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0
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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 drepper@gnu.org
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4 before changing it!
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5
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111
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6 Copyright (C) 1987-2017 Free Software Foundation, Inc.
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0
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7
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8 NOTE: This source is derived from an old version taken from the GNU C
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9 Library (glibc).
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10
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11 This program is free software; you can redistribute it and/or modify it
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12 under the terms of the GNU General Public License as published by the
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13 Free Software Foundation; either version 2, or (at your option) any
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14 later version.
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15
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16 This program is distributed in the hope that it will be useful,
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17 but WITHOUT ANY WARRANTY; without even the implied warranty of
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18 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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19 GNU General Public License for more details.
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20
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21 You should have received a copy of the GNU General Public License
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22 along with this program; if not, write to the Free Software
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23 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301,
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24 USA. */
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25
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26 /* This tells Alpha OSF/1 not to define a getopt prototype in <stdio.h>.
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27 Ditto for AIX 3.2 and <stdlib.h>. */
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28 #ifndef _NO_PROTO
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29 # define _NO_PROTO
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30 #endif
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31
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32 #ifdef HAVE_CONFIG_H
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33 # include <config.h>
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34 #endif
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35
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36 #if !defined __STDC__ || !__STDC__
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37 /* This is a separate conditional since some stdc systems
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38 reject `defined (const)'. */
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39 # ifndef const
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40 # define const
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41 # endif
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42 #endif
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43
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44 #include "ansidecl.h"
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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 # if (HAVE_LIBINTL_H && ENABLE_NLS) || defined _LIBC
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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 # if HAVE_STRING_H
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205 # include <string.h>
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206 # else
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207 # if HAVE_STRINGS_H
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208 # include <strings.h>
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209 # endif
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210 # endif
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211
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212 /* Avoid depending on library functions or files
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213 whose names are inconsistent. */
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214
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215 #if HAVE_STDLIB_H && HAVE_DECL_GETENV
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216 # include <stdlib.h>
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217 #elif !defined(getenv)
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218 # ifdef __cplusplus
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219 extern "C" {
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220 # endif /* __cplusplus */
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221 extern char *getenv (const char *);
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222 # ifdef __cplusplus
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223 }
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224 # endif /* __cplusplus */
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225 #endif
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226
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227 static char *
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228 my_index (const char *str, int chr)
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229 {
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230 while (*str)
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231 {
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232 if (*str == chr)
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233 return (char *) str;
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234 str++;
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235 }
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236 return 0;
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237 }
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238
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239 /* If using GCC, we can safely declare strlen this way.
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240 If not using GCC, it is ok not to declare it. */
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241 #ifdef __GNUC__
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242 /* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h.
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243 That was relevant to code that was here before. */
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244 # if (!defined __STDC__ || !__STDC__) && !defined strlen
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245 /* gcc with -traditional declares the built-in strlen to return int,
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246 and has done so at least since version 2.4.5. -- rms. */
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247 extern int strlen (const char *);
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248 # endif /* not __STDC__ */
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249 #endif /* __GNUC__ */
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250
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251 #endif /* not __GNU_LIBRARY__ */
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252
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253 /* Handle permutation of arguments. */
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254
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255 /* Describe the part of ARGV that contains non-options that have
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256 been skipped. `first_nonopt' is the index in ARGV of the first of them;
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257 `last_nonopt' is the index after the last of them. */
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258
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259 static int first_nonopt;
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260 static int last_nonopt;
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261
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262 #ifdef _LIBC
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263 /* Bash 2.0 gives us an environment variable containing flags
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264 indicating ARGV elements that should not be considered arguments. */
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265
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266 /* Defined in getopt_init.c */
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267 extern char *__getopt_nonoption_flags;
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268
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269 static int nonoption_flags_max_len;
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270 static int nonoption_flags_len;
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271
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272 static int original_argc;
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273 static char *const *original_argv;
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274
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275 /* Make sure the environment variable bash 2.0 puts in the environment
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276 is valid for the getopt call we must make sure that the ARGV passed
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277 to getopt is that one passed to the process. */
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278 static void
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279 __attribute__ ((unused))
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280 store_args_and_env (int argc, char *const *argv)
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281 {
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282 /* XXX This is no good solution. We should rather copy the args so
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283 that we can compare them later. But we must not use malloc(3). */
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284 original_argc = argc;
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285 original_argv = argv;
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286 }
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287 # ifdef text_set_element
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288 text_set_element (__libc_subinit, store_args_and_env);
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289 # endif /* text_set_element */
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290
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291 # define SWAP_FLAGS(ch1, ch2) \
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292 if (nonoption_flags_len > 0) \
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293 { \
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294 char __tmp = __getopt_nonoption_flags[ch1]; \
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295 __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \
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296 __getopt_nonoption_flags[ch2] = __tmp; \
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297 }
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298 #else /* !_LIBC */
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299 # define SWAP_FLAGS(ch1, ch2)
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300 #endif /* _LIBC */
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301
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302 /* Exchange two adjacent subsequences of ARGV.
