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5191 | serge | 1 | /* Getopt for GNU. |
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 | |||
6 | Copyright (C) 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, |
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7 | 1996, 1997, 1998, 2005 Free Software Foundation, Inc. |
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8 | |||
9 | NOTE: This source is derived from an old version taken from the GNU C |
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10 | Library (glibc). |
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11 | |||
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 | |||
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 | |||
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., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, |
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25 | USA. */ |
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26 | |||
27 | /* This tells Alpha OSF/1 not to define a getopt prototype in |
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28 | Ditto for AIX 3.2 and |
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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 | |||
33 | #ifdef HAVE_CONFIG_H |
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34 | # include |
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35 | #endif |
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36 | |||
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 | |||
45 | #include "ansidecl.h" |
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46 | #include |
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47 | |||
48 | /* Comment out all this code if we are using the GNU C Library, and are not |
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49 | actually compiling the library itself. This code is part of the GNU C |
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50 | Library, but also included in many other GNU distributions. Compiling |
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51 | and linking in this code is a waste when using the GNU C library |
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52 | (especially if it is a shared library). Rather than having every GNU |
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53 | program understand `configure --with-gnu-libc' and omit the object files, |
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54 | it is simpler to just do this in the source for each such file. */ |
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55 | |||
56 | #define GETOPT_INTERFACE_VERSION 2 |
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57 | #if !defined _LIBC && defined __GLIBC__ && __GLIBC__ >= 2 |
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58 | # include |
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59 | # if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION |
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60 | # define ELIDE_CODE |
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61 | # endif |
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62 | #endif |
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63 | |||
64 | #ifndef ELIDE_CODE |
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65 | |||
66 | |||
67 | /* This needs to come after some library #include |
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68 | to get __GNU_LIBRARY__ defined. */ |
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69 | #ifdef __GNU_LIBRARY__ |
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70 | /* Don't include stdlib.h for non-GNU C libraries because some of them |
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71 | contain conflicting prototypes for getopt. */ |
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72 | # include |
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73 | # include |
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74 | #endif /* GNU C library. */ |
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75 | |||
76 | #ifdef VMS |
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77 | # include |
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78 | # if HAVE_STRING_H - 0 |
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79 | # include |
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80 | # endif |
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81 | #endif |
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82 | |||
83 | |||
84 | # define _(msgid) (msgid) |
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85 | |||
86 | /* This version of `getopt' appears to the caller like standard Unix `getopt' |
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87 | but it behaves differently for the user, since it allows the user |
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88 | to intersperse the options with the other arguments. |
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89 | |||
90 | As `getopt' works, it permutes the elements of ARGV so that, |
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91 | when it is done, all the options precede everything else. Thus |
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92 | all application programs are extended to handle flexible argument order. |
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93 | |||
94 | Setting the environment variable POSIXLY_CORRECT disables permutation. |
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95 | Then the behavior is completely standard. |
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96 | |||
97 | GNU application programs can use a third alternative mode in which |
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98 | they can distinguish the relative order of options and other arguments. */ |
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99 | |||
100 | #include "getopt.h" |
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101 | |||
102 | /* For communication from `getopt' to the caller. |
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103 | When `getopt' finds an option that takes an argument, |
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104 | the argument value is returned here. |
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105 | Also, when `ordering' is RETURN_IN_ORDER, |
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106 | each non-option ARGV-element is returned here. */ |
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107 | |||
108 | char *optarg = NULL; |
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109 | |||
110 | /* Index in ARGV of the next element to be scanned. |
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111 | This is used for communication to and from the caller |
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112 | and for communication between successive calls to `getopt'. |
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113 | |||
114 | On entry to `getopt', zero means this is the first call; initialize. |
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115 | |||
116 | When `getopt' returns -1, this is the index of the first of the |
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117 | non-option elements that the caller should itself scan. |
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118 | |||
119 | Otherwise, `optind' communicates from one call to the next |
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120 | how much of ARGV has been scanned so far. */ |
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121 | |||
122 | /* 1003.2 says this must be 1 before any call. */ |
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123 | int optind = 1; |
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124 | |||
125 | /* Formerly, initialization of getopt depended on optind==0, which |
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126 | causes problems with re-calling getopt as programs generally don't |
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127 | know that. */ |
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128 | |||
129 | int __getopt_initialized = 0; |
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130 | |||
131 | /* The next char to be scanned in the option-element |
