1 /*- 2 * Copyright (c) 2002 Juli Mallett. 3 * Copyright (c) 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. Neither the name of the University nor the names of its contributors 15 * may be used to endorse or promote products derived from this software 16 * without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * @(#) Copyright (c) 1993 The Regents of the University of California. All rights reserved. 31 * @(#)uname.c 8.2 (Berkeley) 5/4/95 32 * $FreeBSD: src/usr.bin/uname/uname.c,v 1.4.6.2 2002/10/17 07:47:29 jmallett Exp $ 33 */ 34 35 #include <sys/param.h> 36 #include <sys/sysctl.h> 37 #include <sys/varsym.h> 38 39 #include <err.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <unistd.h> 43 #include <string.h> 44 45 #define MFLAG 0x0001 46 #define NFLAG 0x0002 47 #define PFLAG 0x0004 48 #define RFLAG 0x0008 49 #define SFLAG 0x0010 50 #define VFLAG 0x0020 51 #define IFLAG 0x0040 52 #define UFLAG 0x0080 53 #define KFLAG 0x0100 54 #define GFLAG 0x0200 55 #define GFLAG2 0x0400 56 57 typedef void (*get_t)(void); 58 static get_t get_ident, get_machine, get_hostname, get_arch; 59 static get_t get_release, get_sysname, get_version, get_pkgabi; 60 static get_t get_kernvers, get_uservers; 61 62 static void native_ident(void); 63 static void native_machine(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_pkgabi(void); 70 static void native_kernvers(void); 71 static void native_uservers(void); 72 static void print_uname(void); 73 static void setup_get(void); 74 static void usage(void) __dead2; 75 76 static char *ident, *machine, *hostname, *arch; 77 static char *release, *sysname, *version, *pkgabi; 78 static char *kernvers, *uservers; 79 static int space; 80 static u_int flags; 81 82 int 83 main(int argc, char *argv[]) 84 { 85 int ch; 86 87 setup_get(); 88 89 while ((ch = getopt(argc, argv, "aiKmnprsUvP")) != -1) { 90 switch(ch) { 91 case 'a': 92 flags |= (MFLAG | NFLAG | RFLAG | SFLAG | VFLAG); 93 break; 94 case 'i': 95 flags |= IFLAG; 96 break; 97 case 'K': 98 flags |= KFLAG; 99 break; 100 case 'm': 101 flags |= MFLAG; 102 break; 103 case 'n': 104 flags |= NFLAG; 105 break; 106 case 'p': 107 flags |= PFLAG; 108 break; 109 case 'r': 110 flags |= RFLAG; 111 break; 112 case 's': 113 flags |= SFLAG; 114 break; 115 case 'U': 116 flags |= UFLAG; 117 break; 118 case 'v': 119 flags |= VFLAG; 120 break; 121 case 'P': 122 if (flags & GFLAG) /* don't adjust odd numbers */ 123 flags |= GFLAG2; 124 flags |= GFLAG; 125 break; 126 case '?': 127 default: 128 usage(); 129 } 130 } 131 132 argc -= optind; 133 argv += optind; 134 135 if (argc) 136 usage(); 137 138 if (!flags) 139 flags |= SFLAG; 140 141 print_uname(); 142 exit(0); 143 } 144 145 /* 146 * Overrides. 147 * 148 * UNAME_x env variables have the highest priority 149 * UNAME_x varsyms have the next highest priority 150 * values retrieved from sysctls have the lowest priority 151 */ 152 static 153 void 154 CHECK_ENV(const char *envname, get_t *getp, get_t nativep, char **varp) 155 { 156 char buf[MAXVARSYM_DATA]; 157 158 if ((*varp = getenv(envname)) == NULL) { 159 if (varsym_get(VARSYM_ALL_MASK, envname, 160 buf, sizeof(buf)) < 0) { 161 *getp = nativep; 162 return; 163 } 164 *varp = strdup(buf); 165 } 166 *getp = NULL; 167 } 168 169 static void 170 setup_get(void) 171 { 172 CHECK_ENV("UNAME_s", &get_sysname, native_sysname, &sysname); 173 CHECK_ENV("UNAME_n", &get_hostname, native_hostname, &hostname); 174 CHECK_ENV("UNAME_r", &get_release, native_release, &release); 175 CHECK_ENV("UNAME_v", &get_version, native_version, &version); 176 CHECK_ENV("UNAME_m", &get_machine, native_machine, &machine); 177 CHECK_ENV("UNAME_p", &get_arch, native_arch, &arch); 178 CHECK_ENV("UNAME_i", &get_ident, native_ident, &ident); 