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748 lines
21 KiB
C
748 lines
21 KiB
C
/*
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* Copyright (c) 2002 Todd C. Miller <Todd.Miller@courtesan.com>
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*
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* Permission to use, copy, modify, and distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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*
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* Sponsored in part by the Defense Advanced Research Projects
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* Agency (DARPA) and Air Force Research Laboratory, Air Force
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* Materiel Command, USAF, under agreement number F39502-99-1-0512.
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*/
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/*-
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* Copyright (c) 2000 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Dieter Baron and Thomas Klausner.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/** @file
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* @brief Implementations of getopt() and getopt_long() work-alike functions.
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*
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* This code was taken from FreeBSD and slightly modified, mostly to rename
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* symbols with external linkage to avoid naming conflicts in systems where
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* there are real getopt()/getopt_long() implementations, and for portability.
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*/
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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 <redfs.h>
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#include <redgetopt.h>
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#include <redtestutils.h>
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#include <rederrno.h>
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int32_t red_opterr = 1; /* if error message should be printed */
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int32_t red_optind = 1; /* index into parent argv vector */
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int32_t red_optopt = '?'; /* character checked for validity */
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int32_t red_optreset; /* reset RedGetopt */
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const char * red_optarg; /* argument associated with option */
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#define PRINT_ERROR ( ( red_opterr ) && ( *options != ':' ) )
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#define FLAG_PERMUTE 0x01 /* permute non-options to the end of argv */
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#define FLAG_ALLARGS 0x02 /* treat non-options as args to option "-1" */
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#define FLAG_LONGONLY 0x04 /* operate as RedGetoptLongOnly */
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/* return values */
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#define BADCH ( int ) '?'
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#define BADARG ( ( *options == ':' ) ? ( int ) ':' : ( int ) '?' )
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#define INORDER ( int ) 1
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#define EMSG ""
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#define NO_PREFIX ( -1 )
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#define D_PREFIX 0
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#define DD_PREFIX 1
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#define W_PREFIX 2
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static int gcd( int a,
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int b );
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static void permute_args( int panonopt_start,
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int panonopt_end,
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int opt_end,
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char * const * nargv );
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static int parse_long_options( char * const * nargv,
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const char * options,
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const REDOPTION * long_options,
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int32_t * idx,
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int short_too,
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int flags );
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static int getopt_internal( int nargc,
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char * const * nargv,
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const char * options,
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const REDOPTION * long_options,
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int32_t * idx,
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int flags );
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static const char * place = EMSG; /* option letter processing */
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/* XXX: set red_optreset to 1 rather than these two */
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static int nonopt_start = -1; /* first non option argument (for permute) */
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static int nonopt_end = -1; /* first option after non options (for permute) */
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/* Error messages */
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static const char recargchar[] = "option requires an argument -- %c\n";
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static const char illoptchar[] = "illegal option -- %c\n"; /* From P1003.2 */
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static int dash_prefix = NO_PREFIX;
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static const char gnuoptchar[] = "invalid option -- %c\n";
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static const char recargstring[] = "option `%s%s' requires an argument\n";
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static const char ambig[] = "option `%s%s' is ambiguous\n";
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static const char noarg[] = "option `%s%s' doesn't allow an argument\n";
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static const char illoptstring[] = "unrecognized option `%s%s'\n";
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/*
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* Compute the greatest common divisor of a and b.
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*/
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static int gcd( int a,
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int b )
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{
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int c;
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c = a % b;
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while( c != 0 )
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{
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a = b;
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b = c;
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c = a % b;
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}
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return( b );
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}
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/*
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* Exchange the block from nonopt_start to nonopt_end with the block
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* from nonopt_end to opt_end (keeping the same order of arguments
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* in each block).
