lib/libc/gen/uname.c

   1 /*-
   2  * Copyright (c) 1994
   3  *      The Regents of the University of California.  All rights reserved.
   4  *
   5  * Redistribution and use in source and binary forms, with or without
   6  * modification, are permitted provided that the following conditions
   7  * are met:
   8  * 1. Redistributions of source code must retain the above copyright
   9  *    notice, this list of conditions and the following disclaimer.
  10  * 2. Redistributions in binary form must reproduce the above copyright
  11  *    notice, this list of conditions and the following disclaimer in the
  12  *    documentation and/or other materials provided with the distribution.
  13  * 3. All advertising materials mentioning features or use of this software
  14  *    must display the following acknowledgement:
  15  *      This product includes software developed by the University of
  16  *      California, Berkeley and its contributors.
  17  * 4. Neither the name of the University nor the names of its contributors
  18  *    may be used to endorse or promote products derived from this software
  19  *    without specific prior written permission.
  20  *
  21  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  22  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  23  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  24  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  25  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  26  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  27  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  28  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  29  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  30  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  31  * SUCH DAMAGE.
  32  *
  33  * @(#)uname.c  8.1 (Berkeley) 1/4/94
  34  * $FreeBSD: src/lib/libc/gen/uname.c,v 1.7 1999/08/27 23:59:06 peter Exp $
  35  * $DragonFly: src/lib/libc/gen/uname.c,v 1.5 2007/01/19 07:23:40 dillon Exp $
  36  */
  37
  38 #include <sys/param.h>
  39 #include <sys/sysctl.h>
  40 #include <sys/utsname.h>
  41 #include <errno.h>
  42
  43 int
  44 uname(struct utsname *name)
  45 {
  46         int mib[2], rval;
  47         size_t len;
  48         char *p;
  49         int oerrno;
  50
  51         rval = 0;
  52
  53         mib[0] = CTL_KERN;
  54         mib[1] = KERN_OSTYPE;
  55         len = sizeof(name->sysname);
  56         oerrno = errno;
  57         if (sysctl(mib, 2, &name->sysname, &len, NULL, 0) == -1) {
  58                 if(errno == ENOMEM)
  59                         errno = oerrno;
  60                 else
  61                         rval = -1;
  62         }
  63         name->sysname[sizeof(name->sysname) - 1] = '\0';
  64
  65         mib[0] = CTL_KERN;
  66         mib[1] = KERN_HOSTNAME;
  67         len = sizeof(name->nodename);
  68         oerrno = errno;
  69         if (sysctl(mib, 2, &name->nodename, &len, NULL, 0) == -1) {
  70                 if(errno == ENOMEM)
  71                         errno = oerrno;
  72                 else
  73                         rval = -1;
  74         }
  75         name->nodename[sizeof(name->nodename) - 1] = '\0';
  76
  77         mib[0] = CTL_KERN;
  78         mib[1] = KERN_OSRELEASE;
  79         len = sizeof(name->release);
  80         oerrno = errno;
  81         if (sysctl(mib, 2, &name->release, &len, NULL, 0) == -1) {
  82                 if(errno == ENOMEM)
  83                         errno = oerrno;
  84                 else
  85                         rval = -1;
  86         }
  87         name->release[sizeof(name->release) - 1] = '\0';
  88
  89         /* The version may have newlines in it, turn them into spaces. */
  90         mib[0] = CTL_KERN;
  91         mib[1] = KERN_VERSION;
  92         len = sizeof(name->version);
  93         oerrno = errno;
  94         if (sysctl(mib, 2, &name->version, &len, NULL, 0) == -1) {
  95                 if (errno == ENOMEM)
  96                         errno = oerrno;
  97                 else
  98                         rval = -1;
  99         }
 100         name->version[sizeof(name->version) - 1] = '\0';
 101         for (p = name->version; len--; ++p) {
 102                 if (*p == '\n' || *p == '\t') {
 103                         if (len > 1)
 104                                 *p = ' ';
 105                         else
 106                                 *p = '\0';
 107                 }
 108         }
 109
 110         oerrno = errno;
 111         mib[1] = HW_MACHINE;
 112         mib[0] = CTL_HW;
 113         len = sizeof(name->machine);
 114         if (sysctl(mib, 2, &name->machine, &len, NULL, 0) == -1) {
 115                 if (errno == ENOMEM) {
 116                         errno = oerrno;
 117                 } else {
 118                         rval = -1;
 119                 }
 120         }
 121         name->machine[sizeof(name->machine) - 1] = '\0';
 122         return (rval);
 123 }