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This was broken in 7c63a98c28d477.
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Adhering to the review in GitHub PR #2066:
The start time should be set so the resolver file can get
re-read as soon as possible to not get the whole timeout time
before detecting that the resolver file has been created.
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If .hosts file does not exist when kernel application starts, it will never get reloaded.
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Verify with:
erl -noshell -eval 'io:write(inet_res:lookup("localhost",in,a)),io:nl(),init:stop().'
Prints:
[{127,0,0,1}]
Without this correction you will get [] on a hostname that works
later after system start.
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After the VM time changes inet_db:times/0 instead of returning number of
seconds since 1970, returns number of seconds since the VM start. As a
result, if inet_res:lookup is called right after the system start, the
condition for re-reading /etc/resolv.conf will not be met (time
difference between last access: 0, and the value returned from
inet_db:times/0 -> [0-5) is lower than 5 seconds) and no nameservers
will be used.
This patch allows /etc/resolv.conf to be read immediately after the
system is started.
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* weiss/case-insensitive-lookups:
inet_res: Make host name lookups case-insensitive
OTP-13083
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This partly reverts commit 8152505ea3793037984a7f3349ac95cc20c4e44c.
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Conflicts:
lib/kernel/src/inet_db.erl
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* rani/inet_gethostbyname_fixes:
inet_res_SUITE: testcase fixes for legacy DNS resolver (Solaris 8)
inet_res: /etc/resolv.conf: use domain as default search list
inet: delayed/avoided read of /etc/resolv.conf and /etc/hosts
inet_gethost_native: workaround for empty result hostname on MacOS X
inet_res_SUITE: testcase fix for empty domain name
inet:gethostbyname improved to parse IP strings and look up own hostname
OTP-8426 The resolver routines failed to look up the own node name as
hostname, if the OS native resolver was erroneously configured,
bug reported by Yogish Baliga, now fixed.
The resolver routines now tries to parse the hostname as an IP
string as most OS resolvers do, unless the native resolver is
used.
The DNS resolver inet_res and file resolver inet_hosts now do not
read OS configuration files until they are needed. Since the
native resolver is default, in most cases they are never needed.
The DNS resolver's automatic updating of OS configuration file
data (/etc/resolv.conf) now uses the 'domain' keyword as default
search domain if there is no 'search' keyword.
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When the search list option in /etc/resolv.conf was empty, the
domain option was not used as default search domain.
That has been fixed in this patch.
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The 'file' and 'dns' lookup methods configuration files
are now read and parsed at the time of the first lookup
instead of at boot time when per default none of these
lookup methods are used.
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