From: Petr Menšík <pemensik@redhat.com>
Date: Thu, 16 Oct 2025 19:42:28 +0000 (+0200)
Subject: Print built-in hints via named -H
X-Git-Url: http://git.ipfire.org/gitweb/?a=commitdiff_plain;h=a8d9aec96fea7cf32c5459e5bca3bbb13ec8960a;p=thirdparty%2Fbind9.git

Print built-in hints via named -H

Built-ins from libdns were not easily accessible from command line.
---

diff --git a/bin/named/include/named/main.h b/bin/named/include/named/main.h
index 7cf35e0a212..71ef4c14e42 100644
--- a/bin/named/include/named/main.h
+++ b/bin/named/include/named/main.h
@@ -24,7 +24,7 @@
 /*
  * Commandline arguments for named;
  */
-#define NAMED_MAIN_ARGS "46A:c:Cd:D:E:fFgL:M:m:n:N:p:sS:t:T:U:u:vVx:X:"
+#define NAMED_MAIN_ARGS "46A:c:Cd:D:E:fFgHL:M:m:n:N:p:sS:t:T:U:u:vVx:X:"
 
 ISC_NORETURN void
 named_main_earlyfatal(const char *format, ...) ISC_FORMAT_PRINTF(1, 2);
diff --git a/bin/named/main.c b/bin/named/main.c
index 37b77bc2ed2..1bd04a0ccf4 100644
--- a/bin/named/main.c
+++ b/bin/named/main.c
@@ -52,6 +52,7 @@
 #include <dns/lib.h>
 #include <dns/name.h>
 #include <dns/resolver.h>
+#include <dns/rootns.h>
 #include <dns/view.h>
 
 #include <dlz/dlz_dlopen_driver.h>
@@ -866,6 +867,9 @@ parse_command_line(int argc, char *argv[]) {
 			named_g_logflags = ISC_LOG_PRINTTIME | ISC_LOG_ISO8601 |
 					   ISC_LOG_TZINFO;
 			break;
+		case 'H':
+			printf("%s", dns_rootns_gethints());
+			exit(EXIT_SUCCESS);
 		case 'L':
 			named_g_logfile = isc_commandline_argument;
 			break;
diff --git a/bin/named/named.rst b/bin/named/named.rst
index 8b71a388259..f84270dd124 100644
--- a/bin/named/named.rst
+++ b/bin/named/named.rst
@@ -87,6 +87,10 @@ Options
 
    This option runs the server in the foreground and forces all logging to ``stderr``.
 
+.. option:: -H
+
+   This option prints built-in root servers hints and exits.
+
 .. option:: -L logfile
 
    This option sets the log to the file ``logfile`` by default, instead of the system log.
diff --git a/lib/dns/include/dns/rootns.h b/lib/dns/include/dns/rootns.h
index 574dfe11bf3..622bc727f11 100644
--- a/lib/dns/include/dns/rootns.h
+++ b/lib/dns/include/dns/rootns.h
@@ -20,3 +20,9 @@
 isc_result_t
 dns_rootns_create(isc_mem_t *mctx, dns_rdataclass_t rdclass,
 		  const char *filename, dns_db_t **target);
+
+const char *
+dns_rootns_gethints(void);
+/*%
+ * Get built-in root NS hints
+ */
diff --git a/lib/dns/rootns.c b/lib/dns/rootns.c
index 88d853fff45..c8ba7f6e0b2 100644
--- a/lib/dns/rootns.c
+++ b/lib/dns/rootns.c
@@ -230,3 +230,8 @@ cleanup:
 
 	return result;
 }
+
+const char *
+dns_rootns_gethints(void) {
+	return root_ns;
+}