811 lines
24 KiB
C
811 lines
24 KiB
C
/* Getopt for GNU.
|
||
Copyright (C) 1987-2022 Free Software Foundation, Inc.
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This file is part of the GNU C Library and is also part of gnulib.
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Patches to this file should be submitted to both projects.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
|
||
License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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||
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||
The GNU C Library 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 GNU
|
||
Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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||
License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#ifndef _LIBC
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# include <config.h>
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#endif
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#include "getopt.h"
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#ifdef _LIBC
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/* When used as part of glibc, error printing must be done differently
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for standards compliance. getopt is not a cancellation point, so
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it must not call functions that are, and it is specified by an
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older standard than stdio locking, so it must not refer to
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functions in the "user namespace" related to stdio locking.
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Finally, it must use glibc's internal message translation so that
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the messages are looked up in the proper text domain. */
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# include <libintl.h>
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# define fprintf __fxprintf_nocancel
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# define flockfile(fp) _IO_flockfile (fp)
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# define funlockfile(fp) _IO_funlockfile (fp)
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#else
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# include "gettext.h"
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# define _(msgid) gettext (msgid)
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/* When used standalone, flockfile and funlockfile might not be
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available. */
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# ifndef _POSIX_THREAD_SAFE_FUNCTIONS
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# define flockfile(fp) /* nop */
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# define funlockfile(fp) /* nop */
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# endif
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/* When used standalone, do not attempt to use alloca. */
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# define __libc_use_alloca(size) 0
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# undef alloca
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# define alloca(size) (abort (), (void *)0)
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#endif
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/* This implementation of 'getopt' has three modes for handling
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options interspersed with non-option arguments. It can stop
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scanning for options at the first non-option argument encountered,
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as POSIX specifies. It can continue scanning for options after the
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first non-option argument, but permute 'argv' as it goes so that,
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after 'getopt' is done, all the options precede all the non-option
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arguments and 'optind' points to the first non-option argument.
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Or, it can report non-option arguments as if they were arguments to
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the option character '\x01'.
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The default behavior of 'getopt_long' is to permute the argument list.
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When this implementation is used standalone, the default behavior of
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'getopt' is to stop at the first non-option argument, but when it is
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used as part of GNU libc it also permutes the argument list. In both
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cases, setting the environment variable POSIXLY_CORRECT to any value
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disables permutation.
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If the first character of the OPTSTRING argument to 'getopt' or
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'getopt_long' is '+', both functions will stop at the first
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non-option argument. If it is '-', both functions will report
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non-option arguments as arguments to the option character '\x01'. */
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#include "getopt_int.h"
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/* For communication from 'getopt' to the caller.
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When 'getopt' finds an option that takes an argument,
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the argument value is returned here.
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Also, when 'ordering' is RETURN_IN_ORDER,
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each non-option ARGV-element is returned here. */
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char *optarg;
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/* Index in ARGV of the next element to be scanned.
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This is used for communication to and from the caller
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and for communication between successive calls to 'getopt'.
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On entry to 'getopt', zero means this is the first call; initialize.
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When 'getopt' returns -1, this is the index of the first of the
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non-option elements that the caller should itself scan.
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Otherwise, 'optind' communicates from one call to the next
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how much of ARGV has been scanned so far. */
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/* 1003.2 says this must be 1 before any call. */
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int optind = 1;
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/* Callers store zero here to inhibit the error message
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for unrecognized options. */
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int opterr = 1;
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/* Set to an option character which was unrecognized.
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This must be initialized on some systems to avoid linking in the
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system's own getopt implementation. */
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int optopt = '?';
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/* Keep a global copy of all internal members of getopt_data. */
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static struct _getopt_data getopt_data;
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/* Exchange two adjacent subsequences of ARGV.
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One subsequence is elements [first_nonopt,last_nonopt)
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which contains all the non-options that have been skipped so far.
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The other is elements [last_nonopt,optind), which contains all
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the options processed since those non-options were skipped.
