New option: --all-repeated (-D).

(output_all_repeated) [output_mode]: New enum value.
(usage): Describe it.
(writeline): Test for new mode.
(check_file): Likewise.
Based on patches from Jochen Hein and Florin Iucha.
(main): Diagnose `too many arguments'.

diff --git a/src/uniq.c b/src/uniq.c
index 509c0315f6d37f7ac937851a6bd47f881bcee979..ddc14141650b77d84d4c090435774d3ba783320e 100644 (file)
--- a/src/uniq.c
+++ b/src/uniq.c
@@ -1,5 +1,5 @@
 /* uniq -- remove duplicate lines from a sorted file
-   Copyright (C) 86, 91, 95, 96, 1997, 1998 Free Software Foundation, Inc.
+   Copyright (C) 86, 91, 95, 96, 1997, 1998, 1999 Free Software Foundation, Inc.
 
    This program is free software; you can redistribute it and/or modify
    it under the terms of the GNU General Public License as published by
@@ -58,6 +58,7 @@ static enum countmode countmode;
 enum output_mode
 {
   output_repeated,             /* -d Only lines that are repeated. */
+  output_all_repeated,         /* -D All lines that are repeated. */
   output_unique,               /* -u Only lines that are not repeated. */
   output_all                   /* Default.  Print first copy of each line. */
 };
@@ -78,6 +79,7 @@ static struct option const longopts[] =
 {
   {"count", no_argument, NULL, 'c'},
   {"repeated", no_argument, NULL, 'd'},
+  {"all-repeated", no_argument, NULL, 'D'},
   {"ignore-case", no_argument, NULL, 'i'},
   {"unique", no_argument, NULL, 'u'},
   {"skip-fields", required_argument, NULL, 'f'},
@@ -106,6 +108,7 @@ standard input), writing to OUTPUT (or standard output).\n\
 \n\
   -c, --count           prefix lines by the number of occurrences\n\
   -d, --repeated        only print duplicate lines\n\
+  -D, --all-repeated    print all duplicate lines\n\
   -f, --skip-fields=N   avoid comparing the first N fields\n\
   -i, --ignore-case     ignore differences in case when comparing\n\
   -s, --skip-chars=N    avoid comparing the first N characters\n\
@@ -189,7 +192,8 @@ static void
 writeline (const struct linebuffer *line, FILE *stream, int linecount)
 {
   if ((mode == output_unique && linecount != 0)
-      || (mode == output_repeated && linecount == 0))
+      || (mode == output_repeated && linecount == 0)
+      || (mode == output_all_repeated && linecount == 0))
     return;
 
   if (countmode == count_occurrences)
@@ -244,18 +248,21 @@ check_file (const char *infile, const char *outfile)
        break;
       thisfield = find_field (thisline);
       thislen = thisline->length - (thisfield - thisline->buffer);
-      if (!different (thisfield, prevfield, thislen, prevlen))
-       match_count++;
-      else
+      match = !different (thisfield, prevfield, thislen, prevlen);
+
+      if (match)
+       ++match_count;
+
+      if (!match || mode == output_all_repeated)
        {
          writeline (prevline, ostream, match_count);
-         match_count = 0;
-
          exch = prevline;
          prevline = thisline;
          thisline = exch;
          prevfield = thisfield;
          prevlen = thislen;
+         if (!match)
+           match_count = 0;
        }
     }
 
@@ -289,7 +296,7 @@ main (int argc, char **argv)
   mode = output_all;
   countmode = count_none;
 
-  while ((optc = getopt_long (argc, argv, "0123456789cdf:is:uw:", longopts,
+  while ((optc = getopt_long (argc, argv, "0123456789cdDf:is:uw:", longopts,
                              NULL)) != -1)
     {
       switch (optc)
@@ -318,6 +325,10 @@ main (int argc, char **argv)
          mode = output_repeated;
          break;
 
+       case 'D':
+         mode = output_all_repeated;
+         break;
+
        case 'f':               /* Like '-#'. */
          {
            long int tmp_long;
@@ -400,7 +411,17 @@ main (int argc, char **argv)
     outfile = argv[optind++];
 
   if (optind < argc)
-    usage (1);                 /* Extra arguments. */
+    {
+      error (0, 0, _("too many arguments"));
+      usage (1);
+    }
+
+  if (countmode == count_occurrences && mode == output_all_repeated)
+    {
+      error (0, 0,
+          _("printing all duplicated lines and repeat counts is meaningless"));
+      usage (1);
+    }
 
   check_file (infile, outfile);