179 CHECK_ENV("UNAME_K", &get_kernvers, native_kernvers, &kernvers); 180 CHECK_ENV("UNAME_U", &get_uservers, native_uservers, &uservers); 181 CHECK_ENV("UNAME_G", &get_pkgabi, native_pkgabi, &pkgabi); 182 } 183 184 #define PRINT_FLAG(flags,flag,var) \ 185 if ((flags & flag) == flag) { \ 186 if (space) \ 187 printf(" "); \ 188 else \ 189 space++; \ 190 if (get_##var != NULL) \ 191 (*get_##var)(); \ 192 printf("%s", var); \ 193 } 194 195 static void 196 print_uname(void) 197 { 198 PRINT_FLAG(flags, SFLAG, sysname); 199 PRINT_FLAG(flags, NFLAG, hostname); 200 PRINT_FLAG(flags, RFLAG, release); 201 PRINT_FLAG(flags, VFLAG, version); 202 PRINT_FLAG(flags, MFLAG, machine); 203 PRINT_FLAG(flags, PFLAG, arch); 204 PRINT_FLAG(flags, IFLAG, ident); 205 PRINT_FLAG(flags, KFLAG, kernvers); 206 PRINT_FLAG(flags, UFLAG, uservers); 207 PRINT_FLAG(flags, GFLAG, pkgabi); 208 printf("\n"); 209 } 210 211 #define NATIVE_SYSCTL2_GET(var,mib0,mib1) \ 212 static void \ 213 native_##var(void) \ 214 { \ 215 int mib[] = { (mib0), (mib1) }; \ 216 size_t len; \ 217 static char buf[1024]; \ 218 char **varp = &(var); \ 219 \ 220 len = sizeof buf; \ 221 if (sysctl(mib, NELEM(mib), \ 222 &buf, &len, NULL, 0) == -1) \ 223 err(1, "sysctl"); 224 225 #define NATIVE_SYSCTLNAME_GET(var,name) \ 226 static void \ 227 native_##var(void) \ 228 { \ 229 size_t len; \ 230 static char buf[1024]; \ 231 char **varp = &(var); \ 232 \ 233 len = sizeof buf; \ 234 if (sysctlbyname(name, &buf, &len, NULL,\ 235 0) == -1) \ 236 err(1, "sysctlbyname"); 237 238 #define NATIVE_SET \ 239 *varp = buf; \ 240 return; \ 241 } struct __hack 242 243 #define NATIVE_BUFFER (buf) 244 #define NATIVE_LENGTH (len) 245 246 NATIVE_SYSCTL2_GET(sysname, CTL_KERN, KERN_OSTYPE) { 247 } NATIVE_SET; 248 249 NATIVE_SYSCTL2_GET(hostname, CTL_KERN, KERN_HOSTNAME) { 250 } NATIVE_SET; 251 252 NATIVE_SYSCTL2_GET(release, CTL_KERN, KERN_OSRELEASE) { 253 } NATIVE_SET; 254 255 NATIVE_SYSCTL2_GET(version, CTL_KERN, KERN_VERSION) { 256 size_t n; 257 char *p; 258 259 p = NATIVE_BUFFER; 260 n = NATIVE_LENGTH; 261 for (; n--; ++p) 262 if (*p == '\n' || *p == '\t') 263 *p = ' '; 264 } NATIVE_SET; 265 266 NATIVE_SYSCTL2_GET(machine, CTL_HW, HW_MACHINE) { 267 } NATIVE_SET; 268 269 NATIVE_SYSCTL2_GET(arch, CTL_HW, HW_MACHINE_ARCH) { 270 } NATIVE_SET; 271 272 NATIVE_SYSCTLNAME_GET(ident, "kern.ident") { 273 } NATIVE_SET; 274 275 static void \ 276 native_pkgabi(void) \ 277 { 278 char osrel[64]; 279 char mach[64]; 280 size_t len; 281 double d; 282 283 len = sizeof(osrel); 284 if (sysctlbyname("kern.osrelease", osrel, &len, NULL, 0) == -1) 285 err(1, "sysctlbyname"); 286 len = sizeof(mach); 287 if (sysctlbyname("hw.machine", mach, &len, NULL, 0) == -1) 288 err(1, "sysctlbyname"); 289 290 /* 291 * Current convention is to adjust odd release numbers to even. 292 */ 293 d = strtod(osrel, NULL); 294 if ((flags & GFLAG2) == 0) { 295 if ((int)(d * 10) & 1) 296 d = d + 0.1; /* force to nearest even release */ 297 } 298 299 /* 300 * pkgng expects the ABI in a different form 301 */ 302 if (strcmp(mach, "x86_64") == 0) 303 snprintf(mach, sizeof(mach), "x86:64"); 304 else if (strcmp(mach, "i386") == 0) 305 snprintf(mach, sizeof(mach), "x86:32"); 306 307 asprintf(&pkgabi, "dragonfly:%3.1f:%s", d, mach); 308 } 309 310 static void 311 native_kernvers(void) 312 { 313 static char buf[128]; 314 315 snprintf(buf, sizeof(buf), "%d", getosreldate()); 316 kernvers = buf; 317 } 318 319 static void 320 native_uservers(void) 321 { 322 static char buf[128]; 323 324 snprintf(buf, sizeof(buf), "%d", __DragonFly_version); 325 uservers = buf; 326 } 327 328 static void 329 usage(void) 330 { 331 fprintf(stderr, "usage: uname [-aiKmnprsUvP]\n"); 332 exit(1); 333 } 334