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