Add new tool dnsdomainname.

ChangeLog

@@ -1,3 +1,17 @@
+2012-03-12  Simon Josefsson  <simon@josefsson.org>
+
+	* NEWS: Mention new dnsdomainname tool.
+	* configure.ac: Add tool dnsdomainname.
+	* doc/inetutils.texi: Document dnsdomainname.
+	* man/Makefile.am: Build dnsdomainname.1.
+	* man/dnsdomainname.h2m: New file.
+	* src/.gitignore: Ignore dnsdomainname.
+	* src/Makefile.am (bin_PROGRAMS): Add $(dnsdomainname_BUILD).
+	(dnsdomainname_SOURCES): New variable.
+	(EXTRA_PROGRAMS): Add dnsdomainname.
+	* src/dnsdomainname.c: New file.
+	* tests/dnsdomainname.sh: New file.
+
 2012-03-10  Mats Erik Andersson  <gnu@gisladisker.se>
 
 	* whois/tld_serv_list (.cz, .fo, .gl, .gs, .hk, .ie, .il, .in, .is)

NEWS

@@ -4,6 +4,9 @@ Copyright (C) 1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005,
 See the end of this file for license conditions.
 
 Please send inetutils bug reports to <bug-inetutils@gnu.org>.
+
+* New tool 'dnsdomainname'.
+
 
 January 6, 2012
 Version 1.9.1:

configure.ac

@@ -104,6 +104,7 @@ IU_ENABLE_SERVER(tftpd)
 IU_ENABLE_SERVER(uucpd)
 
 IU_ENABLE_CLIENT(ftp)
+IU_ENABLE_CLIENT(dnsdomainname)
 IU_ENABLE_CLIENT(hostname)
 IU_ENABLE_CLIENT(ping)
 IU_ENABLE_CLIENT(ping6)

doc/inetutils.texi

@@ -32,6 +32,7 @@
 * ftp: (inetutils)ftp invocation.                 FTP client.
 * ftpd: (inetutils)ftpd invocation.               FTP Daemon.
 * hostname: (inetutils)hostname invocation.       Show or set system host name.
+* dnsdomainname: (inetutils)dnsdomainname invocation.       Show DNS domain name.
 * inetd: (inetutils)inetd invocation.             Interner super-server.
 * logger: (inetutils)logger invocation.           Send messages to the system log.
 * ping: (inetutils)ping invocation.               Packets to network hosts.
@@ -99,6 +100,7 @@ Documentation License''.
 Diagnostic programs
 
 * hostname invocation::                Show or set system host name.
+* dnsdomainname invocation::           Show DNS domain name.
 * logger invocation::                  Send messages to system log.
 * ping invocation::                    Packets to network hosts.
 * traceroute invocation::              Trace the route to a host.
@@ -281,6 +283,19 @@ Get short host name.
 Get NIS/YP domain name.
 @end table
 
+@node dnsdomainname invocation
+@chapter @command{dnsdomainname}: Show DNS domain name
+@cindex dnsdomainname
+
+@command{dnsdomainname} is a program to show the domain part of the
+system's fully qualified domain name.  For example, if the FQDN of the
+system is @code{name.example.org} the command will show
+@code{example.org}.
+
+@example
+dnsdomainname [@var{option}@dots{}]
+@end example
+
 @node logger invocation
 @chapter @command{logger}: Send messages to system log
 @cindex logger

man/Makefile.am

@@ -16,10 +16,10 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see `http://www.gnu.org/licenses/'.
 
-all = hostname.1 ifconfig.1 inetd.8 ftp.1 ftpd.8 logger.1 ping.1	\
-      ping6.1 rcp.1 rexec.1 rexecd.8 rlogin.1 rlogind.8 rsh.1 rshd.8	\
-      syslogd.8 talk.1 talkd.8 telnet.1 telnetd.8 tftp.1 tftpd.8	\
-      traceroute.1 uucpd.8 whois.1
+all = hostname.1 dnsdomainname.1 ifconfig.1 inetd.8 ftp.1 ftpd.8	\
+      logger.1 ping.1 ping6.1 rcp.1 rexec.1 rexecd.8 rlogin.1		\
+      rlogind.8 rsh.1 rshd.8 syslogd.8 talk.1 talkd.8 telnet.1		\
+      telnetd.8 tftp.1 tftpd.8 traceroute.1 uucpd.8 whois.1
 
 dist_man_MANS =
 
@@ -27,6 +27,10 @@ if ENABLE_hostname
 dist_man_MANS += hostname.1
 endif
 
+if ENABLE_dnsdomainname
+dist_man_MANS += dnsdomainname.1
+endif
+
 if ENABLE_ifconfig
 dist_man_MANS += ifconfig.1
 endif
@@ -133,6 +137,8 @@ ftpd.8: ftpd.h2m $(top_srcdir)/ftpd/ftpd.c $(top_srcdir)/configure.ac
 
 hostname.1: hostname.h2m $(top_srcdir)/src/hostname.c $(top_srcdir)/configure.ac
 
+dnsdomainname.1: dnsdomainname.h2m $(top_srcdir)/src/dnsdomainname.c $(top_srcdir)/configure.ac
+
 ifconfig.1: ifconfig.h2m $(top_srcdir)/ifconfig/options.c $(top_srcdir)/configure.ac
 
