Date: Thu, 21 Apr 2016 23:48:00 +0300 From: Dan Partelly <dan_partelly@rdsor.ro> To: =?utf-8?Q?Edward_Tomasz_Napiera=C5=82a?= <trasz@FreeBSD.org> Cc: freebsd-current <freebsd-current@freebsd.org> Subject: Re: [CFT] packaging the base system with pkg(8) Message-ID: <7F12F680-080B-4DB3-81A5-CC5282B78034@rdsor.ro> In-Reply-To: <20160421202023.GB33506@brick> References: <E1asbZj-0003Ra-Qs@rmm6prod02.runbox.com> <76093.1461096570@critter.freebsd.dk> <5716AD65.8070007@shrew.net> <BF66EA01-E073-45F0-8F9E-22D57E8871B0@bsdimp.com> <5716FA70.4080604@freebsd.org> <571765BB.3050908@quip.cz> <79117ce18bd3332c7df3e55e12a161b4@rdsor.ro> <20160421095706.GA57206@brick> <30F6CCDE-E099-49EF-9A1A-68F147FBF50B@rdsor.ro> <20160421202023.GB33506@brick>
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Yes, you are right it misses the media change handler in devd.conf.=20 maybe it should bementioned somewhere in a man page if it is not already there. Thanks for the pointer. Anyway, if I would have written the system, what I would have done is to consolidate both user mode daemons into one and make this daemon a client of devd, fstyp a library, and handle all removable=20 media inside transparent to the user, without requiring any = modifications to devd.conf, and without relaying on shell scripts.=20 Is there any reason you did not took this approach ? This is not criticism, I am genuinely interested. > and simply > retrofit the changes back to autofs - but that hasn't happened (yet). Please consider doing it. A kevent on /media would allow other programs to see how volumes come and go, and I can imagine several situations=20 where this can be handy. And too many directories left there do become annoying.=20 > On 21 Apr 2016, at 23:20, Edward Tomasz Napiera=C5=82a = <trasz@FreeBSD.org> wrote: >=20 > On 0421T1526, Dan Partelly wrote: >> The scenario is: >>=20 >> Let=E2=80=99s say I have autofs_enable , working with media map. >>=20 >> If I have a CD in CD drive , all is well and when the system is fully = booted up >> /media contains a directory through which I can access the content of = the=20 >> CD-ROM. Now if you eject this CD , and insert a new one, nothing = happens. >> /media does not contain a new access point for the new disk inserted = in the=20 >> device. =20 >>=20 >> What I would expect is when I change the media in Cd-rom , a new=20 >> access point for the volume in question should be reated in /media. >>=20 >> Perhaps this functionality is exposed differently by the automounter, >> but them I would not expect the CDrom to be accessible at all though = the=20 >> media map.=20 >=20 > If by "access point" you mean the directory, then it will, unless the = CD > doesn't have a label - in that case the device name will be used = instead, > and since it's the same device, it will be the same name - usually = "cd0". >=20 > However - I've just checked to make sure and it works the way it = should. > What you're decribing seems like you're missing the part of = devd.conf(5) > responsible for notifying autofs about media change. Do you? >=20 >>> he problem here is that it's quite hard to fix, there's a risk >>> of breaking existing functionality, and the problem is largely = cosmetic. >>=20 >> until you have more than 10 of them there, when it largely annoying. >> anyway, what is the reason it is very hard to fix and it would break = existing >> functionality. can you please shed some light ? =20 >=20 > Basically, the autofs doesn't support removing the nodes. It wasn't > really required for the usual use case, and it simplified the code a = lot. > Plan was to pick it up again with my next filesystem project, and = simply > retrofit the changes back to autofs - but that hasn't happened (yet). >=20 > [..]
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