tools: checkman.sh portability

checkman.sh fails if 'git' or 'lib' are
anywhere in the tested file's path:
   Change to using relative paths.
   Improve the 'find' command call.

checkman.sh depends upon the man-db package:
   Remove all instants of the man command and
   use troff directly to improve portability.

Signed-off-by: J William Piggott <elseifthen@gmx.com>

tools/checkmans.sh

@@ -39,10 +39,6 @@ while getopts vVh OPTIONS; do
 	esac
 done
 
-ERROR_FILE=$(mktemp ${SCRIPT_INVOCATION_SHORT_NAME}.XXXXXXXXXX)
-# remove tmp file at exit
-trap "rm -f ${ERROR_FILE}" 0
-
 # Try to find missing manuals matching build targets with manual files.
 declare -A MAN_LIST BIN_LIST
 
@@ -68,9 +64,10 @@ remove_repeats()
 	set -u
 }
 
+cd $(git rev-parse --show-toplevel)
+
 for I in $(
-	find $(git rev-parse --show-toplevel) -name '*.[1-8]' |
-	egrep -v '(Documentation|.git|/.libs/|autom4te.cache)'
+	find -path './autom4te.cache' -prune -o -name '*[[:alpha:]].[1-8]' -print
 ); do
 	MAN_FILE=${I##*/}
 	MAN_LIST[${MAN_FILE%%.[0-9]}]=1
@@ -78,7 +75,7 @@ for I in $(
 		# Some manuals, such as x86_64, call inclusion and they
 		# should not be tested any further.
 		if ${VERBOSE}; then
-			printf "skipping: ${I##*util-linux/}: includes "
+			printf "skipping: ${I}: includes "
 			awk '{print $2}' ${I}
 		fi
 		continue
@@ -87,16 +84,17 @@ for I in $(
 	if ${VERBOSE}; then
 		echo "testing: ${I}"
 	fi
-	MANWIDTH=80 man --warnings=all ${I} >/dev/null 2>| ${ERROR_FILE}
-	if [ -s ${ERROR_FILE} ]; then
-		echo "error: run: man --warnings=all ${I##*util-linux/} >/dev/null" >&2
-		I_ERR=1
+	RET=1
+	cat ${I} | troff -mandoc -ww -z |& grep "<" && RET=$?
+	if [ $RET = 0 ]; then
+	echo "From: cat ${I} | troff -mandoc -ww -z"
+	echo "=================================================="
 	fi
 	if ! lexgrog ${I} >/dev/null; then
-		echo "error: run: lexgrog ${I##*util-linux/}" >&2
+		echo "error: run: lexgrog ${I}" >&2
 		I_ERR=1
 	fi
-	REPEATS=( $(MANWIDTH=2000 man -l ${I} |
+	REPEATS=( $(cat ${I} | troff -mandoc -ww -Tascii | grotty |
 		col -b |
 		sed  -e 's/\s\+/\n/g; /^$/d' |
 		awk 'BEGIN { p="" } { if (0 < length($0)) { if (p == $0) { print } } p = $0 }') )
@@ -109,7 +107,7 @@ for I in $(
 			let ITER=${ITER}-1 || true
 		done
 		if [ 0 -lt "${#REPEATS[@]}" ]; then
-			echo "warning: ${I##*util-linux/} has repeating words: ${REPEATS[@]}"
+			echo "warning: ${I} has repeating words: ${REPEATS[@]}"
 		fi
 	fi
 	# The 'let' may cause exit on error.