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303 One subsequence is elements [first_nonopt,last_nonopt)
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304 which contains all the non-options that have been skipped so far.
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305 The other is elements [last_nonopt,optind), which contains all
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306 the options processed since those non-options were skipped.
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307
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308 `first_nonopt' and `last_nonopt' are relocated so that they describe
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309 the new indices of the non-options in ARGV after they are moved. */
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310
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311 #if defined __STDC__ && __STDC__
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312 static void exchange (char **);
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313 #endif
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314
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315 static void
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316 exchange (char **argv)
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317 {
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318 int bottom = first_nonopt;
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319 int middle = last_nonopt;
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320 int top = optind;
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321 char *tem;
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322
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323 /* Exchange the shorter segment with the far end of the longer segment.
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324 That puts the shorter segment into the right place.
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325 It leaves the longer segment in the right place overall,
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326 but it consists of two parts that need to be swapped next. */
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327
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328 #ifdef _LIBC
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329 /* First make sure the handling of the `__getopt_nonoption_flags'
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330 string can work normally. Our top argument must be in the range
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331 of the string. */
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332 if (nonoption_flags_len > 0 && top >= nonoption_flags_max_len)
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333 {
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334 /* We must extend the array. The user plays games with us and
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335 presents new arguments. */
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336 char *new_str = (char *) malloc (top + 1);
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337 if (new_str == NULL)
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338 nonoption_flags_len = nonoption_flags_max_len = 0;
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339 else
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340 {
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341 memset (mempcpy (new_str, __getopt_nonoption_flags,
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342 nonoption_flags_max_len),
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343 '\0', top + 1 - nonoption_flags_max_len);
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344 nonoption_flags_max_len = top + 1;
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345 __getopt_nonoption_flags = new_str;
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346 }
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347 }
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348 #endif
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349
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350 while (top > middle && middle > bottom)
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351 {
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352 if (top - middle > middle - bottom)
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353 {
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354 /* Bottom segment is the short one. */
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355 int len = middle - bottom;
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356 register int i;
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357
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358 /* Swap it with the top part of the top segment. */
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359 for (i = 0; i < len; i++)
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360 {
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361 tem = argv[bottom + i];
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362 argv[bottom + i] = argv[top - (middle - bottom) + i];
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363 argv[top - (middle - bottom) + i] = tem;
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364 SWAP_FLAGS (bottom + i, top - (middle - bottom) + i);
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365 }
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366 /* Exclude the moved bottom segment from further swapping. */
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367 top -= len;
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368 }
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369 else
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370 {
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371 /* Top segment is the short one. */
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372 int len = top - middle;
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373 register int i;
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374
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375 /* Swap it with the bottom part of the bottom segment. */
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376 for (i = 0; i < len; i++)
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377 {
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378 tem = argv[bottom + i];
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379 argv[bottom + i] = argv[middle + i];
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380 argv[middle + i] = tem;
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381 SWAP_FLAGS (bottom + i, middle + i);
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382 }