 inetd.8: inetd.h2m $(top_srcdir)/src/inetd.c $(top_srcdir)/configure.ac
@@ -186,6 +192,7 @@ whois.1: whois.h2m $(top_srcdir)/whois/whois.c $(top_srcdir)/configure.ac
 mapped_name = `echo ../$(TOOL)/$(TOOL) \
 | sed s,../ping6/ping6,../ping/ping6,\
 | sed s,../hostname/hostname,../src/hostname,\
+| sed s,../dnsdomainname/dnsdomainname,../src/dnsdomainname,\
 | sed s,../inetd/inetd,../src/inetd,\
 | sed s,../logger/logger,../src/logger,\
 | sed s,../rcp/rcp,../src/rcp,\

man/dnsdomainname.h2m

@@ -0,0 +1,2 @@
+[NAME]
+dnsdomainname \- show DNS domain name

src/.gitignore

@@ -1,3 +1,4 @@
+dnsdomainname
 hostname
 inetd
 logger

src/Makefile.am

@@ -32,6 +32,10 @@ bin_PROGRAMS += $(hostname_BUILD)
 hostname_SOURCES = hostname.c
 EXTRA_PROGRAMS += hostname
 
+bin_PROGRAMS += $(dnsdomainname_BUILD)
+dnsdomainname_SOURCES = dnsdomainname.c
+EXTRA_PROGRAMS += dnsdomainname
+
 bin_PROGRAMS += $(logger_BUILD)
 logger_SOURCES = logger.c logprio.h
 EXTRA_PROGRAMS += logger

src/dnsdomainname.c

@@ -0,0 +1,82 @@
+/*
+  Copyright (C) 2012 Free Software Foundation, Inc.
+
+  This file is part of GNU Inetutils.
+
+  GNU Inetutils is free software: you can redistribute it and/or modify
+  it under the terms of the GNU General Public License as published by
+  the Free Software Foundation, either version 3 of the License, or (at
+  your option) any later version.
+
+  GNU Inetutils is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+  General Public License for more details.
+
+  You should have received a copy of the GNU General Public License
+  along with this program.  If not, see `http://www.gnu.org/licenses/'. */
+
+#include <config.h>
+
+#include <argp.h>
+#include <error.h>
+#include <stdlib.h>
+#include <string.h>
+#include <stdio.h>
+#include <netdb.h>
+
+#include "libinetutils.h"
+#include "progname.h"
+#include "xgethostname.h"
+
+const char doc[] =
+  "Show domain part of the system's fully qualified domain name.";
+const char *program_authors[] = {
+  "Simon Josefsson",
+  NULL
+};
+
+static struct argp argp = { NULL, NULL, NULL, doc };
+
+void
+dnsdomainname (void)
+{
+  char *host_name;
+  struct addrinfo hints, *res;
+  const char *dn;
+  int rc;
+
+  host_name = xgethostname ();
+  if (!host_name)
+    error (EXIT_FAILURE, errno, "cannot determine host name");
+
+  memset (&hints, 0, sizeof (struct addrinfo));
+  hints.ai_flags = AI_CANONNAME;
+
+  rc = getaddrinfo (host_name, NULL, &hints, &res);
+  if (rc != 0)
+    error (EXIT_FAILURE, 0, "%s", gai_strerror (rc));
+
+  dn = strchr (res->ai_canonname, '.');
+  if (dn == NULL)
+    error (EXIT_FAILURE, 0, "cannot qualify host name: %s", host_name);
+  dn++;
+
+  puts (dn);
+
+  free (host_name);
+  freeaddrinfo (res);
+}
+
+int
+main (int argc, char *argv[])
+{
+  set_program_name (argv[0]);
+
+  iu_argp_init ("dnsdomainname", program_authors);
+  argp_parse (&argp, argc, argv, 0, NULL, NULL);
+
+  dnsdomainname ();
+
+  exit (EXIT_SUCCESS);
+}

tests/Makefile.am

@@ -64,6 +64,10 @@ if ENABLE_hostname
 dist_check_SCRIPTS += hostname.sh
 endif
 
+if ENABLE_dnsdomainname
+dist_check_SCRIPTS += dnsdomainname.sh
+endif
+
 TESTS = $(check_PROGRAMS) $(dist_check_SCRIPTS)
 
 TESTS_ENVIRONMENT = EXEEXT=$(EXEEXT)

tests/dnsdomainname.sh

@@ -0,0 +1,50 @@
+#!/bin/sh
+
+# Copyright (C) 2012 Free Software Foundation, Inc.
+#
+# This file is part of GNU Inetutils.
+#
+# GNU Inetutils is free software: you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or (at
+# your option) any later version.
+#
+# GNU Inetutils is distributed in the hope that it will be useful, but
+# WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+# General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see `http://www.gnu.org/licenses/'.
+
+set -e
+
+DNSDOMAINNAME=${DNSDOMAINNAME:-../src/dnsdomainname$EXEEXT}
+
+if ! test -x $DNSDOMAINNAME; then
+    echo "No executable $DNSDOMAINNAME available.  Skipping test."
+    exit 77
+fi
+
+$DNSDOMAINNAME > /dev/null
+rc=$?
+if test $rc -ne 0; then
+    echo "invoking $DNSDOMAINNAME failed with error code $rc"
+    exit 1
+fi
+
+$DNSDOMAINNAME --version > /dev/null
+rc=$?
+if test $rc -ne 0; then
+    echo "invoking $DNSDOMAINNAME --version failed with error code $rc"
+    exit 1
+fi
+
+$DNSDOMAINNAME --help > /dev/null
+rc=$?
+if test $rc -ne 0; then
+    echo "invoking $DNSDOMAINNAME --help failed with error code $rc"
+    exit 1
+fi
+
+exit 0