#!/bin/sh
# $XTermId: koi8rxterm,v 1.3 2007/12/30 16:33:06 tom Exp $
# This is a wrapper script to set up xterm with a KOI8-R locale; based on
# uxterm.

whoami=koi8rxterm

: ${XTERM_PROGRAM=xterm}

# Check if there is a workable locale program.  If there is not, we will read
# something via the standard error.  Ignore whatever is written to the
# standard output.
locale=`sh -c "LC_ALL=C LC_CTYPE=C LANG=C locale >/dev/null" 2>&1`
found=no

# Check for -version and -help options, to provide a simple return without
# requiring the program to create a window:
if test $# = 1
then
	case $1 in
	-v|-ver*|-h|-he*)
		$XTERM_PROGRAM "$@"
		exit $?
		;;
	esac
fi

# Check environment variables that xterm does, in the same order:
for name in LC_ALL LC_CTYPE LANG
do
	eval 'value=$'$name
	if test -n "$value" ; then
		case $value in
		*.koi8r|*.KOI8R|*.koi8-r|*.KOI8-R)
			found=yes
			;;
		*.koi8r@*|*.KOI8R@*|*.koi8-r@*|*.KOI8-R*)
			found=yes
			;;
		*)
			# The user may not have configured his or her
			# locale; try to muddle through anyway.
			value=ru_RU.KOI8-R
			;;
		esac
		break
	fi
done

# If we didn't find one that uses KOI8-R, modify the safest one.  Not everyone
# has a KOI8-R locale installed (and there appears to be no trivial/portable
# way to determine whether it is, from a shell script).  We could check if the
# user's shell does not reset unknown locale specifiers, but not all shells do.
if test $found != yes ; then
	if test -n "$value" ; then
		value=`echo ${value} |sed -e 's/[.@].*//'`.KOI8-R
	else
		name="LC_CTYPE"
		value="ru_RU.KOI8-R"
	fi
	eval save=\$${name}
	eval ${name}=${value}
	eval export ${name}
	if test -z "$locale" ; then
		# The 'locale' program tries to do a sanity check.
		check=`sh -c "locale >/dev/null" 2>&1`
		if test -n "$check" ; then
			eval ${name}=${save}
			eval export ${name}

			echo "$whoami tried to use locale $value by setting \$$name" >&2
			xmessage -file - <<EOF
$whoami tried unsuccessfully to use locale $value
by setting \$$name to "${value}".
EOF
			exit 1
		fi
	fi
fi

# for testing:
#test -f ./xterm && XTERM_PROGRAM=./xterm

exec $XTERM_PROGRAM -class KOI8RXTerm -title $whoami -k8 "$@"