lib/libc/gen/uname.c

   1 /*      $NetBSD: uname.c,v 1.12 2014/06/14 13:09:37 apb Exp $   */
   2
   3 /*-
   4  * Copyright (c) 1994
   5  *      The Regents of the University of California.  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. Neither the name of the University nor the names of its contributors
  16  *    may be used to endorse or promote products derived from this software
  17  *    without specific prior written permission.
  18  *
  19  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  20  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  21  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  22  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  23  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  24  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  25  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  26  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  27  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  28  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  29  * SUCH DAMAGE.
  30  */
  31
  32 #include <sys/cdefs.h>
  33 #if defined(LIBC_SCCS) && !defined(lint)
  34 #if 0
  35 static char sccsid[] = "@(#)uname.c     8.1 (Berkeley) 1/4/94";
  36 #else
  37 __RCSID("$NetBSD: uname.c,v 1.12 2014/06/14 13:09:37 apb Exp $");
  38 #endif
  39 #endif /* LIBC_SCCS and not lint */
  40
  41 #include "namespace.h"
  42 #include <sys/param.h>
  43 #include <sys/sysctl.h>
  44 #include <sys/utsname.h>
  45
  46 #include <assert.h>
  47 #include <errno.h>
  48
  49 #ifdef __weak_alias
  50 __weak_alias(uname,_uname)
  51 #endif
  52
  53 int
  54 uname(struct utsname *name)
  55 {
  56         int mib[2];
  57         size_t len;
  58         char *p;
  59
  60         _DIAGASSERT(name != NULL);
  61
  62         mib[0] = CTL_KERN;
  63         mib[1] = KERN_OSTYPE;
  64         len = sizeof(name->sysname);
  65         if (sysctl(mib, 2, &name->sysname, &len, NULL, 0) == -1)
  66                 goto error;
  67
  68         mib[0] = CTL_KERN;
  69         mib[1] = KERN_HOSTNAME;
  70         len = sizeof(name->nodename);
  71         if (sysctl(mib, 2, &name->nodename, &len, NULL, 0) == -1)
  72                 goto error;
  73
  74         mib[0] = CTL_KERN;
  75         mib[1] = KERN_OSRELEASE;
  76         len = sizeof(name->release);
  77         if (sysctl(mib, 2, &name->release, &len, NULL, 0) == -1)
  78                 goto error;
  79
  80         mib[0] = CTL_KERN;
  81         mib[1] = KERN_VERSION;
  82         len = sizeof(name->version);
  83         if (sysctl(mib, 2, &name->version, &len, NULL, 0) == -1) {
  84                 if (errno == ENOMEM) {
  85                         /*
  86                          * string is too long for {struct utsname}.version.
  87                          * Just use the truncated string.
  88                          * XXX: We could mark the truncation with "..."
  89                          */
  90                         name->version[sizeof(name->version) - 1] = '\0';
  91                 }
  92                 else goto error;
  93         }
  94
  95         /* The version may have newlines in it, turn them into spaces. */
  96         for (p = name->version; len--; ++p) {
  97                 if (*p == '\n' || *p == '\t') {
  98                         if (len > 1)
  99                                 *p = ' ';
 100                         else
 101                                 *p = '\0';
 102                 }
 103         }
 104
 105         mib[0] = CTL_HW;
 106         mib[1] = HW_MACHINE;
 107         len = sizeof(name->machine);
 108         if (sysctl(mib, 2, &name->machine, &len, NULL, 0) == -1)
 109                 goto error;
 110         return (0);
 111
 112 error:
 113         return (-1);
 114 }