src/uname.c

   1 /* uname -- print system information
   2
   3    Copyright (C) 1989, 1992, 1993, 1996, 1997, 1999-2005,
   4    2007-2009 Free Software Foundation, Inc.
   5
   6    This program is free software: you can redistribute it and/or modify
   7    it under the terms of the GNU General Public License as published by
   8    the Free Software Foundation, either version 3 of the License, or
   9    (at your option) any later version.
  10
  11    This program is distributed in the hope that it will be useful,
  12    but WITHOUT ANY WARRANTY; without even the implied warranty of
  13    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  14    GNU General Public License for more details.
  15
  16    You should have received a copy of the GNU General Public License
  17    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  18
  19 /* Written by David MacKenzie <djm@gnu.ai.mit.edu> */
  20
  21 #include <config.h>
  22 #include <stdio.h>
  23 #include <sys/types.h>
  24 #include <sys/utsname.h>
  25 #include <getopt.h>
  26
  27 #if HAVE_SYSINFO && HAVE_SYS_SYSTEMINFO_H
  28 # include <sys/systeminfo.h>
  29 #endif
  30
  31 #if HAVE_SYS_SYSCTL_H
  32 # if HAVE_SYS_PARAM_H
  33 #  include <sys/param.h> /* needed for OpenBSD 3.0 */
  34 # endif
  35 # include <sys/sysctl.h>
  36 # ifdef HW_MODEL
  37 #  ifdef HW_MACHINE_ARCH
  38 /* E.g., FreeBSD 4.5, NetBSD 1.5.2 */
  39 #   define UNAME_HARDWARE_PLATFORM HW_MODEL
  40 #   define UNAME_PROCESSOR HW_MACHINE_ARCH
  41 #  else
  42 /* E.g., OpenBSD 3.0 */
  43 #   define UNAME_PROCESSOR HW_MODEL
  44 #  endif
  45 # endif
  46 #endif
  47
  48 #ifdef __APPLE__
  49 # include <mach/machine.h>
  50 # include <mach-o/arch.h>
  51 #endif
  52
  53 #include "system.h"
  54 #include "error.h"
  55 #include "quote.h"
  56 #include "uname.h"
  57
  58 /* The official name of this program (e.g., no `g' prefix).  */
  59 #define PROGRAM_NAME (uname_mode == UNAME_UNAME ? "uname" : "arch")
  60
  61 #define AUTHORS proper_name ("David MacKenzie")
  62 #define ARCH_AUTHORS "David MacKenzie", "Karel Zak"
  63
  64 /* Values that are bitwise or'd into `toprint'. */
  65 /* Kernel name. */
  66 #define PRINT_KERNEL_NAME 1
  67
  68 /* Node name on a communications network. */
  69 #define PRINT_NODENAME 2
  70
  71 /* Kernel release. */
  72 #define PRINT_KERNEL_RELEASE 4
  73
  74 /* Kernel version. */
  75 #define PRINT_KERNEL_VERSION 8
  76
  77 /* Machine hardware name. */
  78 #define PRINT_MACHINE 16
  79
  80 /* Processor type. */
  81 #define PRINT_PROCESSOR 32
  82
  83 /* Hardware platform.  */
  84 #define PRINT_HARDWARE_PLATFORM 64
  85
  86 /* Operating system.  */
  87 #define PRINT_OPERATING_SYSTEM 128
  88
  89 static struct option const uname_long_options[] =
  90 {
  91   {"all", no_argument, NULL, 'a'},
  92   {"kernel-name", no_argument, NULL, 's'},
  93   {"sysname", no_argument, NULL, 's'},  /* Obsolescent.  */
  94   {"nodename", no_argument, NULL, 'n'},
  95   {"kernel-release", no_argument, NULL, 'r'},
  96   {"release", no_argument, NULL, 'r'},  /* Obsolescent.  */
  97   {"kernel-version", no_argument, NULL, 'v'},
  98   {"machine", no_argument, NULL, 'm'},
  99   {"processor", no_argument, NULL, 'p'},
 100   {"hardware-platform", no_argument, NULL, 'i'},
 101   {"operating-system", no_argument, NULL, 'o'},
 102   {GETOPT_HELP_OPTION_DECL},
 103   {GETOPT_VERSION_OPTION_DECL},
 104   {NULL, 0, NULL, 0}
 105 };
 106
 107 static struct option const arch_long_options[] =
 108 {
 109   {GETOPT_HELP_OPTION_DECL},
 110   {GETOPT_VERSION_OPTION_DECL},
 111   {NULL, 0, NULL, 0}
 112 };
 113
 114 void
 115 usage (int status)
 116 {
 117   if (status != EXIT_SUCCESS)
 118     fprintf (stderr, _("Try `%s --help' for more information.\n"),
 119              program_name);
 120   else
 121     {
 122       printf (_("Usage: %s [OPTION]...\n"), program_name);
 123
 124       if (uname_mode == UNAME_UNAME)
 125         {
