usr.bin/uname/uname.c

   1 /*      $NetBSD: uname.c,v 1.11 2011/09/06 18:35:13 joerg Exp $ */
   2
   3 /*
   4  * Copyright (c) 1994 Winning Strategies, Inc.
   5  * All rights reserved.
   6  *
   7  * Redistribution and use in source and binary forms, with or without
   8  * modification, are permitted provided that the following conditions
   9  * are met:
  10  * 1. Redistributions of source code must retain the above copyright
  11  *    notice, this list of conditions and the following disclaimer.
  12  * 2. Redistributions in binary form must reproduce the above copyright
  13  *    notice, this list of conditions and the following disclaimer in the
  14  *    documentation and/or other materials provided with the distribution.
  15  * 3. All advertising materials mentioning features or use of this software
  16  *    must display the following acknowledgement:
  17  *      This product includes software developed by Winning Strategies, Inc.
  18  * 4. The name of Winning Strategies, Inc. may not be used to endorse or
  19  *    promote products derived from this software without specific prior
  20  *    written permission.
  21  *
  22  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
  23  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
  24  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
  25  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
  26  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
  27  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  28  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  29  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  30  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
  31  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  32  */
  33
  34 #include <sys/cdefs.h>
  35 #ifndef lint
  36 __RCSID("$NetBSD: uname.c,v 1.11 2011/09/06 18:35:13 joerg Exp $");
  37 #endif /* not lint */
  38
  39 #include <sys/param.h>
  40 #include <limits.h>
  41 #include <locale.h>
  42 #include <stdio.h>
  43 #include <stdlib.h>
  44 #include <unistd.h>
  45 #include <err.h>
  46
  47 #include <sys/sysctl.h>
  48 #include <sys/utsname.h>
  49
  50 __dead static void usage(void);
  51
  52 /* Note that PRINT_MACHINE_ARCH is excluded from PRINT_ALL! */
  53 #define PRINT_SYSNAME           0x01
  54 #define PRINT_NODENAME          0x02
  55 #define PRINT_RELEASE           0x04
  56 #define PRINT_VERSION           0x08
  57 #define PRINT_MACHINE           0x10
  58 #define PRINT_MACHINE_ARCH      0x20
  59 #define PRINT_ALL               \
  60     (PRINT_SYSNAME|PRINT_NODENAME|PRINT_RELEASE|PRINT_VERSION|PRINT_MACHINE)
  61
  62 int
  63 main(int argc, char **argv)
  64 {
  65         struct utsname u;
  66         char machine_arch[SYS_NMLN];
  67         int c;
  68         int space = 0;
  69         int print_mask = 0;
  70
  71         (void)setlocale(LC_ALL, "");
  72
  73         while ((c = getopt(argc,argv,"amnprsv")) != -1) {
  74                 switch (c) {
  75                 case 'a':
  76                         print_mask |= PRINT_ALL;
  77                         break;
  78                 case 'm':
  79                         print_mask |= PRINT_MACHINE;
  80                         break;
  81                 case 'n':
  82                         print_mask |= PRINT_NODENAME;
  83                         break;
  84                 case 'p':
  85                         print_mask |= PRINT_MACHINE_ARCH;
  86                         break;
  87                 case 'r':
  88                         print_mask |= PRINT_RELEASE;
  89                         break;
  90                 case 's':
  91                         print_mask |= PRINT_SYSNAME;
  92                         break;
  93                 case 'v':
  94                         print_mask |= PRINT_VERSION;
  95                         break;
  96                 default:
  97                         usage();
  98                         /* NOTREACHED */
  99                 }
 100         }
 101
 102         if (optind != argc) {
 103                 usage();
 104                 /* NOTREACHED */
 105         }
 106
 107         if (!print_mask) {
 108                 print_mask = PRINT_SYSNAME;
 109         }
 110
 111         if (uname(&u) != 0) {
 112                 err(EXIT_FAILURE, "uname");
 113                 /* NOTREACHED */
 114         }
 115         if (print_mask & PRINT_MACHINE_ARCH) {
 116                 int mib[2] = { CTL_HW, HW_MACHINE_ARCH };
 117                 size_t len = sizeof (machine_arch);
 118
 119                 if (sysctl(mib, sizeof (mib) / sizeof (mib[0]), machine_arch,
 120                     &len, NULL, 0) < 0)
 121                         err(EXIT_FAILURE, "sysctl");
 122         }
 123
 124         if (print_mask & PRINT_SYSNAME) {
 125                 space++;
 126                 fputs(u.sysname, stdout);
 127         }
 128         if (print_mask & PRINT_NODENAME) {
 129                 if (space++) putchar(' ');
 130                 fputs(u.nodename, stdout);
 131         }
 132         if (print_mask & PRINT_RELEASE) {
 133                 if (space++) putchar(' ');
 134                 fputs(u.release, stdout);
 135         }
 136         if (print_mask & PRINT_VERSION) {
 137                 if (space++) putchar(' ');
 138                 fputs(u.version, stdout);
 139         }
 140         if (print_mask & PRINT_MACHINE) {
 141                 if (space++) putchar(' ');
 142                 fputs(u.machine, stdout);
 143         }
 144         if (print_mask & PRINT_MACHINE_ARCH) {
 145                 if (space++) putchar(' ');
 146                 fputs(machine_arch, stdout);
 147         }
 148         putchar('\n');
 149
 150         exit(EXIT_SUCCESS);
 151         /* NOTREACHED */
 152 }
 153
 154 static void
 155 usage(void)
 156 {
 157         fprintf(stderr, "usage: uname [-amnprsv]\n");
 158         exit(EXIT_FAILURE);
 159 }