# Miscellaneous functions

cygwin_attach_handle_to_fd

3 Cygwin API Reference

cygwin_attach_handle_to_fd

    #include <sys/cygwin.h>

    int
    cygwin_attach_handle_to_fd
    char *name
    int fd
    HANDLE handle
    int bin
    int access

### Description

This function can be used to turn a Win32 "handle" into a posix-style file handle. `fd` may be -1 to make cygwin allocate a handle; the actual handle is returned in all cases.

Even after using function, Cygwin doesn't know anything about the underlying file or device. It just tries to supply the typical file functions on a "best-effort" basis. Use with care. Don't expect too much.

cygwin_internal

3 Cygwin API Reference

cygwin_internal

    #include <sys/cygwin.h>

    uintptr_t
    cygwin_internal
    cygwin_getinfo_types t
    ...

### Description

This function gives you access to various internal data and functions. It takes two arguments. The first argument is a type from the 'cygwin_getinfo_types' enum. The second is an optional pointer.

Stay away unless you know what you're doing.

cygwin_stackdump

3 Cygwin API Reference

cygwin_stackdump

    #include <sys/cygwin.h>

    void
    cygwin_stackdump

### Description

Outputs a stackdump to stderr from the called location.