#!/bin/sh
#
# lintDead -- identify "dead" code, un-called functions in a source tree.
#	Can produce false positives if the use is in another file.
# Output is
# "source/auth/auth.c", line 529: warning: name defined but never used: make_auth_context_fixed in auth.c(529)
#
ProgName=`basename $0`

main() {

	if [ $# -lt 1 ]; then
		say "$ProgName error: you must supply a parameter"
		say "Usage: $0 parameter"
		exit 1
	fi
	find $1 -type f -name '*\.c' -o -name '*\.h' -o -name '*.cpp' |\
	egrep -v 'SCCS|RCS|\.svn' |\
	xargs lint -s  -XCC=yes -Nlevel=2 \
		-erroff=%all,no%E_NAME_DEF_NOT_USED2,no%E_NAME_DEF_NOT_USED |\
	postprocess
}

#
# postprocess -- check with cscope, in the current directory
#
# 1                    2    3    4        5    6       7   8     9     10
#"source/auth/auth.c", line 529: warning: name defined but never used: make_auth_context_fixed in auth.c(529)
#
postprocess() {
	while read one two three four five six seven eight nine ten rest; do
		x=`cscope -d -L -3 $ten`
		if [ "$x" = "" ]; then
			echo "$one $two $three $four $five $six $seven $eight $nine $ten $rest"
		fi
	done
}

say() {
	echo "$@" 1>&2
}

main "$@"