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132 | in which the last option character we returned was found. |
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133 | This allows us to pick up the scan where we left off. |
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134 | |||
135 | If this is zero, or a null string, it means resume the scan |
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136 | by advancing to the next ARGV-element. */ |
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137 | |||
138 | static char *nextchar; |
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139 | |||
140 | /* Callers store zero here to inhibit the error message |
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141 | for unrecognized options. */ |
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142 | |||
143 | int opterr = 1; |
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144 | |||
145 | /* Set to an option character which was unrecognized. |
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146 | This must be initialized on some systems to avoid linking in the |
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147 | system's own getopt implementation. */ |
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148 | |||
149 | int optopt = '?'; |
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150 | |||
151 | /* Describe how to deal with options that follow non-option ARGV-elements. |
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152 | |||
153 | If the caller did not specify anything, |
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154 | the default is REQUIRE_ORDER if the environment variable |
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155 | POSIXLY_CORRECT is defined, PERMUTE otherwise. |
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156 | |||
157 | REQUIRE_ORDER means don't recognize them as options; |
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158 | stop option processing when the first non-option is seen. |
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159 | This is what Unix does. |
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160 | This mode of operation is selected by either setting the environment |
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161 | variable POSIXLY_CORRECT, or using `+' as the first character |
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162 | of the list of option characters. |
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163 | |||
164 | PERMUTE is the default. We permute the contents of ARGV as we scan, |
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165 | so that eventually all the non-options are at the end. This allows options |
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166 | to be given in any order, even with programs that were not written to |
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167 | expect this. |
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168 | |||
169 | RETURN_IN_ORDER is an option available to programs that were written |
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170 | to expect options and other ARGV-elements in any order and that care about |
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171 | the ordering of the two. We describe each non-option ARGV-element |
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172 | as if it were the argument of an option with character code 1. |
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173 | Using `-' as the first character of the list of option characters |
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174 | selects this mode of operation. |
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175 | |||
176 | The special argument `--' forces an end of option-scanning regardless |
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177 | of the value of `ordering'. In the case of RETURN_IN_ORDER, only |
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178 | `--' can cause `getopt' to return -1 with `optind' != ARGC. */ |
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179 | |||
180 | static enum |
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181 | { |
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182 | REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER |
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183 | } ordering; |
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184 | |||
185 | /* Value of POSIXLY_CORRECT environment variable. */ |
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186 | static char *posixly_correct; |
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187 | |||
188 | #ifdef __GNU_LIBRARY__ |
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189 | /* We want to avoid inclusion of string.h with non-GNU libraries |
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190 | because there are many ways it can cause trouble. |
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191 | On some systems, it contains special magic macros that don't work |
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192 | in GCC. */ |
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193 | # include |
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194 | # define my_index strchr |
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195 | #else |
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196 | |||
197 | # if HAVE_STRING_H |
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198 | # include |
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199 | # else |
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200 | # if HAVE_STRINGS_H |
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201 | # include |
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202 | # endif |
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203 | # endif |
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204 | |||
205 | /* Avoid depending on library functions or files |
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206 | whose names are inconsistent. */ |
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207 | |||
208 | #if HAVE_STDLIB_H && HAVE_DECL_GETENV |
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209 | # include |
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210 | #elif !defined(getenv) |
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211 | # ifdef __cplusplus |
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212 | extern "C" { |
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213 | # endif /* __cplusplus */ |
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214 | extern char *getenv (const char *); |
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215 | # ifdef __cplusplus |
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216 | } |
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217 | # endif /* __cplusplus */ |
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218 | #endif |
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219 | |||
220 | static char * |
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221 | my_index (const char *str, int chr) |
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222 | { |
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223 | while (*str) |
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224 | { |
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225 | if (*str == chr) |
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226 | return (char *) str; |
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227 | str++; |
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228 | } |
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229 | return 0; |
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230 | } |
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231 | |||
232 | /* If using GCC, we can safely declare strlen this way. |
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233 | If not using GCC, it is ok not to declare it. */ |
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234 | #ifdef __GNUC__ |
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235 | /* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h. |
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236 | That was relevant to code that was here before. */ |
