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Allow bootstrapping pwd_mkdb on Linux/macOS

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We need to provide a struct passwd that is compatible with the target
system and this is not the case when cross-building from macOS/Linux.
It should also be a problem when bootstrapping for an i386 target from a
FreeBSD amd64 host since time_t does not match across those systems.
However, pwd_mkdb always truncates integer values to 32-bit so this
difference does not result in different databases.

Reviewed By:	brooks
Differential Revision: https://reviews.freebsd.org/D25931
This commit is contained in:
Alex Richardson 2020-08-06 20:46:13 +00:00
parent 5ac01ce026
commit a583962d61
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=363992
2 changed files with 69 additions and 0 deletions
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3
usr.sbin/pwd_mkdb/Makefile
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@ -9,5 +9,8 @@ MAN= pwd_mkdb.8
SRCS= pw_scan.c pwd_mkdb.c
CFLAGS+= -I${SRCTOP}/lib/libc/gen # for pw_scan.h
.if defined(BOOTSTRAPPING)
CFLAGS+=-I${.CURDIR}
.endif
.include <bsd.prog.mk>

66
usr.sbin/pwd_mkdb/pwd.h Normal file
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@ -0,0 +1,66 @@
/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright 2018-2020 Alex Richardson <arichardson@FreeBSD.org>
*
* This software was developed by SRI International and the University of
* Cambridge Computer Laboratory (Department of Computer Science and
* Technology) under DARPA contract HR0011-18-C-0016 ("ECATS"), as part of the
* DARPA SSITH research programme.
*
* This software was developed by SRI International and the University of
* Cambridge Computer Laboratory under DARPA/AFRL contract (FA8750-10-C-0237)
* ("CTSRD"), as part of the DARPA CRASH research programme.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
* $FreeBSD$
*/
/*
* When building pwd_mkdb we need to use target systems definition of
* struct passwd. This protects against future changes to struct passwd and
* is essential to allow cross-building from Linux/macOS hosts since the
* structure is not compatible there.
*/
#include <stdint.h>
#include <stddef.h>
/*
* Note: pwd_mkdb always stores uint32_t for all integer fields (including
* time_t!) so these definitions do not need to match sys/sys/_types.h
*/
typedef uint32_t _bootstrap_gid_t;
typedef uint32_t _bootstrap_uid_t;
typedef uint64_t _bootstrap_time_t;
#define _GID_T_DECLARED
#define _TIME_T_DECLARED
#define _UID_T_DECLARED
#define _SIZE_T_DECLARED
#define gid_t _bootstrap_gid_t
#define uid_t _bootstrap_uid_t
#define time_t _bootstrap_time_t
#define passwd _bootstrap_passwd
#include "../../include/pwd.h"
#undef gid_t
#undef uid_t
#undef time_t