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      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 }
    115