Function:   gds___image

Purpose:    obtain file descriptor of the image component of a set.

Author:     J.P. Terlouw

Category:   BASIC-GDS

File:       gdsd_basic.c

Use:        int gds___image( fchar set, void (*proc)() )

            The function returns the file descriptor of the image file.
            If necessary, the set and/or the image file is opened.
            The function specified in the second argument will be called
            when the set is closed. The prototype of this function is:
              void proc(int fd);
            The argument 'fd' is the image file descriptor.

Updates:    Mar  4, 1994: JPT, document created.