...that device. It is equivalent to opening the pseudoterminal multiplexor device open("/dev/ptmx", O_RDWR); on Linux systems, though the pseudoterminal multiplexor device is locat…...ng the pseudoterminal multiplexor device: int posix_openpt(int flags) { return open("/dev/ptmx", flags); } Calling posix_openpt () creates a pathname for the corresponding pseud…...pts (4) device open when switching to another mount namespace that uses a different /dev/ptmx instance may still accidentally find that a device path of the same name for that f…...pts (4) device open when switching to another mount namespace that uses a different /dev/ptmx instance may still accidentally find that a device path of the same name for that f…