 126           fputs (_("\
 127 Print certain system information.  With no OPTION, same as -s.\n\
 128 \n\
 129   -a, --all                print all information, in the following order,\n\
 130                              except omit -p and -i if unknown:\n\
 131   -s, --kernel-name        print the kernel name\n\
 132   -n, --nodename           print the network node hostname\n\
 133   -r, --kernel-release     print the kernel release\n\
 134 "), stdout);
 135           fputs (_("\
 136   -v, --kernel-version     print the kernel version\n\
 137   -m, --machine            print the machine hardware name\n\
 138   -p, --processor          print the processor type or \"unknown\"\n\
 139   -i, --hardware-platform  print the hardware platform or \"unknown\"\n\
 140   -o, --operating-system   print the operating system\n\
 141 "), stdout);
 142         }
 143       else
 144         {
 145           fputs (_("\
 146 Print machine architecture.\n\
 147 \n\
 148 "), stdout);
 149         }
 150
 151       fputs (HELP_OPTION_DESCRIPTION, stdout);
 152       fputs (VERSION_OPTION_DESCRIPTION, stdout);
 153       emit_ancillary_info ();
 154     }
 155   exit (status);
 156 }
 157
 158 /* Print ELEMENT, preceded by a space if something has already been
 159    printed.  */
 160
 161 static void
 162 print_element (char const *element)
 163 {
 164   static bool printed;
 165   if (printed)
 166     putchar (' ');
 167   printed = true;
 168   fputs (element, stdout);
 169 }
 170
 171
 172 /* Set all the option flags according to the switches specified.
 173    Return the mask indicating which elements to print.  */
 174
 175 static int
 176 decode_switches (int argc, char **argv)
 177 {
 178   int c;
 179   unsigned int toprint = 0;
 180
 181   if (uname_mode == UNAME_ARCH)
 182     {
 183       while ((c = getopt_long (argc, argv, "",
 184                                arch_long_options, NULL)) != -1)
 185         {
 186           switch (c)
 187             {
 188             case_GETOPT_HELP_CHAR;
 189
 190             case_GETOPT_VERSION_CHAR (PROGRAM_NAME, ARCH_AUTHORS);
 191
 192             default:
 193               usage (EXIT_FAILURE);
 194             }
 195         }
 196       toprint = PRINT_MACHINE;
 197     }
 198   else
 199     {
 200       while ((c = getopt_long (argc, argv, "asnrvmpio",
 201                                uname_long_options, NULL)) != -1)
 202         {
 203           switch (c)
 204             {
 205             case 'a':
 206               toprint = UINT_MAX;
 207               break;
 208
 209             case 's':
 210               toprint |= PRINT_KERNEL_NAME;
 211               break;
 212
 213             case 'n':
 214               toprint |= PRINT_NODENAME;
 215               break;
 216
 217             case 'r':
 218               toprint |= PRINT_KERNEL_RELEASE;
 219               break;
 220
 221             case 'v':
 222               toprint |= PRINT_KERNEL_VERSION;
 223               break;
 224
 225             case 'm':
 226               toprint |= PRINT_MACHINE;
 227               break;
 228
 229             case 'p':
 230               toprint |= PRINT_PROCESSOR;
 231               break;
 232
 233             case 'i':
 234               toprint |= PRINT_HARDWARE_PLATFORM;
 235               break;
 236
 237             case 'o':
 238               toprint |= PRINT_OPERATING_SYSTEM;
 239               break;
 240
 241             case_GETOPT_HELP_CHAR;
 242
 243             case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
 244
 245             default:
 246               usage (EXIT_FAILURE);
 247             }
 248         }
 249     }
 250
 251   if (argc != optind)
 252     {
 253       error (0, 0, _("extra operand %s"), quote (argv[optind]));
 254       usage (EXIT_FAILURE);
 255     }
 256
 257   return toprint;
 258 }
 259
 260 int
 261 main (int argc, char **argv)
 262 {
