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 64 typedef void (*get_t)(void); 65 get_t get_platform, get_hostname, get_arch, get_release, get_sysname, get_version; 66 67 void native_platform(void); 68 void native_hostname(void); 69 void native_arch(void); 70 void native_release(void); 71 void native_sysname(void); 72 void native_version(void); 73 void print_uname(u_int); 74 void setup_get(void); 75 void usage(void); 76 77 char *platform, *hostname, *arch, *release, *sysname, *version; 78 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, "amnprsv")) != -1) 90 switch(ch) { 91 case 'a': 92 flags |= (MFLAG | NFLAG | RFLAG | SFLAG | VFLAG); 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 } 149 150 #define PRINT_FLAG(flags,flag,var) \ 151 if ((flags & flag) == flag) { \ 152 if (space) \ 153 printf(" "); \ 154 else \ 155 space++; \ 156 if (get_##var != NULL) \ 157 (*get_##var)(); \ 158 printf("%s", var); \ 159 } 160 161 void 162 print_uname(u_int flags) 163 { 164 PRINT_FLAG(flags, SFLAG, sysname); 165 PRINT_FLAG(flags, NFLAG, hostname); 166 PRINT_FLAG(flags, RFLAG, release); 167 PRINT_FLAG(flags, VFLAG, version); 168 PRINT_FLAG(flags, MFLAG, platform); 169 PRINT_FLAG(flags, PFLAG, arch); 170 printf("\n"); 171 } 172 173 #define NATIVE_SYSCTL2_GET(var,mib0,mib1) \ 174 void \ 175 native_##var(void) \ 176 { \ 177 int mib[] = { (mib0), (mib1) }; \ 178 size_t len; \ 179 static char buf[1024]; \ 180 char **varp = &(var); \ 181 \ 182 len = sizeof buf; \ 183 if (sysctl(mib, sizeof mib / sizeof mib[0], \ 184 &buf, &len, NULL, 0) == -1) \ 185 err(1, "sysctl"); 186 187 #define NATIVE_SET \ 188 *varp = buf; \ 189 return; \ 190 } struct __hack 191 192 #define NATIVE_BUFFER (buf) 193 #define NATIVE_LENGTH (len) 194 195 NATIVE_SYSCTL2_GET(sysname, CTL_KERN, KERN_OSTYPE) { 196 } NATIVE_SET; 197 198 NATIVE_SYSCTL2_GET(hostname, CTL_KERN, KERN_HOSTNAME) { 199 } NATIVE_SET; 200 201 NATIVE_SYSCTL2_GET(release, CTL_KERN, KERN_OSRELEASE) { 202 } NATIVE_SET; 203 204 NATIVE_SYSCTL2_GET(version, CTL_KERN, KERN_VERSION) { 205 size_t n; 206 char *p; 207 208 p = NATIVE_BUFFER; 209 n = NATIVE_LENGTH; 210 for (; n--; ++p) 211 if (*p == '\n' || *p == '\t') 212 *p = ' '; 213 } NATIVE_SET; 214 215 NATIVE_SYSCTL2_GET(platform, CTL_HW, HW_MACHINE) { 216 } NATIVE_SET; 217 218 NATIVE_SYSCTL2_GET(arch, CTL_HW, HW_MACHINE_ARCH) { 219 } NATIVE_SET; 220 221 void 222 usage(void) 223 { 224 fprintf(stderr, "usage: uname [-amnprsv]\n"); 225 exit(1); 226 } 227