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383 /* Exclude the moved top segment from further swapping. */
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384 bottom += len;
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385 }
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386 }
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387
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388 /* Update records for the slots the non-options now occupy. */
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389
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390 first_nonopt += (optind - last_nonopt);
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391 last_nonopt = optind;
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392 }
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393
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394 /* Initialize the internal data when the first call is made. */
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395
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396 #if defined __STDC__ && __STDC__
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397 static const char *_getopt_initialize (int, char *const *, const char *);
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398 #endif
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399 static const char *
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400 _getopt_initialize (int argc ATTRIBUTE_UNUSED,
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401 char *const *argv ATTRIBUTE_UNUSED,
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402 const char *optstring)
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403 {
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404 /* Start processing options with ARGV-element 1 (since ARGV-element 0
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405 is the program name); the sequence of previously skipped
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406 non-option ARGV-elements is empty. */
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407
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408 first_nonopt = last_nonopt = optind;
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409
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410 nextchar = NULL;
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411
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412 posixly_correct = getenv ("POSIXLY_CORRECT");
|
|
|
413
|
|
|
414 /* Determine how to handle the ordering of options and nonoptions. */
|
|
|
415
|
|
|
416 if (optstring[0] == '-')
|
|
|
417 {
|
|
|
418 ordering = RETURN_IN_ORDER;
|
|
|
419 ++optstring;
|
|
|
420 }
|
|
|
421 else if (optstring[0] == '+')
|
|
|
422 {
|
|
|
423 ordering = REQUIRE_ORDER;
|
|
|
424 ++optstring;
|
|
|
425 }
|
|
|
426 else if (posixly_correct != NULL)
|
|
|
427 ordering = REQUIRE_ORDER;
|
|
|
428 else
|
|
|
429 ordering = PERMUTE;
|
|
|
430
|
|
|
431 #ifdef _LIBC
|
|
|
432 if (posixly_correct == NULL
|
|
|
433 && argc == original_argc && argv == original_argv)
|
|
|
434 {
|
|
|
435 if (nonoption_flags_max_len == 0)
|
|
|
436 {
|
|
|
437 if (__getopt_nonoption_flags == NULL
|
|
|
438 || __getopt_nonoption_flags[0] == '\0')
|
|
|
439 nonoption_flags_max_len = -1;
|
|
|
440 else
|
|
|
441 {
|
|
|
442 const char *orig_str = __getopt_nonoption_flags;
|
|
|
443 int len = nonoption_flags_max_len = strlen (orig_str);
|
|
|
444 if (nonoption_flags_max_len < argc)
|
|
|
445 nonoption_flags_max_len = argc;
|
|
|
446 __getopt_nonoption_flags =
|
|
|
447 (char *) malloc (nonoption_flags_max_len);
|
|
|
448 if (__getopt_nonoption_flags == NULL)
|
|
|
449 nonoption_flags_max_len = -1;
|
|
|
450 else
|
|
|
451 memset (mempcpy (__getopt_nonoption_flags, orig_str, len),
|
|
|
452 '\0', nonoption_flags_max_len - len);
|
|
|
453 }
|
|
|
454 }
|
|
|
455 nonoption_flags_len = nonoption_flags_max_len;
|
|
|
456 }
|
|
|
457 else
|
|
|
458 nonoption_flags_len = 0;
|
|
|
459 #endif
|
|
|
460
|
|
|
461 return optstring;
|
|
|
462 }
|
|
|
463
|
|
|
464 /* Scan elements of ARGV (whose length is ARGC) for option characters
|
|
|
465 given in OPTSTRING.
|
|
|
466
|
|
|
467 If an element of ARGV starts with '-', and is not exactly "-" or "--",
|
|
|
468 then it is an option element. The characters of this element
|
|
|
469 (aside from the initial '-') are option characters. If `getopt'
|
|
|
470 is called repeatedly, it returns successively each of the option characters
|
|
|
471 from each of the option elements.
|
|
|
472
|
|
|
473 If `getopt' finds another option character, it returns that character,
|
|
|
474 updating `optind' and `nextchar' so that the next call to `getopt' can
|
|
|
475 resume the scan with the following option character or ARGV-element.
|
|
|
476
|
|
|
477 If there are no more option characters, `getopt' returns -1.
|
|
|
478 Then `optind' is the index in ARGV of the first ARGV-element
|
|
|
479 that is not an option. (The ARGV-elements have been permuted
|
|
|
480 so that those that are not options now come last.)
|
|
|
481
|
|
|
482 OPTSTRING is a string containing the legitimate option characters.
|
|
|
483 If an option character is seen that is not listed in OPTSTRING,
|
|
|
484 return '?' after printing an error message. If you set `opterr' to
|
|
|
485 zero, the error message is suppressed but we still return '?'.
|
|
|
486
|
|
|
487 If a char in OPTSTRING is followed by a colon, that means it wants an arg,
|
|
|
488 so the following text in the same ARGV-element, or the text of the following
|
|
|
489 ARGV-element, is returned in `optarg'. Two colons mean an option that
|
|
|
490 wants an optional arg; if there is text in the current ARGV-element,
|
|
|
491 it is returned in `optarg', otherwise `optarg' is set to zero.
|
|
|
492
|
|
|
493 If OPTSTRING starts with `-' or `+', it requests different methods of
|
|
|
494 handling the non-option ARGV-elements.
|
|
|
495 See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above.
|
|
|
496
|
|
|
497 Long-named options begin with `--' instead of `-'.
|
|
|
498 Their names may be abbreviated as long as the abbreviation is unique
|
|
|
499 or is an exact match for some defined option. If they have an
|
|
|
500 argument, it follows the option name in the same ARGV-element, separated
|
|
|
501 from the option name by a `=', or else the in next ARGV-element.
|
|
|
502 When `getopt' finds a long-named option, it returns 0 if that option's
|
|
|
503 `flag' field is nonzero, the value of the option's `val' field
|
|
|
504 if the `flag' field is zero.
|
|
|
505
|
|
|
506 The elements of ARGV aren't really const, because we permute them.
|
|
|
507 But we pretend they're const in the prototype to be compatible
|
|
|
508 with other systems.
