1 | /* Getopt for GNU. |
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2 | NOTE: getopt is now part of the C library, so if you don't know what |
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3 | "Keep this file name-space clean" means, talk to roland@gnu.ai.mit.edu |
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4 | before changing it! |
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5 | |
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6 | Copyright (C) 1987, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97 |
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7 | Free Software Foundation, Inc. |
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8 | |
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9 | NOTE: The canonical source of this file is maintained with the GNU C Library. |
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10 | Bugs can be reported to bug-glibc@prep.ai.mit.edu. |
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11 | |
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12 | This program is free software; you can redistribute it and/or modify it |
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13 | under the terms of the GNU General Public License as published by the |
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14 | Free Software Foundation; either version 2, or (at your option) any |
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15 | later version. |
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16 | |
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17 | This program is distributed in the hope that it will be useful, |
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18 | but WITHOUT ANY WARRANTY; without even the implied warranty of |
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19 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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20 | GNU General Public License for more details. |
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21 | |
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22 | You should have received a copy of the GNU General Public License |
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23 | along with this program; if not, write to the Free Software |
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24 | Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, |
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25 | USA. */ |
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26 | |
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27 | /* This tells Alpha OSF/1 not to define a getopt prototype in <stdio.h>. |
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28 | Ditto for AIX 3.2 and <stdlib.h>. */ |
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29 | #ifndef _NO_PROTO |
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30 | #define _NO_PROTO |
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31 | #endif |
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32 | |
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33 | #ifdef HAVE_CONFIG_H |
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34 | #include <config.h> |
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35 | #endif |
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36 | |
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37 | #if !defined (__STDC__) || !__STDC__ |
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38 | /* This is a separate conditional since some stdc systems |
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39 | reject `defined (const)'. */ |
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40 | #ifndef const |
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41 | #define const |
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42 | #endif |
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43 | #endif |
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44 | |
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45 | #include <stdio.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 | #define GETOPT_INTERFACE_VERSION 2 |
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56 | #if !defined (_LIBC) && defined (__GLIBC__) && __GLIBC__ >= 2 |
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57 | #include <gnu-versions.h> |
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58 | #if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION |
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59 | #define ELIDE_CODE |
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60 | #endif |
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61 | #endif |
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62 | |
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63 | #ifndef ELIDE_CODE |
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64 | |
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65 | |
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66 | /* This needs to come after some library #include |
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67 | to get __GNU_LIBRARY__ defined. */ |
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68 | #ifdef __GNU_LIBRARY__ |
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69 | /* Don't include stdlib.h for non-GNU C libraries because some of them |
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70 | contain conflicting prototypes for getopt. */ |
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71 | #include <stdlib.h> |
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72 | #include <unistd.h> |
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73 | #endif /* GNU C library. */ |
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74 | |
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75 | #ifdef VMS |
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76 | #include <unixlib.h> |
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77 | #if HAVE_STRING_H - 0 |
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78 | #include <string.h> |
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79 | #endif |
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80 | #endif |
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81 | |
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82 | #ifndef _ |
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83 | /* This is for other GNU distributions with internationalized messages. |
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84 | When compiling libc, the _ macro is predefined. */ |
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85 | #ifdef HAVE_LIBINTL_H |
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86 | # include <libintl.h> |
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87 | # define _(msgid) gettext (msgid) |
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88 | #else |
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89 | # define _(msgid) (msgid) |
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90 | #endif |
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91 | #endif |
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92 | |
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93 | /* This version of `getopt' appears to the caller like standard Unix `getopt' |
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94 | but it behaves differently for the user, since it allows the user |
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95 | to intersperse the options with the other arguments. |
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96 | |
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97 | As `getopt' works, it permutes the elements of ARGV so that, |
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98 | when it is done, all the options precede everything else. Thus |