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*/
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static void permute_args( int panonopt_start,
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int panonopt_end,
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int opt_end,
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char * const * nargv )
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{
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int cstart, cyclelen, i, j, ncycle, nnonopts, nopts, pos;
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char * swap;
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/*
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* compute lengths of blocks and number and size of cycles
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*/
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nnonopts = panonopt_end - panonopt_start;
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nopts = opt_end - panonopt_end;
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ncycle = gcd( nnonopts, nopts );
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cyclelen = ( opt_end - panonopt_start ) / ncycle;
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for( i = 0; i < ncycle; i++ )
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{
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cstart = panonopt_end + i;
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pos = cstart;
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for( j = 0; j < cyclelen; j++ )
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{
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if( pos >= panonopt_end )
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{
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pos -= nnonopts;
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}
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else
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{
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pos += nopts;
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}
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swap = nargv[ pos ];
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( ( char ** ) nargv )[ pos ] = nargv[ cstart ];
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( ( char ** ) nargv )[ cstart ] = swap;
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}
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}
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}
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/*
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* parse_long_options --
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* Parse long options in argc/argv argument vector.
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* Returns -1 if short_too is set and the option does not match long_options.
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*/
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static int parse_long_options( char * const * nargv,
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const char * options,
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const REDOPTION * long_options,
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int32_t * idx,
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int short_too,
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int flags )
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{
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const char * current_argv, * has_equal, * current_dash;
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size_t current_argv_len;
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int i, match, exact_match, second_partial_match;
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current_argv = place;
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switch( dash_prefix )
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{
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case D_PREFIX:
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current_dash = "-";
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break;
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case DD_PREFIX:
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current_dash = "--";
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break;
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case W_PREFIX:
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current_dash = "-W ";
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break;
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default:
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current_dash = "";
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break;
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}
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match = -1;
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exact_match = 0;
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second_partial_match = 0;
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red_optind++;
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if( ( has_equal = strchr( current_argv, '=' ) ) != NULL )
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{
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/* argument found (--option=arg) */
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current_argv_len = has_equal - current_argv;
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has_equal++;
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}
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else
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{
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current_argv_len = strlen( current_argv );
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}
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for( i = 0; long_options[ i ].name; i++ )
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{
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/* find matching long option */
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if( strncmp( current_argv, long_options[ i ].name,
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current_argv_len ) )
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{
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continue;
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}
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if( strlen( long_options[ i ].name ) == current_argv_len )
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{
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/* exact match */
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match = i;
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exact_match = 1;
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break;
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}
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/*
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* If this is a known short option, don't allow
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* a partial match of a single character.
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*/
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if( short_too && ( current_argv_len == 1 ) )
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{
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continue;
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}
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if( match == -1 ) /* first partial match */
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{
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match = i;
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}
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else if( ( flags & FLAG_LONGONLY ) ||
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( long_options[ i ].has_arg !=
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long_options[ match ].has_arg ) ||
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( long_options[ i ].flag != long_options[ match ].flag ) ||
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( long_options[ i ].val != long_options[ match ].val ) )
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{
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second_partial_match = 1;
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}
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}
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if( !exact_match && second_partial_match )
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{
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/* ambiguous abbreviation */
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if( PRINT_ERROR )
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{
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fprintf( stderr,
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ambig,
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current_dash,
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current_argv );
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}
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red_optopt = 0;
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return( BADCH );
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}
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if( match != -1 ) /* option found */
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{
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if( ( long_options[ match ].has_arg == red_no_argument ) &&
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has_equal )
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{
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if( PRINT_ERROR )
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{
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fprintf( stderr,
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noarg,
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current_dash,
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current_argv );
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}
|
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|
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/*
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* XXX: GNU sets red_optopt to val regardless of flag
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*/
|
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if( long_options[ match ].flag == NULL )
|
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{
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red_optopt = long_options[ match ].val;
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}
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else
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{
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red_optopt = 0;
|
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}
|
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|
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return( BADCH );
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}
|
|
|
|
if( ( long_options[ match ].has_arg == red_required_argument ) ||
|
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( long_options[ match ].has_arg == red_optional_argument ) )
|
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{
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if( has_equal )
|
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{
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red_optarg = has_equal;
|
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}
|
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else if( long_options[ match ].has_arg ==
|
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red_required_argument )
|
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{
|
|
/*
|
|
* optional argument doesn't use next nargv
|
|
*/
|
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red_optarg = nargv[ red_optind++ ];
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}
|
|
}
|
|
|
|
if( ( long_options[ match ].has_arg == red_required_argument ) &&
|
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( red_optarg == NULL ) )
|
|
{
|
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/*
|
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* Missing argument; leading ':' indicates no error
|
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* should be generated.
