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#!/bin/sh
#
# CDDL HEADER START
#
# The contents of this file are subject to the terms of the
# Common Development and Distribution License, Version 1.0 only
# (the "License"). You may not use this file except in compliance
# with the License.
#
# You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
# or http://www.opensolaris.org/os/licensing.
# See the License for the specific language governing permissions
# and limitations under the License.
#
# When distributing Covered Code, include this CDDL HEADER in each
# file and include the License file at usr/src/OPENSOLARIS.LICENSE.
# If applicable, add the following below this CDDL HEADER, with the
# fields enclosed by brackets "[]" replaced with your own identifying
# information: Portions Copyright [yyyy] [name of copyright owner]
#
# CDDL HEADER END
#
#
# Copyright (c) 1991 by Sun Microsystems, Inc.
#
#ident "%Z%%M% %I% %E% SMI"
#
PATH=/sbin:/usr/sbin:/usr/bin:/etc
export PATH
RULEBASE=/usr/ucblib/ucblinks.awk
# Name of device-type list produced by "devlinks"
DEVTYPES=/etc/.obp_devices
USAGE="Usage: `basename $0` [-r rootdir] [-e rulebase] [-d]"
DOIT_CMD="sh -s"
while getopts 'de:r:' flag
do
case $flag in
d) DOIT_CMD="cat -"
;;
e)
RULEBASE=$OPTARG;
case "$RULEBASE" in
/*) ;;
*) RULEBASE="`pwd`/$RULEBASE";;
esac
;;
r) ROOTDIR=$OPTARG;
;;
\?) echo "$USAGE" >&2
exit 2;
;;
esac
done
shift `expr $OPTIND - 1`
#
# The rest of this script looks a mess. But in fact underneath all the
# 'sed's and 'awk's it is quite simple.
#
# First it creates a list of all the device nodes in the /devices directory
# (by cd'ing to /dev, then doing a 'find' of all special files in ../devices
# doing an 'ls -l' of these files, and sedding the output to produce a list
# of the form 'major minor type name').
#
# As an added wrinkle it changes 'major' from a number to a driver-name using
# sed rules produced from the "/etc/name_to_major file.
#
# Then it runs the awk rules in the rule-base on this list to produce a list
# of compatability-links that must be created. However, this does not produce
# the links themselves because of the next stage:
#
# Finally this list of compatability-links is inspected and where possible links
# to the SunOS5 names are created instead of links directly to the /devices
# directory
# (by 'find'ing all the symbolic links under /dev, ancomparing the
# subdirectory they occur in, and the file to which they point, to
# the comaptability-link information built above. If a match is found
# a command to make a link to the 5.0 link, rather than to the /devices
# entry, is created. If not, a direct link is created)
# And then the list of link command is executed by a shell, or printed on stdout
# (in debugging mode)
#
# See -- not so complicated! However the syntax of all these rules makes
# the code below nearly incomprehensible. Fear not; the only part you need
# to change for extra devices is located in the 'RULEBASE' file.
cd $ROOTDIR/dev
GENSED=/tmp/mkcompat.sed$$
GENAWK=/tmp/mkcompat.awk$$
GENRULE=/tmp/mkcompat.rule$$
rm -f $GENSED $GENAWK $GENRULE
trap "rm -f $GENSED $GENAWK $GENRULE" 0
#
# First generate full rulebase. This is done to keep common functions
# out of the rulebase
cat - >$GENRULE <<\!EOD
function out(dev, dir, extraname) {
c = split(dir, junk, "/") - 1;
if (junk[1] == ".")
