The local resolver lib will use either /etc/hosts file or dns queries in
the order defined in your /etc/host.conf
You mean /etc/nsswitch.conf?
I probably do. Is /etc/host.conf still of any use?
Actually, I'm not sure. I've always edited nsswitch.conf to get it to
do what I want, with good results.
I see with strace that when I ping <somehost>, both nsswitch.conf and
host.conf are opened. The man pages don't reveal anything about their
relationship, so I guess I'll have to take a look at the glibc sources
tonight.
As close as I can tell from reading the code (which is to say, I am
making an only slightly educated guess), the 'order' keyword in
host.conf is pretty much ignored by current glibc versions. Host.conf
is only consulted by the libnss_files.so module, and then only for the
'multi' option. The order in nsswitch.conf is authoritative.
This seems to be confirmed by a few "strace ping" attempts with
various configurations.
Thanks Rich,
I also was curious and spent some time googling
and reading man pages (without success) but didn't go that far:)
Sasha
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