fix: Avoid shadowing PID output variables (#1337)

src/power.sh

@@ -67,18 +67,8 @@ displayReason() {
 
 readQemuPid() {
 
-  local -n _pid="$1"
-  local file
-  local pid
-
-  for file in "$QEMU_START_PID" "$QEMU_PID"; do
-    if readPidFile pid "$file"; then
-      _pid="$pid"
-      return 0
-    fi
-  done
-
-  return 1
+  readPidFile "$1" "$QEMU_START_PID" && return 0
+  readPidFile "$1" "$QEMU_PID"
 }
 
 qemuPidFile() {
@@ -102,16 +92,14 @@ waitQemuExit() {
 
 waitQemuPid() {
 
-  local -n _pid="$1"
-  local cnt=0 value
+  local cnt=0
 
-  while ! readQemuPid value; do
+  while ! readQemuPid "$1"; do
     sleep 0.02
     cnt=$((cnt + 1))
     (( cnt >= 50 )) && return 1
   done
 
-  _pid="$value"
   return 0
 }
 

src/utils.sh

@@ -10,13 +10,11 @@ warn () { printf "%b%s%b" "\E[1;31m❯ " "Warning: ${1:-}" "\E[0m\n" >&2; }
 readPidFile() {
 
   local -n _pid="$1"
-  local file="$2"
-
   _pid=""
 
-  [ -s "$file" ] || return 1
+  [ -s "$2" ] || return 1
 
-  _pid=$(<"$file")
+  _pid=$(<"$2")
 
   if [[ ! "$_pid" =~ ^[1-9][0-9]*$ ]]; then
     _pid=""