From e58399f3488e32457cf0d385d91cfe0d06ad06ee Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Lucio=20Andr=C3=A9s=20Illanes=20Albornoz?=
 <lucio@lucioillanes.de>
Date: Tue, 24 Mar 2020 11:38:46 +0000
Subject: subr/{ex_pkg_env,pkg_install,rtl_list}.subr: reference ${IFS} w/
 explicit default value (via midipix.)

---
 subr/ex_pkg_env.subr  | 2 +-
 subr/pkg_install.subr | 2 +-
 subr/rtl_list.subr    | 8 ++++----
 3 files changed, 6 insertions(+), 6 deletions(-)

diff --git a/subr/ex_pkg_env.subr b/subr/ex_pkg_env.subr
index ca701296..8cd58f74 100644
--- a/subr/ex_pkg_env.subr
+++ b/subr/ex_pkg_env.subr
@@ -73,7 +73,7 @@ exp_pkg_env_set() {
 				"$(rtl_toupper "PKG_${_pkg_name}")")";
 		fi;
 	done;
-	IFS0="${IFS}"; IFS=":"; for _vname in ${PKG_ENV_VARS_EXTRA:-}; do
+	IFS0="${IFS:- }"; IFS=":"; for _vname in ${PKG_ENV_VARS_EXTRA:-}; do
 		export "${_vname}";
 	done; IFS="${IFS0}";
 	if [ "${_nounset:-0}" -eq 0 ]; then
diff --git a/subr/pkg_install.subr b/subr/pkg_install.subr
index ef3fed28..1f9f1d9d 100644
--- a/subr/pkg_install.subr
+++ b/subr/pkg_install.subr
@@ -3,7 +3,7 @@
 #
 
 pkg_install() {
-	local _fname="" _ifs_old="${IFS}" _pkglist_name="" IFS;
+	local _fname="" _ifs_old="${IFS:- }" _pkglist_name="" IFS;
 	if ! rtl_fileop mkdir "${PKG_PREFIX}"; then
 		return 1;
 	else	IFS="
diff --git a/subr/rtl_list.subr b/subr/rtl_list.subr
index c4c563bf..515681bc 100644
--- a/subr/rtl_list.subr
+++ b/subr/rtl_list.subr
@@ -3,7 +3,7 @@
 #
 
 rtl_lconcat() {
-	local _list="${1}" _litem_new="${2}" _sep="${3:- }" IFS="${3:-${IFS}}";
+	local _list="${1}" _litem_new="${2}" _sep="${3:- }" IFS="${3:-${IFS:- }}";
 	if [ -n "${_list}" ]; then
 		printf "%s%s%s" "${_list}" "${_sep}" "${_litem_new}";
 	else
@@ -12,7 +12,7 @@ rtl_lconcat() {
 };
 
 rtl_lfilter() {
-	local	_list="${1}" _filter="${2}" _sep="${3:- }" IFS="${3:-${IFS}}"	\
+	local	_list="${1}" _filter="${2}" _sep="${3:- }" IFS="${3:-${IFS:- }}"\
 		_filterfl="" _litem="" _litem_filter="" _lnew="";
 	if [ -z "${_filter}" ]; then
 		printf "%s" "${_list}"; return 0;
@@ -31,7 +31,7 @@ rtl_lfilter() {
 };
 
 rtl_llength() {
-	local _list="${1}" _sep="${2:- }" IFS="${2:-${IFS}}" _litem="" _llength=0;
+	local _list="${1}" _sep="${2:- }" IFS="${2:-${IFS:- }}" _litem="" _llength=0;
 	for _litem in ${_list}; do
 		: $((_llength+=1));
 	done;
@@ -60,7 +60,7 @@ rtl_lmax() {
 };
 
 rtl_lsearch() {
-	local	_list="${1}" _filter="${2}" _sep="${3:- }" IFS="${3:-${IFS}}"	\
+	local	_list="${1}" _filter="${2}" _sep="${3:- }" IFS="${3:-${IFS:- }}"\
 		_litem="" _litem_filter="" _lnew="";
 	if [ -z "${_filter}" ]; then
 		printf "%s" "${_list}"; return 0;
-- 
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