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 * @(#) Copyright (c) 1993 The Regents of the University of California. All rights reserved. 35 * @(#)uname.c 8.2 (Berkeley) 5/4/95 36 * $FreeBSD: src/usr.bin/uname/uname.c,v 1.4.6.2 2002/10/17 07:47:29 jmallett Exp $ 37 * $DragonFly: src/usr.bin/uname/uname.c,v 1.5 2007/01/04 14:19:03 y0netan1 Exp $ 38 */ 39 40 #include <sys/param.h> 41 #include <sys/sysctl.h> 42 43 #include <err.h> 44 #include <stdio.h> 45 #include <stdlib.h> 46 #include <unistd.h> 47 48 #ifndef HW_MACHINE_UNAME 49 #define HW_MACHINE_UNAME HW_MACHINE 50 #endif 51 52 #define MFLAG 0x01 53 #define NFLAG 0x02 54 #define PFLAG 0x04 55 #define RFLAG 0x08 56 #define SFLAG 0x10 57 #define VFLAG 0x20 58 #define IFLAG 0x40 59 60 typedef void (*get_t)(void); 61 get_t get_ident, get_platform, get_hostname, get_arch, get_release, get_sysname, get_version; 62 63 void native_ident(void); 64 void native_platform(void); 65 void native_hostname(void); 66 void native_arch(void); 67 void native_release(void); 68 void native_sysname(void); 69 void native_version(void); 70 void print_uname(u_int); 71 void setup_get(void); 72 void usage(void); 73 74 char *ident, *platform, *hostname, *arch, *release, *sysname, *version; 75 int space; 76 77 int 78 main(int argc, char *argv[]) 79 { 80 u_int flags; 81 int ch; 82 83 setup_get(); 84 flags = 0; 85 86 while ((ch = getopt(argc, argv, "aimnprsv")) != -1) 87 switch(ch) { 88 case 'a': 89 flags |= (MFLAG | NFLAG | RFLAG | SFLAG | VFLAG); 90 break; 91 case 'i': 92 flags |= IFLAG; 93 break; 94 case 'm': 95 flags |= MFLAG; 96 break; 97 case 'n': 98 flags |= NFLAG; 99 break; 100 case 'p': 101 flags |= PFLAG; 102 break; 103 case 'r': 104 flags |= RFLAG; 105 break; 106 case 's': 107 flags |= SFLAG; 108 break; 109 case 'v': 110 flags |= VFLAG; 111 break; 112 case '?': 113 default: 114 usage(); 115 } 116 117 argc -= optind; 118 argv += optind; 119 120 if (argc) 121 usage(); 122 123 if (!flags) 124 flags |= SFLAG; 125 126 print_uname(flags); 127 exit(0); 128 } 129 130 #define CHECK_ENV(opt,var) \ 131 do { \ 132 if ((var = getenv("UNAME_" opt)) == NULL) { \ 133 get_##var = native_##var; \ 134 } else { \ 135 get_##var = (get_t)NULL; \ 136 } \ 137 } while (0) 138 139 void 140 setup_get(void) 141 { 142 CHECK_ENV("s", sysname); 143 CHECK_ENV("n", hostname); 144 CHECK_ENV("r", release); 145 CHECK_ENV("v", version); 146 CHECK_ENV("m", platform); 147 CHECK_ENV("p", arch); 148 CHECK_ENV("i", ident); 149 } 150 151 #define PRINT_FLAG(flags,flag,var) \ 152 if ((flags & flag) == flag) { \ 153 if (space) \ 154 printf(" "); \ 155 else \ 156 space++; \ 157 if (get_##var != NULL) \ 158 (*get_##var)(); \ 159 printf("%s", var); \ 160 } 161 162 void 163 print_uname(u_int flags) 164 { 165 PRINT_FLAG(flags, SFLAG, sysname); 166 PRINT_FLAG(flags, NFLAG, hostname); 167 PRINT_FLAG(flags, RFLAG, release); 168 PRINT_FLAG(flags, VFLAG, version); 169 PRINT_FLAG(flags, MFLAG, platform); 170 PRINT_FLAG(flags, PFLAG, arch); 171 PRINT_FLAG(flags, IFLAG, ident); 172 printf("\n"); 173 } 174 175 #define NATIVE_SYSCTL2_GET(var,mib0,mib1) \ 176 void \ 177 native_##var(void) \ 178 { \ 179 int mib[] = { (mib0), (mib1) }; \ 180 size_t len; \ 181 static char buf[1024]; \ 182 char **varp = &(var); \ 183 \ 184 len = sizeof buf; \ 185 if (sysctl(mib, sizeof mib / sizeof mib[0], \ 186 &buf, &len, NULL, 0) == -1) \ 187 err(1, "sysctl"); 188 189 #define NATIVE_SYSCTLNAME_GET(var,name) \ 190 void \ 191 native_##var(void) \ 192 { \ 193 size_t len; \ 194 static char buf[1024]; \ 195 char **varp = &(var); \ 196 \ 197 len = sizeof buf; \ 198 if (sysctlbyname(name, &buf, &len, NULL,\ 199 0) == -1) \ 200 err(1, "sysctlbyname"); 201 202 #define NATIVE_SET \ 203 *varp = buf; \ 204 return; \ 205 } struct __hack 206 207 #define NATIVE_BUFFER (buf) 208 #define NATIVE_LENGTH (len) 209 210 NATIVE_SYSCTL2_GET(sysname, CTL_KERN, KERN_OSTYPE) { 211 } NATIVE_SET; 212 213 NATIVE_SYSCTL2_GET(hostname, CTL_KERN, KERN_HOSTNAME) { 214 } NATIVE_SET; 215 216 NATIVE_SYSCTL2_GET(release, CTL_KERN, KERN_OSRELEASE) { 217 } NATIVE_SET; 218 219 NATIVE_SYSCTL2_GET(version, CTL_KERN, KERN_VERSION) { 220 size_t n; 221 char *p; 222 223 p = NATIVE_BUFFER; 224 n = NATIVE_LENGTH; 225 for (; n--; ++p) 226 if (*p == '\n' || *p == '\t') 227 *p = ' '; 228 } NATIVE_SET; 229 230 NATIVE_SYSCTL2_GET(platform, CTL_HW, HW_MACHINE_UNAME) { 231 } NATIVE_SET; 232 233 NATIVE_SYSCTL2_GET(arch, CTL_HW, HW_MACHINE_ARCH) { 234 } NATIVE_SET; 235 236 NATIVE_SYSCTLNAME_GET(ident, "kern.ident") { 237 } NATIVE_SET; 238 239 void 240 usage(void) 241 { 242 fprintf(stderr, "usage: uname [-aimnprsv]\n"); 243 exit(1); 244 } 245