Fix SC2162

wayblue-fix-89.sh

@@ -24,8 +24,7 @@
 # that the cause is this disparity and that it will be smoothed out when
 # systemd-sysusers next runs
 #
-set -e
-set -o pipefail
+set -euo pipefail
 
 # Iterate over each file we're interested in
 for file in /etc/shadow /etc/gshadow; do
@@ -42,7 +41,7 @@ for file in /etc/shadow /etc/gshadow; do
 	# Prelim checks succeeded, move forward
 	echo "Parsing $file for junk"
 	# Read each line in the file to iterate over it
-	while read line; do
+	while read -r line; do
 		# This should never happen, but if for some reason we get an empty line,
 		# continue
 		[ -z "$line" ] && continue
@@ -111,5 +110,7 @@ for file in /etc/shadow /etc/gshadow; do
 				"/^$name:/d" \
 				"$file"
 		fi
-	done < "$file"
+	# Not useless use of cat. We're buffering the file here to avoid conditions
+	# where we edit the file we're reading and face issues.
+	done < <(cat "$file")
 done