fix: Support read-only images (#432)

.github/ISSUE_TEMPLATE/QUESTION.yml

@@ -6,9 +6,7 @@ body:
   - type: markdown
     attributes:
       value: |
-        Have a general question about Windows for Docker?
-        Please do not use this form for technical issues.
-        And make sure to check the [FAQ](https://github.com/dockur/windows/blob/master/readme.md) first!
+        Please do not use this form for technical issues, and make sure to check the [FAQ](https://github.com/dockur/windows/blob/master/readme.md) first!
   - type: textarea
     id: question
     attributes:

src/power.sh

@@ -6,13 +6,14 @@ set -Eeuo pipefail
 QEMU_TERM=""
 QEMU_PORT=7100
 QEMU_TIMEOUT=110
-QEMU_PID="/run/shm/qemu.pid"
-QEMU_PTY="/run/shm/qemu.pty"
-QEMU_LOG="/run/shm/qemu.log"
-QEMU_OUT="/run/shm/qemu.out"
-QEMU_END="/run/shm/qemu.end"
+QEMU_DIR="/run/shm"
+QEMU_PID="$QEMU_DIR/qemu.pid"
+QEMU_PTY="$QEMU_DIR/qemu.pty"
+QEMU_LOG="$QEMU_DIR/qemu.log"
+QEMU_OUT="$QEMU_DIR/qemu.out"
+QEMU_END="$QEMU_DIR/qemu.end"
 
-rm -f /run/shm/qemu.*
+rm -f "$QEMU_DIR/qemu.*"
 touch "$QEMU_LOG"
 
 _trap() {
@@ -68,10 +69,11 @@ finish() {
   if [ ! -f "$STORAGE/windows.boot" ] && [ -f "$STORAGE/$BASE" ]; then
     # Remove CD-ROM ISO after install
     if ready; then
-      rm -f "$STORAGE/$BASE"
+      if rm -f "$STORAGE/$BASE" 2>/dev/null; then
         touch "$STORAGE/windows.boot"
       fi
     fi
+  fi
 
   pid="/var/run/tpm.pid"
   [ -s "$pid" ] && pKill "$(<"$pid")"