Return codes over 1 byte

Michael DePaulo
Fri Jul 10 00:21:00 GMT 2015

On Thu, Jul 9, 2015 at 7:42 PM, Yaakov Selkowitz <> wrote:
> On Thu, 2015-07-09 at 19:30 -0400, Michael DePaulo wrote:
>> mark06 mentioned this on IRC today and then left the channel about 1 hour later:
>> <mark06> has anyone ever discussed exit codes above one byte? they are
>> valid on modern windows, but cygwin's bash will mess them
>> I was curious, so I googled it (I could not find an answer) and then
>> tried it out. I can confirm the what he said.
> --
> Yaakov

Right, only the least significant 8 bits are outputted. So "257" becomes "1".

I thought I read somewhere that the Cygwin mintty terminal + bash
shell is supposed to be suitable for running native windows apps.
Maybe I was thinking of the 1st paragraph on this page after the list
of features:

Or maybe I was thinking about this reply:

Either way, I feel like this should be documented somewhere. Perhaps I
should submit a patch to add a section like "return codes" to to this


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