Date: Wed, 4 Nov 2015 00:13:10 +0100 From: Jilles Tjoelker <jilles@stack.nl> To: Dirk Engling <erdgeist@erdgeist.org> Cc: freebsd-rc@FreeBSD.org Subject: Re: etc/rc.subr rc_pid for start_cmd Message-ID: <20151103231310.GA70094@stack.nl> In-Reply-To: <563933AB.5090407@erdgeist.org> References: <563933AB.5090407@erdgeist.org>
next in thread | previous in thread | raw e-mail | index | archive | help
On Tue, Nov 03, 2015 at 11:22:35PM +0100, Dirk Engling wrote: > while fixing startup scripts for qmail I fell for the trap to assume > rc.subr to do the "${name} already running? " check for me. When I then > compared my rc script to several others from various ports/*/*/files/ > directories I could not spot any difference until I noticed they were > also doing it wrong, and would happily spawn more daemons when their > custom start_cmd was invoked. > I then went over a list returned from "grep -ri start_cmd /usr/ports/" > and found that around a third of tools (that install their rc scripts > from the /files/ directory, i.e. they were written by FreeBSD port > maintainers, not some unwashed Linux hippies, who do not know better) do > not really do the check either. While the other 2/3 hilariously > re-implemented the rc.subr check in the most creative ways. > Has there been any historic reason this check was not done somewhere > around /etc/rc.subr:2088 like > if [ $rc_arg = "start" -a -z "$rc_fast" -a -n "$rc_pid" ]; then > if [ -z "$rc_quiet" ]; then > echo 1>&2 "${name} already running? " \ > "(pid=$rc_pid)." > fi > return 1 > fi > maybe with a knob to turn that off for daemons that really know what > they're doing? If not I propose to move the check before custom > ${XXX_cmd} evaluation and will be glad to provide a diff. The original idea was to skip the "already running" checks while booting the system since they are quite slow, and to perform them when a manual service FOO start is done. -- Jilles Tjoelker
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20151103231310.GA70094>