From: Ingo Schwarze <firstname.lastname@example.org> To: email@example.com Cc: firstname.lastname@example.org Subject: Re: makewhatis: segfault in dbadd when using -a Date: Thu, 19 Aug 2021 19:11:50 +0200 [thread overview] Message-ID: <20210819171150.GD56790@athene.usta.de> (raw) In-Reply-To: <email@example.com> Hi Lukas, sternenseemann wrote on Thu, Aug 19, 2021 at 12:02:13AM +0200: > On 8/11/21 5:09 PM, Ingo Schwarze wrote: >> Does the following patch make sense to you and work for you? > Yes, tested it with my real world case and it doesn't crash anymore! > Sorry for the delay with testing. No problem, thanks for testing. The patch is now committed to OpenBSD-current and to bsd.lv HEAD. > If a directory of the common manpath is only present in one > store-sysroot, the script will symlink the directory instead > of creating one and symlinking every file in it. > > Unfortunately, there is a few man sections which basically come > exclusively from one package, so from one store path: man1p and man3p > from Linux' man-pages-posix package. So for me > $GLOBAL_MANPATH/share/man3p is a symlink to > /nix/store/2fn4bf6xj9bxq3dpa6mznqbzqqanfdiv-man-pages-posix-2017a/share/man/man3p > and makewhatis(8) can't index it. Uh oh. So there *is* a real-world use case for symlinks to directories. It doesn't matter that on first sight, this whole approach feels quite fragile to me. Isn't that going to blow up in horrible ways as soon as somebody creates a package that also uses "man3p"? For example, on OpenBSD, "man3p" is used for manuals of Perl library functions. schwarze@isnote $ uname -a OpenBSD isnote.usta.de 6.9 GENERIC.MP#101 amd64 schwarze@isnote $ man -f 3p warnings encoding::warnings(3p) - Warn on implicit encoding conversions warnings(3p) - Perl pragma to control optional warnings warnings::register(3p) - warnings import function Anyway, if systems use that, considering whether it can be supported with resonable effort makes sense. No guarantee, of course. I'll think about it for a bit. > This is, however, a bit of an edge case and there is a workaround > (running a script which converts it into a proper directory), but still > a bit annoying. For the standard man sections this will probably never > happen. > > I also fear that traversing such symlinks is not easy to patch into the > portable version since it would mean changing treescan quite > significantly (which currently assumes that symlinks if they are "good" > point to regular files) Yes. > and you'd be hesitant to touch the in-tree one > for something like this?! Can't say without looking at the code in detail, so bear with me. Yours, Ingo -- To unsubscribe send an email to firstname.lastname@example.org
next prev parent reply other threads:[~2021-08-19 17:12 UTC|newest] Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top 2021-08-06 23:53 sternenseemann 2021-08-11 15:09 ` Ingo Schwarze 2021-08-18 22:02 ` sternenseemann 2021-08-19 17:11 ` Ingo Schwarze [this message] 2021-09-06 14:50 ` Ingo Schwarze 2021-09-06 15:52 ` sternenseemann 2021-09-06 17:12 ` Ingo Schwarze
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