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- /* Replacement for getopt() that can be used by tar.
- Copyright (C) 1988 Free Software Foundation
-
- This file is part of GNU Tar.
-
- GNU Tar is free software; you can redistribute it and/or modify
- it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2, or (at your option)
- any later version.
-
- GNU Tar is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
-
- You should have received a copy of the GNU General Public License
- along with GNU Tar; see the file COPYING. If not, write to
- the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */
-
- /*
- * Plug-compatible replacement for getopt() for parsing tar-like
- * arguments. If the first argument begins with "-", it uses getopt;
- * otherwise, it uses the old rules used by tar, dump, and ps.
- *
- * Written 25 August 1985 by John Gilmore (ihnp4!hoptoad!gnu)
- */
-
- #include <stdio.h>
- #include "getopt.h"
- #include "tar.h" /* For msg() declaration if STDC_MSG. */
- #include <sys/types.h>
- #include "port.h"
-
- int
- getoldopt (argc, argv, optstring, long_options, opt_index)
- int argc;
- char **argv;
- char *optstring;
- struct option *long_options;
- int *opt_index;
- {
- extern char *optarg; /* Points to next arg */
- extern int optind; /* Global argv index */
- static char *key; /* Points to next keyletter */
- static char use_getopt; /* !=0 if argv[1][0] was '-' */
- char c;
- char *place;
-
- optarg = NULL;
-
- if (key == NULL)
- { /* First time */
- if (argc < 2)
- return EOF;
- key = argv[1];
- if ((*key == '-') || (*key == '+'))
- use_getopt++;
- else
- optind = 2;
- }
-
- if (use_getopt)
- return getopt_long (argc, argv, optstring,
- long_options, opt_index);
-
- c = *key++;
- if (c == '\0')
- {
- key--;
- return EOF;
- }
- place = index (optstring, c);
-
- if (place == NULL || c == ':')
- {
- msg ("unknown option %c", c);
- return ('?');
- }
-
- place++;
- if (*place == ':')
- {
- if (optind < argc)
- {
- optarg = argv[optind];
- optind++;
- }
- else
- {
- msg ("%c argument missing", c);
- return ('?');
- }
- }
-
- return (c);
- }
-