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