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'first_nonopt' and 'last_nonopt' are relocated so that they describe
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the new indices of the non-options in ARGV after they are moved. */
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static void
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exchange (char **argv, struct _getopt_data *d)
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{
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int bottom = d->__first_nonopt;
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int middle = d->__last_nonopt;
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int top = d->optind;
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char *tem;
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/* Exchange the shorter segment with the far end of the longer segment.
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That puts the shorter segment into the right place.
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It leaves the longer segment in the right place overall,
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but it consists of two parts that need to be swapped next. */
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while (top > middle && middle > bottom)
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{
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if (top - middle > middle - bottom)
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{
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/* Bottom segment is the short one. */
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int len = middle - bottom;
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int i;
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/* Swap it with the top part of the top segment. */
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for (i = 0; i < len; i++)
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{
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tem = argv[bottom + i];
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argv[bottom + i] = argv[top - (middle - bottom) + i];
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argv[top - (middle - bottom) + i] = tem;
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}
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/* Exclude the moved bottom segment from further swapping. */
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top -= len;
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}
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else
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{
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/* Top segment is the short one. */
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int len = top - middle;
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int i;
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/* Swap it with the bottom part of the bottom segment. */
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for (i = 0; i < len; i++)
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{
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tem = argv[bottom + i];
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argv[bottom + i] = argv[middle + i];
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argv[middle + i] = tem;
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}
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/* Exclude the moved top segment from further swapping. */
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bottom += len;
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}
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}
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/* Update records for the slots the non-options now occupy. */
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d->__first_nonopt += (d->optind - d->__last_nonopt);
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d->__last_nonopt = d->optind;
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}
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/* Process the argument starting with d->__nextchar as a long option.
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d->optind should *not* have been advanced over this argument.
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If the value returned is -1, it was not actually a long option, the
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state is unchanged, and the argument should be processed as a set
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of short options (this can only happen when long_only is true).
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Otherwise, the option (and its argument, if any) have been consumed
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and the return value is the value to return from _getopt_internal_r. */
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static int
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process_long_option (int argc, char **argv, const char *optstring,
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const struct option *longopts, int *longind,
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int long_only, struct _getopt_data *d,
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int print_errors, const char *prefix)
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{
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char *nameend;
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size_t namelen;
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const struct option *p;
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const struct option *pfound = NULL;
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int n_options;
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int option_index;
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for (nameend = d->__nextchar; *nameend && *nameend != '='; nameend++)
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/* Do nothing. */ ;
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namelen = nameend - d->__nextchar;
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/* First look for an exact match, counting the options as a side
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effect. */
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for (p = longopts, n_options = 0; p->name; p++, n_options++)
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if (!strncmp (p->name, d->__nextchar, namelen)
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&& namelen == strlen (p->name))
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{
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/* Exact match found. */
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pfound = p;
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option_index = n_options;
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break;
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}
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if (pfound == NULL)
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{
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/* Didn't find an exact match, so look for abbreviations. */
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unsigned char *ambig_set = NULL;
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int ambig_malloced = 0;
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int ambig_fallback = 0;
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int indfound = -1;
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for (p = longopts, option_index = 0; p->name; p++, option_index++)
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if (!strncmp (p->name, d->__nextchar, namelen))
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{
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if (pfound == NULL)
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{
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/* First nonexact match found. */
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pfound = p;
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indfound = option_index;
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}
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else if (long_only
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|| pfound->has_arg != p->has_arg
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|| pfound->flag != p->flag
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|| pfound->val != p->val)
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{
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/* Second or later nonexact match found. */
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if (!ambig_fallback)
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{
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if (!print_errors)
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/* Don't waste effort tracking the ambig set if
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we're not going to print it anyway. */
