Hey everyone, /* v1 */ This adds the ability to wait on processes using pidfds. This is one of the few missing pieces to make it possible to manage processes using only pidfds.
Please note the following major changes (More details can be found in the individual commit changelogs.): - Add the new type P_PIDFD to waitid() instead of a new dedicated pidfd_wait() syscall. This is the same approach we discussed a few months ago and still prefer over adding a dedicated syscall. - Adapt the tests to the new type P_PIDFD for waitid(). - Remove struct waitid_info patch. This will be sent out as a separate patch. - Remove CLONE_WAIT_PID patch. This will be sent out as a separate patch. The core patch for waitid is pleasantly small. The largest change is caused by adding proper tests for waitid(P_PIDFD). /* v0 */ Link: https://lore.kernel.org/lkml/20190724144651.28272-1-christ...@brauner.io Thanks! Christian Christian Brauner (2): pidfd: add P_PIDFD to waitid() pidfd: add pidfd_wait tests include/linux/pid.h | 4 + include/uapi/linux/wait.h | 1 + kernel/exit.c | 25 ++- kernel/fork.c | 8 + kernel/signal.c | 7 +- tools/testing/selftests/pidfd/pidfd.h | 25 +++ tools/testing/selftests/pidfd/pidfd_test.c | 14 -- tools/testing/selftests/pidfd/pidfd_wait.c | 245 +++++++++++++++++++++ 8 files changed, 311 insertions(+), 18 deletions(-) create mode 100644 tools/testing/selftests/pidfd/pidfd_wait.c -- 2.22.0
