D with CygWin

[unDEFER via Digitalmars-d]

I have found. I have to use cygwin_dll_init
==============================
$ cat try.d
import std.stdio;
import std.string;
import core.sys.windows.windows;

extern(C)
{
         alias int   function(const (char)*, int, ...) open_t;
         alias void   function() init_t;
         alias void  function(const (char)*s) perror_t;
         alias size_t function(int fs, void *buf, size_t count) 
read_t;
         open_t _my_open;
         init_t  init;
         perror_t my_perror;
         read_t  my_read;
}

void main()
{
         writefln("Open Library");
         HMODULE mod = cast(HMODULE) 
LoadLibrary("C:\\cygwin\\bin\\cygwin1.dll");
         if (mod is null)
         {
                 writefln("Failed load cygwin1.dll");
                 return;
         }

         writefln("Get Proc Init");
         init = cast(init_t) GetProcAddress(mod, 
"cygwin_dll_init");
         if (init is null)
         {
                 writefln("Failed open init symbol %s", 
GetLastError());
                 return;
         }

         init();

         writefln("Get Proc Open");
         _my_open = cast(open_t) GetProcAddress(mod, "open");
         if (_my_open is null)
         {
                 writefln("Failed open open symbol %s", 
GetLastError());
                 return;
         }

         writefln("Get Proc read");
         my_read = cast(read_t) GetProcAddress(mod, "read");
         if (my_read is null)
         {
                 writefln("Failed open read symbol %s", 
GetLastError());
                 return;
         }

         writefln("_open");
         int res = (*_my_open)(toStringz("/proc/cpuinfo"), 0);
         writefln("res=%s", res);
         if (res < 0)
         {
                 my_perror("Can't open file");
         }

         char[1024] buf;
         my_read(res, buf.ptr, buf.length);

         writefln("%s", buf);
}
========================================

$ ./try.exe
Open Library
Get Proc Init
Get Proc Open
Get Proc read
_open
res=0
processor       : 0
vendor_id       : GenuineIntel
cpu family      : 6
model           : 76
model name      : Intel(R) Pentium(R) CPU  N3700  @ 1.60GHz
...


The problem of the method only errno variable which doesn't 
content right error number.