[LTP] [PATCH] cgroup_fj: Check start_path before removing directories in cleanup

[Petr Vorel]

Hi Wake Liu,

Thanks, merged with minor changes.

> +++ b/testcases/kernel/controllers/cgroup_fj/cgroup_fj_common.sh @@ -79,9
> +79,10 @@ common_cleanup() { killall -9 cgroup_fj_proc >/dev/null 2>&1

> -    tst_res TINFO "Removing all ltp subgroups..."
> -
> -    [ -d "$start_path" ] && find "$start_path" -depth -type d -exec rmdir '{}' \;
> +    if [ -n "$start_path" ] && [ -d "$start_path" ]; then
> +        tst_res TINFO "Removing all ltp subgroups..."
Let's remove dots.

> +        find "$start_path" -depth -type d -exec rmdir '{}' \;
> +    fi

>      cgroup_cleanup

> diff --git a/testcases/kernel/controllers/cgroup_fj/cgroup_fj_function.sh b/testcases/kernel/controllers/cgroup_fj/cgroup_fj_function.sh
> index b0c9410ca..61b7a0415 100755
> --- a/testcases/kernel/controllers/cgroup_fj/cgroup_fj_function.sh
> +++ b/testcases/kernel/controllers/cgroup_fj/cgroup_fj_function.sh
> @@ -231,7 +231,7 @@ cleanup()
>          wait $pid >/dev/null 2>&1
>      fi

> -    rmdir "$start_path/ltp_1" >/dev/null 2>&1
> +    [ -n "$start_path" ] && [ -d "$start_path/ltp_1" ] && rmdir "$start_path/ltp_1" >/dev/null 2>&1
Now we don't need to mask errors, right?
And a bit long line.

Also, I'm not sure if ... && ... can't bring problems on 'set -e' setup,
because if code is not executed $? gets 1. That's why I use only ... || ...
or if/then/else after which $? is always 0.

>      common_cleanup
>  }

Merged with following diff.

Kind regards,
Petr

+++ testcases/kernel/controllers/cgroup_fj/cgroup_fj_common.sh
@@ -79,9 +79,10 @@ common_cleanup()
 {
     killall -9 cgroup_fj_proc >/dev/null 2>&1
 
-    tst_res TINFO "Removing all ltp subgroups..."
-
-    [ -d "$start_path" ] && find "$start_path" -depth -type d -exec rmdir '{}' \;
+    if [ -n "$start_path" ] && [ -d "$start_path" ]; then
+        tst_res TINFO "Removing all ltp subgroups"
+        find "$start_path" -depth -type d -exec rmdir '{}' \;
+    fi
 
     cgroup_cleanup
 
diff --git testcases/kernel/controllers/cgroup_fj/cgroup_fj_function.sh testcases/kernel/controllers/cgroup_fj/cgroup_fj_function.sh
index b0c9410ca3..2b0dafc544 100755
--- testcases/kernel/controllers/cgroup_fj/cgroup_fj_function.sh
+++ testcases/kernel/controllers/cgroup_fj/cgroup_fj_function.sh
@@ -231,7 +231,10 @@ cleanup()
         wait $pid >/dev/null 2>&1
     fi
 
-    rmdir "$start_path/ltp_1" >/dev/null 2>&1
+    if [ -n "$start_path" ] && [ -d "$start_path/ltp_1" ]; then
+        rmdir "$start_path/ltp_1"
+    fi
+
     common_cleanup
 }