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I agree with Dave. Typically, '-1' is meant to set all bits to 1 to flag a general error condition. Exiting with '255' would be probably be a better direct translation, but unless some other process is checking for a specific return value, anything other than zero would suffice.
I agree. However it should not give an error, but it should translate it to 255. The problem is that it interprets the value -1 as an option. Eventually you can try
Code:
exit -- -1
but take in mind that the shell sees the exit code as 255.
The above advice is correct.
In a addition, the code you've shown does not set success to anything, so the condition will fail, as it does.
Strictly speaking (as you seem to be doing a numerical comparison), the syntax is
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