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99 | all application programs are extended to handle flexible argument order. |
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100 | |
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101 | Setting the environment variable POSIXLY_CORRECT disables permutation. |
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102 | Then the behavior is completely standard. |
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103 | |
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104 | GNU application programs can use a third alternative mode in which |
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105 | they can distinguish the relative order of options and other arguments. */ |
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106 | |
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107 | #include "getopt.h" |
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108 | |
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109 | /* For communication from `getopt' to the caller. |
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110 | When `getopt' finds an option that takes an argument, |
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111 | the argument value is returned here. |
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112 | Also, when `ordering' is RETURN_IN_ORDER, |
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113 | each non-option ARGV-element is returned here. */ |
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114 | |
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115 | char *optarg = NULL; |
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116 | |
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117 | /* Index in ARGV of the next element to be scanned. |
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118 | This is used for communication to and from the caller |
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119 | and for communication between successive calls to `getopt'. |
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120 | |
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121 | On entry to `getopt', zero means this is the first call; initialize. |
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122 | |
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123 | When `getopt' returns -1, this is the index of the first of the |
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124 | non-option elements that the caller should itself scan. |
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125 | |
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126 | Otherwise, `optind' communicates from one call to the next |
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127 | how much of ARGV has been scanned so far. */ |
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128 | |
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129 | /* 1003.2 says this must be 1 before any call. */ |
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130 | int optind = 1; |
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131 | |
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132 | /* Formerly, initialization of getopt depended on optind==0, which |
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133 | causes problems with re-calling getopt as programs generally don't |
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134 | know that. */ |
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135 | |
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136 | int __getopt_initialized = 0; |
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137 | |
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138 | /* The next char to be scanned in the option-element |
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139 | in which the last option character we returned was found. |
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140 | This allows us to pick up the scan where we left off. |
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141 | |
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142 | If this is zero, or a null string, it means resume the scan |
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143 | by advancing to the next ARGV-element. */ |
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144 | |
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145 | static char *nextchar; |
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146 | |
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147 | /* Callers store zero here to inhibit the error message |
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148 | for unrecognized options. */ |
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149 | |
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150 | int opterr = 1; |
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151 | |
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152 | /* Set to an option character which was unrecognized. |
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153 | This must be initialized on some systems to avoid linking in the |
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154 | system's own getopt implementation. */ |
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155 | |
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156 | int optopt = '?'; |
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157 | |
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158 | /* Describe how to deal with options that follow non-option ARGV-elements. |
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159 | |
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160 | If the caller did not specify anything, |
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161 | the default is REQUIRE_ORDER if the environment variable |
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162 | POSIXLY_CORRECT is defined, PERMUTE otherwise. |
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163 | |
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164 | REQUIRE_ORDER means don't recognize them as options; |
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165 | stop option processing when the first non-option is seen. |
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166 | This is what Unix does. |
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167 | This mode of operation is selected by either setting the environment |
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168 | variable POSIXLY_CORRECT, or using `+' as the first character |
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169 | of the list of option characters. |
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170 | |
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171 | PERMUTE is the default. We permute the contents of ARGV as we scan, |
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172 | so that eventually all the non-options are at the end. This allows options |
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173 | to be given in any order, even with programs that were not written to |
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174 | expect this. |
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175 | |
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176 | RETURN_IN_ORDER is an option available to programs that were written |
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177 | to expect options and other ARGV-elements in any order and that care about |
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178 | the ordering of the two. We describe each non-option ARGV-element |
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179 | as if it were the argument of an option with character code 1. |
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180 | Using `-' as the first character of the list of option characters |
