ref: d2ddb4edfec6500aa3e59e0517e9cc46eb146310
dir: /appl/lib/workdir.b/
implement Workdir; include "sys.m"; include "workdir.m"; init(): string { sys := load Sys Sys->PATH; fd := sys->open(".", Sys->OREAD); if(fd == nil) return nil; return sys->fd2path(fd); }