CONNLD(4) CONNLD(4) NAME connld - unique stream connection DESCRIPTION This stream module (see stream(4)) is used to provide unique connections to a server. The file descriptor fd should refer to an end of a stream-usually a pipe-that will subse- quently be mounted onto a file by gmount(2). When an open or creat(2) call is applied to a stream-associated file with this module installed, a new pipe is created internally. A message identical to that described for the FIOSNDFD request (see stream(4)) is sent along the stream to the process at the other end. This process must respond in one of these ways: it may simply write some data, or reply with ioctl(fd1, FIOACCEPT, (char *)NULL); Then the attempt to open the stream succeeds, and the returned file descriptor refers to the new pipe, whose other end is held by the server process. It may also respond by passing a new file descriptor, using ioctl(fd1, FIOSNDFD, &fd2); Then the local end of the internally-created pipe is dis- carded, and the returned file descriptor refers to the transmitted file. On the other hand, if the server process closes the trans- mitted file descriptor, or does ioctl(fd1, FIOREJECT, (char *)NULL); then the attempt to open fails. Finally, if the entity, whether process or device, that receives the FIOSNDFD message fails to respond in some appropriate way, the process attempting to open the file will wait until it is sent a signal, or the system is rebooted, or the end of eternity, whichever comes first.