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#!/bin/sh
# $LynxId: install-cfg.sh,v 1.5 2021/01/07 00:31:20 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' INT QUIT TERM HUP
rm -f $OLD $NEW $TST $TMP
# avoid propagating obsolete URLs into new installs
{
echo lynx.isc.org;
echo lynx.browser.org;
echo www.trill-home.com;
echo www.cc.ukans.edu;
echo www.ukans.edu;
echo www.slcc.edu;
echo sol.slcc.edu;
}>$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.
${EGREP-egrep} '^[ ]*[A-Za-z]' "$SRC" |sed -e 's/^[ ]*HELPFILE:.*/HELPFILE:/' >>$TMP
${EGREP-egrep} '^[ ]*[A-Za-z]' "$SRC" |${FGREP-fgrep} -v -f $TMP >$OLD
${EGREP-egrep} '^[ ]*[A-Za-z]' "$DST" |${FGREP-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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