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make config -x look at the booted kernel first.

This commit is contained in:
christos 2012-08-30 12:31:25 +00:00
parent 8588929dc5
commit 8aaed51273
2 changed files with 26 additions and 7 deletions
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16
usr.bin/config/config.1
View File

@ -1,4 +1,4 @@
.\" $NetBSD: config.1,v 1.10 2009/08/31 07:45:24 wiz Exp $
.\" $NetBSD: config.1,v 1.11 2012/08/30 12:31:25 christos Exp $
.\"
.\" Copyright (c) 1980, 1991, 1993
.\" The Regents of the University of California. All rights reserved.
@ -71,9 +71,17 @@ flag), then extracts the embedded configuration file (if any) and
writes it to standard output.
If
.Ar kernel-file
is not given,
.Pa /netbsd
is used.
is not given, and the system is not running
.Nx
an error is printed.
On systems running
.Nx
the booted kernel is looked up using the
.Xr sysctl 3
.Dv machdep.booted_kernel
variable and if that's not found,
.Dv _PATH_UNIX
(/netbsd) is used.
Configuration data will be available if the given kernel was compiled
with either
.Va INCLUDE_CONFIG_FILE

17
usr.bin/config/main.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: main.c,v 1.47 2012/03/12 02:58:55 dholland Exp $ */
/* $NetBSD: main.c,v 1.48 2012/08/30 12:31:25 christos Exp $ */
/*
* Copyright (c) 1992, 1993
@ -60,6 +60,9 @@ COPYRIGHT("@(#) Copyright (c) 1992, 1993\
#include <sys/stat.h>
#include <sys/param.h>
#include <sys/mman.h>
#ifdef __NetBSD__
#include <sys/sysctl.h>
#endif
#include <paths.h>
#include <ctype.h>
#include <err.h>
@ -230,12 +233,20 @@ main(int argc, char **argv)
errx(EXIT_FAILURE, "-L can only be used with -s and -v");
if (xflag) {
if (argc == 0) {
#ifdef __NetBSD__
conffile = (argc == 1) ? argv[0] : _PATH_UNIX;
char path_unix[MAXPATHLEN];
size_t len = sizeof(path_unix) - 1;
path_unix[0] = '/';
conffile = sysctlbyname("machdep.booted_kernel",
&path_unix[1], &len, NULL, 0) == -1 ? _PATH_UNIX :
path_unix;
#else
if (argc == 0)
errx(EXIT_FAILURE, "no kernel supplied");
#endif
} else
conffile = argv[0];
if (!is_elf(conffile))
errx(EXIT_FAILURE, "%s: not a binary kernel",
conffile);