Verify that all input files are readable before (re)generating output file.

1 files changed, 10 insertions, 0 deletions

diff --git a/postfix/mkpostfixconfig.sh b/postfix/mkpostfixconfig.sh
index 682f89b..d5a91ed 100755
--- a/postfix/mkpostfixconfig.sh
+++ b/postfix/mkpostfixconfig.sh
@@ -6,6 +6,16 @@ basedir="/etc/local-REDPILL"
 
 domains="$(cat "$basedir/realms" | sed 's/#.*//')"
 
+exit1() {
+	response="${1:+Error: }${1:-Internal error!}"
+	echo "$response"
+	exit 1
+}
+
+for domain in $domains; do
+	[ -r "$basedir/$domain/mailnetworks" ] || exit1 "Could not read input file $basedir/$domain/mailnetworks"
+done
+
 echo '' > "$basedir/postfix/permit_mx_backup_networks"
 for domain in $domains; do
 	cat "$basedir/$domain/mailnetworks" >> "$basedir/postfix/permit_mx_backup_networks"