= workdir: get the current working directory     include "workdir.m";    workdir := load Workdir Workdir->PATH;     init:  fn(): string; Workdir returns a string representation of the working direc‐tory of the invoking process. When Inferno boots, the initial process has / for its workingdirectory. == source/appl/lib/workdir.b == see ALSOsys-chdir(2), sys-fd2path(2), sys-stat(2)