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 */ 38 39 #include <sys/param.h> 40 #include <sys/sysctl.h> 41 #include <sys/varsym.h> 42 43 #include <err.h> 44 #include <stdio.h> 45 #include <stdlib.h> 46 #include <unistd.h> 47 #include <string.h> 48 49 #define MFLAG 0x01 50 #define NFLAG 0x02 51 #define PFLAG 0x04 52 #define RFLAG 0x08 53 #define SFLAG 0x10 54 #define VFLAG 0x20 55 #define IFLAG 0x40 56 57 typedef void (*get_t)(void); 58 get_t get_ident, get_machine, get_hostname, get_arch; 59 get_t get_release, get_sysname, get_version; 60 61 void native_ident(void); 62 void native_machine(void); 63 void native_hostname(void); 64 void native_arch(void); 65 void native_release(void); 66 void native_sysname(void); 67 void native_version(void); 68 void print_uname(u_int); 69 void setup_get(void); 70 void usage(void); 71 72 char *ident, *machine, *hostname, *arch; 73 char *release, *sysname, *version; 74 int space; 75 76 int 77 main(int argc, char *argv[]) 78 { 79 u_int flags; 80 int ch; 81 82 setup_get(); 83 flags = 0; 84 85 while ((ch = getopt(argc, argv, "aimnprsv")) != -1) 86 switch(ch) { 87 case 'a': 88 flags |= (MFLAG | NFLAG | RFLAG | SFLAG | VFLAG); 89 break; 90 case 'i': 91 flags |= IFLAG; 92 break; 93 case 'm': 94 flags |= MFLAG; 95 break; 96 case 'n': 97 flags |= NFLAG; 98 break; 99 case 'p': 100 flags |= PFLAG; 101 break; 102 case 'r': 103 flags |= RFLAG; 104 break; 105 case 's': 106 flags |= SFLAG; 107 break; 108 case 'v': 109 flags |= VFLAG; 110 break; 111 case '?': 112 default: 113 usage(); 114 } 115 116 argc -= optind; 117 argv += optind; 118 119 if (argc) 120 usage(); 121 122 if (!flags) 123 flags |= SFLAG; 124 125 print_uname(flags); 126 exit(0); 127 } 128 129 /* 130 * Overrides. 131 * 132 * UNAME_x env variables have the highest priority 133 * UNAME_x varsyms have the next highest priority 134 * values retrieved from sysctls have the lowest priority 135 */ 136 static 137 void 138 CHECK_ENV(const char *envname, get_t *getp, get_t nativep, char **varp) 139 { 140 char buf[1024]; 141 142 if ((*varp = getenv(envname)) == NULL) { 143 if (varsym_get(VARSYM_ALL_MASK, envname, 144 buf, sizeof(buf)) < 0) { 145 *getp = nativep; 146 return; 147 } 148 *varp = strdup(buf); 149 } 150 *getp = NULL; 151 } 152 153 void 154 setup_get(void) 155 { 156 CHECK_ENV("UNAME_s", &get_sysname, native_sysname, &sysname); 157 CHECK_ENV("UNAME_n", &get_hostname, native_hostname, &hostname); 158 CHECK_ENV("UNAME_r", &get_release, native_release, &release); 159 CHECK_ENV("UNAME_v", &get_version, native_version, &version); 160 CHECK_ENV("UNAME_m", &get_machine, native_machine, &machine); 161 CHECK_ENV("UNAME_p", &get_arch, native_arch, &arch); 162 CHECK_ENV("UNAME_i", &get_ident, native_ident, &ident); 163 } 164 165 #define PRINT_FLAG(flags,flag,var) \ 166 if ((flags & flag) == flag) { \ 167 if (space) \ 168 printf(" "); \ 169 else \ 170 space++; \ 171 if (get_##var != NULL) \ 172 (*get_##var)(); \ 173 printf("%s", var); \ 174 } 175 176 void 177 print_uname(u_int flags) 178 { 179 PRINT_FLAG(flags, SFLAG, sysname); 180 PRINT_FLAG(flags, NFLAG, hostname); 181 PRINT_FLAG(flags, RFLAG, release); 182 PRINT_FLAG(flags, VFLAG, version); 183 PRINT_FLAG(flags, MFLAG, machine); 184 PRINT_FLAG(flags, PFLAG, arch); 185 PRINT_FLAG(flags, IFLAG, ident); 186 printf("\n"); 187 } 188 189 #define NATIVE_SYSCTL2_GET(var,mib0,mib1) \ 190 void \ 191 native_##var(void) \ 192 { \ 193 int mib[] = { (mib0), (mib1) }; \ 194 size_t len; \ 195 static char buf[1024]; \ 196 char **varp = &(var); \ 197 \ 198 len = sizeof buf; \ 199 if (sysctl(mib, sizeof mib / sizeof mib[0], \ 200 &buf, &len, NULL, 0) == -1) \ 201 err(1, "sysctl"); 202 203 #define NATIVE_SYSCTLNAME_GET(var,name) \ 204 void \ 205 native_##var(void) \ 206 { \ 207 size_t len; \ 208 static char buf[1024]; \ 209 char **varp = &(var); \ 210 \ 211 len = sizeof buf; \ 212 if (sysctlbyname(name, &buf, &len, NULL,\ 213 0) == -1) \ 214 err(1, "sysctlbyname"); 215 216 #define NATIVE_SET \ 217 *varp = buf; \ 218 return; \ 219 } struct __hack 220 221 #define NATIVE_BUFFER (buf) 222 #define NATIVE_LENGTH (len) 223 224 NATIVE_SYSCTL2_GET(sysname, CTL_KERN, KERN_OSTYPE) { 225 } NATIVE_SET; 226 227 NATIVE_SYSCTL2_GET(hostname, CTL_KERN, KERN_HOSTNAME) { 228 } NATIVE_SET; 229 230 NATIVE_SYSCTL2_GET(release, CTL_KERN, KERN_OSRELEASE) { 231 } NATIVE_SET; 232 233 NATIVE_SYSCTL2_GET(version, CTL_KERN, KERN_VERSION) { 234 size_t n; 235 char *p; 236 237 p = NATIVE_BUFFER; 238 n = NATIVE_LENGTH; 239 for (; n--; ++p) 240 if (*p == '\n' || *p == '\t') 241 *p = ' '; 242 } NATIVE_SET; 243 244 NATIVE_SYSCTL2_GET(machine, CTL_HW, HW_MACHINE) { 245 } NATIVE_SET; 246 247 NATIVE_SYSCTL2_GET(arch, CTL_HW, HW_MACHINE_ARCH) { 248 } NATIVE_SET; 249 250 NATIVE_SYSCTLNAME_GET(ident, "kern.ident") { 251 } NATIVE_SET; 252 253 void 254 usage(void) 255 { 256 fprintf(stderr, "usage: uname [-aimnprsv]\n"); 257 exit(1); 258 } 259