usr.bin/uname/uname.c

   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 #include <osreldate.h>
  58
  59 #define MFLAG   0x01
  60 #define NFLAG   0x02
  61 #define PFLAG   0x04
  62 #define RFLAG   0x08
  63 #define SFLAG   0x10
  64 #define VFLAG   0x20
  65 #define IFLAG   0x40
  66 #define UFLAG   0x80
  67 #define KFLAG   0x100
  68
  69 typedef void (*get_t)(void);
  70 static get_t get_ident, get_platform, get_hostname, get_arch,
  71     get_release, get_sysname, get_kernvers, get_uservers, get_version;
  72
  73 static void native_ident(void);
  74 static void native_platform(void);
  75 static void native_hostname(void);
  76 static void native_arch(void);
  77 static void native_release(void);
  78 static void native_sysname(void);
  79 static void native_version(void);
  80 static void native_kernvers(void);
  81 static void native_uservers(void);
  82 static void print_uname(u_int);
  83 static void setup_get(void);
  84 static void usage(void);
  85
  86 static char *ident, *platform, *hostname, *arch, *release, *sysname, *version, *kernvers, *uservers;
  87 static int space;
  88
  89 int
  90 main(int argc, char *argv[])
  91 {
  92         u_int flags;
  93         int ch;
  94
  95         setup_get();
  96         flags = 0;
  97
  98         while ((ch = getopt(argc, argv, "aiKmnoprsUv")) != -1)
  99                 switch(ch) {
 100                 case 'a':
 101                         flags |= (MFLAG | NFLAG | RFLAG | SFLAG | VFLAG);
 102                         break;
 103                 case 'i':
 104                         flags |= IFLAG;
 105                         break;
 106                 case 'K':
 107                         flags |= KFLAG;
 108                         break;
 109                 case 'm':
 110                         flags |= MFLAG;
 111                         break;
 112                 case 'n':
 113                         flags |= NFLAG;
 114                         break;
 115                 case 'p':
 116                         flags |= PFLAG;
 117                         break;
 118                 case 'r':
 119                         flags |= RFLAG;
 120                         break;
 121                 case 's':
 122                 case 'o':
 123                         flags |= SFLAG;
 124                         break;
 125                 case 'U':
 126                         flags |= UFLAG;
 127                         break;
 128                 case 'v':
 129                         flags |= VFLAG;
 130                         break;
 131                 case '?':
 132                 default:
 133                         usage();
 134                 }
 135
 136         argc -= optind;
 137         argv += optind;
 138
 139         if (argc)
 140                 usage();
 141
 142         if (!flags)
 143                 flags |= SFLAG;
 144
 145         print_uname(flags);
 146         exit(0);
 147 }
 148
 149 #define CHECK_ENV(opt,var)                              \
 150 do {                                                    \
 151         if ((var = getenv("UNAME_" opt)) == NULL) {     \
 152                 get_##var = native_##var;               \
 153         } else {                                        \
 154                 get_##var = (get_t)NULL;                \
 155         }                                               \
 156 } while (0)
 157
 158 static void
 159 setup_get(void)
 160 {
 161         CHECK_ENV("s", sysname);
 162         CHECK_ENV("n", hostname);
 163         CHECK_ENV("r", release);
 164         CHECK_ENV("v", version);
 165         CHECK_ENV("m", platform);
 166         CHECK_ENV("p", arch);
 167         CHECK_ENV("i", ident);
 168         CHECK_ENV("K", kernvers);
 169         CHECK_ENV("U", uservers);
 170 }
 171
 172 #define PRINT_FLAG(flags,flag,var)              \
 173         if ((flags & flag) == flag) {           \
