vm/os-unix.cpp: set pipe file descriptors to close on exec
vm/os-unix.cpp: set pipe file descriptors to close on exec
mcandre/factor,mcandre/factor,erg/factor,erg/factor,erg/factor,mcandre/factor,erg/factor,erg/factor,mcandre/factor,erg/factor,mcandre/factor,mcandre/factor,mcandre/factor,erg/factor