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Disable IDN from environment as documented

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Manual page of host contained instructions to disable IDN processing
when it was built with libidn2. When refactoring IDN support however,
support for disabling IDN in host and nslookup was lost. Use also
environment variable and document it for nslookup, host and dig.
This commit is contained in:
Petr Menšík 2018-09-25 18:08:46 +02:00 committed by Ondřej Surý
parent 0e74384991
commit ec1d9b80f5
4 changed files with 21 additions and 4 deletions
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4
bin/dig/dig.docbook
View File

@ -1330,7 +1330,9 @@ dig +qr www.isc.org any -x 127.0.0.1 isc.org ns +noqr
reply from the server.
If you'd like to turn off the IDN support for some reason, use
parameters <parameter>+noidnin</parameter> and
<parameter>+noidnout</parameter>.
<parameter>+noidnout</parameter> or define
the <envar>IDN_DISABLE</envar> environment variable.
</para>
</refsection>

4
bin/dig/dighost.c
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@ -628,8 +628,8 @@ make_empty_lookup(void) {
looknew->ttlunits = false;
looknew->qr = false;
#ifdef HAVE_LIBIDN2
looknew->idnin = true;
looknew->idnout = true;
looknew->idnin = (getenv("IDN_DISABLE") == NULL);
looknew->idnout = looknew->idnin;
#else
looknew->idnin = false;
looknew->idnout = false;

2
bin/dig/host.docbook
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@ -389,7 +389,7 @@
<command>host</command> appropriately converts character encoding of
domain name before sending a request to DNS server or displaying a
reply from the server.
If you'd like to turn off the IDN support for some reason, defines
If you'd like to turn off the IDN support for some reason, define
the <envar>IDN_DISABLE</envar> environment variable.
The IDN support is disabled if the variable is set when
<command>host</command> runs.

15
bin/dig/nslookup.docbook
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@ -478,6 +478,21 @@ nslookup -query=hinfo -timeout=10
</para>
</refsection>
<refsection><info><title>IDN SUPPORT</title></info>
<para>
If <command>nslookup</command> has been built with IDN (internationalized
domain name) support, it can accept and display non-ASCII domain names.
<command>nslookup</command> appropriately converts character encoding of
domain name before sending a request to DNS server or displaying a
reply from the server.
If you'd like to turn off the IDN support for some reason, define
the <envar>IDN_DISABLE</envar> environment variable.
The IDN support is disabled if the variable is set when
<command>nslookup</command> runs.
</para>
</refsection>
<refsection><info><title>FILES</title></info>
<para><filename>/etc/resolv.conf</filename>