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181 | selects this mode of operation. |
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182 | |
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183 | The special argument `--' forces an end of option-scanning regardless |
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184 | of the value of `ordering'. In the case of RETURN_IN_ORDER, only |
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185 | `--' can cause `getopt' to return -1 with `optind' != ARGC. */ |
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186 | |
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187 | static enum |
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188 | { |
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189 | REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER |
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190 | } ordering; |
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191 | |
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192 | /* Value of POSIXLY_CORRECT environment variable. */ |
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193 | static char *posixly_correct; |
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194 | |
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195 | #ifdef __GNU_LIBRARY__ |
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196 | /* We want to avoid inclusion of string.h with non-GNU libraries |
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197 | because there are many ways it can cause trouble. |
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198 | On some systems, it contains special magic macros that don't work |
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199 | in GCC. */ |
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200 | #include <string.h> |
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201 | #define my_index strchr |
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202 | #else |
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203 | |
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204 | /* Avoid depending on library functions or files |
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205 | whose names are inconsistent. */ |
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206 | |
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207 | char *getenv (); |
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208 | |
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209 | static char * |
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210 | my_index (str, chr) |
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211 | const char *str; |
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212 | int chr; |
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213 | { |
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214 | while (*str) |
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215 | { |
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216 | if (*str == chr) |
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217 | return (char *) str; |
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218 | str++; |
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219 | } |
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220 | return 0; |
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221 | } |
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222 | |
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223 | /* If using GCC, we can safely declare strlen this way. |
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224 | If not using GCC, it is ok not to declare it. */ |
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225 | #ifdef __GNUC__ |
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226 | /* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h. |
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227 | That was relevant to code that was here before. */ |
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228 | #if !defined (__STDC__) || !__STDC__ |
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229 | /* gcc with -traditional declares the built-in strlen to return int, |
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230 | and has done so at least since version 2.4.5. -- rms. */ |
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231 | extern int strlen (const char *); |
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232 | #endif /* not __STDC__ */ |
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233 | #endif /* __GNUC__ */ |
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234 | |
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235 | #endif /* not __GNU_LIBRARY__ */ |
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236 | |
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237 | /* Handle permutation of arguments. */ |
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238 | |
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239 | /* Describe the part of ARGV that contains non-options that have |
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240 | been skipped. `first_nonopt' is the index in ARGV of the first of them; |
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241 | `last_nonopt' is the index after the last of them. */ |
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242 | |
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243 | static int first_nonopt; |
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244 | static int last_nonopt; |
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245 | |
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246 | #ifdef _LIBC |
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247 | /* Bash 2.0 gives us an environment variable containing flags |
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248 | indicating ARGV elements that should not be considered arguments. */ |
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249 | |
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250 | /* Defined in getopt_init.c */ |
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251 | extern char *__getopt_nonoption_flags; |
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252 | |
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253 | static int nonoption_flags_max_len; |
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254 | static int nonoption_flags_len; |
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255 | |
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256 | static int original_argc; |
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257 | static char *const *original_argv; |
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258 | |
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259 | /* Make sure the environment variable bash 2.0 puts in the environment |
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260 | is valid for the getopt call we must make sure that the ARGV passed |
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261 | to getopt is that one passed to the process. */ |
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262 | static void |
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263 | __attribute__ ((unused)) |
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264 | store_args_and_env (int argc, char *const *argv) |
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265 | { |
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266 | /* XXX This is no good solution. We should rather copy the args so |
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267 | that we can compare them later. But we must not use malloc(3). */ |
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268 | original_argc = argc; |
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269 | original_argv = argv; |
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270 | } |
