1 | /**************************************** |
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2 | * Computer Algebra System SINGULAR * |
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3 | ****************************************/ |
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4 | /* $Id: getopt.c,v 1.2 1998-04-17 07:53:41 Singular Exp $ */ |
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5 | |
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6 | /* Getopt for GNU. |
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7 | NOTE: getopt is now part of the C library, so if you don't know what |
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8 | "Keep this file name-space clean" means, talk to roland@gnu.ai.mit.edu |
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9 | before changing it! |
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10 | |
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11 | Copyright (C) 1987, 88, 89, 90, 91, 92, 93, 94 |
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12 | Free Software Foundation, Inc. |
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13 | |
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14 | This program is free software; you can redistribute it and/or modify it |
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15 | under the terms of the GNU General Public License as published by the |
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16 | Free Software Foundation; either version 2, or (at your option) any |
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17 | later version. |
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18 | |
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19 | This program is distributed in the hope that it will be useful, |
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20 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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21 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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22 | GNU General Public License for more details. |
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23 | |
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24 | You should have received a copy of the GNU General Public License |
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25 | along with this program; if not, write to the Free Software |
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26 | Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ |
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27 | |
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28 | /* adapted for use with Singular by obachman@mathematik.uni-kl.de 4/98*/ |
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29 | |
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30 | |
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31 | #include "mod2.h" |
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32 | |
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33 | #ifndef __STDC__ |
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34 | # ifndef const |
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35 | # define const |
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36 | # endif |
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37 | #endif |
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38 | |
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39 | /* This tells Alpha OSF/1 not to define a getopt prototype in <stdio.h>. */ |
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40 | #ifndef _NO_PROTO |
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41 | #define _NO_PROTO |
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42 | #endif |
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43 | |
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44 | #include <stdio.h> |
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45 | /* #include "tailor.h" */ |
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46 | |
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47 | /* Comment out all this code if we are using the GNU C Library, and are not |
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48 | actually compiling the library itself. This code is part of the GNU C |
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49 | Library, but also included in many other GNU distributions. Compiling |
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50 | and linking in this code is a waste when using the GNU C library |
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51 | (especially if it is a shared library). Rather than having every GNU |
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52 | program understand `configure --with-gnu-libc' and omit the object files, |
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53 | it is simpler to just do this in the source for each such file. */ |
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54 | |
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55 | #if defined (_LIBC) || !defined (__GNU_LIBRARY__) |
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56 | |
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57 | |
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58 | /* This needs to come after some library #include |
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59 | to get __GNU_LIBRARY__ defined. */ |
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60 | #ifdef __GNU_LIBRARY__ |
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61 | /* Don't include stdlib.h for non-GNU C libraries because some of them |
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62 | contain conflicting prototypes for getopt. */ |
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63 | #include <stdlib.h> |
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64 | #endif /* GNU C library. */ |
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65 | |
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66 | /* If GETOPT_COMPAT is defined, `+' as well as `--' can introduce a |
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67 | long-named option. Because this is not POSIX.2 compliant, it is |
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68 | being phased out. */ |
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69 | /* #define GETOPT_COMPAT */ |
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70 | |
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71 | /* This version of `getopt' appears to the caller like standard Unix `getopt' |
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72 | but it behaves differently for the user, since it allows the user |
