if (argc) 134 usage(); 135 136 if (!flags) 137 flags |= SFLAG; 138 139 print_uname(flags); 140 exit(0); 141 } 142 143 #define CHECK_ENV(opt,var) \ 144 do { \ 145 if ((var = getenv("UNAME_" opt)) == NULL) { \ 146 get_##var = native_##var; \ 147 } else { \ 148 get_##var = (get_t)NULL; \ 149 } \ 150 } while (0) 151 152 static void 153 setup_get(void) 154 { 155 CHECK_ENV("s", sysname); 156 CHECK_ENV("n", hostname); 157 CHECK_ENV("r", release); 158 CHECK_ENV("v", version); 159 CHECK_ENV("m", platform); 160 CHECK_ENV("p", arch); 161 CHECK_ENV("i", ident); 162 CHECK_ENV("K", kernvers); 163 CHECK_ENV("U", uservers); 164 CHECK_ENV("b", buildid); 165 } 166 167 #define PRINT_FLAG(flags,flag,var) \ 168 if ((flags & flag) == flag) { \ 169 if (space) \ 170 printf(" "); \ 171 else \ 172 space++; \ 173 if (get_##var != NULL) \ 174 (*get_##var)(); \ 175 printf("%s", var); \ 176 } 177 178 static void 179 print_uname(u_int flags) 180 { 181 PRINT_FLAG(flags, SFLAG, sysname); 182 PRINT_FLAG(flags, NFLAG, hostname); 183 PRINT_FLAG(flags, RFLAG, release); 184 PRINT_FLAG(flags, VFLAG, version); 185 PRINT_FLAG(flags, MFLAG, platform); 186 PRINT_FLAG(flags, PFLAG, arch); 187 PRINT_FLAG(flags, IFLAG, ident); 188 PRINT_FLAG(flags, KFLAG, kernvers); 189 PRINT_FLAG(flags, UFLAG, uservers); 190 PRINT_FLAG(flags, BFLAG, buildid); 191 printf("\n"); 192 } 193 194 #define NATIVE_SYSCTL2_GET(var,mib0,mib1) \ 195 static void \ 196 native_##var(void) \ 197 { \ 198 int mib[] = { (mib0), (mib1) }; \ 199 size_t len; \ 200 static char buf[1024]; \ 201 char **varp = &(var); \ 202 \ 203 len = sizeof buf; \ 204 if (sysctl(mib, sizeof mib / sizeof mib[0], \ 205 &buf, &len, NULL, 0) == -1) \ 206 err(1, "sysctl"); 207 208 #define NATIVE_SYSCTLNAME_GET(var,name) \ 209 static void \ 210 native_##var(void) \ 211 { \ 212 size_t len; \ 213 static char buf[1024]; \ 214 char **varp = &(var); \ 215 \ 216 len = sizeof buf; \ 217 if (sysctlbyname(name, &buf, &len, NULL,\ 218 0) == -1) \ 219 err(1, "sysctlbyname"); 220 221 #define NATIVE_SET \ 222 *varp = buf; \ 223 return; \ 224 } struct __hack 225 226 #define NATIVE_BUFFER (buf) 227 #define NATIVE_LENGTH (len) 228 229 NATIVE_SYSCTL2_GET(sysname, CTL_KERN, KERN_OSTYPE) { 230 } NATIVE_SET; 231 232 NATIVE_SYSCTL2_GET(hostname, CTL_KERN, KERN_HOSTNAME) { 233 } NATIVE_SET; 234 235 NATIVE_SYSCTL2_GET(release, CTL_KERN, KERN_OSRELEASE) { 236 } NATIVE_SET; 237 238 NATIVE_SYSCTL2_GET(version, CTL_KERN, KERN_VERSION) { 239 size_t n; 240 char *p; 241 242 p = NATIVE_BUFFER; 243 n = NATIVE_LENGTH; 244 for (; n--; ++p) 245 if (*p == '\n' || *p == '\t') { 246 if (n > 1) 247 *p = ' '; 248 else 249 *p = '\0'; 250 } 251 } NATIVE_SET; 252 253 NATIVE_SYSCTL2_GET(platform, CTL_HW, HW_MACHINE) { 254 } NATIVE_SET; 255 256 NATIVE_SYSCTL2_GET(arch, CTL_HW, HW_MACHINE_ARCH) { 257 } NATIVE_SET; 258 259 NATIVE_SYSCTLNAME_GET(ident, "kern.ident") { 260 } NATIVE_SET; 261 262 NATIVE_SYSCTLNAME_GET(buildid, "kern.build_id") { 263 } NATIVE_SET; 264 265 static void 266 native_uservers(void) 267 { 268 static char buf[128]; 269 270 snprintf(buf, sizeof(buf), "%d", __FreeBSD_version); 271 uservers = buf; 272 } 273 274 static void 275 native_kernvers(void) 276 { 277 static char buf[128]; 278 279 snprintf(buf, sizeof(buf), "%d", getosreldate()); 280 kernvers = buf; 281 } 282 283 static void 284 usage(void) 285 { 286 fprintf(stderr, "usage: uname [-abiKmnoprsUv]\n"); 287 exit(1); 288 } 289