|
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*/
|
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if( PRINT_ERROR )
|
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{
|
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fprintf( stderr,
|
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recargstring,
|
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current_dash,
|
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current_argv );
|
|
}
|
|
|
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/*
|
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* XXX: GNU sets red_optopt to val regardless of flag
|
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*/
|
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if( long_options[ match ].flag == NULL )
|
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{
|
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red_optopt = long_options[ match ].val;
|
|
}
|
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else
|
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{
|
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red_optopt = 0;
|
|
}
|
|
|
|
--red_optind;
|
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return( BADARG );
|
|
}
|
|
}
|
|
else /* unknown option */
|
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{
|
|
if( short_too )
|
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{
|
|
--red_optind;
|
|
return( -1 );
|
|
}
|
|
|
|
if( PRINT_ERROR )
|
|
{
|
|
fprintf( stderr,
|
|
illoptstring,
|
|
current_dash,
|
|
current_argv );
|
|
}
|
|
|
|
red_optopt = 0;
|
|
return( BADCH );
|
|
}
|
|
|
|
if( idx )
|
|
{
|
|
*idx = match;
|
|
}
|
|
|
|
if( long_options[ match ].flag )
|
|
{
|
|
*long_options[ match ].flag = long_options[ match ].val;
|
|
return( 0 );
|
|
}
|
|
else
|
|
{
|
|
return( long_options[ match ].val );
|
|
}
|
|
}
|
|
|
|
/*
|
|
* getopt_internal --
|
|
* Parse argc/argv argument vector. Called by user level routines.
|
|
*/
|
|
static int getopt_internal( int nargc,
|
|
char * const * nargv,
|
|
const char * options,
|
|
const REDOPTION * long_options,
|
|
int32_t * idx,
|
|
int flags )
|
|
{
|
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char * oli; /* option letter list index */
|
|
int optchar, short_too;
|
|
|
|
if( options == NULL )
|
|
{
|
|
return( -1 );
|
|
}
|
|
|
|
/*
|
|
* XXX Some GNU programs (like cvs) set red_optind to 0 instead of
|
|
* XXX using red_optreset. Work around this braindamage.
|
|
*/
|
|
if( red_optind == 0 )
|
|
{
|
|
red_optind = red_optreset = 1;
|
|
}
|
|
|
|
/*
|
|
* Disable GNU extensions if options string begins with a '+'.
|
|
*/
|
|
if( *options == '-' )
|
|
{
|
|
flags |= FLAG_ALLARGS;
|
|
}
|
|
else if( *options == '+' )
|
|
{
|
|
flags &= ~FLAG_PERMUTE;
|
|
}
|
|
|
|
if( ( *options == '+' ) || ( *options == '-' ) )
|
|
{
|
|
options++;
|
|
}
|
|
|
|
red_optarg = NULL;
|
|
|
|
if( red_optreset )
|
|
{
|
|
nonopt_start = nonopt_end = -1;
|
|
}
|
|
|
|
start:
|
|
|
|
if( red_optreset || !*place ) /* update scanning pointer */
|
|
{
|
|
red_optreset = 0;
|
|
|
|
if( red_optind >= nargc ) /* end of argument vector */
|
|
{
|
|
place = EMSG;
|
|
|
|
if( nonopt_end != -1 )
|
|
{
|
|
/* do permutation, if we have to */
|
|
permute_args( nonopt_start, nonopt_end,
|
|
red_optind, nargv );
|
|
red_optind -= nonopt_end - nonopt_start;
|
|
}
|
|
else if( nonopt_start != -1 )
|
|
{
|
|
/*
|
|
* If we skipped non-options, set red_optind
|
|
* to the first of them.
|
|
*/
|
|
red_optind = nonopt_start;
|
|
}
|
|
|
|
nonopt_start = nonopt_end = -1;
|
|
return( -1 );
|
|
}
|
|
|
|
if( ( *( place = nargv[ red_optind ] ) != '-' ) || ( place[ 1 ] == '\0' ) )
|
|
{
|
|
place = EMSG; /* found non-option */
|
|
|
|
if( flags & FLAG_ALLARGS )
|
|
{
|
|
/*
|
|
* GNU extension:
|
|
* return non-option as argument to option 1
|
|
*/
|
|
red_optarg = nargv[ red_optind++ ];
|
|
return( INORDER );
|
|
}
|
|
|
|
if( !( flags & FLAG_PERMUTE ) )
|
|
{
|
|
/*
|
|
* If no permutation wanted, stop parsing
|
|
* at first non-option.
