scripts/bash_aliases: man_lsfunc(), man_lsvar(): Use mansect(1)

index e461707c8..25425c389 100644
@@ -38,39 +38,6 @@ sed_rm_ccomments()
 ########################################################################
 #	Linux man-pages
 
-#  man_section()  prints specific manual page sections (DESCRIPTION, SYNOPSIS,
-# ...) of all manual pages in a directory (or in a single manual page file).
-# Usage example:  .../man-pages$ man_section man2 SYNOPSIS 'SEE ALSO';
-
-man_section()
-{
-	if [ $# -lt 2 ]; then
-		>&2 echo "Usage: ${FUNCNAME[0]} <dir> <section>...";
-		return $EX_USAGE;
-	fi
-
-	local page="$1";
-	shift;
-	local sect="$*";
-
-	find "$page" -type f \
-	|xargs wc -l \
-	|grep -v -e '\b1 ' -e '\btotal\b' \
-	|awk '{ print $2 }' \
-	|sort \
-	|while read -r manpage; do
-		(sed -n '/^\.TH/,/^\.SH/{/^\.SH/!p}' <"$manpage";
-		 for s in $sect; do
-			<"$manpage" \
-			sed -n \
-				-e "/^\.SH $s/p" \
-				-e "/^\.SH $s/,/^\.SH/{/^\.SH/!p}";
-		 done;) \
-		|mandoc -Tutf8 2>/dev/null \
-		|col -pbx;
-	done;
-}
-
 #  man_lsfunc()  prints the name of all C functions declared in the SYNOPSIS
 # of all manual pages in a directory (or in a single manual page file).
 # Each name is printed in a separate line

@@ -83,9 +50,9 @@ man_lsfunc()
 		return $EX_USAGE;
 	fi
 
-	for arg in "$@"; do
-		man_section "$arg" 'SYNOPSIS';
-	done \
+	mansect 'SYNOPSIS' "$@" \
+	|mandoc -Tutf8 2>/dev/null \
+	|col -pbx \
 	|sed_rm_ccomments \
 	|pcregrep -Mn '(?s)^ [\w ]+ \**\w+\([\w\s(,)[\]*]*?(...)?\s*\); *$' \
 	|grep '^[0-9]' \

@@ -106,9 +73,9 @@ man_lsvar()
 		return $EX_USAGE;
 	fi
 
-	for arg in "$@"; do
-		man_section "$arg" 'SYNOPSIS';
-	done \
+	mansect 'SYNOPSIS' "$@" \
+	|mandoc -Tutf8 2>/dev/null \
+	|col -pbx \
 	|sed_rm_ccomments \
 	|pcregrep -Mv '(?s)^ [\w ]+ \**\w+\([\w\s(,)[\]*]+?(...)?\s*\); *$' \
 	|pcregrep -Mn \

index 25425c389..98b466410 100644
@@ -54,7 +54,7 @@ man_lsfunc()
 	|mandoc -Tutf8 2>/dev/null \
 	|col -pbx \
 	|sed_rm_ccomments \
-	|pcregrep -Mn '(?s)^ [\w ]+ \**\w+\([\w\s(,)[\]*]*?(...)?\s*\); *$' \
+	|pcre2grep -Mn '(?s)^ [\w ]+ \**\w+\([\w\s(,)[\]*]*?(...)?\s*\); *$' \
 	|grep '^[0-9]' \
 	|sed -E 's/syscall\(SYS_(\w*),?/\1(/' \
 	|sed -E 's/^[^(]+ \**(\w+)\(.*/\1/' \

@@ -77,8 +77,8 @@ man_lsvar()
 	|mandoc -Tutf8 2>/dev/null \
 	|col -pbx \
 	|sed_rm_ccomments \
-	|pcregrep -Mv '(?s)^ [\w ]+ \**\w+\([\w\s(,)[\]*]+?(...)?\s*\); *$' \
-	|pcregrep -Mn \
+	|pcre2grep -Mv '(?s)^ [\w ]+ \**\w+\([\w\s(,)[\]*]+?(...)?\s*\); *$' \
+	|pcre2grep -Mn \
 	  -e '(?s)^ +extern [\w ]+ \**\(\*+[\w ]+\)\([\w\s(,)[\]*]+?\s*\); *$' \
 	  -e '^ +extern [\w ]+ \**[\w ]+; *$' \
 	|grep '^[0-9]' \

index a13a6b534..e1e83a8d8 100755
@@ -14,13 +14,14 @@ shift;
 
 
 if test $# -lt 1; then
-	cat;
+	preconv;
 else
 	find -L "$@" -not -type d \
 	| xargs grep -l '^\.TH ' \
-	| xargs cat;
+	| xargs preconv;
 fi \
 | sed -En \
+	-e '/^\.lf 1 /p' \
 	-e '/^\.TH /p' \
 	-e '/^\.SH '"$s"'$/p' \
 	-e '/^\.SH '"$s"'$/,/^\.(TH|SH)/{/^\.(TH|SH)/!p}';