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