|
|
*/
|
|
return( -1 );
|
|
}
|
|
|
|
/* do permutation */
|
|
if( nonopt_start == -1 )
|
|
{
|
|
nonopt_start = red_optind;
|
|
}
|
|
else if( nonopt_end != -1 )
|
|
{
|
|
permute_args( nonopt_start, nonopt_end,
|
|
red_optind, nargv );
|
|
nonopt_start = red_optind -
|
|
( nonopt_end - nonopt_start );
|
|
nonopt_end = -1;
|
|
}
|
|
|
|
red_optind++;
|
|
/* process next argument */
|
|
goto start;
|
|
}
|
|
|
|
if( ( nonopt_start != -1 ) && ( nonopt_end == -1 ) )
|
|
{
|
|
nonopt_end = red_optind;
|
|
}
|
|
|
|
/*
|
|
* If we have "-" do nothing, if "--" we are done.
|
|
*/
|
|
if( ( place[ 1 ] != '\0' ) && ( *++place == '-' ) && ( place[ 1 ] == '\0' ) )
|
|
{
|
|
red_optind++;
|
|
place = EMSG;
|
|
|
|
/*
|
|
* We found an option (--), so if we skipped
|
|
* non-options, we have to permute.
|
|
*/
|
|
if( nonopt_end != -1 )
|
|
{
|
|
permute_args( nonopt_start, nonopt_end,
|
|
red_optind, nargv );
|
|
red_optind -= nonopt_end - nonopt_start;
|
|
}
|
|
|
|
nonopt_start = nonopt_end = -1;
|
|
return( -1 );
|
|
}
|
|
}
|
|
|
|
/*
|
|
* Check long options if:
|
|
* 1) we were passed some
|
|
* 2) the arg is not just "-"
|
|
* 3) either the arg starts with -- we are RedGetoptLongOnly()
|
|
*/
|
|
if( ( long_options != NULL ) && ( place != nargv[ red_optind ] ) &&
|
|
( ( *place == '-' ) || ( flags & FLAG_LONGONLY ) ) )
|
|
{
|
|
short_too = 0;
|
|
dash_prefix = D_PREFIX;
|
|
|
|
if( *place == '-' )
|
|
{
|
|
place++; /* --foo long option */
|
|
dash_prefix = DD_PREFIX;
|
|
}
|
|
else if( ( *place != ':' ) && ( strchr( options, *place ) != NULL ) )
|
|
{
|
|
short_too = 1; /* could be short option too */
|
|
}
|
|
|
|
optchar = parse_long_options( nargv, options, long_options,
|
|
idx, short_too, flags );
|
|
|
|
if( optchar != -1 )
|
|
{
|
|
place = EMSG;
|
|
return( optchar );
|
|
}
|
|
}
|
|
|
|
if( ( ( optchar = ( int ) *place++ ) == ( int ) ':' ) ||
|
|
( ( optchar == ( int ) '-' ) && ( *place != '\0' ) ) ||
|
|
( ( oli = strchr( options, optchar ) ) == NULL ) )
|
|
{
|
|
/*
|
|
* If the user specified "-" and '-' isn't listed in
|
|
* options, return -1 (non-option) as per POSIX.
|
|
* Otherwise, it is an unknown option character (or ':').