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271 | # ifdef text_set_element |
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272 | text_set_element (__libc_subinit, store_args_and_env); |
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273 | # endif /* text_set_element */ |
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274 | |
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275 | # define SWAP_FLAGS(ch1, ch2) \ |
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276 | if (nonoption_flags_len > 0) \ |
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277 | { \ |
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278 | char __tmp = __getopt_nonoption_flags[ch1]; \ |
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279 | __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \ |
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280 | __getopt_nonoption_flags[ch2] = __tmp; \ |
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281 | } |
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282 | #else /* !_LIBC */ |
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283 | # define SWAP_FLAGS(ch1, ch2) |
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284 | #endif /* _LIBC */ |
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285 | |
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286 | /* Exchange two adjacent subsequences of ARGV. |
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287 | One subsequence is elements [first_nonopt,last_nonopt) |
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288 | which contains all the non-options that have been skipped so far. |
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289 | The other is elements [last_nonopt,optind), which contains all |
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290 | the options processed since those non-options were skipped. |
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291 | |
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292 | `first_nonopt' and `last_nonopt' are relocated so that they describe |
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293 | the new indices of the non-options in ARGV after they are moved. */ |
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294 | |
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295 | #if defined (__STDC__) && __STDC__ |
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296 | static void exchange (char **); |
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297 | #endif |
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298 | |
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299 | static void |
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300 | exchange (argv) |
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301 | char **argv; |
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302 | { |
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303 | int bottom = first_nonopt; |
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304 | int middle = last_nonopt; |
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305 | int top = optind; |
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306 | char *tem; |
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307 | |
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308 | /* Exchange the shorter segment with the far end of the longer segment. |
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309 | That puts the shorter segment into the right place. |
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310 | It leaves the longer segment in the right place overall, |
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311 | but it consists of two parts that need to be swapped next. */ |
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312 | |
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313 | #ifdef _LIBC |
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314 | /* First make sure the handling of the `__getopt_nonoption_flags' |
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315 | string can work normally. Our top argument must be in the range |
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316 | of the string. */ |
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317 | if (nonoption_flags_len > 0 && top >= nonoption_flags_max_len) |
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318 | { |
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319 | /* We must extend the array. The user plays games with us and |
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320 | presents new arguments. */ |
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321 | char *new_str = malloc (top + 1); |
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322 | if (new_str == NULL) |
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323 | nonoption_flags_len = nonoption_flags_max_len = 0; |
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324 | else |
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325 | { |
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326 | memset (__mempcpy (new_str, __getopt_nonoption_flags, |
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327 | nonoption_flags_max_len), |
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328 | '\0', top + 1 - nonoption_flags_max_len); |
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329 | nonoption_flags_max_len = top + 1; |
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330 | __getopt_nonoption_flags = new_str; |
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331 | } |
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332 | } |
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333 | #endif |
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334 | |
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335 | while (top > middle && middle > bottom) |
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336 | { |
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337 | if (top - middle > middle - bottom) |
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338 | { |
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339 | /* Bottom segment is the short one. */ |
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340 | int len = middle - bottom; |
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341 | register int i; |
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342 | |
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343 | /* Swap it with the top part of the top segment. */ |
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344 | for (i = 0; i < len; i++) |
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345 | { |
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346 | tem = argv[bottom + i]; |
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347 | argv[bottom + i] = argv[top - (middle - bottom) + i]; |
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348 | argv[top - (middle - bottom) + i] = tem; |
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349 | SWAP_FLAGS (bottom + i, top - (middle - bottom) + i); |
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350 | } |
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351 | /* Exclude the moved bottom segment from further swapping. */ |
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352 | top -= len; |
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353 | } |
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354 | else |
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355 | { |
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356 | /* Top segment is the short one. */ |
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357 | int len = top - middle; |
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358 | register int i; |
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359 | |