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ambig_fallback = 1;
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else if (!ambig_set)
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{
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if (__libc_use_alloca (n_options))
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ambig_set = alloca (n_options);
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else if ((ambig_set = malloc (n_options)) == NULL)
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/* Fall back to simpler error message. */
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ambig_fallback = 1;
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else
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ambig_malloced = 1;
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if (ambig_set)
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{
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memset (ambig_set, 0, n_options);
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ambig_set[indfound] = 1;
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}
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}
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if (ambig_set)
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ambig_set[option_index] = 1;
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}
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}
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}
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if (ambig_set || ambig_fallback)
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{
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if (print_errors)
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{
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if (ambig_fallback)
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fprintf (stderr, _("%s: option '%s%s' is ambiguous\n"),
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argv[0], prefix, d->__nextchar);
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else
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{
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flockfile (stderr);
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fprintf (stderr,
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_("%s: option '%s%s' is ambiguous; possibilities:"),
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argv[0], prefix, d->__nextchar);
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for (option_index = 0; option_index < n_options; option_index++)
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if (ambig_set[option_index])
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fprintf (stderr, " '%s%s'",
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prefix, longopts[option_index].name);
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/* This must use 'fprintf' even though it's only
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printing a single character, so that it goes through
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__fxprintf_nocancel when compiled as part of glibc. */
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fprintf (stderr, "\n");
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funlockfile (stderr);
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}
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}
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if (ambig_malloced)
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free (ambig_set);
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d->__nextchar += strlen (d->__nextchar);
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d->optind++;
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d->optopt = 0;
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return '?';
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}
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option_index = indfound;
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}
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if (pfound == NULL)
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{
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/* Can't find it as a long option. If this is not getopt_long_only,
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or the option starts with '--' or is not a valid short option,
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then it's an error. */
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if (!long_only || argv[d->optind][1] == '-'
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|| strchr (optstring, *d->__nextchar) == NULL)
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{
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if (print_errors)
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fprintf (stderr, _("%s: unrecognized option '%s%s'\n"),
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argv[0], prefix, d->__nextchar);
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d->__nextchar = NULL;
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d->optind++;
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d->optopt = 0;
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return '?';
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}
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|
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/* Otherwise interpret it as a short option. */
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return -1;
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}
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/* We have found a matching long option. Consume it. */
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d->optind++;
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d->__nextchar = NULL;
|
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if (*nameend)
|
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{
|
||
/* Don't test has_arg with >, because some C compilers don't
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allow it to be used on enums. */
|
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if (pfound->has_arg)
|
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d->optarg = nameend + 1;
|
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else
|
||
{
|
||
if (print_errors)
|
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fprintf (stderr,
|
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_("%s: option '%s%s' doesn't allow an argument\n"),
|
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argv[0], prefix, pfound->name);
|
||
|
||
d->optopt = pfound->val;
|
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return '?';
|
||
}
|
||
}
|
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else if (pfound->has_arg == 1)
|
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{
|
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if (d->optind < argc)
|
||
d->optarg = argv[d->optind++];
|
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else
|
||
{
|
||
if (print_errors)
|
||
fprintf (stderr,
|
||
_("%s: option '%s%s' requires an argument\n"),
|
||
argv[0], prefix, pfound->name);
|
||
|
||
d->optopt = pfound->val;
|
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return optstring[0] == ':' ? ':' : '?';
|
||
}
|
||
}
|
||
|
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if (longind != NULL)
|
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*longind = option_index;
|
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if (pfound->flag)
|
||
{
|
||
*(pfound->flag) = pfound->val;
|
||
return 0;
|
||
}
|
||
return pfound->val;
|
||
}
|
||
|
||
/* Initialize internal data upon the first call to getopt. */
|
||
|
||
static const char *
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_getopt_initialize (int argc _GL_UNUSED,
|
||
char **argv _GL_UNUSED, const char *optstring,
|
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struct _getopt_data *d, int posixly_correct)
|
||
{
|
||
/* Start processing options with ARGV-element 1 (since ARGV-element 0
|
||
is the program name); the sequence of previously skipped
|
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non-option ARGV-elements is empty. */
|
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if (d->optind == 0)
|
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d->optind = 1;
|
||
|
||
d->__first_nonopt = d->__last_nonopt = d->optind;
|
||
d->__nextchar = NULL;
|
||
|
||
/* Determine how to handle the ordering of options and nonoptions. */
|
||
if (optstring[0] == '-')
|
||
{
|
||
d->__ordering = RETURN_IN_ORDER;
|
||
++optstring;
|
||
}
|
||
else if (optstring[0] == '+')
|
||
{
|
||
d->__ordering = REQUIRE_ORDER;
|
||
++optstring;
|
||
}
|
||
else if (posixly_correct || !!getenv ("POSIXLY_CORRECT"))
|
||
d->__ordering = REQUIRE_ORDER;
|
||
else
|
||
d->__ordering = PERMUTE;
|
||
|
||
d->__initialized = 1;
|
||
return optstring;
|
||
}
|
||
|
||
/* Scan elements of ARGV (whose length is ARGC) for option characters
|
||
given in OPTSTRING.
