Introduce `show_all_dns_entries'.

NEWS

@@ -65,6 +65,9 @@ Please send GNU Wget bug reports to <bug-wget@gnu.org>.
 
 ** Do not attempt to remove the file if it is not in the accept rules but
    it is the output destination file.
+
+** Introduce `show_all_dns_entries' to print all IP addresses corresponding to
+   a DNS name when it is resolved.
 
 * Changes in Wget 1.12
 

doc/ChangeLog

@@ -1,5 +1,7 @@
 2011-08-06  Giuseppe Scrivano  <gscrivano@gnu.org>
 
+	* wget.texi (Wgetrc Commands): Document show_all_dns_entries.
+
 	* Makefile.am (wget.pod): Pass the VERSION value to texi2pod.
 
 	* texi2pod.pl: Update from GCC.

doc/wget.texi

@@ -3171,6 +3171,10 @@ as @samp{--secure-protocol=@var{string}}.
 Choose whether or not to print the @sc{http} and @sc{ftp} server
 responses---the same as @samp{-S}.
 
+@item show_all_dns_entries = on/off
+When a DNS name is resolved, show all the IP addresses, not just the first
+three.
+
 @item span_hosts = on/off
 Same as @samp{-H}.
 

src/ChangeLog

@@ -1,5 +1,10 @@
 2011-08-06  Giuseppe Scrivano  <gscrivano@gnu.org>
 
+	* host.c (lookup_host): If `showalldnsentries' is used then print all
+	the IP corresponding to a DNS entry.
+	* init.c (commands): Add `showalldnsentries'.
+	Suggested by: Witold Baryluk <baryluk@smp.if.uj.edu.pl>
+
 	* http.c (gethttp): Add the Cache-Control HTTP header when --no-cache
 	is specified.
 	Reported by: Коренберг Марк <socketpair@gmail.com>.

src/host.c

@@ -822,11 +822,15 @@ lookup_host (const char *host, int flags)
 #endif /* not ENABLE_IPV6 */
 
   /* Print the addresses determined by DNS lookup, but no more than
-     three.  */
+     three if show_all_dns_entries is not specified.  */
   if (!silent && !numeric_address)
     {
       int i;
-      int printmax = al->count <= 3 ? al->count : 3;
+      int printmax = al->count;
+
+      if (! opt.show_all_dns_entries)
+        printmax = 3;
+
       for (i = 0; i < printmax; i++)
         {
           logputs (LOG_VERBOSE, print_address (al->addresses + i));

src/init.c

@@ -247,6 +247,7 @@ static const struct {
   { "secureprotocol",   &opt.secure_protocol,   cmd_spec_secure_protocol },
 #endif
   { "serverresponse",   &opt.server_response,   cmd_boolean },
+  { "showalldnsentries", &opt.show_all_dns_entries, cmd_boolean },
   { "spanhosts",        &opt.spanhost,          cmd_boolean },
   { "spider",           &opt.spider,            cmd_boolean },
   { "strictcomments",   &opt.strict_comments,   cmd_boolean },

src/options.h

@@ -253,6 +253,8 @@ struct options
   bool useservertimestamps;  	/* Update downloaded files' timestamps to
 				   match those on server? */
 
+  bool show_all_dns_entries; /* Show all the DNS entries when resolving a
+                                name. */
 };
 
 extern struct options opt;