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73 | to intersperse the options with the other arguments. |
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74 | |
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75 | As `getopt' works, it permutes the elements of ARGV so that, |
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76 | when it is done, all the options precede everything else. Thus |
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77 | all application programs are extended to handle flexible argument order. |
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78 | |
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79 | Setting the environment variable POSIXLY_CORRECT disables permutation. |
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80 | Then the behavior is completely standard. |
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81 | |
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82 | GNU application programs can use a third alternative mode in which |
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83 | they can distinguish the relative order of options and other arguments. */ |
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84 | |
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85 | #include "getopt.h" |
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86 | |
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87 | /* For communication from `getopt' to the caller. |
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88 | When `getopt' finds an option that takes an argument, |
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89 | the argument value is returned here. |
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90 | Also, when `ordering' is RETURN_IN_ORDER, |
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91 | each non-option ARGV-element is returned here. */ |
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92 | |
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93 | char *optarg = 0; |
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94 | |
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95 | /* Index in ARGV of the next element to be scanned. |
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96 | This is used for communication to and from the caller |
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97 | and for communication between successive calls to `getopt'. |
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98 | |
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99 | On entry to `getopt', zero means this is the first call; initialize. |
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100 | |
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101 | When `getopt' returns EOF, this is the index of the first of the |
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102 | non-option elements that the caller should itself scan. |
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103 | |
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104 | Otherwise, `optind' communicates from one call to the next |
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105 | how much of ARGV has been scanned so far. */ |
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106 | |
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107 | /* XXX 1003.2 says this must be 1 before any call. */ |
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108 | int optind = 0; |
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109 | |
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110 | /* The next char to be scanned in the option-element |
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111 | in which the last option character we returned was found. |
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112 | This allows us to pick up the scan where we left off. |
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113 | |
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114 | If this is zero, or a null string, it means resume the scan |
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115 | by advancing to the next ARGV-element. */ |
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116 | |
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117 | static char *nextchar; |
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118 | |
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119 | /* Callers store zero here to inhibit the error message |
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120 | for unrecognized options. */ |
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121 | |
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122 | int opterr = 1; |
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123 | |
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124 | /* Set to an option character which was unrecognized. |
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125 | This must be initialized on some systems to avoid linking in the |
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126 | system's own getopt implementation. */ |
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127 | |
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128 | #define BAD_OPTION '\0' |
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129 | int optopt = BAD_OPTION; |
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130 | |
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131 | /* Describe how to deal with options that follow non-option ARGV-elements. |
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132 | |
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133 | If the caller did not specify anything, |
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134 | the default is REQUIRE_ORDER if the environment variable |
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135 | POSIXLY_CORRECT is defined, PERMUTE otherwise. |
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136 | |
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137 | REQUIRE_ORDER means don't recognize them as options; |
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138 | stop option processing when the first non-option is seen. |
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139 | This is what Unix does. |
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140 | This mode of operation is selected by either setting the environment |
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141 | variable POSIXLY_CORRECT, or using `+' as the first character |
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142 | of the list of option characters. |
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143 | |
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144 | PERMUTE is the default. We permute the contents of ARGV as we scan, |