|
||
|
||
If an element of ARGV starts with '-', and is not exactly "-" or "--",
|
||
then it is an option element. The characters of this element
|
||
(aside from the initial '-') are option characters. If 'getopt'
|
||
is called repeatedly, it returns successively each of the option characters
|
||
from each of the option elements.
|
||
|
||
If 'getopt' finds another option character, it returns that character,
|
||
updating 'optind' and 'nextchar' so that the next call to 'getopt' can
|
||
resume the scan with the following option character or ARGV-element.
|
||
|
||
If there are no more option characters, 'getopt' returns -1.
|
||
Then 'optind' is the index in ARGV of the first ARGV-element
|
||
that is not an option. (The ARGV-elements have been permuted
|
||
so that those that are not options now come last.)
|
||
|
||
OPTSTRING is a string containing the legitimate option characters.
|
||
If an option character is seen that is not listed in OPTSTRING,
|
||
return '?' after printing an error message. If you set 'opterr' to
|
||
zero, the error message is suppressed but we still return '?'.
|
||
|
||
If a char in OPTSTRING is followed by a colon, that means it wants an arg,
|
||
so the following text in the same ARGV-element, or the text of the following
|
||
ARGV-element, is returned in 'optarg'. Two colons mean an option that
|
||
wants an optional arg; if there is text in the current ARGV-element,
|
||
it is returned in 'optarg', otherwise 'optarg' is set to zero.
|
||
|
||
If OPTSTRING starts with '-' or '+', it requests different methods of
|
||
handling the non-option ARGV-elements.
|
||
See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above.
|
||
|
||
Long-named options begin with '--' instead of '-'.
|
||
Their names may be abbreviated as long as the abbreviation is unique
|
||
or is an exact match for some defined option. If they have an
|
||
argument, it follows the option name in the same ARGV-element, separated
|
||
from the option name by a '=', or else the in next ARGV-element.
|
||
When 'getopt' finds a long-named option, it returns 0 if that option's
|
||
'flag' field is nonzero, the value of the option's 'val' field
|
||
if the 'flag' field is zero.
|
||
|
||
The elements of ARGV aren't really const, because we permute them.
|
||
But we pretend they're const in the prototype to be compatible
|
||
with other systems.
|
||
|
||
LONGOPTS is a vector of 'struct option' terminated by an
|
||
element containing a name which is zero.
|
||
|
||
LONGIND returns the index in LONGOPT of the long-named option found.
|
||
It is only valid when a long-named option has been found by the most
|
||
recent call.