|
|
|
509
|
|
|
510 LONGOPTS is a vector of `struct option' terminated by an
|
|
|
511 element containing a name which is zero.
|
|
|
512
|
|
|
513 LONGIND returns the index in LONGOPT of the long-named option found.
|
|
|
514 It is only valid when a long-named option has been found by the most
|
|
|
515 recent call.
|
|
|
516
|
|
|
517 If LONG_ONLY is nonzero, '-' as well as '--' can introduce
|
|
|
518 long-named options. */
|
|
|
519
|
|
|
520 int
|
|
|
521 _getopt_internal (int argc, char *const *argv, const char *optstring,
|
|
|
522 const struct option *longopts,
|
|
|
523 int *longind, int long_only)
|
|
|
524 {
|
|
|
525 optarg = NULL;
|
|
|
526
|
|
|
527 if (optind == 0 || !__getopt_initialized)
|
|
|
528 {
|
|
|
529 if (optind == 0)
|
|
|
530 optind = 1; /* Don't scan ARGV[0], the program name. */
|
|
|
531 optstring = _getopt_initialize (argc, argv, optstring);
|
|
|
532 __getopt_initialized = 1;
|
|
|
533 }
|
|
|
534
|
|
|
535 /* Test whether ARGV[optind] points to a non-option argument.
|
|
|
536 Either it does not have option syntax, or there is an environment flag
|
|
|
537 from the shell indicating it is not an option. The later information
|
|
|
538 is only used when the used in the GNU libc. */
|
|
|
539 #ifdef _LIBC
|
|
|
540 # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0' \
|
|
|
541 || (optind < nonoption_flags_len \
|
|
|
542 && __getopt_nonoption_flags[optind] == '1'))
|
|
|
543 #else
|
|
|
544 # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0')
|
|
|
545 #endif
|
|
|
546
|
|
|
547 if (nextchar == NULL || *nextchar == '\0')
|
|
|
548 {
|
|
|
549 /* Advance to the next ARGV-element. */
|
|
|
550
|
|
|
551 /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been
|
|
|
552 moved back by the user (who may also have changed the arguments). */
|
|
|
553 if (last_nonopt > optind)
|
|
|
554 last_nonopt = optind;
|
|
|
555 if (first_nonopt > optind)
|
|
|
556 first_nonopt = optind;
|
|
|
557
|
|
|
558 if (ordering == PERMUTE)
|
|
|
559 {
|
|
|
560 /* If we have just processed some options following some non-options,
|
|
|
561 exchange them so that the options come first. */
|
|
|
562
|
|
|
563 if (first_nonopt != last_nonopt && last_nonopt != optind)
|
|
|
564 exchange ((char **) argv);
|
|
|
565 else if (last_nonopt != optind)
|
|
|
566 first_nonopt = optind;
|
|
|
567
|
|
|
568 /* Skip any additional non-options
|
|
|
569 and extend the range of non-options previously skipped. */
|
|
|
570
|
|
|
571 while (optind < argc && NONOPTION_P)
|
|
|
572 optind++;
|
|
|
573 last_nonopt = optind;
|
|
|
574 }
|
|
|
575
|
|
|
576 /* The special ARGV-element `--' means premature end of options.
|
|
|
577 Skip it like a null option,
|
|
|
578 then exchange with previous non-options as if it were an option,
|
|
|
579 then skip everything else like a non-option. */
|
|
|
580
|
|
|
581 if (optind != argc && !strcmp (argv[optind], "--"))
|
|
|
582 {
|
|
|
583 optind++;
|
|
|
584
|
|
|
585 if (first_nonopt != last_nonopt && last_nonopt != optind)
|
|
|
586 exchange ((char **) argv);
|
|
|
587 else if (first_nonopt == last_nonopt)
|
|
|
588 first_nonopt = optind;
|
|
|
589 last_nonopt = argc;
|
|
|
590
|
|
|
591 optind = argc;
|
|
|
592 }
|
|
|
593
|
|
|
594 /* If we have done all the ARGV-elements, stop the scan
|
|
|
595 and back over any non-options that we skipped and permuted. */
|
|
|
596
|
|
|
597 if (optind == argc)
|
|
|
598 {
|
|
|
599 /* Set the next-arg-index to point at the non-options
|
|
|
600 that we previously skipped, so the caller will digest them. */
|
|
|
601 if (first_nonopt != last_nonopt)
|
|
|
602 optind = first_nonopt;
|
|
|
603 return -1;
|
|
|
604 }
|
|
|
605
|
|
|
606 /* If we have come to a non-option and did not permute it,
|
|
|
607 either stop the scan or describe it to the caller and pass it by. */
|
|
|
608
|
|
|
609 if (NONOPTION_P)
|
|
|
610 {
|
|
|
611 if (ordering == REQUIRE_ORDER)
|
|
|
612 return -1;
|
|
|
613 optarg = argv[optind++];
|
|
|
614 return 1;
|
|
|
615 }
|
|
|
616
|
|
|
617 /* We have found another option-ARGV-element.
