On 2016-11-16 09:48, Ximin Luo wrote: > Aurelien Jarno: > > On 2016-11-15 16:00, Ximin Luo wrote: > >> Package: glibc > >> Version: 2.24-5 > >> Severity: important > >> Tags: upstream patch > >> Forwarded: https://sourceware.org/bugzilla/show_bug.cgi?id=20826 > >> > >> Dear Maintainer, > >> > >> posix/tst-getaddrinfo.c is causing glibc to FTBFS on > >> tests.reproducible-builds.org: > >> > >> https://tests.reproducible-builds.org/debian/rbuild/unstable/amd64/glibc_2.24-5.rbuild.log.gz > >> > >> The attached patch should fix this; I gave a more detailed description in > >> the upstream bug report. > > > > Hum, I am not sure it is the correct way to fix that. I think that > > libnss_files should be able to resolve entries from /etc/hosts when the > > query is relative, but also when it is fully qualified. This is how > > libnss_dns behaves. > > > > Looks like I was wrong before about getaddrinfo bypassing /etc/hosts, and it > does indeed look at /etc/hosts. > > $ sudo -u sbuild getent hosts localhost > 127.0.0.1 profitbricks-build17-amd64.debian.net > profitbricks-build17-amd64 localhost > $ sudo -u sbuild getent hosts localhost. > # no results > > However if you change "localhost" in /etc/hosts to "localhost." then the > above results would be reversed. > > What do you think the full behaviour should be?
I think that it should returns 127.0.0.1 for both 'localhost' and 'localhost.' > > Also note that technically the glibc doesn't require network access, > > just a DNS server able to resolve 'localhost.' > > > > So how do you want to fix this? glibc doesn't currently build-depend on a > name server, and I assume you wouldn't want to do that. Can you give me some > hints on what to patch, to fix libnss_files? My point about that, is that a package should build without network access. Now I am not sure it actually means without even a nameserver. Anyway I don't know that part of the code a lot, but the fix has probably to be done in nss/nss_files/files-hosts.c. Aurelien -- Aurelien Jarno GPG: 4096R/1DDD8C9B aurel...@aurel32.net http://www.aurel32.net