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360 | /* Swap it with the bottom part of the bottom segment. */ |
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361 | for (i = 0; i < len; i++) |
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362 | { |
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363 | tem = argv[bottom + i]; |
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364 | argv[bottom + i] = argv[middle + i]; |
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365 | argv[middle + i] = tem; |
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366 | SWAP_FLAGS (bottom + i, middle + i); |
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367 | } |
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368 | /* Exclude the moved top segment from further swapping. */ |
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369 | bottom += len; |
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370 | } |
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371 | } |
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372 | |
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373 | /* Update records for the slots the non-options now occupy. */ |
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374 | |
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375 | first_nonopt += (optind - last_nonopt); |
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376 | last_nonopt = optind; |
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377 | } |
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378 | |
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379 | /* Initialize the internal data when the first call is made. */ |
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380 | |
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381 | #if defined (__STDC__) && __STDC__ |
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382 | static const char *_getopt_initialize (int, char *const *, const char *); |
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383 | #endif |
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384 | static const char * |
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385 | _getopt_initialize (argc, argv, optstring) |
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386 | int argc; |
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387 | char *const *argv; |
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388 | const char *optstring; |
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389 | { |
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390 | /* Start processing options with ARGV-element 1 (since ARGV-element 0 |
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391 | is the program name); the sequence of previously skipped |
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392 | non-option ARGV-elements is empty. */ |
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393 | |
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394 | first_nonopt = last_nonopt = optind; |
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395 | |
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396 | nextchar = NULL; |
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397 | |
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398 | posixly_correct = getenv ("POSIXLY_CORRECT"); |
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399 | |
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400 | /* Determine how to handle the ordering of options and nonoptions. */ |
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401 | |
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402 | if (optstring[0] == '-') |
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403 | { |
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404 | ordering = RETURN_IN_ORDER; |
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405 | ++optstring; |
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406 | } |
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407 | else if (optstring[0] == '+') |
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408 | { |
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409 | ordering = REQUIRE_ORDER; |
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410 | ++optstring; |
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411 | } |
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412 | else if (posixly_correct != NULL) |
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413 | ordering = REQUIRE_ORDER; |
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414 | else |
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415 | ordering = PERMUTE; |
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416 | |
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417 | #ifdef _LIBC |
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418 | if (posixly_correct == NULL |
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419 | && argc == original_argc && argv == original_argv) |
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420 | { |
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421 | if (nonoption_flags_max_len == 0) |
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422 | { |
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423 | if (__getopt_nonoption_flags == NULL |
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424 | || __getopt_nonoption_flags[0] == '\0') |
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425 | nonoption_flags_max_len = -1; |
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426 | else |
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427 | { |
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428 | const char *orig_str = __getopt_nonoption_flags; |
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429 | int len = nonoption_flags_max_len = strlen (orig_str); |
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430 | if (nonoption_flags_max_len < argc) |
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431 | nonoption_flags_max_len = argc; |
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432 | __getopt_nonoption_flags = |
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433 | (char *) malloc (nonoption_flags_max_len); |
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434 | if (__getopt_nonoption_flags == NULL) |
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435 | nonoption_flags_max_len = -1; |
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436 | else |
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437 | memset (__mempcpy (__getopt_nonoption_flags, orig_str, len), |
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438 | '\0', nonoption_flags_max_len - len); |
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439 | } |
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440 | } |
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441 | nonoption_flags_len = nonoption_flags_max_len; |
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442 | } |
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443 | else |
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444 | nonoption_flags_len = 0; |
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445 | #endif |
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446 | |
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447 | return optstring; |
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448 | } |
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449 | |
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450 | /* Scan elements of ARGV (whose length is ARGC) for option characters |
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451 | given in OPTSTRING. |
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452 | |
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453 | If an element of ARGV starts with '-', and is not exactly "-" or "--", |
