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	#!/bin/bash

	set -e

	# Set variables
	# in - input man page (something_foo.3.in)
	# out - output file (something_foo.3)
	# common - common ipc error file

	in="$1"
	out="$2"
	common="$3"

	# make sure to trap on error and ctrl+c
	# so we can cleanup our temporary files
	# and provide error back to Makefile
	cleanup() {
	rm -f "$out"-t "$out"
	}

	trap "cleanup" ABRT
	trap "cleanup" QUIT
	trap "cleanup" TERM
	trap "cleanup" INT
	trap "cleanup" ERR

	# Determine build date in man page format YYYY-MM-DD
	date="$(LC_ALL=C date "+%F")"

	# do the hack.. it looks ugly but it works fine

	# remove temporary file
	rm -f "$out"-t

	# insert the $common ipc error file in the man page
	if grep -q @COMMONIPCERRORS@ "$in"; then
	awk "{print}(\$1 ~ /@COMMONIPCERRORS@/){exit 0}" "$in" > "$out"-t
	cat "$common" >> "$out"-t
	awk -v p=0 "(\$1 ~ /@COMMONIPCERRORS@/){p = 1} {if(p==1)print}" "$in" >> "$out"-t
	else
	cp "$in" "$out"-t
	fi

	# substitute BUILDDATE with precalculated date
	# and remove COMMONIPCERRORS tag from above
	sed -i \
	-e 's#@BUILDDATE@#'$date'#g' \
	-e 's#@COMMONIPCERRORS@##g' \
	"$out"-t

	# move in place as requested
	mv "$out"-t "$out"