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145 | so that eventually all the non-options are at the end. This allows options |
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146 | to be given in any order, even with programs that were not written to |
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147 | expect this. |
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148 | |
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149 | RETURN_IN_ORDER is an option available to programs that were written |
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150 | to expect options and other ARGV-elements in any order and that care about |
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151 | the ordering of the two. We describe each non-option ARGV-element |
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152 | as if it were the argument of an option with character code 1. |
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153 | Using `-' as the first character of the list of option characters |
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154 | selects this mode of operation. |
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155 | |
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156 | The special argument `--' forces an end of option-scanning regardless |
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157 | of the value of `ordering'. In the case of RETURN_IN_ORDER, only |
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158 | `--' can cause `getopt' to return EOF with `optind' != ARGC. */ |
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159 | |
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160 | static enum |
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161 | { |
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162 | REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER |
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163 | } ordering; |
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164 | |
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165 | #ifdef __GNU_LIBRARY__ |
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166 | /* We want to avoid inclusion of string.h with non-GNU libraries |
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167 | because there are many ways it can cause trouble. |
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168 | On some systems, it contains special magic macros that don't work |
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169 | in GCC. */ |
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170 | #include <string.h> |
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171 | #define my_index strchr |
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172 | #define my_strlen strlen |
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173 | #else |
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174 | |
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175 | /* Avoid depending on library functions or files |
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176 | whose names are inconsistent. */ |
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177 | |
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178 | #if __STDC__ || defined(PROTO) |
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179 | extern char *getenv(const char *name); |
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180 | extern int strcmp (const char *s1, const char *s2); |
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181 | extern int strncmp(const char *s1, const char *s2, int n); |
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182 | |
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183 | static int my_strlen(const char *s); |
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184 | static char *my_index (const char *str, int chr); |
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185 | #else |
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186 | extern char *getenv (); |
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187 | #endif |
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188 | |
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189 | static int |
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190 | my_strlen (str) |
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191 | const char *str; |
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192 | { |
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193 | int n = 0; |
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194 | while (*str++) |
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195 | n++; |
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196 | return n; |
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197 | } |
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198 | |
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199 | static char * |
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200 | my_index (str, chr) |
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201 | const char *str; |
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202 | int chr; |
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203 | { |
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204 | while (*str) |
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205 | { |
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206 | if (*str == chr) |
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207 | return (char *) str; |
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208 | str++; |
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209 | } |
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210 | return 0; |
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211 | } |
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212 | |
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213 | #endif /* GNU C library. */ |
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214 | |
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215 | /* Handle permutation of arguments. */ |
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216 | |
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217 | /* Describe the part of ARGV that contains non-options that have |
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218 | been skipped. `first_nonopt' is the index in ARGV of the first of them; |
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219 | `last_nonopt' is the index after the last of them. */ |
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220 | |
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221 | static int first_nonopt; |
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222 | static int last_nonopt; |
