bug#6546: bug#6705: w32 cmdproxy.c pass args to cygwin; erroneous charset conversion (problem description, solution/suggestion)

[Laimonas Vėbra]

Jason Rumney wrote:

> Don't use cmdproxy with Cygwin programs. If you need a shell in
> between, use Cygwin bash.  cmdproxy is a wrapper to get around some
> problems with various versions of the Windows native cmd.exe and
> command.com shell programs.  Mixing Cygwin and native Windows is not
> advised.

That doesn't solve the problem (try to pass utf-8 string from Emacs to 
cygwin/bin/(ba)sh.exe or any other cygwin app), nor it anyhow 
complicates the matter (cmdproxy just passes commandline to 
CreateProcess(); same happens in w32proc.c calling /bin/sh instead of 
cmdproxy.exe). The problem is not cmdproxy itself, but winapi/cygwin 
layer and the way the args are passed/transcoded using CreateProcess(A) 
-> cygwin layer.