|
|
|
618 Skip the initial punctuation. */
|
|
|
619
|
|
|
620 nextchar = (argv[optind] + 1
|
|
|
621 + (longopts != NULL && argv[optind][1] == '-'));
|
|
|
622 }
|
|
|
623
|
|
|
624 /* Decode the current option-ARGV-element. */
|
|
|
625
|
|
|
626 /* Check whether the ARGV-element is a long option.
|
|
|
627
|
|
|
628 If long_only and the ARGV-element has the form "-f", where f is
|
|
|
629 a valid short option, don't consider it an abbreviated form of
|
|
|
630 a long option that starts with f. Otherwise there would be no
|
|
|
631 way to give the -f short option.
|
|
|
632
|
|
|
633 On the other hand, if there's a long option "fubar" and
|
|
|
634 the ARGV-element is "-fu", do consider that an abbreviation of
|
|
|
635 the long option, just like "--fu", and not "-f" with arg "u".
|
|
|
636
|
|
|
637 This distinction seems to be the most useful approach. */
|
|
|
638
|
|
|
639 if (longopts != NULL
|
|
|
640 && (argv[optind][1] == '-'
|
|
|
641 || (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1])))))
|
|
|
642 {
|
|
|
643 char *nameend;
|
|
|
644 const struct option *p;
|
|
|
645 const struct option *pfound = NULL;
|
|
|
646 int exact = 0;
|
|
|
647 int ambig = 0;
|
|
|
648 int indfound = -1;
|
|
|
649 int option_index;
|
|
|
650
|
|
|
651 for (nameend = nextchar; *nameend && *nameend != '='; nameend++)
|
|
|
652 /* Do nothing. */ ;
|
|
|
653
|
|
|
654 /* Test all long options for either exact match
|
|
|
655 or abbreviated matches. */
|
|
|
656 for (p = longopts, option_index = 0; p->name; p++, option_index++)
|
|
|
657 if (!strncmp (p->name, nextchar, nameend - nextchar))
|
|
|
658 {
|
|
|
659 if ((unsigned int) (nameend - nextchar)
|
|
|
660 == (unsigned int) strlen (p->name))
|
|
|
661 {
|
|
|
662 /* Exact match found. */
|
|
|
663 pfound = p;
|
|
|
664 indfound = option_index;
|
|
|
665 exact = 1;
|
|
|
666 break;
|
|
|
667 }
|
|
|
668 else if (pfound == NULL)
|
|
|
669 {
|
|
|
670 /* First nonexact match found. */
|
|
|
671 pfound = p;
|
|
|
672 indfound = option_index;
|
|
|
673 }
|
|
|
674 else
|
|
|
675 /* Second or later nonexact match found. */
|
|
|
676 ambig = 1;
|
|
|
677 }
|
|
|
678
|
|
|
679 if (ambig && !exact)
|
|
|
680 {
|
|
|
681 if (opterr)
|
|
|
682 fprintf (stderr, _("%s: option `%s' is ambiguous\n"),
|
|
|
683 argv[0], argv[optind]);
|
|
|
684 nextchar += strlen (nextchar);
|
|
|
685 optind++;
|
|
|
686 optopt = 0;
|
|
|
687 return '?';
|
|
|
688 }
|
|
|
689
|
|
|
690 if (pfound != NULL)
|
|
|
691 {
|
|
|
692 option_index = indfound;
|
|
|
693 optind++;
|
|
|
694 if (*nameend)
|
|
|
695 {
|
|
|
696 /* Don't test has_arg with >, because some C compilers don't
|
|
|
697 allow it to be used on enums. */
|
|
|
698 if (pfound->has_arg)
|
|
|
699 optarg = nameend + 1;
|
|
|
700 else
|
|
|
701 {
|
|
|
702 if (opterr)
|
|
|
703 {
|
|
|
704 if (argv[optind - 1][1] == '-')
|
|
|
705 /* --option */
|
|
|
706 fprintf (stderr,
|
|
|
707 _("%s: option `--%s' doesn't allow an argument\n"),
|
|
|
708 argv[0], pfound->name);
|
|
|
709 else
|
|
|
710 /* +option or -option */
|
|
|
711 fprintf (stderr,
|
|
|
712 _("%s: option `%c%s' doesn't allow an argument\n"),
|
|
|
713 argv[0], argv[optind - 1][0], pfound->name);