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223 | |
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224 | /* Exchange two adjacent subsequences of ARGV. |
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225 | One subsequence is elements [first_nonopt,last_nonopt) |
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226 | which contains all the non-options that have been skipped so far. |
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227 | The other is elements [last_nonopt,optind), which contains all |
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228 | the options processed since those non-options were skipped. |
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229 | |
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230 | `first_nonopt' and `last_nonopt' are relocated so that they describe |
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231 | the new indices of the non-options in ARGV after they are moved. |
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232 | |
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233 | To perform the swap, we first reverse the order of all elements. So |
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234 | all options now come before all non options, but they are in the |
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235 | wrong order. So we put back the options and non options in original |
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236 | order by reversing them again. For example: |
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237 | original input: a b c -x -y |
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238 | reverse all: -y -x c b a |
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239 | reverse options: -x -y c b a |
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240 | reverse non options: -x -y a b c |
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241 | */ |
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242 | |
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243 | #if __STDC__ || defined(PROTO) |
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244 | static void exchange (char **argv); |
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245 | #endif |
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246 | |
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247 | static void |
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248 | exchange (argv) |
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249 | char **argv; |
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250 | { |
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251 | char *temp, **first, **last; |
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252 | |
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253 | /* Reverse all the elements [first_nonopt, optind) */ |
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254 | first = &argv[first_nonopt]; |
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255 | last = &argv[optind-1]; |
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256 | while (first < last) { |
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257 | temp = *first; *first = *last; *last = temp; first++; last--; |
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258 | } |
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259 | /* Put back the options in order */ |
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260 | first = &argv[first_nonopt]; |
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261 | first_nonopt += (optind - last_nonopt); |
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262 | last = &argv[first_nonopt - 1]; |
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263 | while (first < last) { |
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264 | temp = *first; *first = *last; *last = temp; first++; last--; |
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265 | } |
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266 | |
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267 | /* Put back the non options in order */ |
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268 | first = &argv[first_nonopt]; |
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269 | last_nonopt = optind; |
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270 | last = &argv[last_nonopt-1]; |
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271 | while (first < last) { |
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272 | temp = *first; *first = *last; *last = temp; first++; last--; |
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273 | } |
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274 | } |
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275 | |
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276 | /* Scan elements of ARGV (whose length is ARGC) for option characters |
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277 | given in OPTSTRING. |
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278 | |
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279 | If an element of ARGV starts with '-', and is not exactly "-" or "--", |
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280 | then it is an option element. The characters of this element |
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281 | (aside from the initial '-') are option characters. If `getopt' |
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282 | is called repeatedly, it returns successively each of the option characters |
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283 | from each of the option elements. |
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284 | |
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285 | If `getopt' finds another option character, it returns that character, |
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286 | updating `optind' and `nextchar' so that the next call to `getopt' can |
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287 | resume the scan with the following option character or ARGV-element. |
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288 | |
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289 | If there are no more option characters, `getopt' returns `EOF'. |
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290 | Then `optind' is the index in ARGV of the first ARGV-element |
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291 | that is not an option. (The ARGV-elements have been permuted |
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292 | so that those that are not options now come last.) |
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293 | |
