Overhaul locale handling.

Use locale(1) to determine the locale instead of trying to hand roll it.
Correctly construct groff call based on charset and locale independently,
not the mix between the two.

Submitted by:	uqs@

usr.bin/man/man.sh

@@ -312,11 +312,10 @@ man_display_page() {
 	# device flag (-T) we have to pass to eqn(1) and groff(1). Then,
 	# setup the pipeline of commands based on the user's request.
 
-	# Apparently the locale flags are switched on where the manpage is
-	# found not just the locale env variables.
-	nroff_dev="ascii"
-	case "X${use_locale}X${manpage}" in
-	XyesX*/${man_lang}*${man_charset}/*)
+	# If the manpage is from a particular charset, we need to setup nroff
+	# to properly output for the correct device.
+	case "${manpage}" in
+	*.${man_charset}/*)
 		# I don't pretend to know this; I'm just copying from the
 		# previous version of man(1).
 		case "$man_charset" in
@@ -327,9 +326,20 @@ man_display_page() {
 		*)		nroff_dev="ascii" ;;
 		esac
 
-		NROFF="$NROFF -T$nroff_dev -dlocale=$man_lang.$man_charset"
+		NROFF="$NROFF -T$nroff_dev"
 		EQN="$EQN -T$nroff_dev"
 
+		# Iff the manpage is from the locale and not just the charset,
+		# then we need to define the locale string.
+		case "${manpage}" in
+		*/${man_lang}_${man_country}.${man_charset}/*)
+			NROFF="$NROFF -dlocale=$man_lang.$man_charset"
+			;;
+		*/${man_lang}.${man_charset}/*)
+			NROFF="$NROFF -dlocale=$man_lang.$man_charset"
+			;;
+		esac
+
 		# Allow language specific calls to override the default
 		# set of utilities.
 		l=$(echo $man_lang | tr [:lower:] [:upper:])
@@ -557,28 +567,38 @@ man_setup() {
 # Usage: man_setup_locale
 # Setup necessary locale variables.
 man_setup_locale() {
+	local lang_cc
+
+	locpaths='.'
+	man_charset='US-ASCII'
+
 	# Setup locale information.
 	if [ -n "$oflag" ]; then
-		decho "Using non-localized manpages"
-		unset use_locale
-	elif [ -n "$LC_ALL" ]; then
-		parse_locale "$LC_ALL"
-	elif [ -n "$LC_CTYPE" ]; then
-		parse_locale "$LC_CTYPE"
-	elif [ -n "$LANG" ]; then
-		parse_locale "$LANG"
+		decho 'Using non-localized manpages'
+	else
+		# Use the locale tool to give us the proper LC_CTYPE
+		eval $( $LOCALE )
+
+		case "$LC_CTYPE" in
+		C)		;;
+		POSIX)		;;
+		[a-z][a-z]_[A-Z][A-Z]\.*)
+				lang_cc="${LC_CTYPE%.*}"
+				man_lang="${LC_CTYPE%_*}"
+				man_country="${lang_cc#*_}"
+				man_charset="${LC_CTYPE#*.}"
+				locpaths="$LC_CTYPE"
+				locpaths="$locpaths:$man_lang.$man_charset"
+				if [ "$man_lang" != "en" ]; then
+					locpaths="$locpaths:en.$man_charset"
+				fi
+				locpaths="$locpaths:."
+				;;
+		*)		echo 'Unknown locale, assuming C' >&2
+				;;
+		esac
 	fi
 
-	if [ -n "$use_locale" ]; then
-		locpaths="${man_lang}_${man_country}.${man_charset}"
-		locpaths="$locpaths:$man_lang.$man_charset"
-		if [ "$man_lang" != "en" ]; then
-			locpaths="$locpaths:en.$man_charset"
-		fi
-		locpaths="$locpaths:."
-	else
-		locpaths="."
-	fi
 	decho "Using locale paths: $locpaths"
 }
 
@@ -660,28 +680,6 @@ parse_file() {
 	done < "$file"
 }
 
-# Usage: parse_locale localestring
-# Setup locale variables for proper parsing.
-parse_locale() {
-	local lang_cc
-
-	case "$1" in
-	C)				;;
-	POSIX)				;;
-	[a-z][a-z]_[A-Z][A-Z]\.*)	lang_cc="${1%.*}"
-					man_lang="${1%_*}"
-					man_country="${lang_cc#*_}"
-					man_charset="${1#*.}"
-					use_locale=yes
-					return 0
-					;;
-	*)				echo 'Unknown locale, assuming C' >&2
-					;;
-	esac
-
-	unset use_locale
-}
-
 # Usage: search_path
 # Traverse $PATH looking for manpaths.
 search_path() {
@@ -893,6 +891,7 @@ do_whatis() {
 
 EQN=/usr/bin/eqn
 COL=/usr/bin/col
+LOCALE=/usr/bin/locale
 NROFF='/usr/bin/groff -S -Wall -mtty-char -man'
 PIC=/usr/bin/pic
 SYSCTL=/sbin/sysctl