It should be $cmd
instead of $($cmd)
. Works fine with that on my box.
Edit: Your script works only for one-word commands, like ls. It will not work for "ls cpp". For this to work, replace cmd="$1"; $cmd
with "$@"
. And, do not run your script as command="some cmd"; safeRun command
, run it as safeRun some cmd
.
Also, when you have to debug your bash scripts, execute with '-x' flag. [bash -x s.sh].