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294 | OPTSTRING is a string containing the legitimate option characters. |
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295 | If an option character is seen that is not listed in OPTSTRING, |
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296 | return BAD_OPTION after printing an error message. If you set `opterr' to |
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297 | zero, the error message is suppressed but we still return BAD_OPTION. |
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298 | |
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299 | If a char in OPTSTRING is followed by a colon, that means it wants an arg, |
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300 | so the following text in the same ARGV-element, or the text of the following |
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301 | ARGV-element, is returned in `optarg'. Two colons mean an option that |
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302 | wants an optional arg; if there is text in the current ARGV-element, |
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303 | it is returned in `optarg', otherwise `optarg' is set to zero. |
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304 | |
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305 | If OPTSTRING starts with `-' or `+', it requests different methods of |
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306 | handling the non-option ARGV-elements. |
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307 | See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above. |
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308 | |
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309 | Long-named options begin with `--' instead of `-'. |
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310 | Their names may be abbreviated as long as the abbreviation is unique |
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311 | or is an exact match for some defined option. If they have an |
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312 | argument, it follows the option name in the same ARGV-element, separated |
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313 | from the option name by a `=', or else the in next ARGV-element. |
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314 | When `getopt' finds a long-named option, it returns 0 if that option's |
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315 | `flag' field is nonzero, the value of the option's `val' field |
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316 | if the `flag' field is zero. |
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317 | |
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318 | The elements of ARGV aren't really const, because we permute them. |
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319 | But we pretend they're const in the prototype to be compatible |
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320 | with other systems. |
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321 | |
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322 | LONGOPTS is a vector of `struct option' terminated by an |
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323 | element containing a name which is zero. |
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324 | |
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325 | LONGIND returns the index in LONGOPT of the long-named option found. |
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326 | It is only valid when a long-named option has been found by the most |
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327 | recent call. |
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328 | |
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329 | If LONG_ONLY is nonzero, '-' as well as '--' can introduce |
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330 | long-named options. */ |
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331 | |
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332 | int |
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333 | _getopt_internal (argc, argv, optstring, longopts, longind, long_only) |
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334 | int argc; |
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335 | char *const *argv; |
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336 | const char *optstring; |
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337 | const struct option *longopts; |
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338 | int *longind; |
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339 | int long_only; |
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340 | { |
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341 | int option_index; |
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342 | |
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343 | optarg = 0; |
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344 | |
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345 | /* Initialize the internal data when the first call is made. |
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346 | Start processing options with ARGV-element 1 (since ARGV-element 0 |
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347 | is the program name); the sequence of previously skipped |
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348 | non-option ARGV-elements is empty. */ |
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349 | |
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350 | if (optind == 0) |
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351 | { |
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352 | first_nonopt = last_nonopt = optind = 1; |
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353 | |
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354 | nextchar = NULL; |
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355 | |
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356 | /* Determine how to handle the ordering of options and nonoptions. */ |
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357 | |
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358 | if (optstring[0] == '-') |
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359 | { |
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360 | ordering = RETURN_IN_ORDER; |
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361 | ++optstring; |
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362 | } |
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363 | else if (optstring[0] == '+') |
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364 | { |
