Return codes over 1 byte

[Michael DePaulo]

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.

Cygwin Bash:

mike@executor ~
$ uname -a
CYGWIN_NT-10.0 executor 2.0.4(0.287/5/3) 2015-06-09 12:22 x86_64 Cygwin

mike@executor ~
$ cat return.c
int main (){ return 512; }

mike@executor ~
$ x86_64-w64-mingw32-gcc return.c -o return.exe

mike@executor ~
$ ./return.exe

mike@executor ~
$ echo $?
0

cmd.exe:

C:\cygwin64\home\mike>return.exe

C:\cygwin64\home\mike>echo %errorlevel%
512

-Mike

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