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454 | then it is an option element. The characters of this element |
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455 | (aside from the initial '-') are option characters. If `getopt' |
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456 | is called repeatedly, it returns successively each of the option characters |
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457 | from each of the option elements. |
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458 | |
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459 | If `getopt' finds another option character, it returns that character, |
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460 | updating `optind' and `nextchar' so that the next call to `getopt' can |
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461 | resume the scan with the following option character or ARGV-element. |
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462 | |
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463 | If there are no more option characters, `getopt' returns -1. |
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464 | Then `optind' is the index in ARGV of the first ARGV-element |
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465 | that is not an option. (The ARGV-elements have been permuted |
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466 | so that those that are not options now come last.) |
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467 | |
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468 | OPTSTRING is a string containing the legitimate option characters. |
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469 | If an option character is seen that is not listed in OPTSTRING, |
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470 | return '?' after printing an error message. If you set `opterr' to |
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471 | zero, the error message is suppressed but we still return '?'. |
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472 | |
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473 | If a char in OPTSTRING is followed by a colon, that means it wants an arg, |
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474 | so the following text in the same ARGV-element, or the text of the following |
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475 | ARGV-element, is returned in `optarg'. Two colons mean an option that |
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476 | wants an optional arg; if there is text in the current ARGV-element, |
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477 | it is returned in `optarg', otherwise `optarg' is set to zero. |
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478 | |
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479 | If OPTSTRING starts with `-' or `+', it requests different methods of |
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480 | handling the non-option ARGV-elements. |
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481 | See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above. |
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482 | |
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483 | Long-named options begin with `--' instead of `-'. |
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484 | Their names may be abbreviated as long as the abbreviation is unique |
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485 | or is an exact match for some defined option. If they have an |
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486 | argument, it follows the option name in the same ARGV-element, separated |
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487 | from the option name by a `=', or else the in next ARGV-element. |
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488 | When `getopt' finds a long-named option, it returns 0 if that option's |
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489 | `flag' field is nonzero, the value of the option's `val' field |
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490 | if the `flag' field is zero. |
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491 | |
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492 | The elements of ARGV aren't really const, because we permute them. |
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493 | But we pretend they're const in the prototype to be compatible |
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494 | with other systems. |
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495 | |
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496 | LONGOPTS is a vector of `struct option' terminated by an |
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497 | element containing a name which is zero. |
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498 | |
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499 | LONGIND returns the index in LONGOPT of the long-named option found. |
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500 | It is only valid when a long-named option has been found by the most |
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501 | recent call. |
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502 | |
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503 | If LONG_ONLY is nonzero, '-' as well as '--' can introduce |
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504 | long-named options. */ |
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505 | |
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506 | int |
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507 | _getopt_internal (argc, argv, optstring, longopts, longind, long_only) |
---|
508 | int argc; |
---|
509 | char *const *argv; |
---|
510 | const char *optstring; |
---|
511 | const struct option *longopts; |
---|
512 | int *longind; |
---|
513 | int long_only; |
---|
514 | { |
---|
515 | optarg = NULL; |
---|
516 | |
---|
517 | if (optind == 0 || !__getopt_initialized) |
---|
518 | { |
---|
519 | if (optind == 0) |
---|
520 | optind = 1; /* Don't scan ARGV[0], the program name. */ |
---|
521 | optstring = _getopt_initialize (argc, argv, optstring); |
---|
522 | __getopt_initialized = 1; |
---|
523 | } |
---|
524 | |
---|
525 | /* Test whether ARGV[optind] points to a non-option argument. |
---|
526 | Either it does not have option syntax, or there is an environment flag |
---|
527 | from the shell indicating it is not an option. The later information |
---|
528 | is only used when the used in the GNU libc. */ |
---|
529 | #ifdef _LIBC |
---|
530 | #define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0' \ |
---|
531 | || (optind < nonoption_flags_len \ |
---|
532 | && __getopt_nonoption_flags[optind] == '1')) |
---|
533 | #else |
---|
534 | #define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0') |
---|
535 | #endif |
---|
536 | |
---|
537 | if (nextchar == NULL || *nextchar == '\0') |
---|
538 | { |
---|
539 | /* Advance to the next ARGV-element. */ |
---|
540 | |
---|
541 | /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been |
---|
542 | moved back by the user (who may also have changed the arguments). */ |
---|
543 | if (last_nonopt > optind) |
---|
544 | last_nonopt = optind; |
---|
545 | if (first_nonopt > optind) |
---|
546 | first_nonopt = optind; |
---|
547 | |
---|
548 | if (ordering == PERMUTE) |
---|
549 | { |
---|
550 | /* If we have just processed some options following some non-options, |
---|
551 | exchange them so that the options come first. */ |
---|
552 | |
---|
553 | if (first_nonopt != last_nonopt && last_nonopt != optind) |
---|
554 | exchange ((char **) argv); |
---|
555 | else if (last_nonopt != optind) |
---|
556 | first_nonopt = optind; |
---|
557 | |
---|
558 | /* Skip any additional non-options |
---|
559 | and extend the range of non-options previously skipped. */ |