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365 | ordering = REQUIRE_ORDER; |
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366 | ++optstring; |
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367 | } |
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368 | else if (getenv ("POSIXLY_CORRECT") != NULL) |
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369 | ordering = REQUIRE_ORDER; |
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370 | else |
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371 | ordering = PERMUTE; |
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372 | } |
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373 | |
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374 | if (nextchar == NULL || *nextchar == '\0') |
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375 | { |
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376 | if (ordering == PERMUTE) |
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377 | { |
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378 | /* If we have just processed some options following some non-options, |
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379 | exchange them so that the options come first. */ |
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380 | |
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381 | if (first_nonopt != last_nonopt && last_nonopt != optind) |
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382 | exchange ((char **) argv); |
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383 | else if (last_nonopt != optind) |
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384 | first_nonopt = optind; |
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385 | |
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386 | /* Now skip any additional non-options |
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387 | and extend the range of non-options previously skipped. */ |
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388 | |
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389 | while (optind < argc |
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390 | && (argv[optind][0] != '-' || argv[optind][1] == '\0') |
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391 | #ifdef GETOPT_COMPAT |
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392 | && (longopts == NULL |
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393 | || argv[optind][0] != '+' || argv[optind][1] == '\0') |
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394 | #endif /* GETOPT_COMPAT */ |
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395 | ) |
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396 | optind++; |
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397 | last_nonopt = optind; |
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398 | } |
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399 | |
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400 | /* Special ARGV-element `--' means premature end of options. |
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401 | Skip it like a null option, |
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402 | then exchange with previous non-options as if it were an option, |
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403 | then skip everything else like a non-option. */ |
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404 | |
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405 | if (optind != argc && !strcmp (argv[optind], "--")) |
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406 | { |
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407 | optind++; |
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408 | |
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409 | if (first_nonopt != last_nonopt && last_nonopt != optind) |
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410 | exchange ((char **) argv); |
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411 | else if (first_nonopt == last_nonopt) |
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412 | first_nonopt = optind; |
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413 | last_nonopt = argc; |
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414 | |
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415 | optind = argc; |
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416 | } |
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417 | |
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418 | /* If we have done all the ARGV-elements, stop the scan |
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419 | and back over any non-options that we skipped and permuted. */ |
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420 | |
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421 | if (optind == argc) |
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422 | { |
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423 | /* Set the next-arg-index to point at the non-options |
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424 | that we previously skipped, so the caller will digest them. */ |
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425 | if (first_nonopt != last_nonopt) |
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426 | optind = first_nonopt; |
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427 | return EOF; |
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428 | } |
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429 | |
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430 | /* If we have come to a non-option and did not permute it, |
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431 | either stop the scan or describe it to the caller and pass it by. */ |
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432 | |
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433 | if ((argv[optind][0] != '-' || argv[optind][1] == '\0') |
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434 | #ifdef GETOPT_COMPAT |
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435 | && (longopts == NULL |
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436 | || argv[optind][0] != '+' || argv[optind][1] == '\0') |
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437 | #endif /* GETOPT_COMPAT */ |
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438 | ) |
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439 | { |
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440 | if (ordering == REQUIRE_ORDER) |
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441 | return EOF; |
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442 | optarg = argv[optind++]; |
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443 | return 1; |
