uniq-dash-l-syslog.diff

--- src/uniq.c.orig	2013-01-30 18:46:24.000000000 -0600
+++ src/uniq.c	2015-02-23 02:30:06.000000000 -0600
@@ -66,6 +66,7 @@
 enum countmode
 {
   count_occurrences,		/* -c Print count before output lines. */
+  count_syslog, 		/* -l Print "last line repeated XX times" */
   count_none			/* Default.  Do not print counts. */
 };
 
@@ -268,6 +269,9 @@
     printf ("%7" PRIuMAX " ", linecount + 1);
 
   fwrite (line->buffer, sizeof (char), line->length, stdout);
+
+  if (countmode == count_syslog && linecount > 0)
+    printf ("*** last line repeated %d times ***\n", linecount);
 }
 
 /* Process input file INFILE with output to OUTFILE.
@@ -443,7 +447,7 @@
       if (optc == -1
           || (posixly_correct && nfiles != 0)
           || ((optc = getopt_long (argc, argv,
-                                   "-0123456789Dcdf:is:uw:z", longopts, NULL))
+                                   "-0123456789Dcdlf:is:uw:z", longopts, NULL))
               == -1))
         {
           if (argc <= optind)
@@ -525,6 +529,10 @@
           ignore_case = true;
           break;
 
+        case 'l':
+          countmode = count_syslog;
+          break;
+
         case 's':
           skip_chars = size_opt (optarg,
                                  N_("invalid number of bytes to skip"));
@@ -552,7 +560,7 @@
         }
     }
 
-  if (countmode == count_occurrences && output_later_repeated)
+  if (countmode != count_none && output_later_repeated)
     {
       error (0, 0,
            _("printing all duplicated lines and repeat counts is meaningless"));