* Lorenzo Stoakes: > If you wish to utilise a pidfd interface to refer to the current process > (from the point of view of userland - from the kernel point of view - the > thread group leader), it is rather cumbersome, requiring something like: > > int pidfd = pidfd_open(getpid(), 0); > > ... > > close(pidfd); > > Or the equivalent call opening /proc/self. It is more convenient to use a > sentinel value to indicate to an interface that accepts a pidfd that we > simply wish to refer to the current process. The descriptor will refer to the current thread, not process, right? The distinction matters for pidfd_getfd if a process contains multiple threads with different file descriptor tables, and probably for pidfd_send_signal as well. Thanks, Florian
