Code review comment for lp://qastaging/~liuyq0307/lava-master-image-scripts/fix-trap-on-exit

$ /bin/sh -c "trap EXIT"
trap: usage: trap [-lp] [[arg] signal_spec ...]
$ bash -c "trap EXIT"
$ dash -c "trap EXIT"
$ ll /bin/sh
lrwxrwxrwx 1 root root 9 6月 25 13:37 /bin/sh -> /bin/bash*
$ trap EXIT
$

seems only the sh link has problems