Ccing linux-api for the user-visible changes per Roland's suggestion. Not sure if the current behavior is documented somewhere. but should the new behavior be documented in pipe(7) and prctl(2) ?
This patch was recently added to -mm tree. Sukadev Sukadev Bhattiprolu [[email protected]] wrote: | | From: Sukadev Bhattiprolu <[email protected]> | Date: Tue, 16 Dec 2008 17:07:17 -0800 | Subject: [PATCH] SEND_SIG_NOINFO: Set si_pid to tgid instead of pid | | POSIX requires the si_pid to be the process id of the sender, so ->si_pid | should really be set to 'tgid'. This change does have following changes | in behavior: | | - When sending pdeath_signal on re-parent to a sub-thread, ->si_pid | cannot be used to identify the thread that did the re-parent since | it will now show the tgid instead of thread id. | | - A multi-threaded application that expects to find the specific | thread that encountered a SIGPIPE using the ->si_pid will now | break. | | Signed-off-by: Sukadev Bhattiprolu <[email protected]> | --- | kernel/signal.c | 2 +- | 1 files changed, 1 insertions(+), 1 deletions(-) | | diff --git a/kernel/signal.c b/kernel/signal.c | index d11e5f8..700d767 100644 | --- a/kernel/signal.c | +++ b/kernel/signal.c | @@ -856,7 +856,7 @@ static int send_signal(int sig, struct siginfo *info, struct task_struct *t, | q->info.si_signo = sig; | q->info.si_errno = 0; | q->info.si_code = SI_USER; | - q->info.si_pid = task_pid_nr_ns(current, | + q->info.si_pid = task_tgid_nr_ns(current, | task_active_pid_ns(t)); | q->info.si_uid = current_uid(); | break; | -- | 1.5.2.5 | | -- | To unsubscribe from this list: send the line "unsubscribe linux-kernel" in | the body of a message to [email protected] | More majordomo info at http://vger.kernel.org/majordomo-info.html | Please read the FAQ at http://www.tux.org/lkml/ _______________________________________________ Containers mailing list [email protected] https://lists.linux-foundation.org/mailman/listinfo/containers _______________________________________________ Devel mailing list [email protected] https://openvz.org/mailman/listinfo/devel
