Option -fail for test_hardlinks to simulate failure, moved tmp to releng/tmp

releng/test_hardlinks

@@ -14,6 +14,7 @@ export in_iso=""
 export copy_on_disk="$workdir"/xorriso_hardlinks_copy_dir
 export keep=0
 export failure=0
+export simulate_failure=0
 export next_is_xorriso=0
 export next_is_rc=0
 export bad=0
@@ -106,8 +107,11 @@ do
   elif test x"$i" = x"-v"
   then
     report_about="-report_about ALL"
+  elif test x"$i" = x"-fail"
+  then
+    simulate_failure=1
   else
-    echo "Usage: $0 [-rc FILE] [-keep] [-cleanup] [-xorriso PATH] [-v]" >&2
+    echo "Usage: $0 [-rc FILE] [-keep] [-cleanup] [-fail] [-xorriso PATH] [-v]" >&2
     exit 2
   fi
 done
@@ -191,8 +195,14 @@ echo "=== Copying from image to temporary disk tree" >&2
   -extract "$in_iso" "$copy_on_disk"
 
 
-## For testing the test: Let it fail deliberately
-# rm "$copy_on_disk"/file_1_link_b
+if test "$simulate_failure" = 1
+then
+  echo "===" >&2
+  echo "=== SIMULATING FAILURE BY REMOVING AN EXTRACTED FILE" >&2
+  echo "===" >&2
+  echo "FAIL : $prog : Simulated failure caused by option -fail"
+  rm "$copy_on_disk"/file_1_link_b
+fi
 
 
 echo "=== Comparing original disk tree and temporary one" >&2
@@ -230,6 +240,7 @@ echo
 if test "$failure" = 1
 then
   echo "======== $prog :" 'FAILED'
+  echo 
   exit 1
 else
   echo "======== $prog :" "Passed"