functions: implement a environment file parser

This adds a 'parse_envfile' function that reads files such as
/etc/locale.conf and /etc/vconsole.conf without sourcing them as bash
logic. Several benefits are realized from this:

- Impossible to execute arbitrary code
- Bad syntax won't prevent the entire file from being read
- Possible to limit what variables are allowed

Signed-off-by: Dave Reisner <dreisner@archlinux.org>

1 files changed, 2 insertions, 2 deletions

diff --git a/rc.sysinit b/rc.sysinit
index eb66935..654a409 100755
--- a/rc.sysinit
+++ b/rc.sysinit
@@ -237,7 +237,7 @@ if [[ $HOSTNAME ]]; then
 fi
 
 if [[ -s /etc/locale.conf ]]; then
-	. /etc/locale.conf
+	parse_envfile /etc/locale.conf "LANG"
 	[[ $LANG ]] && LOCALE=$LANG
 fi
 if [[ ${LOCALE,,} =~ utf ]]; then
@@ -263,7 +263,7 @@ else
 fi
 
 if [[ -s /etc/vconsole.conf ]]; then
-	. /etc/vconsole.conf
+	parse_envfile /etc/vconsole.conf "${vconsolevars[@]}"
 	[[ $FONT ]] && CONSOLEFONT=$FONT
 	[[ $FONT_MAP ]] && CONSOLEMAP=$FONT_MAP
 fi