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Date: Wed, 28 May 2014 17:41:19 +0200
Subject: Re: Bash silently truncates the Command Line when called  programatically via CreateProcess as MAXPATHLEN was reduced to 8192 from  16384
From: "Houder" <houder@xs4all.nl>
To: cygwin@cygwin.com
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Hi Abhijit,

> Please note, when I am saying the path is getting truncated, its the
> bash that is truncating it. Also, its immaterial how and what is
> getting called. With the latest Cygwin, any program that is compiled
> and linked with the CRT would exhibit this behavior. The truncation
> issue in the CRT is best demonstrated by the following Code couplets
>
> Caller.cpp
> --------------
> [snip]
>
> Callee.cpp
> -------------
> [snip]

Using your code couplets (and modifying them a bit), I did some experimentation, and observed:

 - the first parameter to callee, if quoted, is truncated to 8186 bytes in case the length of
   the argument without quotes, exceeds the aforementioned length.
 - no truncation occurs in case the parameter is not quoted.

As far as I can tell, it is not bash, but the Cygwin supervisor, that does the truncation.

Henri


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