|
||
|
||
If LONG_ONLY is nonzero, '-' as well as '--' can introduce
|
||
long-named options. */
|
||
|
||
int
|
||
_getopt_internal_r (int argc, char **argv, const char *optstring,
|
||
const struct option *longopts, int *longind,
|
||
int long_only, struct _getopt_data *d, int posixly_correct)
|
||
{
|
||
int print_errors = d->opterr;
|
||
|
||
if (argc < 1)
|
||
return -1;
|
||
|
||
d->optarg = NULL;
|
||
|
||
if (d->optind == 0 || !d->__initialized)
|
||
optstring = _getopt_initialize (argc, argv, optstring, d, posixly_correct);
|
||
else if (optstring[0] == '-' || optstring[0] == '+')
|
||
optstring++;
|
||
|
||
if (optstring[0] == ':')
|
||
print_errors = 0;
|
||
|
||
/* Test whether ARGV[optind] points to a non-option argument. */
|
||
#define NONOPTION_P (argv[d->optind][0] != '-' || argv[d->optind][1] == '\0')
|
||
|
||
if (d->__nextchar == NULL || *d->__nextchar == '\0')
|
||
{
|
||
/* Advance to the next ARGV-element. */
|
||
|
||
/* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been
|
||
moved back by the user (who may also have changed the arguments). */
|
||
if (d->__last_nonopt > d->optind)
|
||
d->__last_nonopt = d->optind;
|
||
if (d->__first_nonopt > d->optind)
|
||
d->__first_nonopt = d->optind;
|
||
|
||
if (d->__ordering == PERMUTE)
|
||
{
|
||
/* If we have just processed some options following some non-options,
|
||
exchange them so that the options come first. */
|
||
|
||
if (d->__first_nonopt != d->__last_nonopt
|
||
&& d->__last_nonopt != d->optind)
|
||
exchange (argv, d);
|
||
else if (d->__last_nonopt != d->optind)
|
||
d->__first_nonopt = d->optind;
|
||
|
||
/* Skip any additional non-options
|
||
and extend the range of non-options previously skipped. */
|
||
|
||
while (d->optind < argc && NONOPTION_P)
|
||
d->optind++;
|
||
d->__last_nonopt = d->optind;
|
||
}
|
||
|
||
/* The special ARGV-element '--' means premature end of options.
|
||
Skip it like a null option,
|
||
then exchange with previous non-options as if it were an option,
|
||
then skip everything else like a non-option. */
|
||
|
||
if (d->optind != argc && !strcmp (argv[d->optind], "--"))
|
||
{
|
||
d->optind++;
|
||
|
||
if (d->__first_nonopt != d->__last_nonopt
|
||
&& d->__last_nonopt != d->optind)
|
||
exchange (argv, d);
|
||
else if (d->__first_nonopt == d->__last_nonopt)
|
||
d->__first_nonopt = d->optind;
|
||
d->__last_nonopt = argc;
|
||
|
||
d->optind = argc;
|
||
}
|
||
|
||
/* If we have done all the ARGV-elements, stop the scan
|
||
and back over any non-options that we skipped and permuted. */
|
||
|
||
if (d->optind == argc)
|
||
{
|
||
/* Set the next-arg-index to point at the non-options
|
||
that we previously skipped, so the caller will digest them. */
|
||
if (d->__first_nonopt != d->__last_nonopt)
|
||
d->optind = d->__first_nonopt;
|
||
return -1;
|
||
}
|
||
|
||
/* If we have come to a non-option and did not permute it,
|
||
either stop the scan or describe it to the caller and pass it by. */
|
||
|
||
if (NONOPTION_P)
|
||
{
|
||
if (d->__ordering == REQUIRE_ORDER)
|
||
return -1;
|
||
d->optarg = argv[d->optind++];
|
||
return 1;
|
||
}
|
||
|
||
/* We have found another option-ARGV-element.
|
||
Check whether it might be a long option. */
|
||
if (longopts)
|
||
{
|
||
if (argv[d->optind][1] == '-')
|
||
{
|
||
/* "--foo" is always a long option. The special option
|
||
"--" was handled above. */
|
||
d->__nextchar = argv[d->optind] + 2;
|
||
return process_long_option (argc, argv, optstring, longopts,
|
||
longind, long_only, d,
|
||
print_errors, "--");
|
||
}
|
||
|
||
/* If long_only and the ARGV-element has the form "-f",
|
||
where f is a valid short option, don't consider it an
|
||
abbreviated form of a long option that starts with f.
