bin/uname/uname.c

   1 /*      $OpenBSD: uname.c,v 1.19 2016/10/28 07:22:59 schwarze 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/utsname.h>
  35 #include <sys/systeminfo.h>
  36
  37 #include <err.h>
  38 #include <stdio.h>
  39 #include <stdlib.h>
  40 #include <unistd.h>
  41
  42 #define __dead __attribute__((__noreturn__))
  43 #define pledge(request, paths) 0
  44 static void __dead usage(void);
  45
  46 #define PRINT_SYSNAME           0x01
  47 #define PRINT_NODENAME          0x02
  48 #define PRINT_RELEASE           0x04
  49 #define PRINT_VERSION           0x08
  50 #define PRINT_MACHINE           0x10
  51 #define PRINT_ALL               0x1f
  52 #define PRINT_MACHINE_ARCH      0x20
  53
  54 int
  55 main(int argc, char *argv[])
  56 {
  57         struct utsname u;
  58         int c;
  59         int space = 0;
  60         int print_mask = 0;
  61
  62         if (pledge("stdio", NULL) == -1)
  63                 err(1, "pledge");
  64
  65         while ((c = getopt(argc, argv, "amnrsvp")) != -1 ) {
  66                 switch (c) {
  67                 case 'a':
  68                         print_mask |= PRINT_ALL;
  69                         break;
  70                 case 'm':
  71                         print_mask |= PRINT_MACHINE;
  72                         break;
  73                 case 'n':
  74                         print_mask |= PRINT_NODENAME;
  75                         break;
  76                 case 'p':
  77                         print_mask |= PRINT_MACHINE_ARCH;
  78                         break;
  79                 case 'r':
  80                         print_mask |= PRINT_RELEASE;
  81                         break;
  82                 case 's':
  83                         print_mask |= PRINT_SYSNAME;
  84                         break;
  85                 case 'v':
  86                         print_mask |= PRINT_VERSION;
  87                         break;
  88                 default:
  89                         usage();
  90                 }
  91         }
  92
  93         if (optind != argc)
  94                 usage();
  95
  96         if (!print_mask)
  97                 print_mask = PRINT_SYSNAME;
  98
  99         if (uname(&u) == -1)
 100                 err(1, NULL);
 101
 102         if (print_mask & PRINT_SYSNAME) {
 103                 space++;
 104                 fputs(u.sysname, stdout);
 105         }
 106         if (print_mask & PRINT_NODENAME) {
 107                 if (space++)
 108                         putchar(' ');
 109
 110                 fputs(u.nodename, stdout);
 111         }
 112         if (print_mask & PRINT_RELEASE) {
 113                 if (space++)
 114                         putchar(' ');
 115
 116                 fputs(u.release, stdout);
 117         }
 118         if (print_mask & PRINT_VERSION) {
 119                 if (space++)
 120                         putchar(' ');
 121
 122                 fputs(u.version, stdout);
 123         }
 124         if (print_mask & PRINT_MACHINE) {
 125                 if (space++)
 126                         putchar(' ');
 127
 128                 fputs(u.machine, stdout);
 129         }
 130         if (print_mask & PRINT_MACHINE_ARCH) {
 131                 if (space++)
 132                         putchar(' ');
 133
 134                 char buf[SYS_NMLN];
 135                 if (sysinfo(SI_ARCHITECTURE, buf, SYS_NMLN) < 0)
 136                         err(1, "sysinfo");
 137                 fputs(buf, stdout);
 138         }
 139         putchar('\n');
 140
 141         return 0;
 142 }
 143
 144 static void __dead
 145 usage(void)
 146 {
 147         fprintf(stderr, "usage: uname [-amnprsv]\n");
 148         exit(1);
 149 }