|
|
|
714
|
|
|
715 nextchar += strlen (nextchar);
|
|
|
716
|
|
|
717 optopt = pfound->val;
|
|
|
718 return '?';
|
|
|
719 }
|
|
|
720 }
|
|
|
721 }
|
|
|
722 else if (pfound->has_arg == 1)
|
|
|
723 {
|
|
|
724 if (optind < argc)
|
|
|
725 optarg = argv[optind++];
|
|
|
726 else
|
|
|
727 {
|
|
|
728 if (opterr)
|
|
|
729 fprintf (stderr,
|
|
|
730 _("%s: option `%s' requires an argument\n"),
|
|
|
731 argv[0], argv[optind - 1]);
|
|
|
732 nextchar += strlen (nextchar);
|
|
|
733 optopt = pfound->val;
|
|
|
734 return optstring[0] == ':' ? ':' : '?';
|
|
|
735 }
|
|
|
736 }
|
|
|
737 nextchar += strlen (nextchar);
|
|
|
738 if (longind != NULL)
|
|
|
739 *longind = option_index;
|
|
|
740 if (pfound->flag)
|
|
|
741 {
|
|
|
742 *(pfound->flag) = pfound->val;
|
|
|
743 return 0;
|
|
|
744 }
|
|
|
745 return pfound->val;
|
|
|
746 }
|
|
|
747
|
|
|
748 /* Can't find it as a long option. If this is not getopt_long_only,
|
|
|
749 or the option starts with '--' or is not a valid short
|
|
|
750 option, then it's an error.
|
|
|
751 Otherwise interpret it as a short option. */
|
|
|
752 if (!long_only || argv[optind][1] == '-'
|
|
|
753 || my_index (optstring, *nextchar) == NULL)
|
|
|
754 {
|
|
|
755 if (opterr)
|
|
|
756 {
|
|
|
757 if (argv[optind][1] == '-')
|
|
|
758 /* --option */
|
|
|
759 fprintf (stderr, _("%s: unrecognized option `--%s'\n"),
|
|
|
760 argv[0], nextchar);
|
|
|
761 else
|
|
|
762 /* +option or -option */
|
|
|
763 fprintf (stderr, _("%s: unrecognized option `%c%s'\n"),
|
|
|
764 argv[0], argv[optind][0], nextchar);
|
|
|
765 }
|
|
|
766 nextchar = (char *) "";
|
|
|
767 optind++;
|
|
|
768 optopt = 0;
|
|
|
769 return '?';
|
|
|
770 }
|
|
|
771 }
|
|
|
772
|
|
|
773 /* Look at and handle the next short option-character. */
|
|
|
774
|
|
|
775 {
|
|
|
776 char c = *nextchar++;
|
|
|
777 char *temp = my_index (optstring, c);
|
|
|
778
|
|
|
779 /* Increment `optind' when we start to process its last character. */
|
|
|
780 if (*nextchar == '\0')
|
|
|
781 ++optind;
|
|
|
782
|
|
|
783 if (temp == NULL || c == ':')
|
|
|
784 {
|
|
|
785 if (opterr)
|
|
|
786 {
|
|
|
787 if (posixly_correct)
|
|
|
788 /* 1003.2 specifies the format of this message. */
|
|
|
789 fprintf (stderr, _("%s: illegal option -- %c\n"),
|
|
|
790 argv[0], c);
|
|
|
791 else
|
|
|
792 fprintf (stderr, _("%s: invalid option -- %c\n"),
|
|
|
793 argv[0], c);
|
|
|
794 }
|
|
|
795 optopt = c;
|
|
|
796 return '?';
|
|
|
797 }
|
|
|
798 /* Convenience. Treat POSIX -W foo same as long option --foo */
|
|
|
799 if (temp[0] == 'W' && temp[1] == ';')
|
|
|
800 {
|
|
|
801 char *nameend;
|
|
|
802 const struct option *p;
|
|
|
803 const struct option *pfound = NULL;
|
|
|
804 int exact = 0;
|
|
|
805 int ambig = 0;
|
|
|
806 int indfound = 0;
|
|
|
807 int option_index;
|
|
|
808
|
|
|
809 /* This is an option that requires an argument. */
|
|
|
810 if (*nextchar != '\0')
|
|
|
811 {
|
|
|
812 optarg = nextchar;
|
|
|
813 /* If we end this ARGV-element by taking the rest as an arg,
|
|
|
814 we must advance to the next element now. */
|
|
|
815 optind++;
|
|
|
816 }
|
|
|
817 else if (optind == argc)
|
|
|
818 {
|
|
|
819 if (opterr)
|
|
|
820 {
|