c--;
fulldevfs = "";
while ( c > 0) {
fulldevfs = "../" fulldevfs;
c--;
}
fulldevfs = fulldevfs $4;
printf "devname[\"" fulldevfs "\"] = \"" dev "\";";
if (length(dir) > 0)
printf " devdir[\"" fulldevfs "\"] = \"" dir "\";";
if (length(extraname) > 0)
printf " devextra[\"" fulldevfs "\"] = \"" extraname "\";";
printf "\n";
}
!EOD
#
# Now see if we need to do CD drive special handling. The SCSI CD and disk
# drivers have been merged in SunOS5, so we cannot do the normal differentiation
# on major number with these devices. However the "disks" program does write
# a list of all OBP cd device names in a pecial file; by massaging this file
# we are able to construct rules which correctly differentiate between sd and sr
# devices.
if [ -s $DEVTYPES ]
then
echo "BEGIN {" >>$GENRULE
sed -ne '/^ddi_block:cdrom[: ]/s-^[^ ]*[ ]\{1,\}\(.*\)$- cddev["../devices/\1"] = 1;-p' <$DEVTYPES >>$GENRULE
echo " }" >>$GENRULE
fi
cat $RULEBASE >>$GENRULE
#
#----------------------------------------------------------------------
#
# Construct sedscr ... a script to massage the output of an 'ls -l'
# of all the special files in the '../devices' directory.
#
# First 3 lines of scr change line to format "maj min [b|c] name
#
cat <<\!EOD >$GENSED
1,$s/^\(.\).*[ ]\([0-9][0-9]*\), *\([0-9][0-9]*\)[ ].*[ ]\([^ ][^ ]*\)$/\2 \3 \1 \4/
/:[^ ,][^ ,]*$/s/^\(.*\):\([^ ,]*\)$/\1:\2 \2/
/:[^ ,][^ ,]*,[^ ]*$/s/^\(.*\):\([^ ,]*\),\([^ ]*\)$/\1:\2,\3 \2/
!EOD
# Next lines are generated from the "/etc/name_to_major file; they change the
# "major number" field into its corresponding 'name'. This is so that
# the difference in major-numbers among different machines can be hidden.
#
grep -v '^#' /etc/name_to_major | sed -e '1,$s-^\([^ ]*\)[ ][ ]*\([^ ][^ ]*\)$-/^\2 /s/^\2 /\1 /-' >>$GENSED
#
#----------------------------------------------------------------------
#
# Have finished generating sedscr. Now we generate 'nawkscr'; first we insert
# the header ...
cat >$GENAWK <<\!EOD
BEGIN {
!EOD
# and then we find all the symbolic-links under /dev, massage the output of
# an 'ls -l' with the sed script we generated above, and then 'nawk' the output
# using the actual link data table script. This generates the heart of our
# link-creating 'nawk' script.
echo "Scanning /devices/ directory tree..." >&2
ls -l `find ../devices \( -type b -o -type c \) -print` | sed -f $GENSED |\
sort -b +0 -1 +1n -2 +4 -5 | nawk -f $GENRULE >>$GENAWK
cat >>$GENAWK <<\!EOD
}
$2 in devname {
if (length(devdir[$2]) <= 0)
next;
if (devdir[$2] == "./") {
if ($1 == devname[$2])
next;
}
else if (match($1, "^" devdir[$2] "[^/]*$") == 0)
next;
printf "rm -f %s; ln -s %s %s\n", devname[$2], $1, devname[$2];
if (length(devextra[$2]) > 0) {
printf "rm -f %s; ln -s %s %s\n", devextra[$2],
devname[$2], devextra[$2];
delete devextra[$2];
}
delete devname[$2];
delete devdir[$2];
}
END {
for (dev in devname) {
printf "rm -f %s; ln -s %s %s\n", devname[dev],
substr(dev, match(dev, "\.\./devices/"), 999),
devname[dev];
if (length(devextra[dev]) > 0)
printf "rm -f %s; ln -s %s %s\n", devextra[dev],
devname[dev], devextra[dev];
}
}
!EOD
#
#----------------------------------------------------------------------
#
echo "Scanning /dev/ directory tree..." >&2
ls -l `find . -type l -print` |\
sed -e '1,$s/^.* \.\/\([^ ][^ ]*\) -> \([^ ][^ ]*\)$/\1 \2/' |\
nawk -f $GENAWK |\
$DOIT_CMD
|
