[Bug 277959] Refactor of usr.sbin/daemon caused regression in restart parameter

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=277959

--- Comment #15 from commit-hook@FreeBSD.org ---
A commit in branch main references this bug:

URL:
https://cgit.FreeBSD.org/src/commit/?id=bc1dfc316a2bba97773a14b96f5e976a52524be4

commit bc1dfc316a2bba97773a14b96f5e976a52524be4
Author:     Kyle Evans <kevans@FreeBSD.org>
AuthorDate: 2024-11-19 19:51:27 +0000
Commit:     Kyle Evans <kevans@FreeBSD.org>
CommitDate: 2024-11-19 19:51:27 +0000

    daemon: stop rebuilding the kqueue every restart of the child

    We populate the kqueue with all of four kevents: three signal handlers and
    one for read of the child pipe.  Every time we start the child, we rebuild
    this kqueue from scratch for the child and tear it down before we exit and
    check if we need to restart the child.  As a consequence, we effectively
    drop any of the signals we're interested in between restarts.

    Push the kqueue out into the daemon state to avoid losing any signal events
    in the process, and reimplement the restart timer in terms of kqueue
timers.
    The pipe read event will be automatically deleted upon last close, which
    leaves us with only the signal events that really get retained between
    restarts of the child.

    PR:             277959
    Reviewed by:    des, markj
    Differential Revision:  https://reviews.freebsd.org/D47004

 usr.sbin/daemon/daemon.c | 121 +++++++++++++++++++++++++++++++++++++++--------
 1 file changed, 101 insertions(+), 20 deletions(-)

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