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237 | # if (!defined __STDC__ || !__STDC__) && !defined strlen |
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238 | /* gcc with -traditional declares the built-in strlen to return int, |
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239 | and has done so at least since version 2.4.5. -- rms. */ |
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240 | extern int strlen (const char *); |
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241 | # endif /* not __STDC__ */ |
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242 | #endif /* __GNUC__ */ |
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243 | |||
244 | #endif /* not __GNU_LIBRARY__ */ |
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245 | |||
246 | /* Handle permutation of arguments. */ |
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247 | |||
248 | /* Describe the part of ARGV that contains non-options that have |
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249 | been skipped. `first_nonopt' is the index in ARGV of the first of them; |
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250 | `last_nonopt' is the index after the last of them. */ |
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251 | |||
252 | static int first_nonopt; |
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253 | static int last_nonopt; |
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254 | |||
255 | #ifdef _LIBC |
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256 | /* Bash 2.0 gives us an environment variable containing flags |
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257 | indicating ARGV elements that should not be considered arguments. */ |
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258 | |||
259 | /* Defined in getopt_init.c */ |
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260 | extern char *__getopt_nonoption_flags; |
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261 | |||
262 | static int nonoption_flags_max_len; |
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263 | static int nonoption_flags_len; |
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264 | |||
265 | static int original_argc; |
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266 | static char *const *original_argv; |
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267 | |||
268 | /* Make sure the environment variable bash 2.0 puts in the environment |
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269 | is valid for the getopt call we must make sure that the ARGV passed |
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270 | to getopt is that one passed to the process. */ |
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271 | static void |
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272 | __attribute__ ((unused)) |
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273 | store_args_and_env (int argc, char *const *argv) |
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274 | { |
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275 | /* XXX This is no good solution. We should rather copy the args so |
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276 | that we can compare them later. But we must not use malloc(3). */ |
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277 | original_argc = argc; |
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278 | original_argv = argv; |
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279 | } |
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280 | # ifdef text_set_element |
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281 | text_set_element (__libc_subinit, store_args_and_env); |
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282 | # endif /* text_set_element */ |
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283 | |||
284 | # define SWAP_FLAGS(ch1, ch2) \ |
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285 | if (nonoption_flags_len > 0) \ |
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286 | { \ |
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287 | char __tmp = __getopt_nonoption_flags[ch1]; \ |
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288 | __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \ |
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289 | __getopt_nonoption_flags[ch2] = __tmp; \ |
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290 | } |
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291 | #else /* !_LIBC */ |
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292 | # define SWAP_FLAGS(ch1, ch2) |
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293 | #endif /* _LIBC */ |
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294 | |||
295 | /* Exchange two adjacent subsequences of ARGV. |
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296 | One subsequence is elements [first_nonopt,last_nonopt) |
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297 | which contains all the non-options that have been skipped so far. |
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298 | The other is elements [last_nonopt,optind), which contains all |
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299 | the options processed since those non-options were skipped. |
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300 | |||
301 | `first_nonopt' and `last_nonopt' are relocated so that they describe |
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302 | the new indices of the non-options in ARGV after they are moved. */ |
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303 | |||
304 | #if defined __STDC__ && __STDC__ |
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305 | static void exchange (char **); |
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306 | #endif |
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307 | |||
308 | static void |
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309 | exchange (char **argv) |
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310 | { |
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311 | int bottom = first_nonopt; |
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312 | int middle = last_nonopt; |
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313 | int top = optind; |
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314 | char *tem; |
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315 | |||
316 | /* Exchange the shorter segment with the far end of the longer segment. |
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317 | That puts the shorter segment into the right place. |
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318 | It leaves the longer segment in the right place overall, |
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319 | but it consists of two parts that need to be swapped next. */ |
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320 | |||
321 | #ifdef _LIBC |
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322 | /* First make sure the handling of the `__getopt_nonoption_flags' |
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323 | string can work normally. Our top argument must be in the range |
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324 | of the string. */ |
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325 | if (nonoption_flags_len > 0 && top >= nonoption_flags_max_len) |
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326 | { |
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327 | /* We must extend the array. The user plays games with us and |
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328 | presents new arguments. */ |
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329 | char *new_str = (char *) malloc (top + 1); |
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330 | if (new_str == NULL) |
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331 | nonoption_flags_len = nonoption_flags_max_len = 0; |
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332 | else |
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333 | { |
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334 | memset (mempcpy (new_str, __getopt_nonoption_flags, |
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335 | nonoption_flags_max_len), |
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336 | '\0', top + 1 - nonoption_flags_max_len); |
