src/uname.c

   1 /* uname -- print system information
   2    Copyright (C) 1989-1999 Free Software Foundation, Inc.
   3
   4    This program is free software; you can redistribute it and/or modify
   5    it under the terms of the GNU General Public License as published by
   6    the Free Software Foundation; either version 2, or (at your option)
   7    any later version.
   8
   9    This program is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12    GNU General Public License for more details.
  13
  14    You should have received a copy of the GNU General Public License
  15    along with this program; if not, write to the Free Software Foundation,
  16    Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
  17
  18 /* Option               Example
  19
  20    -s, --sysname        SunOS
  21    -n, --nodename       rocky8
  22    -r, --release        4.0
  23    -v, --version
  24    -m, --machine        sun
  25    -a, --all            SunOS rocky8 4.0  sun
  26
  27    The default behavior is equivalent to `-s'.
  28
  29    David MacKenzie <djm@gnu.ai.mit.edu> */
  30
  31 #include <config.h>
  32 #include <stdio.h>
  33 #include <sys/types.h>
  34 #include <sys/utsname.h>
  35 #include <getopt.h>
  36
  37 #if defined (HAVE_SYSINFO) && defined (HAVE_SYS_SYSTEMINFO_H)
  38 # include <sys/systeminfo.h>
  39 #endif
  40
  41 #include "system.h"
  42 #include "error.h"
  43
  44 /* The official name of this program (e.g., no `g' prefix).  */
  45 #define PROGRAM_NAME "uname"
  46
  47 #define AUTHORS "David MacKenzie"
  48
  49 static void print_element PARAMS ((unsigned int mask, char *element));
  50
  51 /* Values that are bitwise or'd into `toprint'. */
  52 /* Operating system name. */
  53 #define PRINT_SYSNAME 1
  54
  55 /* Node name on a communications network. */
  56 #define PRINT_NODENAME 2
  57
  58 /* Operating system release. */
  59 #define PRINT_RELEASE 4
  60
  61 /* Operating system version. */
  62 #define PRINT_VERSION 8
  63
  64 /* Machine hardware name. */
  65 #define PRINT_MACHINE 16
  66
  67  /* Host processor type. */
  68 #define PRINT_PROCESSOR 32
  69
  70 /* Mask indicating which elements of the name to print. */
  71 static unsigned char toprint;
  72
  73 /* The name this program was run with, for error messages. */
  74 char *program_name;
  75
  76 static struct option const long_options[] =
  77 {
  78   {"machine", no_argument, NULL, 'm'},
  79   {"nodename", no_argument, NULL, 'n'},
  80   {"release", no_argument, NULL, 'r'},
  81   {"sysname", no_argument, NULL, 's'},
  82   {"processor", no_argument, NULL, 'p'},
  83   {"all", no_argument, NULL, 'a'},
  84   {GETOPT_HELP_OPTION_DECL},
  85   {GETOPT_VERSION_OPTION_DECL},
  86   {NULL, 0, NULL, 0}
  87 };
  88
  89 void
  90 usage (int status)
  91 {
  92   if (status != 0)
  93     fprintf (stderr, _("Try `%s --help' for more information.\n"),
  94              program_name);
  95   else
  96     {
  97       printf (_("Usage: %s [OPTION]...\n"), program_name);
  98       printf (_("\
  99 Print certain system information.  With no OPTION, same as -s.\n\
 100 \n\
 101   -a, --all        print all information\n\
 102   -m, --machine    print the machine (hardware) type\n\
 103   -n, --nodename   print the machine's network node hostname\n\
 104   -r, --release    print the operating system release\n\
 105   -s, --sysname    print the operating system name\n\
 106   -p, --processor  print the host processor type\n\
 107   -v               print the operating system version\n\
 108       --help       display this help and exit\n\
 109       --version    output version information and exit\n"));
 110       puts (_("\nReport bugs to <bug-sh-utils@gnu.org>."));
 111     }
 112   exit (status);
 113 }
 114
 115 int
 116 main (int argc, char **argv)
 117 {
 118   struct utsname name;
 119   int c;
 120   char processor[256];
 121
 122   program_name = argv[0];
 123   setlocale (LC_ALL, "");
 124   bindtextdomain (PACKAGE, LOCALEDIR);
 125   textdomain (PACKAGE);
 126
 127   toprint = 0;
 128
 129   while ((c = getopt_long (argc, argv, "snrvpma", long_options, NULL)) != -1)
 130     {
 131       switch (c)
 132         {
 133         case 0:
 134           break;
 135
 136         case 's':
 137           toprint |= PRINT_SYSNAME;
 138           break;
 139
 140         case 'n':
 141           toprint |= PRINT_NODENAME;
 142           break;
 143
 144         case 'r':
 145           toprint |= PRINT_RELEASE;
 146           break;
 147
 148         case 'v':
 149           toprint |= PRINT_VERSION;
 150           break;
 151
 152         case 'm':
 153           toprint |= PRINT_MACHINE;
 154           break;
 155
 156         case 'p':
 157           toprint |= PRINT_PROCESSOR;
 158           break;
 159
 160         case 'a':
 161           toprint = (PRINT_SYSNAME | PRINT_NODENAME | PRINT_RELEASE |
 162                      PRINT_PROCESSOR | PRINT_VERSION | PRINT_MACHINE);
 163           break;
 164
 165         case_GETOPT_HELP_CHAR;
 166
 167         case_GETOPT_VERSION_CHAR (PROGRAM_NAME, AUTHORS);
 168
 169         default:
 170           usage (1);
 171         }
 172     }
 173
 174   if (optind != argc)
 175     usage (1);
 176
 177   if (toprint == 0)
 178     toprint = PRINT_SYSNAME;
 179
 180   if (uname (&name) == -1)
 181     error (1, errno, _("cannot get system name"));
 182
 183 #if defined (HAVE_SYSINFO) && defined (SI_ARCHITECTURE)
 184   if (sysinfo (SI_ARCHITECTURE, processor, sizeof (processor)) == -1)
 185     error (1, errno, _("cannot get processor type"));
 186 #else
 187   strcpy (processor, "unknown");
 188 #endif
 189
 190   print_element (PRINT_SYSNAME, name.sysname);
 191   print_element (PRINT_NODENAME, name.nodename);
 192   print_element (PRINT_RELEASE, name.release);
 193   print_element (PRINT_VERSION, name.version);
 194   print_element (PRINT_MACHINE, name.machine);
 195   print_element (PRINT_PROCESSOR, processor);
 196
 197   exit (0);
 198 }
 199
 200 /* If the name element set in MASK is selected for printing in `toprint',
 201    print ELEMENT; then print a space unless it is the last element to
 202    be printed, in which case print a newline. */
 203
 204 static void
 205 print_element (unsigned int mask, char *element)
 206 {
 207   if (toprint & mask)
 208     {
 209       toprint &= ~mask;
 210       printf ("%s%c", element, toprint ? ' ' : '\n');
 211     }
 212 }