 263   static char const unknown[] = "unknown";
 264
 265   /* Mask indicating which elements to print. */
 266   unsigned int toprint = 0;
 267
 268   initialize_main (&argc, &argv);
 269   set_program_name (argv[0]);
 270   setlocale (LC_ALL, "");
 271   bindtextdomain (PACKAGE, LOCALEDIR);
 272   textdomain (PACKAGE);
 273
 274   atexit (close_stdout);
 275
 276   toprint = decode_switches (argc, argv);
 277
 278   if (toprint == 0)
 279     toprint = PRINT_KERNEL_NAME;
 280
 281   if (toprint
 282        & (PRINT_KERNEL_NAME | PRINT_NODENAME | PRINT_KERNEL_RELEASE
 283           | PRINT_KERNEL_VERSION | PRINT_MACHINE))
 284     {
 285       struct utsname name;
 286
 287       if (uname (&name) == -1)
 288         error (EXIT_FAILURE, errno, _("cannot get system name"));
 289
 290       if (toprint & PRINT_KERNEL_NAME)
 291         print_element (name.sysname);
 292       if (toprint & PRINT_NODENAME)
 293         print_element (name.nodename);
 294       if (toprint & PRINT_KERNEL_RELEASE)
 295         print_element (name.release);
 296       if (toprint & PRINT_KERNEL_VERSION)
 297         print_element (name.version);
 298       if (toprint & PRINT_MACHINE)
 299         print_element (name.machine);
 300     }
 301
 302   if (toprint & PRINT_PROCESSOR)
 303     {
 304       char const *element = unknown;
 305 #if HAVE_SYSINFO && defined SI_ARCHITECTURE
 306       {
 307         static char processor[257];
 308         if (0 <= sysinfo (SI_ARCHITECTURE, processor, sizeof processor))
 309           element = processor;
 310       }
 311 #endif
 312 #ifdef UNAME_PROCESSOR
 313       if (element == unknown)
 314         {
 315           static char processor[257];
 316           size_t s = sizeof processor;
 317           static int mib[] = { CTL_HW, UNAME_PROCESSOR };
 318           if (sysctl (mib, 2, processor, &s, 0, 0) >= 0)
 319             element = processor;
 320
 321 # ifdef __APPLE__
 322           /* This kludge works around a bug in Mac OS X.  */
 323           if (element == unknown)
 324             {
 325               cpu_type_t cputype;
 326               size_t s = sizeof cputype;
 327               NXArchInfo const *ai;
 328               if (sysctlbyname ("hw.cputype", &cputype, &s, NULL, 0) == 0
 329                   && (ai = NXGetArchInfoFromCpuType (cputype,
 330                                                      CPU_SUBTYPE_MULTIPLE))
 331                   != NULL)
 332                 element = ai->name;
 333
 334               /* Hack "safely" around the ppc vs. powerpc return value. */
 335               if (cputype == CPU_TYPE_POWERPC
 336                   && strncmp (element, "ppc", 3) == 0)
 337                 element = "powerpc";
 338             }
 339 # endif
 340         }
 341 #endif
 342       if (! (toprint == UINT_MAX && element == unknown))
 343         print_element (element);
 344     }
 345
 346   if (toprint & PRINT_HARDWARE_PLATFORM)
 347     {
 348       char const *element = unknown;
 349 #if HAVE_SYSINFO && defined SI_PLATFORM
 350       {
 351         static char hardware_platform[257];
 352         if (0 <= sysinfo (SI_PLATFORM,
 353                           hardware_platform, sizeof hardware_platform))
 354           element = hardware_platform;
 355       }
 356 #endif
 357 #ifdef UNAME_HARDWARE_PLATFORM
 358       if (element == unknown)
 359         {
 360           static char hardware_platform[257];
 361           size_t s = sizeof hardware_platform;
 362           static int mib[] = { CTL_HW, UNAME_HARDWARE_PLATFORM };
 363           if (sysctl (mib, 2, hardware_platform, &s, 0, 0) >= 0)
 364             element = hardware_platform;
 365         }
 366 #endif
 367       if (! (toprint == UINT_MAX && element == unknown))
 368         print_element (element);
 369     }
 370
 371   if (toprint & PRINT_OPERATING_SYSTEM)
 372     print_element (HOST_OPERATING_SYSTEM);
 373
 374   putchar ('\n');
 375
 376   exit (EXIT_SUCCESS);
 377 }