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 * 4. Neither the name of the University nor the names of its contributors 15 * may be used to endorse or promote products derived from this software 16 * without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * @(#) Copyright (c) 1993 The Regents of the University of California. All rights reserved. 31 * @(#)uname.c 8.2 (Berkeley) 5/4/95 32 * $FreeBSD: src/usr.bin/uname/uname.c,v 1.4.6.2 2002/10/17 07:47:29 jmallett Exp $ 33 */ 34 35 #include <sys/param.h> 36 #include <sys/sysctl.h> 37 #include <sys/varsym.h> 38 39 #include <err.h> 40 #include <stdio.h> 41 #include <stdlib.h> 42 #include <unistd.h> 43 #include <string.h> 44 45 #define MFLAG 0x01 46 #define NFLAG 0x02 47 #define PFLAG 0x04 48 #define RFLAG 0x08 49 #define SFLAG 0x10 50 #define VFLAG 0x20 51 #define IFLAG 0x40 52 53 typedef void (*get_t)(void); 54 get_t get_ident, get_machine, get_hostname, get_arch; 55 get_t get_release, get_sysname, get_version; 56 57 void native_ident(void); 58 void native_machine(void); 59 void native_hostname(void); 60 void native_arch(void); 61 void native_release(void); 62 void native_sysname(void); 63 void native_version(void); 64 void print_uname(u_int); 65 void setup_get(void); 66 void usage(void); 67 68 char *ident, *machine, *hostname, *arch; 69 char *release, *sysname, *version; 70 int space; 71 72 int 73 main(int argc, char *argv[]) 74 { 75 u_int flags; 76 int ch; 77 78 setup_get(); 79 flags = 0; 80 81 while ((ch = getopt(argc, argv, "aimnprsv")) != -1) 82 switch(ch) { 83 case 'a': 84 flags |= (MFLAG | NFLAG | RFLAG | SFLAG | VFLAG); 85 break; 86 case 'i': 87 flags |= IFLAG; 88 break; 89 case 'm': 90 flags |= MFLAG; 91 break; 92 case 'n': 93 flags |= NFLAG; 94 break; 95 case 'p': 96 flags |= PFLAG; 97 break; 98 case 'r': 99 flags |= RFLAG; 100 break; 101 case 's': 102 flags |= SFLAG; 103 break; 104 case 'v': 105 flags |= VFLAG; 106 break; 107 case '?': 108 default: 109 usage(); 110 } 111 112 argc -= optind; 113 argv += optind; 114 115 if (argc) 116 usage(); 117 118 if (!flags) 119 flags |= SFLAG; 120 121 print_uname(flags); 122 exit(0); 123 } 124 125 /* 126 * Overrides. 127 * 128 * UNAME_x env variables have the highest priority 129 * UNAME_x varsyms have the next highest priority 130 * values retrieved from sysctls have the lowest priority 131 */ 132 static 133 void 134 CHECK_ENV(const char *envname, get_t *getp, get_t nativep, char **varp) 135 { 136 char buf[1024]; 137 138 if ((*varp = getenv(envname)) == NULL) { 139 if (varsym_get(VARSYM_ALL_MASK, envname, 140 buf, sizeof(buf)) < 0) { 141 *getp = nativep; 142 return; 143 } 144 *varp = strdup(buf); 145 } 146 *getp = NULL; 147 } 148 149 void 150 setup_get(void) 151 { 152 CHECK_ENV("UNAME_s", &get_sysname, native_sysname, &sysname); 153 CHECK_ENV("UNAME_n", &get_hostname, native_hostname, &hostname); 154 CHECK_ENV("UNAME_r", &get_release, native_release, &release); 155 CHECK_ENV("UNAME_v", &get_version, native_version, &version); 156 CHECK_ENV("UNAME_m", &get_machine, native_machine, &machine); 157 CHECK_ENV("UNAME_p", &get_arch, native_arch, &arch); 158 CHECK_ENV("UNAME_i", &get_ident, native_ident, &ident); 159 } 160 161 #define PRINT_FLAG(flags,flag,var) \ 162 if ((flags & flag) == flag) { \ 163 if (space) \ 164 printf(" "); \ 165 else \ 166 space++; \ 167 if (get_##var != NULL) \ 168 (*get_##var)(); \ 169 printf("%s", var); \ 170 } 171 172 void 173 print_uname(u_int flags) 174 { 175 PRINT_FLAG(flags, SFLAG, sysname); 176 PRINT_FLAG(flags, NFLAG, hostname); 177 PRINT_FLAG(flags, RFLAG, release); 178 PRINT_FLAG(flags, VFLAG, version); 179 PRINT_FLAG(flags, MFLAG, machine); 180 PRINT_FLAG(flags, PFLAG, arch); 181 PRINT_FLAG(flags, IFLAG, ident); 182 printf("\n"); 183 } 184 185 #define NATIVE_SYSCTL2_GET(var,mib0,mib1) \ 186 void \ 187 native_##var(void) \ 188 { \ 189 int mib[] = { (mib0), (mib1) }; \ 190 size_t len; \ 191 static char buf[1024]; \ 192 char **varp = &(var); \ 193 \ 194 len = sizeof buf; \ 195 if (sysctl(mib, sizeof mib / sizeof mib[0], \ 196 &buf, &len, NULL, 0) == -1) \ 197 err(1, "sysctl"); 198 199 #define NATIVE_SYSCTLNAME_GET(var,name) \ 200 void \ 201 native_##var(void) \ 202 { \ 203 size_t len; \ 204 static char buf[1024]; \ 205 char **varp = &(var); \ 206 \ 207 len = sizeof buf; \ 208 if (sysctlbyname(name, &buf, &len, NULL,\ 209 0) == -1) \ 210 err(1, "sysctlbyname"); 211 212 #define NATIVE_SET \ 213 *varp = buf; \ 214 return; \ 215 } struct __hack 216 217 #define NATIVE_BUFFER (buf) 218 #define NATIVE_LENGTH (len) 219 220 NATIVE_SYSCTL2_GET(sysname, CTL_KERN, KERN_OSTYPE) { 221 } NATIVE_SET; 222 223 NATIVE_SYSCTL2_GET(hostname, CTL_KERN, KERN_HOSTNAME) { 224 } NATIVE_SET; 225 226 NATIVE_SYSCTL2_GET(release, CTL_KERN, KERN_OSRELEASE) { 227 } NATIVE_SET; 228 229 NATIVE_SYSCTL2_GET(version, CTL_KERN, KERN_VERSION) { 230 size_t n; 231 char *p; 232 233 p = NATIVE_BUFFER; 234 n = NATIVE_LENGTH; 235 for (; n--; ++p) 236 if (*p == '\n' || *p == '\t') 237 *p = ' '; 238 } NATIVE_SET; 239 240 NATIVE_SYSCTL2_GET(machine, CTL_HW, HW_MACHINE) { 241 } NATIVE_SET; 242 243 NATIVE_SYSCTL2_GET(arch, CTL_HW, HW_MACHINE_ARCH) { 244 } NATIVE_SET; 245 246 NATIVE_SYSCTLNAME_GET(ident, "kern.ident") { 247 } NATIVE_SET; 248 249 void 250 usage(void) 251 { 252 fprintf(stderr, "usage: uname [-aimnprsv]\n"); 253 exit(1); 254 } 255