|
|
*/
|
|
if( ( optchar == ( int ) '-' ) && ( *place == '\0' ) )
|
|
{
|
|
return( -1 );
|
|
}
|
|
|
|
if( !*place )
|
|
{
|
|
++red_optind;
|
|
}
|
|
|
|
if( PRINT_ERROR )
|
|
{
|
|
fprintf( stderr, gnuoptchar, optchar );
|
|
}
|
|
|
|
red_optopt = optchar;
|
|
return( BADCH );
|
|
}
|
|
|
|
if( ( long_options != NULL ) && ( optchar == 'W' ) && ( oli[ 1 ] == ';' ) )
|
|
{
|
|
/* -W long-option */
|
|
if( *place ) /* no space */
|
|
{ /* NOTHING */
|
|
}
|
|
else if( ++red_optind >= nargc ) /* no arg */
|
|
{
|
|
place = EMSG;
|
|
|
|
if( PRINT_ERROR )
|
|
{
|
|
fprintf( stderr, recargchar, optchar );
|
|
}
|
|
|
|
red_optopt = optchar;
|
|
return( BADARG );
|
|
}
|
|
else /* white space */
|
|
{
|
|
place = nargv[ red_optind ];
|
|
}
|
|
|
|
dash_prefix = W_PREFIX;
|
|
optchar = parse_long_options( nargv, options, long_options,
|
|
idx, 0, flags );
|
|
place = EMSG;
|
|
return( optchar );
|
|
}
|
|
|
|
if( *++oli != ':' ) /* doesn't take argument */
|
|
{
|
|
if( !*place )
|
|
{
|
|
++red_optind;
|
|
}
|
|
}
|
|
else /* takes (optional) argument */
|
|
{
|
|
red_optarg = NULL;
|
|
|
|
if( *place ) /* no white space */
|
|
{
|
|
red_optarg = place;
|
|
}
|
|
else if( oli[ 1 ] != ':' ) /* arg not optional */
|
|
{
|
|
if( ++red_optind >= nargc ) /* no arg */
|
|
{
|
|
place = EMSG;
|
|
|
|
if( PRINT_ERROR )
|
|
{
|
|
fprintf( stderr, recargchar, optchar );
|
|
}
|
|
|
|
red_optopt = optchar;
|
|
return( BADARG );
|
|
}
|
|
else
|
|
{
|
|
red_optarg = nargv[ red_optind ];
|
|
}
|
|
}
|
|
|
|
place = EMSG;
|
|
++red_optind;
|
|
}
|
|
|
|
/* dump back option letter */
|
|
return( optchar );
|
|
}
|
|
|
|
|
|
/** @brief Get option character from command line argument list.
|
|
*
|
|
* For more details, consult the getopt() man pages, since this function is
|
|
* generally similar.
|
|
*
|
|
* @param nargc Number of arguments (argc passed into main()).
|
|
* @param nargv Argument vector (argv passed into main()).
|
|
* @param options String of option characters.
|
|
*
|
|
* @return The next known option character in @p options. If a character not
|
|
* found in @p options is found or if an option is missing an argument,
|
|
* it returns '?'. Returns -1 when the argument list is exhausted.
|
|
*/
|
|
int32_t RedGetopt( int32_t nargc,
|
|
char * const * nargv,
|
|
const char * options )
|
|
{
|
|
return getopt_internal( nargc, nargv, options, NULL, NULL, FLAG_PERMUTE );
|
|
}
|
|
|
|
|
|
/** @brief Get long options from command line argument list.
|
|
*
|
|
* For more details, consult the getopt_long() man pages, since this function
|
|
* is generally similar.
|
|
*
|
|
* @param nargc Number of arguments (argc passed into main()).
|
|
* @param nargv Argument vector (argv passed into main()).
|
|
* @param options String of option characters.
|
|
* @param long_options The long options; the last element of this array must be
|
|
* filled with zeroes.
|
|
* @param idx If non-NULL, then populated with the index of the long
|
|
* option relative to @p long_options.
|
|
*
|
|
* @return If the flag field in REDOPTION is NULL, returns the value specified
|
|
* in the val field, which is usually just the corresponding short
|
|
* option. If flag is non-NULL, returns zero and stores val in the
|
|
* location pointed to by flag. Returns ':' if an option was missing
|
|
* its argument, '?' for an unknown option, and -1 when the argument
|
|
* list is exhausted.
|
|
*/
|
|
int32_t RedGetoptLong( int32_t nargc,
|
|
char * const * nargv,
|
|
const char * options,
|
|
const REDOPTION * long_options,
|
|
int32_t * idx )
|
|
{
|
|
return getopt_internal( nargc, nargv, options, long_options, idx, FLAG_PERMUTE );
|
|
}
|