Contents
1. Invocation Options
1.1. -c
-c [options] -- CommandString [ARG0 [ARG...]]
- commands are read from the first non-option argument (required)
$0 is set as the second non-option argument defaulting to "bash"
all remaining non-option arguments are assigned to the positional parameters starting at $1
[[ $- =~ c ]] will return true