freebsd-dev/lib/libc/gen/getosreldate.c
Doug Ambrisko d630a05f40 Add support to easily build FreeBSD unpacked in a chroot of another
FreeBSD machine.  To do this add the man 1 uname changes to __xuname.c
so we can override the settings it reports.  Add OSVERSION override
to getosreldate.  Finally which Makefile.inc1 to use uname -m instead
of  sysctl -n hw.machine_arch to get the arch. type.

With these change you can put a complete FreeBSD OS image into a
chroot set:
	UNAME_s=FreeBSD
	UNAME_r=4.7-RELEASE
	UNAME_v="FreeBSD $UNAME_r #1: Fri Jul 22 20:32:52 PDT 2005 fake@fake:/usr/obj/usr/src/sys/FAKE"
	UNAME_m=i386
	UNAME_p=i386
	OSVERSION=470000
on an amd64 or i386 and it just work including building ports and using
pkg_add -r etc.  The caveat for this example is that these patches
have to be applied to FreeBSD 4.7 and the uname(1) changes need to
be merged.  This also addresses issue with libtool.

This is usefull for when a build machine has been trashed for an
old release and we want to do a build on a new machine that FreeBSD
4.7 won't run on ...
2005-12-02 00:50:30 +00:00

64 lines
2.3 KiB
C

/*
* Copyright (c) 1989, 1993
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#if defined(LIBC_SCCS) && !defined(lint)
static char sccsid[] = "@(#)gethostid.c 8.1 (Berkeley) 6/2/93";
#endif /* LIBC_SCCS and not lint */
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/sysctl.h>
#include <stdlib.h>
#include <osreldate.h>
int
getosreldate(void)
{
int mib[2];
size_t size;
int value;
char *temp;
mib[0] = CTL_KERN;
mib[1] = KERN_OSRELDATE;
size = sizeof value;
if (sysctl(mib, 2, &value, &size, NULL, 0) == -1)
return (-1);
if ((temp = getenv("OSVERSION")))
value = atoi(temp);
return (value);
}