Added option -dummy_force

xorriso-dd-target/xorriso-dd-target

@@ -103,6 +103,10 @@ print_usage() {
   echo "                    advised device names to get a real write run."
   echo " -dummy             Report the -DO_WRITE actions but do not perform"
   echo "                    them."
+  echo " -dummy_force       If a single device name is given, do a run of"
+  echo "                    -dummy -DO_WRITE even against the advice of"
+  echo "                    this program. This probably shows you ways to"
+  echo "                    shoot your own foot."
   echo " -help              Print this text to stdout and then end the program."
   echo "Examples:"
   echo " $0 -with_sudo -list_all"
@@ -133,6 +137,7 @@ reset_job() {
   image_file=
   do_write=
   dummy_run=
+  dummy_force=
   do_plug_test=
 
   # Status
@@ -194,6 +199,11 @@ arg_interpreter() {
     elif test "$i" = "-dummy"
     then
       dummy_run=y
+    elif test "$i" = "-dummy_force"
+    then
+      dummy_run=y
+      do_write=y
+      dummy_force=y
     elif test "$i" = "-DO_WRITE"
     then
       do_write=y
@@ -501,7 +511,11 @@ write_image() {
     echo "No executable program umount found in: $sudo_x_dir_list" >&2
     return 6
   fi
-  if test -n "$dummy_run"
+  if test -n "$dummy_force"
+  then
+    echo "AGAINST THE ADVICE BY THIS PROGRAM, a daring user could do:"
+    dummy_run=y
+  elif test -n "$dummy_run"
   then
     echo "Would do if not -dummy:"
   fi
@@ -550,6 +564,10 @@ write_image() {
     echo "--- not activated yet ---"
   fi
 
+  if test -n "$dummy_force"
+  then
+    echo "BE SMART. BE CAUTIOUS. BEWARE."
+  fi
   return 0
 }
 
@@ -575,8 +593,26 @@ then
   with_vendor_model=
   show_reasons=
   candidates=$(list_devices | tr '\n\r' '  ')
-  num=$(echo $candidates | wc -w)
-  if test "$num" -eq 1
+  num_cand=$(echo $candidates | wc -w)
+  num_devs=$(echo $devs| wc -w)
+  if test -n "$dummy_force" -a "$num_devs" -ne 1
+  then
+    echo "SORRY: Refusing -dummy_force with not exactly one device." >&2
+    exit 10
+  fi
+  if test -n "$dummy_force" -a -n "$dummy_run" -a "$num_cand" -ne 1 
+  then
+    # -dummy_force in a situation where the program would normally refuse
+    echo "Overriding any advice because of -dummy_force"
+    candidates="$devs"
+    num_cand=1
+  elif test -n "$dummy_force"
+  then
+    # Downgrade -dummy_force to -dummy in order to avoid the ugly warning
+    dummy_force=
+    dummy_run=y
+  fi
+  if test "$num_cand" -eq 1
   then
     if test -n "$image_file"
     then
@@ -598,7 +634,7 @@ then
       echo "Would write to /dev/$candidates if an -image_file were given." >&2
       exit 0
     fi
-  elif test "$num" -gt 1
+  elif test "$num_cand" -gt 1
   then
     echo "WILL NOT WRITE ! More than one candidate found for target device:" >&2
     show_reasons=y