NetBSD/etc/MAKEDEV.awk

233 lines
6.9 KiB
Awk

#!/usr/bin/awk -
#
# $NetBSD: MAKEDEV.awk,v 1.7 2003/10/24 19:57:36 jdolecek Exp $
#
# Copyright (c) 2003 The NetBSD Foundation, Inc.
# All rights reserved.
#
# This code is derived from software contributed to The NetBSD Foundation
# by Jaromir Dolecek.
#
# 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 NetBSD
# Foundation, Inc. and its contributors.
# 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
#
# Script to generate platform MAKEDEV script from MI template, MD
# MAKEDEV.conf and MD/MI major lists
#
# Uses environment variables MACHINE/MACHINE_ARCH to select
# appropriate files, and NETBSDSRCDIR to get root of source tree.
BEGIN {
# top of source tree, used to find major number list in kernel
# sources
top = ETCDIR "/../sys/"
if (system("test -d '" top "'") != 0) {
print "ERROR: can't find top of kernel source tree ('" top "' not a directory)" > "/dev/stderr"
exit 1
}
machine = ENVIRON["MACHINE"]
maarch = ENVIRON["MACHINE_ARCH"]
if (!machine || !maarch) {
print "ERROR: 'MACHINE' and 'MACHINE_ARCH' must be set in environment" > "/dev/stderr"
exit 1
}
# file with major definitions
majors[0] = "conf/majors"
if (maarch == "arm" && system("test -f '" top "arch/" machine "/conf/majors." machine "'") != 0)
majors[1] = "arch/arm/conf/majors.arm32";
else if (machine == "evbsh5") {
majors[1] = "arch/evbsh5/conf/majors.evbsh5";
majors[2] = "arch/sh5/conf/majors.sh5";
} else if (machine == "sbmips")
majors[1] = "arch/evbmips/conf/majors.evbmips";
else
majors[1] = "arch/" machine "/conf/majors." machine;
# process all files with majors and fill the chr[] and blk[]
# arrays, used in template processing
for (m in majors) {
file = top majors[m]
if (system("test -f '" file "'") != 0) {
print "ERROR: can't find majors file '" file "'" > "/dev/stderr"
exit 1
}
while (getline < file) {
if ($1 == "device-major") {
if ($3 == "char") {
chr[$2] = $4
if ($5 == "block")
blk[$2] = $6
} else if ($3 == "block")
blk[$2] = $4
}
}
close(file)
}
# read MD config file for MD device targets
cfgfile = ETCDIR "/etc." machine "/MAKEDEV.conf"
if (system("test -f '" cfgfile "'") != 0) {
print "ERROR: no platform MAKEDEV.conf - '" cfgfile "' doesn't exist" > "/dev/stderr"
exit 1
}
# skip first two lines - RCS Id and blank line
getline < cfgfile
getline < cfgfile
MDDEV = 0 # MD device targets
while (getline < cfgfile) {
if (MDDEV)
MDDEV = MDDEV "\n" $0
else
MDDEV = $0
}
close(cfgfile)
# determine number of partitions used by platform
# there are three variants in tree:
# 1. MAXPARTITIONS = 8
# 2. MAXPARTITIONS = 16 with no back compat mapping
# 3. MAXPARTITIONS = 16 with back compat with old limit of 8
# currently all archs, which moved from 8->16 use same
# scheme for mapping disk minors, high minor offset
# if this changes, the below needs to be adjusted and
# additional makedisk_p16foo needs to be added
incdir = machine
diskpartitions = 0
diskbackcompat = 0
while (1) {
inc = top "arch/" incdir "/include/disklabel.h"
if (system("test -f '" inc "'") != 0) {
print "ERROR: can't find kernel include file '" inc "'" > "/dev/stderr"
exit 1
}
incdir = 0
while (getline < inc) {
if ($1 == "#define" && $2 == "MAXPARTITIONS")
diskpartitions = $3
else if ($1 == "#define" && $2 == "OLDMAXPARTITIONS")
diskbackcompat = $3
else if ($1 == "#define" && $2 == "RAW_PART")
RAWDISK_OFF = $3
else if ($1 == "#include" && $2 ~ "<.*/disklabel.h>") {
# wrapper, switch to the right file
incdir = substr($2, 2)
sub("/.*", "", incdir)
break;
}
}
if (diskpartitions)
break;
if (!incdir) {
print "ERROR: can't determine MAXPARTITIONS from include file '" inc "'" > "/dev/stderr"
exit 1
}
}
MKDISK = "makedisk_p" diskpartitions # routine to create disk devs
DISKMINOROFFSET = diskpartitions
if (diskbackcompat) {
MKDISK = MKDISK "high"
DISKMINOROFFSET = diskbackcompat
}
RAWDISK_NAME = sprintf("%c", 97 + RAWDISK_OFF) # a+offset
# initially no substitutions
devsubst = 0
deventry = ""
}
/%MI_DEVICES_BEGIN%/ {
devsubst = 1;
next
}
/%MI_DEVICES_END%/ {
devsubst = 0;
next
}
# filter the two unneeded makedisk_p* routines, leave only
# the one used
/^makedisk_p8\(\) {/, /^}/ {
if (MKDISK != "makedisk_p8")
next;
}
/^makedisk_p16\(\) {/, /^}/ {
if (MKDISK != "makedisk_p16")
next;
}
/^makedisk_p16high\(\) {/, /^}/ {
if (MKDISK != "makedisk_p16high")
next;
}
# special cases aside, handle normal line
{
sub("^%MD_DEVICES%", MDDEV)
sub("%MKDISK%", MKDISK)
sub("%DISKMINOROFFSET%", DISKMINOROFFSET)
sub("%RAWDISK_OFF%", RAWDISK_OFF)
sub("%RAWDISK_NAME%", RAWDISK_NAME)
# if device substitutions are not active, do nothing more
if (!devsubst) {
print
next
}
}
# first line of device entry
/^[a-z].*\)$/ {
if (length(deventry) > 0) {
# We have a previous entry to print. Replace all known
# character and block devices. If no unknown character
# or block device definition remains within the entry,
# print it to output, otherwise scrap it.
for (c in chr)
gsub("%" c "_chr%", chr[c], deventry)
for (b in blk)
gsub("%" b "_blk%", blk[b], deventry)
if (deventry !~ "%[a-z]*_chr%" && deventry !~ "%[a-z]*_blk%")
print deventry
}
deventry = $0
next
}
# template line within device substitution section - just keep appending
# to the current entry
{
deventry = deventry "\n" $0
}