|
||
Otherwise there would be no way to give the -f short
|
||
option.
|
||
|
||
On the other hand, if there's a long option "fubar" and
|
||
the ARGV-element is "-fu", do consider that an
|
||
abbreviation of the long option, just like "--fu", and
|
||
not "-f" with arg "u".
|
||
|
||
This distinction seems to be the most useful approach. */
|
||
if (long_only && (argv[d->optind][2]
|
||
|| !strchr (optstring, argv[d->optind][1])))
|
||
{
|
||
int code;
|
||
d->__nextchar = argv[d->optind] + 1;
|
||
code = process_long_option (argc, argv, optstring, longopts,
|
||
longind, long_only, d,
|
||
print_errors, "-");
|
||
if (code != -1)
|
||
return code;
|
||
}
|
||
}
|
||
|
||
/* It is not a long option. Skip the initial punctuation. */
|
||
d->__nextchar = argv[d->optind] + 1;
|
||
}
|
||
|
||
/* Look at and handle the next short option-character. */
|
||
|
||
{
|
||
char c = *d->__nextchar++;
|
||
const char *temp = strchr (optstring, c);
|
||
|
||
/* Increment 'optind' when we start to process its last character. */
|
||
if (*d->__nextchar == '\0')
|
||
++d->optind;
|
||
|
||
if (temp == NULL || c == ':' || c == ';')
|
||
{
|
||
if (print_errors)
|
||
fprintf (stderr, _("%s: invalid option -- '%c'\n"), argv[0], c);
|
||
d->optopt = c;
|
||
return '?';
|
||
}
|
||
|
||
/* Convenience. Treat POSIX -W foo same as long option --foo */
|
||
if (temp[0] == 'W' && temp[1] == ';' && longopts != NULL)
|
||
{
|
||
/* This is an option that requires an argument. */
|
||
if (*d->__nextchar != '\0')
|
||
d->optarg = d->__nextchar;
|
||
else if (d->optind == argc)
|
||
{
|
||
if (print_errors)
|
||
fprintf (stderr,
|
||
_("%s: option requires an argument -- '%c'\n"),
|
||
argv[0], c);
|
||
|
||
d->optopt = c;
|
||
if (optstring[0] == ':')
|
||
c = ':';
|
||
else
|
||
c = '?';
|
||
return c;
|
||
}
|
||
else
|
||
d->optarg = argv[d->optind];
|
||
|
||
d->__nextchar = d->optarg;
|
||
d->optarg = NULL;
|
||
return process_long_option (argc, argv, optstring, longopts, longind,
|
||
0 /* long_only */, d, print_errors, "-W ");
|
||
}
|
||
if (temp[1] == ':')
|
||
{
|
||
if (temp[2] == ':')
|
||
{
|
||
/* This is an option that accepts an argument optionally. */
|
||
if (*d->__nextchar != '\0')
|
||
{
|
||
d->optarg = d->__nextchar;
|
||
d->optind++;
|
||
}
|
||
else
|
||
d->optarg = NULL;
|
||
d->__nextchar = NULL;
|
||
}
|
||
else
|
||
{
|
||
/* This is an option that requires an argument. */
|
||
if (*d->__nextchar != '\0')
|
||
{
|
||
d->optarg = d->__nextchar;
|
||
/* If we end this ARGV-element by taking the rest as an arg,
|
||
we must advance to the next element now. */
|
||
d->optind++;
|
||
}
|
||
else if (d->optind == argc)
|
||
{
|
||
if (print_errors)
|
||
fprintf (stderr,
|
||
_("%s: option requires an argument -- '%c'\n"),
|
||
argv[0], c);
|
||
|
||
d->optopt = c;
|
||
if (optstring[0] == ':')
|
