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93 lines
3.4 KiB
93 lines
3.4 KiB
From ec50eff97c259b5bfbfa4e050d69fe7b39b0f15a Mon Sep 17 00:00:00 2001
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From: =?UTF-8?q?Petr=20Men=C5=A1=C3=ADk?= <pemensik@redhat.com>
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Date: Tue, 25 Sep 2018 18:08:46 +0200
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Subject: [PATCH] Disable IDN from environment as documented
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Manual page of host contained instructions to disable IDN processing
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when it was built with libidn2. When refactoring IDN support however,
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support for disabling IDN in host and nslookup was lost. Use also
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environment variable and document it for nslookup, host and dig.
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Support variable CHARSET=ASCII to disable IDN, supported in downstream
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RH patch since RHEL 5.
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---
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bin/dig/dig.docbook | 4 +++-
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bin/dig/dighost.c | 5 +++++
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bin/dig/host.docbook | 2 +-
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bin/dig/nslookup.docbook | 15 +++++++++++++++
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4 files changed, 24 insertions(+), 2 deletions(-)
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diff --git a/bin/dig/dig.docbook b/bin/dig/dig.docbook
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index 5d19301..933af79 100644
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--- a/bin/dig/dig.docbook
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+++ b/bin/dig/dig.docbook
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@@ -1312,7 +1312,9 @@ dig +qr www.isc.org any -x 127.0.0.1 isc.org ns +noqr
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reply from the server.
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If you'd like to turn off the IDN support for some reason, use
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parameters <parameter>+noidnin</parameter> and
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- <parameter>+noidnout</parameter>.
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+ <parameter>+noidnout</parameter> or define
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+ the <envar>IDN_DISABLE</envar> environment variable.
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+
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</para>
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</refsection>
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diff --git a/bin/dig/dighost.c b/bin/dig/dighost.c
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index 5eabc1f..73aaab8 100644
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--- a/bin/dig/dighost.c
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+++ b/bin/dig/dighost.c
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@@ -826,6 +826,11 @@ make_empty_lookup(void) {
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looknew->badcookie = true;
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#ifdef WITH_IDN_SUPPORT
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looknew->idnin = isatty(1)?(getenv("IDN_DISABLE") == NULL):false;
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+ if (looknew->idnin) {
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+ const char *charset = getenv("CHARSET");
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+ if (charset && !strcmp(charset, "ASCII"))
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+ looknew->idnin = false;
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+ }
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#else
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looknew->idnin = false;
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#endif
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diff --git a/bin/dig/host.docbook b/bin/dig/host.docbook
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index da0f8fb..9689b5a 100644
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--- a/bin/dig/host.docbook
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+++ b/bin/dig/host.docbook
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@@ -379,7 +379,7 @@
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<command>host</command> appropriately converts character encoding of
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domain name before sending a request to DNS server or displaying a
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reply from the server.
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- If you'd like to turn off the IDN support for some reason, defines
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+ If you'd like to turn off the IDN support for some reason, define
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the <envar>IDN_DISABLE</envar> environment variable.
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The IDN support is disabled if the variable is set when
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<command>host</command> runs.
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diff --git a/bin/dig/nslookup.docbook b/bin/dig/nslookup.docbook
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index d46fc2d..6d7d181 100644
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--- a/bin/dig/nslookup.docbook
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+++ b/bin/dig/nslookup.docbook
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@@ -495,6 +495,21 @@ nslookup -query=hinfo -timeout=10
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</para>
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</refsection>
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+ <refsection><info><title>IDN SUPPORT</title></info>
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+
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+ <para>
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+ If <command>nslookup</command> has been built with IDN (internationalized
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+ domain name) support, it can accept and display non-ASCII domain names.
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+ <command>nslookup</command> appropriately converts character encoding of
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+ domain name before sending a request to DNS server or displaying a
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+ reply from the server.
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+ If you'd like to turn off the IDN support for some reason, define
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+ the <envar>IDN_DISABLE</envar> environment variable.
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+ The IDN support is disabled if the variable is set when
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+ <command>nslookup</command> runs.
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+ </para>
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+ </refsection>
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+
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<refsection><info><title>FILES</title></info>
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<para><filename>/etc/resolv.conf</filename>
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--
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2.20.1
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