postinst is in jtex-bin 2.1-2.
This file is a maintainer script. It is executed when installing (*inst) or removing (*rm) the package.
The actual contents of the file can be viewed below.
| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 | #!/bin/sh
# postinst script for jtex-bin
#
# see: dh_installdeb(1)
set -e
umask 022
# summary of how this script can be called:
#        * <postinst> `configure' <most-recently-configured-version>
#        * <old-postinst> `abort-upgrade' <new version>
#        * <conflictor's-postinst> `abort-remove' `in-favour' <package>
#          <new-version>
#        * <deconfigured's-postinst> `abort-deconfigure' `in-favour'
#          <failed-install-package> <version> `removing'
#          <conflicting-package> <version>
# for details, see /usr/doc/packaging-manual/
#
# quoting from the policy:
#     Any necessary prompting should almost always be confined to the
#     post-installation script, and should be protected with a conditional
#     so that unnecessary prompting doesn't happen if a package's
#     installation fails and the `postinst' is called with `abort-upgrade',
#     `abort-remove' or `abort-deconfigure'.
update_texmf()
{
    d=/etc/texmf/texmf.d
    f=${d}/20jtex.cnf
    b=${d}/20jtex.bak
    if [ -f ${d}/20jtex ] ; then
	mv -f ${d}/20jtex ${b}
    elif [ -f ${b} ] ; then
	echo "Preserved \`20jtex.bak' is found and tried."
	mv -f ${b} ${f}
	update-texmf
    fi
    if [ -f ${f} ] ; then
	for x in jtex jlatex amsjtex; do
	    if ( ! kpsewhich --progname=${x} ${x}.ini >/dev/null ) ; then
		echo "Old \`20jtex.cnf' is found and renamed." 1>&2
		mv -f ${f} ${b}
		break
	    fi
	done
    fi
    if ( test -f ${f} && egrep -q '^TEXINPUTS.jlatex209' ${f} ) ; then
	echo "The entry of jlatex209 is removed from ${f}." 1>&2
	cp -fp ${f} ${b}
	perl -pe 's/^(TEXINPUTS\.jlatex209).*\n//' ${b} > ${f}
    fi
    if [ ! -f ${f} ] ; then
	cat <<EOF >${f}
%
% NTT jTeX
%
TEXINPUTS.jtex		= .;\$TEXMF/{jtex,tex}/{plain,generic,}//
TEXINPUTS.jlatex	= .;\$TEXMF/{jtex,tex}/{latex,generic,}//
TEXINPUTS.jlatex2e	= .;\$TEXMF/{jtex,tex}/{latex,generic,}//
TEXINPUTS.amsjtex	= .;\$TEXMF/{jtex,tex}/{amstex,plain,generic,}//
EOF
    fi
    update-texmf
}
update_fmtutil()
{
    d=/etc/texmf/fmt.d
    f=${d}/20jtex.cnf
    b=${d}/20jtex.bak
    if [ -f ${f} ] ; then
	if ( egrep -q '^jlatex209' ${f} ) ; then
	    echo "The entry of jlatex209 is removed from ${f}." 1>&2
	    cp -fp ${f} ${b}
	    perl -pe 's/^jlatex209.*\n//' ${b} > ${f}
	fi
    elif [ -f ${b} ] ; then
	echo "Preserved \`20jtex.bak' is found and recoverd."
	mv -f ${b} ${f}
    else
	cat <<EOF >${f}
#
# NTT jTeX
#
# format	engine		pattern-file	arguments
jtex		jtex	-	jtex.ini
jlatex		jtex	-	jlatex.ini
amsjtex		jtex	-	amsjtex.ini
EOF
    fi
    update-fmtutil
}
make_format()
{
    target=$1
    formats=/var/lib/texmf/web2c/jtex
    if ( fmtutil-sys --byfmt ${target} 1>/dev/null 2>&1 ) ; then
	/usr/share/texmf/web2c/mktexupd ${formats} ${target}.fmt
	echo "  The format file of \`${target}' is built successfully."
    else
	echo "  The format file of \`${target}' is NOT built successfully." 1>&2
	case ${target} in
	    ams*)
		echo "  In order to use \`${target}', \`tetex-extra' package is required." 1>&2
		;;
	    *)
		echo "  Visit \`/var/lib/texmf/web2c/${target}.log' for details." 1>&2
		exit 1
		;;
	esac
    fi
}
make_formats()
{
    mktexlsr
    echo "Make format files of jtex-bin. This may take some time. ..."
    for x in jtex jlatex amsjtex; do
	make_format ${x}
    done
    echo "Done."
}
case "$1" in
    configure)
	update_texmf
	update_fmtutil
	make_formats
	;;
    abort-upgrade|abort-remove|abort-deconfigure)
	;;
    *)
        echo "postinst called with unknown argument \`$1'" >&2
        exit 0
	;;
esac
# dh_installdeb will replace this with shell code automatically
# generated by other debhelper scripts.
exit 0
 |