||
c = ':';
|
||
else
|
||
c = '?';
|
||
}
|
||
else
|
||
/* We already incremented 'optind' once;
|
||
increment it again when taking next ARGV-elt as argument. */
|
||
d->optarg = argv[d->optind++];
|
||
d->__nextchar = NULL;
|
||
}
|
||
}
|
||
return c;
|
||
}
|
||
}
|
||
|
||
int
|
||
_getopt_internal (int argc, char **argv, const char *optstring,
|
||
const struct option *longopts, int *longind, int long_only,
|
||
int posixly_correct)
|
||
{
|
||
int result;
|
||
|
||
getopt_data.optind = optind;
|
||
getopt_data.opterr = opterr;
|
||
|
||
result = _getopt_internal_r (argc, argv, optstring, longopts,
|
||
longind, long_only, &getopt_data,
|
||
posixly_correct);
|
||
|
||
optind = getopt_data.optind;
|
||
optarg = getopt_data.optarg;
|
||
optopt = getopt_data.optopt;
|
||
|
||
return result;
|
||
}
|
||
|
||
/* glibc gets a LSB-compliant getopt and a POSIX-complaint __posix_getopt.
|
||
Standalone applications just get a POSIX-compliant getopt.
|
||
POSIX and LSB both require these functions to take 'char *const *argv'
|
||
even though this is incorrect (because of the permutation). */
|
||
#define GETOPT_ENTRY(NAME, POSIXLY_CORRECT) \
|
||
int \
|
||
NAME (int argc, char *const *argv, const char *optstring) \
|
||
{ \
|
||
return _getopt_internal (argc, (char **)argv, optstring, \
|
||
0, 0, 0, POSIXLY_CORRECT); \
|
||
}
|
||
|
||
#ifdef _LIBC
|
||
GETOPT_ENTRY(getopt, 0)
|
||
GETOPT_ENTRY(__posix_getopt, 1)
|
||
#else
|
||
GETOPT_ENTRY(getopt, 1)
|
||
#endif
|
||
|
||
|
||
#ifdef TEST
|
||
|
||
/* Compile with -DTEST to make an executable for use in testing
|
||
the above definition of 'getopt'. */
|
||
|
||
int
|
||
main (int argc, char **argv)
|
||
{
|
||
int c;
|
||
int digit_optind = 0;
|
||
|
||
while (1)
|
||
{
|
||
int this_option_optind = optind ? optind : 1;
|
||
|
||
c = getopt (argc, argv, "abc:d:0123456789");
|
||
if (c == -1)
|
||
break;
|
||
|
||
switch (c)
|
||
{
|
||
case '0':
|
||
case '1':
|
||
case '2':
|
||
case '3':
|
||
case '4':
|
||
case '5':
|
||
case '6':
|
||
case '7':
|
||
case '8':
|
||
case '9':
|
||
if (digit_optind != 0 && digit_optind != this_option_optind)
|
||
printf ("digits occur in two different argv-elements.\n");
|
||
digit_optind = this_option_optind;
|
||
printf ("option %c\n", c);
|
||
break;
|
||
|
||
case 'a':
|
||
printf ("option a\n");
|
||
break;
|
||
|
||
case 'b':
|
||
printf ("option b\n");
|
||
break;
|
||
|
||
case 'c':
|
||
printf ("option c with value '%s'\n", optarg);
|
||
break;
|
||
|
||
case '?':
|
||
break;
|
||
|
||
default:
|
||
printf ("?? getopt returned character code 0%o ??\n", c);
|
||
}
|
||
}
|
||
|
||
if (optind < argc)
|
||
{
|
||
printf ("non-option ARGV-elements: ");
|
||
while (optind < argc)
|
||
printf ("%s ", argv[optind++]);
|
||
printf ("\n");
|
||
}
|
||
|
||
exit (0);
|
||
}
|
||
|
||
#endif /* TEST */
|