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444 | } |
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445 | |
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446 | /* We have found another option-ARGV-element. |
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447 | Start decoding its characters. */ |
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448 | |
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449 | nextchar = (argv[optind] + 1 |
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450 | + (longopts != NULL && argv[optind][1] == '-')); |
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451 | } |
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452 | |
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453 | if (longopts != NULL |
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454 | && ((argv[optind][0] == '-' |
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455 | && (argv[optind][1] == '-' || long_only)) |
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456 | #ifdef GETOPT_COMPAT |
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457 | || argv[optind][0] == '+' |
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458 | #endif /* GETOPT_COMPAT */ |
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459 | )) |
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460 | { |
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461 | const struct option *p; |
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462 | char *s = nextchar; |
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463 | int exact = 0; |
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464 | int ambig = 0; |
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465 | const struct option *pfound = NULL; |
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466 | int indfound = 0; |
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467 | |
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468 | while (*s && *s != '=') |
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469 | s++; |
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470 | |
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471 | /* Test all options for either exact match or abbreviated matches. */ |
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472 | for (p = longopts, option_index = 0; p->name; |
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473 | p++, option_index++) |
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474 | if (!strncmp (p->name, nextchar, s - nextchar)) |
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475 | { |
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476 | if (s - nextchar == my_strlen (p->name)) |
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477 | { |
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478 | /* Exact match found. */ |
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479 | pfound = p; |
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480 | indfound = option_index; |
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481 | exact = 1; |
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482 | break; |
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483 | } |
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484 | else if (pfound == NULL) |
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485 | { |
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486 | /* First nonexact match found. */ |
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487 | pfound = p; |
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488 | indfound = option_index; |
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489 | } |
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490 | else |
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491 | /* Second nonexact match found. */ |
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492 | ambig = 1; |
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493 | } |
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494 | |
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495 | if (ambig && !exact) |
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496 | { |
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497 | if (opterr) |
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498 | fprintf (stderr, "%s: option `%s' is ambiguous\n", |
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499 | argv[0], argv[optind]); |
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500 | nextchar += my_strlen (nextchar); |
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501 | optind++; |
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502 | return BAD_OPTION; |
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503 | } |
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504 | |
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505 | if (pfound != NULL) |
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506 | { |
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507 | option_index = indfound; |
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508 | optind++; |
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509 | if (*s) |
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510 | { |
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511 | /* Don't test has_arg with >, because some C compilers don't |
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512 | allow it to be used on enums. */ |
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513 | if (pfound->has_arg) |
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514 | optarg = s + 1; |
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515 | else |
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516 | { |
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517 | if (opterr) |
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518 | { |
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519 | if (argv[optind - 1][1] == '-') |
---|
520 | /* --option */ |
---|
521 | fprintf (stderr, |
---|
522 | "%s: option `--%s' doesn't allow an argument\n", |
---|
523 | argv[0], pfound->name); |
---|
524 | else |
---|
525 | /* +option or -option */ |
---|
526 | fprintf (stderr, |
---|
527 | "%s: option `%c%s' doesn't allow an argument\n", |
---|
528 | argv[0], argv[optind - 1][0], pfound->name); |
---|
529 | } |
---|
530 | nextchar += my_strlen (nextchar); |
---|
531 | return BAD_OPTION; |
---|
532 | } |
---|
533 | } |
---|
534 | else if (pfound->has_arg == 1) |
---|
535 | { |
---|
536 | if (optind < argc) |
---|
537 | optarg = argv[optind++]; |
---|
538 | else |
---|
539 | { |
---|
540 | if (opterr) |
---|
541 | fprintf (stderr, "%s: option `%s' requires an argument\n", |
---|
542 | argv[0], argv[optind - 1]); |
