ref: 9f77f04caee4e8d36b1fd2e01c7c7934f409f7a4
dir: /module/grid/demo/exproc.m/
Exproc : module { getslavedata : fn (lst: list of string); doblock : fn (block: int, bpath: string); readblock : fn (block: int, dir: string, chanout: chan of string): int; finish : fn (waittime: int, tkchan: chan of string); };