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#
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# set +o errexit -o noglob is assumed.
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#
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exp_rtl_fileop_check() {
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	local _prefix="${1}" _pname="" _rname=""; shift;
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	while [ "${#}" -gt 0 ]; do
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		return 0;
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	shift; done;
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};
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rtl_fileop() {
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	local _op="${1}" _dst="" _install_args="" _rc=0 _src=""; shift;
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	case "${_op}" in
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	cd)	if [ \( -z "${1}" \) -o ! \( -L "${1}" -o -e "${1}" \) ]; then
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			rtl_log_msg failexit "Invalid or non-existent directory \`${1}'.";
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		elif exp_rtl_fileop_check "${PREFIX}" "${1}"; then
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			rtl_log_msg vvvv "Changing working directory to \`${1}'.";
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			cd -- "${1}"; _rc="${?}";
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		fi; ;;
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	cp_follow)
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		if [ "${#}" -lt 2 ]; then
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			rtl_log_msg failexit "Missing parameters (in: cp_follow ${*}.)";
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		elif exp_rtl_fileop_check "${PREFIX}" "${*}"; then
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			_src="${*}"; _src="${_src% *}";
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			_dst="${*}"; _dst="${_dst##* }";
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			rtl_log_msg vvvv "Copying \`${_src}' into \`${_dst}' w/ -pLR.";
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			cp -pLR -- "${@}"; _rc="${?}";
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		fi; ;;
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	cp)	if [ "${#}" -lt 2 ]; then
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			rtl_log_msg failexit "Missing parameters (in: cp ${*}.)";
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		elif exp_rtl_fileop_check "${PREFIX}" "${*}"; then
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			_src="${*}"; _src="${_src% *}";
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			_dst="${*}"; _dst="${_dst##* }";
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			rtl_log_msg vvvv "Copying \`${_src}' into \`${_dst}' w/ -pPR.";
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			cp -pPR -- "${@}"; _rc="${?}";
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		fi; ;;
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	install)
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		if [ "${#}" -lt 2 ]; then
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			rtl_log_msg failexit "Missing parameters (in: install ${*}.)";
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		else	_dst="$(while [ ""${#}"" -gt 2 ]; do shift; done; echo "${2}")";
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			_install_args="$(while [ ""${#}"" -gt 2 ]; do echo "${1}"; shift; done)";
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			_src="$(while [ ""${#}"" -gt 2 ]; do shift; done; echo "${1}")";
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			if exp_rtl_fileop_check "${PREFIX}" "${_dst}" "${_src}"; then
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				rtl_log_msg vvvv "Installing \`${_src}' into \`${_dst}' w/ ${_install_args}.";
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				install "${@}"; _rc="${?}";
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			fi;
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		fi; ;;
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	ln_symbolic)
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		if [ \( -z "${1}" \) -o \( -z "${2}" \) ]; then
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			rtl_log_msg failexit "Missing parameters (in: ln_symbolic ${*}.)";
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		elif exp_rtl_fileop_check "${PREFIX}" "${2}"; then
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			if rtl_fileop test "${2}"; then
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				rtl_fileop rm "${2}";
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			fi;
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			if [ "${?}" -eq 0 ]; then
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				rtl_log_msg vvvv "Linking \`${1}' to \`${2}' w/ -fs";
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				ln -fs -- "${1}" "${2}"; _rc="${?}";
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			fi;
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		fi; ;;
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	mv)	if [ \( -z "${1}" \) -o \( -z "${2}" \) ]; then
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			rtl_log_msg failexit "Missing parameters (in: mv ${*}.)";
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		elif exp_rtl_fileop_check "${PREFIX}" "${1}" "${2}"; then
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			rtl_log_msg vvvv "Moving \`${1}' to \`${2}' w/ -fs";
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			mv -f -- "${1}" "${2}"; _rc="${?}";
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		fi; ;;
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	mkdir|mkfifo|rm|source_opt|test|touch)
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		while [ \( "${?}" -eq 0 \) -a \( ""${#}"" -gt 0 \) ]; do
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			if [ -z "${1}" ]; then
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				rtl_log_msg failexit "Missing parameters (in: ${_op} ${*}.)";
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			elif [ "${_op}" = mkdir ]\
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			&& [ ! -d "${1}" ]\
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			&& exp_rtl_fileop_check "${PREFIX}" "${1}"; then
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				if rtl_fileop test "${1}"; then
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					rtl_fileop rm "${1}";
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				fi;
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				rtl_log_msg vvvv "Making directory \`${1}'.";
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				mkdir -p -- "${1}"; _rc="${?}";
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			elif [ "${_op}" = mkfifo ]\
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			&& exp_rtl_fileop_check "${PREFIX}" "${1}"; then
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				if rtl_fileop test "${1}"; then
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					rtl_fileop rm "${1}";
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				fi;
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				rtl_log_msg vvvv "Creating FIFO \`${1}'.";
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				exp_rtl_fileop_check "${PREFIX}" "${1}";
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				mkfifo -- "${1}"; _rc="${?}";
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			elif [ "${_op}" = rm ]\
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			&& rtl_fileop test "${1}"\
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			&& exp_rtl_fileop_check "${PREFIX}" "${1}"; then
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				rtl_log_msg vvvv "Removing directory or file \`${1}'.";
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				rm -rf -- "${1}"; _rc="${?}";
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			elif [ "${_op}" = source_opt ]\
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			&& rtl_fileop test "${1}"\
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			&& exp_rtl_fileop_check "${PREFIX}" "${1}"; then
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				rtl_log_msg vvvv "Sourcing file \`${1}'.";
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				. "${1}"; _rc="${?}";
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			elif [ "${_op}" = test ]\
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			&& exp_rtl_fileop_check "${PREFIX}" "${1}"\
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			&& ! [ \( -L "${1}" \) -o \( -e "${1}" \) ]; then
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				return 1;
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			elif [ "${_op}" = touch ]\
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			&& exp_rtl_fileop_check "${PREFIX}" "${1}"; then
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				rtl_log_msg vvvv "Touching file \`${1}'.";
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				touch -- "${1}"; _rc="${?}";
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			fi; shift;
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		done; ;;
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	*)	rtl_log_msg failexit "Error: rtl_fileop() called w/ invalid parameter(s): ${*}"; ;;
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	esac; return "${_rc}";
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};
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# vim:filetype=sh