|
|
821 /* 1003.2 specifies the format of this message. */
|
|
|
822 fprintf (stderr, _("%s: option requires an argument -- %c\n"),
|
|
|
823 argv[0], c);
|
|
|
824 }
|
|
|
825 optopt = c;
|
|
|
826 if (optstring[0] == ':')
|
|
|
827 c = ':';
|
|
|
828 else
|
|
|
829 c = '?';
|
|
|
830 return c;
|
|
|
831 }
|
|
|
832 else
|
|
|
833 /* We already incremented `optind' once;
|
|
|
834 increment it again when taking next ARGV-elt as argument. */
|
|
|
835 optarg = argv[optind++];
|
|
|
836
|
|
|
837 /* optarg is now the argument, see if it's in the
|
|
|
838 table of longopts. */
|
|
|
839
|
|
|
840 for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++)
|
|
|
841 /* Do nothing. */ ;
|
|
|
842
|
|
|
843 /* Test all long options for either exact match
|
|
|
844 or abbreviated matches. */
|
|
|
845 for (p = longopts, option_index = 0; p->name; p++, option_index++)
|
|
|
846 if (!strncmp (p->name, nextchar, nameend - nextchar))
|
|
|
847 {
|
|
|
848 if ((unsigned int) (nameend - nextchar) == strlen (p->name))
|
|
|
849 {
|
|
|
850 /* Exact match found. */
|
|
|
851 pfound = p;
|
|
|
852 indfound = option_index;
|
|
|
853 exact = 1;
|
|
|
854 break;
|
|
|
855 }
|
|
|
856 else if (pfound == NULL)
|
|
|
857 {
|
|
|
858 /* First nonexact match found. */
|
|
|
859 pfound = p;
|
|
|
860 indfound = option_index;
|
|
|
861 }
|
|
|
862 else
|
|
|
863 /* Second or later nonexact match found. */
|
|
|
864 ambig = 1;
|
|
|
865 }
|
|
|
866 if (ambig && !exact)
|
|
|
867 {
|
|
|
868 if (opterr)
|
|
|
869 fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"),
|
|
|
870 argv[0], argv[optind]);
|
|
|
871 nextchar += strlen (nextchar);
|
|
|
872 optind++;
|
|
|
873 return '?';
|
|
|
874 }
|
|
|
875 if (pfound != NULL)
|
|
|
876 {
|
|
|
877 option_index = indfound;
|
|
|
878 if (*nameend)
|
|
|
879 {
|
|
|
880 /* Don't test has_arg with >, because some C compilers don't
|
|
|
881 allow it to be used on enums. */
|
|
|
882 if (pfound->has_arg)
|
|
|
883 optarg = nameend + 1;
|
|
|
884 else
|
|
|
885 {
|
|
|
886 if (opterr)
|
|
|
887 fprintf (stderr, _("\
|
|
|
888 %s: option `-W %s' doesn't allow an argument\n"),
|
|
|
889 argv[0], pfound->name);
|
|
|
890
|
|
|
891 nextchar += strlen (nextchar);
|
|
|
892 return '?';
|
|
|
893 }
|
|
|
894 }
|
|
|
895 else if (pfound->has_arg == 1)
|
|
|
896 {
|
|
|
897 if (optind < argc)
|
|
|
898 optarg = argv[optind++];
|
|
|
899 else
|
|
|
900 {
|
|
|
901 if (opterr)
|
|
|
902 fprintf (stderr,
|
|
|
903 _("%s: option `%s' requires an argument\n"),
|
|
|
904 argv[0], argv[optind - 1]);
|
|
|
905 nextchar += strlen (nextchar);
|
|
|
906 return optstring[0] == ':' ? ':' : '?';
|
|
|
907 }
|
|
|
908 }
|
|
|
909 nextchar += strlen (nextchar);
|
|
|
910 if (longind != NULL)
|
|
|
911 *longind = option_index;
|
|
|
912 if (pfound->flag)
|
|
|
913 {
|
|
|
914 *(pfound->flag) = pfound->val;
|
|
|
915 return 0;
|
|
|
916 }
|
|
|
917 return pfound->val;
|
|
|
918 }
|
|
|
919 nextchar = NULL;
|
|
|
920 return 'W'; /* Let the application handle it. */
|
|
|
921 }
|
|
|
922 if (temp[1] == ':')
|
|
|
923 {
|
|
|
924 if (temp[2] == ':')
|
|
|
925 {
|
|
|
926 /* This is an option that accepts an argument optionally. */
|
|
|