---|
560 | |
---|
561 | while (optind < argc && NONOPTION_P) |
---|
562 | optind++; |
---|
563 | last_nonopt = optind; |
---|
564 | } |
---|
565 | |
---|
566 | /* The special ARGV-element `--' means premature end of options. |
---|
567 | Skip it like a null option, |
---|
568 | then exchange with previous non-options as if it were an option, |
---|
569 | then skip everything else like a non-option. */ |
---|
570 | |
---|
571 | if (optind != argc && !strcmp (argv[optind], "--")) |
---|
572 | { |
---|
573 | optind++; |
---|
574 | |
---|
575 | if (first_nonopt != last_nonopt && last_nonopt != optind) |
---|
576 | exchange ((char **) argv); |
---|
577 | else if (first_nonopt == last_nonopt) |
---|
578 | first_nonopt = optind; |
---|
579 | last_nonopt = argc; |
---|
580 | |
---|
581 | optind = argc; |
---|
582 | } |
---|
583 | |
---|
584 | /* If we have done all the ARGV-elements, stop the scan |
---|
585 | and back over any non-options that we skipped and permuted. */ |
---|
586 | |
---|
587 | if (optind == argc) |
---|
588 | { |
---|
589 | /* Set the next-arg-index to point at the non-options |
---|
590 | that we previously skipped, so the caller will digest them. */ |
---|
591 | if (first_nonopt != last_nonopt) |
---|
592 | optind = first_nonopt; |
---|
593 | return -1; |
---|
594 | } |
---|
595 | |
---|
596 | /* If we have come to a non-option and did not permute it, |
---|
597 | either stop the scan or describe it to the caller and pass it by. */ |
---|
598 | |
---|
599 | if (NONOPTION_P) |
---|
600 | { |
---|
601 | if (ordering == REQUIRE_ORDER) |
---|
602 | return -1; |
---|
603 | optarg = argv[optind++]; |
---|
604 | return 1; |
---|
605 | } |
---|
606 | |
---|
607 | /* We have found another option-ARGV-element. |
---|
608 | Skip the initial punctuation. */ |
---|
609 | |
---|
610 | nextchar = (argv[optind] + 1 |
---|
611 | + (longopts != NULL && argv[optind][1] == '-')); |
---|
612 | } |
---|
613 | |
---|
614 | /* Decode the current option-ARGV-element. */ |
---|
615 | |
---|
616 | /* Check whether the ARGV-element is a long option. |
---|
617 | |
---|
618 | If long_only and the ARGV-element has the form "-f", where f is |
---|
619 | a valid short option, don't consider it an abbreviated form of |
---|
620 | a long option that starts with f. Otherwise there would be no |
---|
621 | way to give the -f short option. |
---|
622 | |
---|
623 | On the other hand, if there's a long option "fubar" and |
---|
624 | the ARGV-element is "-fu", do consider that an abbreviation of |
---|
625 | the long option, just like "--fu", and not "-f" with arg "u". |
---|
626 | |
---|
627 | This distinction seems to be the most useful approach. */ |
---|
628 | |
---|
629 | if (longopts != NULL |
---|
630 | && (argv[optind][1] == '-' |
---|
631 | || (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1]))))) |
---|
632 | { |
---|
633 | char *nameend; |
---|
634 | const struct option *p; |
---|
635 | const struct option *pfound = NULL; |
---|
636 | int exact = 0; |
---|
637 | int ambig = 0; |
---|
638 | int indfound = -1; |
---|
639 | int option_index; |
---|
640 | |
---|
641 | for (nameend = nextchar; *nameend && *nameend != '='; nameend++) |
---|
642 | /* Do nothing. */ ; |
---|
643 | |
---|
644 | /* Test all long options for either exact match |
---|
645 | or abbreviated matches. */ |
---|
646 | for (p = longopts, option_index = 0; p->name; p++, option_index++) |
---|
647 | if (!strncmp (p->name, nextchar, nameend - nextchar)) |
---|
648 | { |
---|
649 | if ((unsigned int) (nameend - nextchar) |
---|
650 | == (unsigned int) strlen (p->name)) |
---|
651 | { |
---|
652 | /* Exact match found. */ |
---|
653 | pfound = p; |
---|
654 | indfound = option_index; |
---|
655 | exact = 1; |
---|
656 | break; |
---|
657 | } |
---|
658 | else if (pfound == NULL) |
---|
659 | { |
---|
660 | /* First nonexact match found. */ |
---|
661 | pfound = p; |
---|
662 | indfound = option_index; |
---|
663 | } |
---|
664 | else |
---|
665 | /* Second or later nonexact match found. */ |
---|
666 | ambig = 1; |
---|
667 | } |
---|
668 | |
---|
669 | if (ambig && !exact) |
---|
670 | { |
---|
671 | if (opterr) |
---|
672 | fprintf (stderr, _("%s: option `%s' is ambiguous\n"), |
---|
673 | argv[0], argv[optind]); |
---|
674 | nextchar += strlen (nextchar); |
---|
675 | optind++; |
---|
676 | optopt = 0; |
---|
677 | return '?'; |
---|
678 | } |
---|
679 | |
---|
680 | if (pfound != NULL) |
---|
681 | { |
---|
682 | option_index = indfound; |
---|
683 | optind++; |
---|
684 | if (*nameend) |
---|
685 | { |
---|
686 | /* Don't test has_arg with >, because some C compilers don't |
---|
687 | allow it to be used on enums. */ |
---|
688 | if (pfound->has_arg) |
---|
689 | optarg = nameend + 1; |
---|
690 | else |
---|
691 | { |
---|
692 | if (opterr) |
---|
693 | if (argv[optind - 1][1] == '-') |
---|
694 | /* --option */ |
---|
695 | fprintf (stderr, |
---|
696 | _("%s: option `--%s' doesn't allow an argument\n"), |
---|
697 | argv[0], pfound->name); |
---|
698 | else |
---|
699 | /* +option or -option */ |
---|
700 | fprintf (stderr, |
---|
701 | _("%s: option `%c%s' doesn't allow an argument\n"), |
---|
702 | argv[0], argv[optind - 1][0], pfound->name); |
---|
703 | |
---|
704 | nextchar += strlen (nextchar); |
---|
705 | |
---|
706 | optopt = pfound->val; |
---|
707 | return '?'; |
---|
708 | } |
---|
709 | } |
---|
710 | else if (pfound->has_arg == 1) |
---|
711 | { |
---|
712 | if (optind < argc) |
---|
713 | optarg = argv[optind++]; |
---|
714 | else |
---|
715 | { |
---|
716 | if (opterr) |
---|
717 | fprintf (stderr, |
---|
718 | _("%s: option `%s' requires an argument\n"), |
---|
719 | argv[0], argv[optind - 1]); |
---|
720 | nextchar += strlen (nextchar); |
---|
721 | optopt = pfound->val; |
---|
722 | return optstring[0] == ':' ? ':' : '?'; |
---|
723 | } |
---|
724 | } |
---|
725 | nextchar += strlen (nextchar); |
---|
726 | if (longind != NULL) |
---|
727 | *longind = option_index; |
---|
728 | if (pfound->flag) |
---|
729 | { |
---|
730 | *(pfound->flag) = pfound->val; |
---|
731 | return 0; |
---|
732 | } |
---|
733 | return pfound->val; |
---|
734 | } |
---|
735 | |
---|
736 | /* Can't find it as a long option. If this is not getopt_long_only, |
---|
737 | or the option starts with '--' or is not a valid short |
---|
738 | option, then it's an error. |
---|
739 | Otherwise interpret it as a short option. */ |
---|
740 | if (!long_only || argv[optind][1] == '-' |
---|
741 | || my_index (optstring, *nextchar) == NULL) |
---|
742 | { |
---|
743 | if (opterr) |
---|
744 | { |
---|
745 | if (argv[optind][1] == '-') |
---|
746 | /* --option */ |
---|
747 | fprintf (stderr, _("%s: unrecognized option `--%s'\n"), |
---|
748 | argv[0], nextchar); |
---|
749 | else |
---|
750 | /* +option or -option */ |
---|
751 | fprintf (stderr, _("%s: unrecognized option `%c%s'\n"), |
---|
752 | argv[0], argv[optind][0], nextchar); |
---|
753 | } |
---|
754 | nextchar = (char *) ""; |
---|
755 | optind++; |
---|
756 | optopt = 0; |
---|
757 | return '?'; |
---|
758 | } |
---|
759 | } |
---|
760 | |
---|
761 | /* Look at and handle the next short option-character. */ |
---|
762 | |
---|
763 | { |
---|
764 | char c = *nextchar++; |
---|
765 | char *temp = my_index (optstring, c); |
---|
766 | |
---|
767 | /* Increment `optind' when we start to process its last character. */ |
---|
768 | if (*nextchar == '\0') |
---|
769 | ++optind; |
---|
770 | |
---|
771 | if (temp == NULL || c == ':') |
---|
772 | { |
---|
773 | if (opterr) |
---|
774 | { |
---|
775 | if (posixly_correct) |
---|
776 | /* 1003.2 specifies the format of this message. */ |
---|
777 | fprintf (stderr, _("%s: illegal option -- %c\n"), |
---|
778 | argv[0], c); |
---|
779 | else |
---|
780 | fprintf (stderr, _("%s: invalid option -- %c\n"), |
---|
781 | argv[0], c); |
---|
782 | } |
---|
783 | optopt = c; |
---|
784 | return '?'; |
---|
785 | } |
---|