---|
543 | nextchar += my_strlen (nextchar); |
---|
544 | return optstring[0] == ':' ? ':' : BAD_OPTION; |
---|
545 | } |
---|
546 | } |
---|
547 | nextchar += my_strlen (nextchar); |
---|
548 | if (longind != NULL) |
---|
549 | *longind = option_index; |
---|
550 | if (pfound->flag) |
---|
551 | { |
---|
552 | *(pfound->flag) = pfound->val; |
---|
553 | return 0; |
---|
554 | } |
---|
555 | return pfound->val; |
---|
556 | } |
---|
557 | /* Can't find it as a long option. If this is not getopt_long_only, |
---|
558 | or the option starts with '--' or is not a valid short |
---|
559 | option, then it's an error. |
---|
560 | Otherwise interpret it as a short option. */ |
---|
561 | if (!long_only || argv[optind][1] == '-' |
---|
562 | #ifdef GETOPT_COMPAT |
---|
563 | || argv[optind][0] == '+' |
---|
564 | #endif /* GETOPT_COMPAT */ |
---|
565 | || my_index (optstring, *nextchar) == NULL) |
---|
566 | { |
---|
567 | if (opterr) |
---|
568 | { |
---|
569 | if (argv[optind][1] == '-') |
---|
570 | /* --option */ |
---|
571 | fprintf (stderr, "%s: unrecognized option `--%s'\n", |
---|
572 | argv[0], nextchar); |
---|
573 | else |
---|
574 | /* +option or -option */ |
---|
575 | fprintf (stderr, "%s: unrecognized option `%c%s'\n", |
---|
576 | argv[0], argv[optind][0], nextchar); |
---|
577 | } |
---|
578 | nextchar = (char *) ""; |
---|
579 | optind++; |
---|
580 | return BAD_OPTION; |
---|
581 | } |
---|
582 | } |
---|
583 | |
---|
584 | /* Look at and handle the next option-character. */ |
---|
585 | |
---|
586 | { |
---|
587 | char c = *nextchar++; |
---|
588 | char *temp = my_index (optstring, c); |
---|
589 | |
---|
590 | /* Increment `optind' when we start to process its last character. */ |
---|
591 | if (*nextchar == '\0') |
---|
592 | ++optind; |
---|
593 | |
---|
594 | if (temp == NULL || c == ':') |
---|
595 | { |
---|
596 | if (opterr) |
---|
597 | { |
---|
598 | #if 0 |
---|
599 | if (c < 040 || c >= 0177) |
---|
600 | fprintf (stderr, "%s: unrecognized option, character code 0%o\n", |
---|
601 | argv[0], c); |
---|
602 | else |
---|
603 | fprintf (stderr, "%s: unrecognized option `-%c'\n", argv[0], c); |
---|
604 | #else |
---|
605 | /* 1003.2 specifies the format of this message. */ |
---|
606 | fprintf (stderr, "%s: illegal option -- %c\n", argv[0], c); |
---|
607 | #endif |
---|
608 | } |
---|
609 | optopt = c; |
---|
610 | return BAD_OPTION; |
---|
611 | } |
---|
612 | if (temp[1] == ':') |
---|
613 | { |
---|
614 | if (temp[2] == ':') |
---|
615 | { |
---|
616 | /* This is an option that accepts an argument optionally. */ |
---|
617 | if (*nextchar != '\0') |
---|
618 | { |
---|
619 | optarg = nextchar; |
---|
620 | optind++; |
---|
621 | } |
---|
622 | else |
---|
623 | optarg = 0; |
---|
624 | nextchar = NULL; |
---|
625 | } |
---|
626 | else |
---|
627 | { |
---|
628 | /* This is an option that requires an argument. */ |
---|
629 | if (*nextchar != '\0') |
---|
630 | { |
---|
631 | optarg = nextchar; |
---|
632 | /* If we end this ARGV-element by taking the rest as an arg, |
---|
633 | we must advance to the next element now. */ |
---|
634 | optind++; |
---|
635 | } |
---|
636 | else if (optind == argc) |
---|
637 | { |
---|
638 | if (opterr) |
---|
639 | { |
---|
640 | #if 0 |
---|
641 | fprintf (stderr, "%s: option `-%c' requires an argument\n", |
---|
642 | argv[0], c); |
---|
643 | #else |
---|
644 | /* 1003.2 specifies the format of this message. */ |
---|
645 | fprintf (stderr, "%s: option requires an argument -- %c\n", |
---|
646 | argv[0], c); |
---|
647 | #endif |
---|
648 | } |
---|
649 | optopt = c; |
---|
650 | if (optstring[0] == ':') |
---|
651 | c = ':'; |
---|
652 | else |
---|
653 | c = BAD_OPTION; |
---|
654 | } |
---|
655 | else |
---|
656 | /* We already incremented `optind' once; |
---|
657 | increment it again when taking next ARGV-elt as argument. */ |
---|
658 | optarg = argv[optind++]; |
---|
659 | nextchar = NULL; |
---|
660 | } |
---|
661 | } |
---|
662 | return c; |
---|
663 | } |
---|
664 | } |
---|
665 | |
---|
666 | int |
---|
667 | getopt (argc, argv, optstring) |
---|
668 | int argc; |
---|
669 | char *const *argv; |
---|
670 | const char *optstring; |
---|
671 | { |
---|
672 | return _getopt_internal (argc, argv, optstring, |
---|
673 | (const struct option *) 0, |
---|
674 | (int *) 0, |
---|
675 | 0); |
---|
676 | } |
---|
677 | |
---|
678 | int |
---|
679 | getopt_long (argc, argv, options, long_options, opt_index) |
---|
680 | int argc; |
---|
681 | char *const *argv; |
---|
682 | const char *options; |
---|
683 | const struct option *long_options; |
---|
684 | int *opt_index; |
---|
685 | { |
---|
686 | return _getopt_internal (argc, argv, options, long_options, opt_index, 0); |
---|
687 | } |
---|
688 | |
---|
689 | #endif /* _LIBC or not __GNU_LIBRARY__. */ |
---|
690 | |
---|
691 | #ifdef TEST_GETOPT |
---|
692 | |
---|
693 | /* Compile with -DTEST_GETOPT to make an executable for use in testing |
---|
694 | the above definition of `getopt'. */ |
---|
695 | |
---|
696 | int |
---|
697 | main (argc, argv) |
---|
698 | int argc; |
---|
699 | char **argv; |
---|
700 | { |
---|
701 | int c; |
---|
702 | int digit_optind = 0; |
---|
703 | |
---|
704 | while (1) |
---|
705 | { |
---|
706 | int this_option_optind = optind ? optind : 1; |
---|
707 | |
---|
708 | c = getopt (argc, argv, "abc:d:0123456789"); |
---|
709 | if (c == EOF) |
---|
710 | break; |
---|
711 | |
---|
712 | switch (c) |
---|
713 | { |
---|
714 | case '0': |
---|
715 | case '1': |
---|
716 | case '2': |
---|
717 | case '3': |
---|
718 | case '4': |
---|
719 | case '5': |
---|
720 | case '6': |
---|
721 | case '7': |
---|
722 | case '8': |
---|
723 | case '9': |
---|
724 | if (digit_optind != 0 && digit_optind != this_option_optind) |
---|
725 | printf ("digits occur in two different argv-elements.\n"); |
---|
726 | digit_optind = this_option_optind; |
---|
727 | printf ("option %c\n", c); |
---|
728 | break; |
---|
729 | |
---|
730 | case 'a': |
---|
731 | printf ("option a\n"); |
---|
732 | break; |
---|
733 | |
---|
734 | case 'b': |
---|
735 | printf ("option b\n"); |
---|
736 | break; |
---|
737 | |
---|
738 | case 'c': |
---|
739 | printf ("option c with value `%s'\n", optarg); |
---|
740 | break; |
---|
741 | |
---|
742 | case BAD_OPTION: |
---|
743 | break; |
---|
744 | |
---|
745 | default: |
---|
746 | printf ("?? getopt returned character code 0%o ??\n", c); |
---|
747 | } |
---|
748 | } |
---|
749 | |
---|
750 | if (optind < argc) |
---|
751 | { |
---|
752 | printf ("non-option ARGV-elements: "); |
---|
753 | while (optind < argc) |
---|
754 | printf ("%s ", argv[optind++]); |
---|
755 | printf ("\n"); |
---|
756 | } |
---|
757 | |
---|
758 | exit (0); |
---|
759 | } |
---|
760 | |
---|
761 | #endif /* TEST_GETOPT */ |
---|