 174                 if (space)                      \
 175                         printf(" ");            \
 176                 else                            \
 177                         space++;                \
 178                 if (get_##var != NULL)          \
 179                         (*get_##var)();         \
 180                 printf("%s", var);              \
 181         }
 182
 183 static void
 184 print_uname(u_int flags)
 185 {
 186         PRINT_FLAG(flags, SFLAG, sysname);
 187         PRINT_FLAG(flags, NFLAG, hostname);
 188         PRINT_FLAG(flags, RFLAG, release);
 189         PRINT_FLAG(flags, VFLAG, version);
 190         PRINT_FLAG(flags, MFLAG, platform);
 191         PRINT_FLAG(flags, PFLAG, arch);
 192         PRINT_FLAG(flags, IFLAG, ident);
 193         PRINT_FLAG(flags, KFLAG, kernvers);
 194         PRINT_FLAG(flags, UFLAG, uservers);
 195         printf("\n");
 196 }
 197
 198 #define NATIVE_SYSCTL2_GET(var,mib0,mib1)       \
 199 static void                                     \
 200 native_##var(void)                              \
 201 {                                               \
 202         int mib[] = { (mib0), (mib1) };         \
 203         size_t len;                             \
 204         static char buf[1024];                  \
 205         char **varp = &(var);                   \
 206                                                 \
 207         len = sizeof buf;                       \
 208         if (sysctl(mib, sizeof mib / sizeof mib[0],     \
 209            &buf, &len, NULL, 0) == -1)          \
 210                 err(1, "sysctl");
 211
 212 #define NATIVE_SYSCTLNAME_GET(var,name)         \
 213 static void                                     \
 214 native_##var(void)                              \
 215 {                                               \
 216         size_t len;                             \
 217         static char buf[1024];                  \
 218         char **varp = &(var);                   \
 219                                                 \
 220         len = sizeof buf;                       \
 221         if (sysctlbyname(name, &buf, &len, NULL,\
 222             0) == -1)                           \
 223                 err(1, "sysctlbyname");
 224
 225 #define NATIVE_SET                              \
 226         *varp = buf;                            \
 227         return;                                 \
 228 }       struct __hack
 229
 230 #define NATIVE_BUFFER   (buf)
 231 #define NATIVE_LENGTH   (len)
 232
 233 NATIVE_SYSCTL2_GET(sysname, CTL_KERN, KERN_OSTYPE) {
 234 } NATIVE_SET;
 235
 236 NATIVE_SYSCTL2_GET(hostname, CTL_KERN, KERN_HOSTNAME) {
 237 } NATIVE_SET;
 238
 239 NATIVE_SYSCTL2_GET(release, CTL_KERN, KERN_OSRELEASE) {
 240 } NATIVE_SET;
 241
 242 NATIVE_SYSCTL2_GET(version, CTL_KERN, KERN_VERSION) {
 243         size_t n;
 244         char *p;
 245
 246         p = NATIVE_BUFFER;
 247         n = NATIVE_LENGTH;
 248         for (; n--; ++p)
 249                 if (*p == '\n' || *p == '\t')
 250                         *p = ' ';
 251 } NATIVE_SET;
 252
 253 NATIVE_SYSCTL2_GET(platform, CTL_HW, HW_MACHINE) {
 254 } NATIVE_SET;
 255
 256 NATIVE_SYSCTL2_GET(arch, CTL_HW, HW_MACHINE_ARCH) {
 257 } NATIVE_SET;
 258
 259 NATIVE_SYSCTLNAME_GET(ident, "kern.ident") {
 260 } NATIVE_SET;
 261
 262 static void
 263 native_uservers(void)
 264 {
 265         static char buf[128];
 266
 267         snprintf(buf, sizeof(buf), "%d", __FreeBSD_version);
 268         uservers = buf;
 269 }
 270
 271 static void
 272 native_kernvers(void)
 273 {
 274         static char buf[128];
 275
 276         snprintf(buf, sizeof(buf), "%d", getosreldate());
 277         kernvers = buf;
 278 }
 279
 280 static void
 281 usage(void)
 282 {
 283         fprintf(stderr, "usage: uname [-aiKmnoprsUv]\n");
 284         exit(1);
 285 }