786 | /* Convenience. Treat POSIX -W foo same as long option --foo */ |
---|
787 | if (temp[0] == 'W' && temp[1] == ';') |
---|
788 | { |
---|
789 | char *nameend; |
---|
790 | const struct option *p; |
---|
791 | const struct option *pfound = NULL; |
---|
792 | int exact = 0; |
---|
793 | int ambig = 0; |
---|
794 | int indfound = 0; |
---|
795 | int option_index; |
---|
796 | |
---|
797 | /* This is an option that requires an argument. */ |
---|
798 | if (*nextchar != '\0') |
---|
799 | { |
---|
800 | optarg = nextchar; |
---|
801 | /* If we end this ARGV-element by taking the rest as an arg, |
---|
802 | we must advance to the next element now. */ |
---|
803 | optind++; |
---|
804 | } |
---|
805 | else if (optind == argc) |
---|
806 | { |
---|
807 | if (opterr) |
---|
808 | { |
---|
809 | /* 1003.2 specifies the format of this message. */ |
---|
810 | fprintf (stderr, _("%s: option requires an argument -- %c\n"), |
---|
811 | argv[0], c); |
---|
812 | } |
---|
813 | optopt = c; |
---|
814 | if (optstring[0] == ':') |
---|
815 | c = ':'; |
---|
816 | else |
---|
817 | c = '?'; |
---|
818 | return c; |
---|
819 | } |
---|
820 | else |
---|
821 | /* We already incremented `optind' once; |
---|
822 | increment it again when taking next ARGV-elt as argument. */ |
---|
823 | optarg = argv[optind++]; |
---|
824 | |
---|
825 | /* optarg is now the argument, see if it's in the |
---|
826 | table of longopts. */ |
---|
827 | |
---|
828 | for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++) |
---|
829 | /* Do nothing. */ ; |
---|
830 | |
---|
831 | /* Test all long options for either exact match |
---|
832 | or abbreviated matches. */ |
---|
833 | for (p = longopts, option_index = 0; p->name; p++, option_index++) |
---|
834 | if (!strncmp (p->name, nextchar, nameend - nextchar)) |
---|
835 | { |
---|
836 | if ((unsigned int) (nameend - nextchar) == strlen (p->name)) |
---|
837 | { |
---|
838 | /* Exact match found. */ |
---|
839 | pfound = p; |
---|
840 | indfound = option_index; |
---|
841 | exact = 1; |
---|
842 | break; |
---|
843 | } |
---|
844 | else if (pfound == NULL) |
---|
845 | { |
---|
846 | /* First nonexact match found. */ |
---|
847 | pfound = p; |
---|
848 | indfound = option_index; |
---|
849 | } |
---|
850 | else |
---|
851 | /* Second or later nonexact match found. */ |
---|
852 | ambig = 1; |
---|
853 | } |
---|
854 | if (ambig && !exact) |
---|
855 | { |
---|
856 | if (opterr) |
---|
857 | fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"), |
---|
858 | argv[0], argv[optind]); |
---|
859 | nextchar += strlen (nextchar); |
---|
860 | optind++; |
---|
861 | return '?'; |
---|
862 | } |
---|
863 | if (pfound != NULL) |
---|
864 | { |
---|
865 | option_index = indfound; |
---|
866 | if (*nameend) |
---|
867 | { |
---|
868 | /* Don't test has_arg with >, because some C compilers don't |
---|
869 | allow it to be used on enums. */ |
---|
870 | if (pfound->has_arg) |
---|
871 | optarg = nameend + 1; |
---|
872 | else |
---|
873 | { |
---|
874 | if (opterr) |
---|
875 | fprintf (stderr, _("\ |
---|
876 | %s: option `-W %s' doesn't allow an argument\n"), |
---|
877 | argv[0], pfound->name); |
---|
878 | |
---|
879 | nextchar += strlen (nextchar); |
---|
880 | return '?'; |
---|
881 | } |
---|
882 | } |
---|
883 | else if (pfound->has_arg == 1) |
---|
884 | { |
---|
885 | if (optind < argc) |
---|
886 | optarg = argv[optind++]; |
---|
887 | else |
---|
888 | { |
---|
889 | if (opterr) |
---|
890 | fprintf (stderr, |
---|
891 | _("%s: option `%s' requires an argument\n"), |
---|
892 | argv[0], argv[optind - 1]); |
---|
893 | nextchar += strlen (nextchar); |
---|
894 | return optstring[0] == ':' ? ':' : '?'; |
---|
895 | } |
---|
896 | } |
---|
897 | nextchar += strlen (nextchar); |
---|
898 | if (longind != NULL) |
---|
899 | *longind = option_index; |
---|
900 | if (pfound->flag) |
---|
901 | { |
---|
902 | *(pfound->flag) = pfound->val; |
---|
903 | return 0; |
---|
904 | } |
---|
905 | return pfound->val; |
---|
906 | } |
---|
907 | nextchar = NULL; |
---|
908 | return 'W'; /* Let the application handle it. */ |
---|
909 | } |
---|
910 | if (temp[1] == ':') |
---|
911 | { |
---|
912 | if (temp[2] == ':') |
---|
913 | { |
---|
914 | /* This is an option that accepts an argument optionally. */ |
---|
915 | if (*nextchar != '\0') |
---|
916 | { |
---|
917 | optarg = nextchar; |
---|
918 | optind++; |
---|
919 | } |
---|
920 | else |
---|
921 | optarg = NULL; |
---|
922 | nextchar = NULL; |
---|
923 | } |
---|
924 | else |
---|
925 | { |
---|
926 | /* This is an option that requires an argument. */ |
---|
927 | if (*nextchar != '\0') |
---|
928 | { |
---|
929 | optarg = nextchar; |
---|
930 | /* If we end this ARGV-element by taking the rest as an arg, |
---|
931 | we must advance to the next element now. */ |
---|
932 | optind++; |
---|
933 | } |
---|
934 | else if (optind == argc) |
---|
935 | { |
---|
936 | if (opterr) |
---|
937 | { |
---|
938 | /* 1003.2 specifies the format of this message. */ |
---|
939 | fprintf (stderr, |
---|
940 | _("%s: option requires an argument -- %c\n"), |
---|
941 | argv[0], c); |
---|
942 | } |
---|
943 | optopt = c; |
---|
944 | if (optstring[0] == ':') |
---|
945 | c = ':'; |
---|
946 | else |
---|
947 | c = '?'; |
---|
948 | } |
---|
949 | else |
---|
950 | /* We already incremented `optind' once; |
---|
951 | increment it again when taking next ARGV-elt as argument. */ |
---|
952 | optarg = argv[optind++]; |
---|
953 | nextchar = NULL; |
---|
954 | } |
---|
955 | } |
---|
956 | return c; |
---|
957 | } |
---|
958 | } |
---|
959 | |
---|
960 | int |
---|
961 | getopt (argc, argv, optstring) |
---|
962 | int argc; |
---|
963 | char *const *argv; |
---|
964 | const char *optstring; |
---|
965 | { |
---|
966 | return _getopt_internal (argc, argv, optstring, |
---|
967 | (const struct option *) 0, |
---|
968 | (int *) 0, |
---|
969 | 0); |
---|
970 | } |
---|
971 | |
---|
972 | #endif /* Not ELIDE_CODE. */ |
---|
973 | |
---|
974 | #ifdef TEST |
---|
975 | |
---|
976 | /* Compile with -DTEST to make an executable for use in testing |
---|
977 | the above definition of `getopt'. */ |
---|
978 | |
---|
979 | int |
---|
980 | main (argc, argv) |
---|
981 | int argc; |
---|
982 | char **argv; |
---|
983 | { |
---|
984 | int c; |
---|
985 | int digit_optind = 0; |
---|
986 | |
---|
987 | while (1) |
---|
988 | { |
---|
989 | int this_option_optind = optind ? optind : 1; |
---|
990 | |
---|
991 | c = getopt (argc, argv, "abc:d:0123456789"); |
---|
992 | if (c == -1) |
---|
993 | break; |
---|
994 | |
---|
995 | switch (c) |
---|
996 | { |
---|
997 | case '0': |
---|
998 | case '1': |
---|
999 | case '2': |
---|
1000 | case '3': |
---|
1001 | case '4': |
---|
1002 | case '5': |
---|
1003 | case '6': |
---|
1004 | case '7': |
---|
1005 | case '8': |
---|
1006 | case '9': |
---|
1007 | if (digit_optind != 0 && digit_optind != this_option_optind) |
---|
1008 | printf ("digits occur in two different argv-elements.\n"); |
---|
1009 | digit_optind = this_option_optind; |
---|
1010 | printf ("option %c\n", c); |
---|
1011 | break; |
---|
1012 | |
---|
1013 | case 'a': |
---|
1014 | printf ("option a\n"); |
---|
1015 | break; |
---|
1016 | |
---|
1017 | case 'b': |
---|
1018 | printf ("option b\n"); |
---|
1019 | break; |
---|
1020 | |
---|
1021 | case 'c': |
---|
1022 | printf ("option c with value `%s'\n", optarg); |
---|
1023 | break; |
---|
1024 | |
---|
1025 | case '?': |
---|
1026 | break; |
---|
1027 | |
---|
1028 | default: |
---|
1029 | printf ("?? getopt returned character code 0%o ??\n", c); |
---|
1030 | } |
---|
1031 | } |
---|
1032 | |
---|
1033 | if (optind < argc) |
---|
1034 | { |
---|
1035 | printf ("non-option ARGV-elements: "); |
---|
1036 | while (optind < argc) |
---|
1037 | printf ("%s ", argv[optind++]); |
---|
1038 | printf ("\n"); |
---|
1039 | } |
---|
1040 | |
---|
1041 | exit (0); |
---|
1042 | } |
---|
1043 | |
---|
1044 | #endif /* TEST */ |
---|