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#!/bin/sh
# $LynxId: install-cfg.sh,v 1.4 2018/03/21 16:20:42 tom Exp $
# install lynx.cfg, ensuring the old config-file is saved to a unique file,
# and prepending customizations to the newly-installed file.
#
# $1 = install program
# $2 = file to install
# $3 = where to install it
PRG="$1"
SRC=$2
DST=$3
LANG=C; export LANG
LC_ALL=C; export LC_ALL
LC_CTYPE=C; export LC_CTYPE
LANGUAGE=C; export LANGUAGE
if test -f "$DST" ; then
echo "** checking if you have customized $DST"
OLD=lynx-cfg.old
NEW=lynx-cfg.new
TST=lynx-cfg.tst
TMP=lynx-cfg.tmp
trap "rm -f $OLD $NEW $TST $TMP; exit 9" 1 2 5 15
rm -f $OLD $NEW $TST $TMP
# avoid propagating obsolete URLs into new installs
echo lynx.isc.org >$TMP
echo lynx.browser.org >$TMP
echo www.trill-home.com >>$TMP
echo www.cc.ukans.edu >>$TMP
echo www.ukans.edu >>$TMP
echo www.slcc.edu >>$TMP
echo sol.slcc.edu >>$TMP
# Make a list of the settings which are in the original lynx.cfg
# Do not keep the user's HELPFILE setting since we modify that in
# a different makefile rule.
egrep '^[ ]*[A-Za-z]' $SRC |sed -e 's/^[ ]*HELPFILE:.*/HELPFILE:/' >>$TMP
egrep '^[ ]*[A-Za-z]' $SRC |fgrep -v -f $TMP >$OLD
egrep '^[ ]*[A-Za-z]' $DST |fgrep -v -f $TMP >$TST
if test -s $TST ; then
cat >$TMP <<EOF
## The following lines were saved from your previous configuration.
EOF
cat $TST >>$TMP
cat $SRC >$NEW
cat $TMP >>$NEW
# See if we have saved this information before (ignoring the
# HELPFILE line).
if cmp -s $NEW $OLD
then
echo "... installed $DST would not be changed"
else
NUM=1
while test -f ${DST}-${NUM}
do
if cmp -s $NEW ${DST}-${NUM}
then
break
fi
NUM=`expr $NUM + 1`
done
if test ! -f ${DST}-${NUM}
then
echo "... saving old config as ${DST}-${NUM}"
mv $DST ${DST}-${NUM} || exit 1
fi
echo "** installing $NEW as $DST"
eval $PRG $NEW $DST || exit 1
fi
else
echo "... no customizations found"
echo "** installing $SRC as $DST"
eval $PRG $SRC $DST || exit 1
fi
rm -f $SKIP $OLD $NEW $TST $TMP
elif cmp -s $SRC $DST
then
echo "... installed $DST would not be changed"
else
echo "** installing $SRC as $DST"
eval $PRG $SRC $DST || exit 1
fi
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