On 05/11/14 21:52, Ximin Luo wrote: > On 05/11/14 20:54, Zbigniew Jędrzejewski-Szmek wrote: >> On Wed, Nov 05, 2014 at 08:12:39PM +0000, Ximin Luo wrote: >>> All I care is that "service x start" works. It does not. This is >>> correctly called "systemd breaks existing software" - it is breaking >>> the sysvinit behaviour. >> >> Let's look what LSB says: >> >> http://refspecs.linuxbase.org/LSB_3.1.1/LSB-Core-generic/LSB-Core-generic/iniscrptact.html >> >>> For all other >> [meaning everything apart from 'status'] >>> init-script actions, the init script shall return an exit status of >>> zero if the action was successful. Otherwise, the exit status shall >>> be non-zero >> [...] >>> 6 program is not configured >> >> Esentially, your scripts tells systemd "action was sucessful", and >> systemd has no reason (or way) to doubt that. >> > > Sure, I get that my script doesn't work perfectly in this area. I will fix > all of this stuff. > > However, systemd is *also* at fault for not being able to deal with this. > With sysvinit, a "start" action is executed regardless of any external > considerations - it's just a shell script with a "start" clause. This > behaviour should be preserved by systemd; however what actually happens is > that this behaviour is overridden quite obnoxiously. > > Nowhere does the LSB mention "scripts should not expect to work in the > future, if they output a non-standard return code previously". This is what > systemd does to my script (and other scripts that use dh_installinit). > > So there is still a bug in /lib/lsb/init-functions.d/40-systemd. >
Take another example: even if my script did work perfectly according to the LSB, a service might stop *itself* a short time after "service x start" completes with return code 0. systemd will be unable to detect this [1], and a subsequent "service x start" will not work under systemd (because it thinks it's active, and treats the "start" subcommand as a no-op), even though this would work under plain sysvinit. X [1] without providing metadata in a pseudo-header - but we're working under the assumption that initscript writers should not have to care about systemd. -- GPG: 4096R/1318EFAC5FBBDBCE git://github.com/infinity0/pubkeys.git
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