Add support for POSIX 1003.1-2001, which requires removal for

support of obsolete "+" option syntax in sort, tail, and uniq.

(usage, main): Implement this.

diff --git a/src/sort.c b/src/sort.c
index 5294227..6baf40f 100644 (file)
--- a/src/sort.c
+++ b/src/sort.c
@@ -1,5 +1,5 @@
 /* sort - sort lines of text (with all kinds of options).
-   Copyright (C) 88, 1991-2001 Free Software Foundation, Inc.
+   Copyright (C) 88, 1991-2002 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
@@ -327,16 +327,18 @@ Other options:\n\
 "), DEFAULT_TMPDIR);
       fputs (_("\
   -z, --zero-terminated     end lines with 0 byte, not newline\n\
+"), stdout);
+      if (POSIX2_VERSION < 200112)
+       fputs (_("\
   +POS1 [-POS2]             start a key at POS1, end it before POS2 (origin 0)\n\
-                              Warning: this option is obsolescent\n\
+                              Warning: this option is obsolete\n\
 "), stdout);
       fputs (HELP_OPTION_DESCRIPTION, stdout);
       fputs (VERSION_OPTION_DESCRIPTION, stdout);
       fputs (_("\
 \n\
 POS is F[.C][OPTS], where F is the field number and C the character position\n\
-in the field, both counted from one with -k, from zero with the obsolescent\n\
-form.  OPTS is made up of one or more single-letter ordering options, which\n\
+in the field.  OPTS is one or more single-letter ordering options, which\n\
 override global ordering options for that key.  If no key is given, use the\n\
 entire line as the key.\n\
 \n\
@@ -2249,14 +2251,14 @@ main (int argc, char **argv)
   for (;;)
     {
       /* Parse an operand as a file after "--" was seen; or if
-         pedantic and a file was seen, unless -c was not seen and the
-         operand is "-o FILE" or "-oFILE".  POSIX 1003.1-200x d5
-         removes the exception for the -o options; when it becomes
-         official the code will need to be changed.  */
+         pedantic and a file was seen, unless the POSIX version
+         predates 1003.1-2001 and -c was not seen and the operand is
+         "-o FILE" or "-oFILE".  */
 
       if (c == -1
          || (posix_pedantic && nfiles != 0
-             && ! (! checkonly
+             && ! (POSIX2_VERSION < 200112
+                   && ! checkonly
                    && optind != argc
                    && argv[optind][0] == '-' && argv[optind][1] == 'o'
                    && (argv[optind][2] || optind + 1 != argc)))
@@ -2272,14 +2274,11 @@ main (int argc, char **argv)
       else switch (c)
        {
        case 1:
-         /* Treat +POS1 [-POS2] as a key if possible; but silently
-            treat an operand as a file if it is not a valid +POS1.
-            POSIX 1003.1-200x d5 does not allow support for +POS1, so
-            when it becomes official this code will need to be
-            changed.  */
          key = NULL;
-         if (optarg[0] == '+')
+         if (POSIX2_VERSION < 200112 && optarg[0] == '+')
            {
+             /* Treat +POS1 [-POS2] as a key if possible; but silently
+                treat an operand as a file if it is not a valid +POS1.  */
              key = new_key ();
              s = parse_field_count (optarg + 1, &key->sword, NULL);
              if (s && *s == '.')