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 get_t get_ident, get_platform, get_hostname, get_arch, get_release, get_sysname, get_version; 67 68 void native_ident(void); 69 void native_platform(void); 70 void native_hostname(void); 71 void native_arch(void); 72 void native_release(void); 73 void native_sysname(void); 74 void native_version(void); 75 void print_uname(u_int); 76 void setup_get(void); 77 void usage(void); 78 79 char *ident, *platform, *hostname, *arch, *release, *sysname, *version; 80 int space; 81 82 int 83 main(int argc, char *argv[]) 84 { 85 u_int flags; 86 int ch; 87 88 setup_get(); 89 flags = 0; 90 91 while ((ch = getopt(argc, argv, "aimnprsv")) != -1) 92 switch(ch) { 93 case 'a': 94 flags |= (MFLAG | NFLAG | RFLAG | SFLAG | VFLAG); 95 break; 96 case 'i': 97 flags |= IFLAG; 98 break; 99 case 'm': 100 flags |= MFLAG; 101 break; 102 case 'n': 103 flags |= NFLAG; 104 break; 105 case 'p': 106 flags |= PFLAG; 107 break; 108 case 'r': 109 flags |= RFLAG; 110 break; 111 case 's': 112 flags |= SFLAG; 113 break; 114 case 'v': 115 flags |= VFLAG; 116 break; 117 case '?': 118 default: 119 usage(); 120 } 121 122 argc -= optind; 123 argv += optind; 124 125 if (argc) 126 usage(); 127 128 if (!flags) 129 flags |= SFLAG; 130 131 print_uname(flags); 132 exit(0); 133 } 134 135 #define CHECK_ENV(opt,var) \ 136 do { \ 137 if ((var = getenv("UNAME_" opt)) == NULL) { \ 138 get_##var = native_##var; \ 139 } else { \ 140 get_##var = (get_t)NULL; \ 141 } \ 142 } while (0) 143 144 void 145 setup_get(void) 146 { 147 CHECK_ENV("s", sysname); 148 CHECK_ENV("n", hostname); 149 CHECK_ENV("r", release); 150 CHECK_ENV("v", version); 151 CHECK_ENV("m", platform); 152 CHECK_ENV("p", arch); 153 CHECK_ENV("i", ident); 154 } 155 156 #define PRINT_FLAG(flags,flag,var) \ 157 if ((flags & flag) == flag) { \ 158 if (space) \ 159 printf(" "); \ 160 else \ 161 space++; \ 162 if (get_##var != NULL) \ 163 (*get_##var)(); \ 164 printf("%s", var); \ 165 } 166 167 void 168 print_uname(u_int flags) 169 { 170 PRINT_FLAG(flags, SFLAG, sysname); 171 PRINT_FLAG(flags, NFLAG, hostname); 172 PRINT_FLAG(flags, RFLAG, release); 173 PRINT_FLAG(flags, VFLAG, version); 174 PRINT_FLAG(flags, MFLAG, platform); 175 PRINT_FLAG(flags, PFLAG, arch); 176 PRINT_FLAG(flags, IFLAG, ident); 177 printf("\n"); 178 } 179 180 #define NATIVE_SYSCTL2_GET(var,mib0,mib1) \ 181 void \ 182 native_##var(void) \ 183 { \ 184 int mib[] = { (mib0), (mib1) }; \ 185 size_t len; \ 186 static char buf[1024]; \ 187 char **varp = &(var); \ 188 \ 189 len = sizeof buf; \ 190 if (sysctl(mib, sizeof mib / sizeof mib[0], \ 191 &buf, &len, NULL, 0) == -1) \ 192 err(1, "sysctl"); 193 194 #define NATIVE_SYSCTLNAME_GET(var,name) \ 195 void \ 196 native_##var(void) \ 197 { \ 198 size_t len; \ 199 static char buf[1024]; \ 200 char **varp = &(var); \ 201 \ 202 len = sizeof buf; \ 203 if (sysctlbyname(name, &buf, &len, NULL,\ 204 0) == -1) \ 205 err(1, "sysctlbyname"); 206 207 #define NATIVE_SET \ 208 *varp = buf; \ 209 return; \ 210 } struct __hack 211 212 #define NATIVE_BUFFER (buf) 213 #define NATIVE_LENGTH (len) 214 215 NATIVE_SYSCTL2_GET(sysname, CTL_KERN, KERN_OSTYPE) { 216 } NATIVE_SET; 217 218 NATIVE_SYSCTL2_GET(hostname, CTL_KERN, KERN_HOSTNAME) { 219 } NATIVE_SET; 220 221 NATIVE_SYSCTL2_GET(release, CTL_KERN, KERN_OSRELEASE) { 222 } NATIVE_SET; 223 224 NATIVE_SYSCTL2_GET(version, CTL_KERN, KERN_VERSION) { 225 size_t n; 226 char *p; 227 228 p = NATIVE_BUFFER; 229 n = NATIVE_LENGTH; 230 for (; n--; ++p) 231 if (*p == '\n' || *p == '\t') 232 *p = ' '; 233 } NATIVE_SET; 234 235 NATIVE_SYSCTL2_GET(platform, CTL_HW, HW_MACHINE) { 236 } NATIVE_SET; 237 238 NATIVE_SYSCTL2_GET(arch, CTL_HW, HW_MACHINE_ARCH) { 239 } NATIVE_SET; 240 241 NATIVE_SYSCTLNAME_GET(ident, "kern.ident") { 242 } NATIVE_SET; 243 244 void 245 usage(void) 246 { 247 fprintf(stderr, "usage: uname [-aimnprsv]\n"); 248 exit(1); 249 } 250