diff -ur orig.003098/tar-1.19/lib/paxlib.h tar-1.19/lib/paxlib.h
--- orig.003098/tar-1.19/lib/paxlib.h	2007-06-27 15:49:45.000000000 +0200
+++ tar-1.19/lib/paxlib.h	2008-01-08 14:18:36.000000000 +0100
@@ -23,6 +23,7 @@
 
 #include <hash.h>
 #include <inttostr.h>
+extern int quiet_option;
 
 /* Error reporting functions and definitions */
 
@@ -42,7 +43,9 @@
    is zero when the error is not being detected by the system.  */
 
 #define WARN(Args) \
-  error Args
+  do { if (quiet_option<2) error Args ; } while (0)
+#define WARN1(Args) \
+  do { if (quiet_option<1) error Args ; } while (0)
 #define ERROR(Args) \
   (error Args, exit_status = PAXEXIT_FAILURE)
 #define FATAL_ERROR(Args) \
diff -ur orig.003098/tar-1.19/src/common.h tar-1.19/src/common.h
--- orig.003098/tar-1.19/src/common.h	2007-09-26 23:42:25.000000000 +0200
+++ tar-1.19/src/common.h	2008-01-08 14:18:36.000000000 +0100
@@ -235,6 +235,9 @@
    just -1 if such an override should not take place.  */
 GLOBAL uid_t owner_option;
 
+/* Boolean value.  */
+GLOBAL int quiet_option;
+
 GLOBAL bool recursive_unlink_option;
 
 GLOBAL bool read_full_records_option;
diff -ur orig.003098/tar-1.19/src/compare.c tar-1.19/src/compare.c
--- orig.003098/tar-1.19/src/compare.c	2007-08-26 10:56:55.000000000 +0200
+++ tar-1.19/src/compare.c	2008-01-08 14:18:36.000000000 +0100
@@ -200,16 +200,16 @@
     {
       if ((current_stat_info.stat.st_mode & MODE_ALL) !=
 	  (stat_data.st_mode & MODE_ALL))
-	report_difference (&current_stat_info, _("Mode differs"));
+	report_difference (&current_stat_info, (quiet_option) ? NULL : _("Mode differs"));
 
       if (!sys_compare_uid (&stat_data, &current_stat_info.stat))
-	report_difference (&current_stat_info, _("Uid differs"));
+	report_difference (&current_stat_info, (quiet_option) ? NULL : _("Uid differs"));
       if (!sys_compare_gid (&stat_data, &current_stat_info.stat))
-	report_difference (&current_stat_info, _("Gid differs"));
+	report_difference (&current_stat_info, (quiet_option) ? NULL : _("Gid differs"));
 
       if (tar_timespec_cmp (get_stat_mtime (&stat_data),
                             current_stat_info.mtime))
-	report_difference (&current_stat_info, _("Mod time differs"));
+	report_difference (&current_stat_info, (quiet_option) ? NULL : _("Mod time differs"));
       if (current_header->header.typeflag != GNUTYPE_SPARSE
 	  && stat_data.st_size != current_stat_info.stat.st_size)
 	{
@@ -325,7 +325,7 @@
 
   if ((current_stat_info.stat.st_mode & MODE_ALL) !=
       (stat_data.st_mode & MODE_ALL))
-    report_difference (&current_stat_info, _("Mode differs"));
+    report_difference (&current_stat_info, (quiet_option) ? NULL : _("Mode differs"));
 }
 
 static int
diff -ur orig.003098/tar-1.19/src/create.c tar-1.19/src/create.c
--- orig.003098/tar-1.19/src/create.c	2007-10-05 19:46:49.000000000 +0200
+++ tar-1.19/src/create.c	2008-01-08 14:18:36.000000000 +0100
@@ -1734,12 +1734,12 @@
     type = FIFOTYPE;
   else if (S_ISSOCK (st->stat.st_mode))
     {
-      WARN ((0, 0, _("%s: socket ignored"), quotearg_colon (p)));
+      WARN1 ((0, 0, _("%s: socket ignored"), quotearg_colon (p)));
       return;
     }
   else if (S_ISDOOR (st->stat.st_mode))
     {
-      WARN ((0, 0, _("%s: door ignored"), quotearg_colon (p)));
+      WARN1 ((0, 0, _("%s: door ignored"), quotearg_colon (p)));
       return;
     }
   else
diff -ur orig.003098/tar-1.19/src/extract.c tar-1.19/src/extract.c
--- orig.003098/tar-1.19/src/extract.c	2007-08-26 10:56:55.000000000 +0200
+++ tar-1.19/src/extract.c	2008-01-08 14:18:36.000000000 +0100
@@ -195,7 +195,7 @@
 check_time (char const *file_name, struct timespec t)
 {
   if (t.tv_sec <= 0)
-    WARN ((0, 0, _("%s: implausibly old time stamp %s"),
+    WARN1 ((0, 0, _("%s: implausibly old time stamp %s"),
 	   file_name, tartime (t, true)));
   else if (timespec_cmp (volume_start_time, t) < 0)
     {
@@ -212,7 +212,7 @@
 	      diff.tv_nsec += BILLION;
 	      diff.tv_sec--;
 	    }
-	  WARN ((0, 0, _("%s: time stamp %s is %s s in the future"),
+	  WARN1 ((0, 0, _("%s: time stamp %s is %s s in the future"),
 		 file_name, tartime (t, true), code_timespec (diff, buf)));
 	}
     }
diff -ur orig.003098/tar-1.19/src/tar.c tar-1.19/src/tar.c
--- orig.003098/tar-1.19/src/tar.c	2007-09-26 23:36:58.000000000 +0200
+++ tar-1.19/src/tar.c	2008-01-08 14:18:36.000000000 +0100
@@ -490,6 +490,8 @@
       " directories until the end of extraction"), GRID+1 },
   {"no-delay-directory-restore", NO_DELAY_DIRECTORY_RESTORE_OPTION, 0, 0,
    N_("cancel the effect of --delay-directory-restore option"), GRID+1 },
+  {"quiet", 'Q', 0, 0,
+   N_("don't output warnings (2 levels)"), 31 },
 #undef GRID
 
 #define GRID 60
@@ -1389,6 +1391,10 @@
       absolute_names_option = true;
       break;
 
+    case 'Q':
+      quiet_option++;
+      break;
+
     case 'r':
       set_subcommand_option (APPEND_SUBCOMMAND);
       break;