927 if (*nextchar != '\0')
|
|
|
928 {
|
|
|
929 optarg = nextchar;
|
|
|
930 optind++;
|
|
|
931 }
|
|
|
932 else
|
|
|
933 optarg = NULL;
|
|
|
934 nextchar = NULL;
|
|
|
935 }
|
|
|
936 else
|
|
|
937 {
|
|
|
938 /* This is an option that requires an argument. */
|
|
|
939 if (*nextchar != '\0')
|
|
|
940 {
|
|
|
941 optarg = nextchar;
|
|
|
942 /* If we end this ARGV-element by taking the rest as an arg,
|
|
|
943 we must advance to the next element now. */
|
|
|
944 optind++;
|
|
|
945 }
|
|
|
946 else if (optind == argc)
|
|
|
947 {
|
|
|
948 if (opterr)
|
|
|
949 {
|
|
|
950 /* 1003.2 specifies the format of this message. */
|
|
|
951 fprintf (stderr,
|
|
|
952 _("%s: option requires an argument -- %c\n"),
|
|
|
953 argv[0], c);
|
|
|
954 }
|
|
|
955 optopt = c;
|
|
|
956 if (optstring[0] == ':')
|
|
|
957 c = ':';
|
|
|
958 else
|
|
|
959 c = '?';
|
|
|
960 }
|
|
|
961 else
|
|
|
962 /* We already incremented `optind' once;
|
|
|
963 increment it again when taking next ARGV-elt as argument. */
|
|
|
964 optarg = argv[optind++];
|
|
|
965 nextchar = NULL;
|
|
|
966 }
|
|
|
967 }
|
|
|
968 return c;
|
|
|
969 }
|
|
|
970 }
|
|
|
971
|
|
|
972 int
|
|
|
973 getopt (int argc, char *const *argv, const char *optstring)
|
|
|
974 {
|
|
|
975 return _getopt_internal (argc, argv, optstring,
|
|
|
976 (const struct option *) 0,
|
|
|
977 (int *) 0,
|
|
|
978 0);
|
|
|
979 }
|
|
|
980
|
|
|
981 #endif /* Not ELIDE_CODE. */
|
|
|
982
|
|
|
983 #ifdef TEST
|
|
|
984
|
|
|
985 /* Compile with -DTEST to make an executable for use in testing
|
|
|
986 the above definition of `getopt'. */
|
|
|
987
|
|
|
988 int
|
|
|
989 main (int argc, char **argv)
|
|
|
990 {
|
|
|
991 int c;
|
|
|
992 int digit_optind = 0;
|
|
|
993
|
|
|
994 while (1)
|
|
|
995 {
|
|
|
996 int this_option_optind = optind ? optind : 1;
|
|
|
997
|
|
|
998 c = getopt (argc, argv, "abc:d:0123456789");
|
|
|
999 if (c == -1)
|
|
|
1000 break;
|
|
|
1001
|
|
|
1002 switch (c)
|
|
|
1003 {
|
|
|
1004 case '0':
|
|
|
1005 case '1':
|
|
|
1006 case '2':
|
|
|
1007 case '3':
|
|
|
1008 case '4':
|
|
|
1009 case '5':
|
|
|
1010 case '6':
|
|
|
1011 case '7':
|
|
|
1012 case '8':
|
|
|
1013 case '9':
|
|
|
1014 if (digit_optind != 0 && digit_optind != this_option_optind)
|
|
|
1015 printf ("digits occur in two different argv-elements.\n");
|
|
|
1016 digit_optind = this_option_optind;
|
|
|
1017 printf ("option %c\n", c);
|
|
|
1018 break;
|
|
|
1019
|
|
|
1020 case 'a':
|
|
|
1021 printf ("option a\n");
|
|
|
1022 break;
|
|
|
1023
|
|
|
1024 case 'b':
|
|
|
1025 printf ("option b\n");
|
|
|
1026 break;
|
|
|
1027
|
|
|
1028 case 'c':
|
|
|
1029 printf ("option c with value `%s'\n", optarg);
|
|
|
1030 break;
|
|
|
1031
|
|
|
1032 case '?':
|
|
|
1033 break;
|
|
|
1034
|
|
|
1035 default:
|
|
|
1036 printf ("?? getopt returned character code 0%o ??\n", c);
|
|
|
1037 }
|
|
|
1038 }
|
|
|
1039
|
|
|
1040 if (optind < argc)
|
|
|
1041 {
|
|
|
1042 printf ("non-option ARGV-elements: ");
|
|
|
1043 while (optind < argc)
|
|
|
1044 printf ("%s ", argv[optind++]);
|
|
|
1045 printf ("\n");
|
|
|
1046 }
|
|
|
1047
|
|
|
1048 exit (0);
|
|
|
1049 }
|
|
|
1050
|
|
|
1051 #endif /* TEST */
|