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337 | nonoption_flags_max_len = top + 1; |
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338 | __getopt_nonoption_flags = new_str; |
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339 | } |
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340 | } |
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341 | #endif |
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342 | |||
343 | while (top > middle && middle > bottom) |
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344 | { |
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345 | if (top - middle > middle - bottom) |
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346 | { |
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347 | /* Bottom segment is the short one. */ |
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348 | int len = middle - bottom; |
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349 | register int i; |
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350 | |||
351 | /* Swap it with the top part of the top segment. */ |
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352 | for (i = 0; i < len; i++) |
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353 | { |
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354 | tem = argv[bottom + i]; |
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355 | argv[bottom + i] = argv[top - (middle - bottom) + i]; |
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356 | argv[top - (middle - bottom) + i] = tem; |
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357 | SWAP_FLAGS (bottom + i, top - (middle - bottom) + i); |
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358 | } |
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359 | /* Exclude the moved bottom segment from further swapping. */ |
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360 | top -= len; |
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361 | } |
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362 | else |
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363 | { |
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364 | /* Top segment is the short one. */ |
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365 | int len = top - middle; |
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366 | register int i; |
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367 | |||
368 | /* Swap it with the bottom part of the bottom segment. */ |
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369 | for (i = 0; i < len; i++) |
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370 | { |
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371 | tem = argv[bottom + i]; |
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372 | argv[bottom + i] = argv[middle + i]; |
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373 | argv[middle + i] = tem; |
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374 | SWAP_FLAGS (bottom + i, middle + i); |
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375 | } |
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376 | /* Exclude the moved top segment from further swapping. */ |
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377 | bottom += len; |
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378 | } |
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379 | } |
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380 | |||
381 | /* Update records for the slots the non-options now occupy. */ |
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382 | |||
383 | first_nonopt += (optind - last_nonopt); |
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384 | last_nonopt = optind; |
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385 | } |
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386 | |||
387 | /* Initialize the internal data when the first call is made. */ |
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388 | |||
389 | #if defined __STDC__ && __STDC__ |
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390 | static const char *_getopt_initialize (int, char *const *, const char *); |
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391 | #endif |
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392 | static const char * |
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393 | _getopt_initialize (int argc ATTRIBUTE_UNUSED, |
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394 | char *const *argv ATTRIBUTE_UNUSED, |
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395 | const char *optstring) |
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396 | { |
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397 | /* Start processing options with ARGV-element 1 (since ARGV-element 0 |
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398 | is the program name); the sequence of previously skipped |
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399 | non-option ARGV-elements is empty. */ |
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400 | |||
401 | first_nonopt = last_nonopt = optind; |
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402 | |||
403 | nextchar = NULL; |
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404 | |||
405 | posixly_correct = getenv ("POSIXLY_CORRECT"); |
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406 | |||
407 | /* Determine how to handle the ordering of options and nonoptions. */ |
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408 | |||
409 | if (optstring[0] == '-') |
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410 | { |
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411 | ordering = RETURN_IN_ORDER; |
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412 | ++optstring; |
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413 | } |
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414 | else if (optstring[0] == '+') |
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415 | { |
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416 | ordering = REQUIRE_ORDER; |
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417 | ++optstring; |
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418 | } |
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419 | else if (posixly_correct != NULL) |
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420 | ordering = REQUIRE_ORDER; |
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421 | else |
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422 | ordering = PERMUTE; |
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423 | |||
424 | #ifdef _LIBC |
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425 | if (posixly_correct == NULL |
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426 | && argc == original_argc && argv == original_argv) |
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427 | { |
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428 | if (nonoption_flags_max_len == 0) |
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429 | { |
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430 | if (__getopt_nonoption_flags == NULL |
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431 | || __getopt_nonoption_flags[0] == '\0') |
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432 | nonoption_flags_max_len = -1; |
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433 | else |
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434 | { |
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435 | const char *orig_str = __getopt_nonoption_flags; |
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436 | int len = nonoption_flags_max_len = strlen (orig_str); |
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437 | if (nonoption_flags_max_len < argc) |
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438 | nonoption_flags_max_len = argc; |
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439 | __getopt_nonoption_flags = |
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440 | (char *) malloc (nonoption_flags_max_len); |
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441 | if (__getopt_nonoption_flags == NULL) |
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442 | nonoption_flags_max_len = -1; |
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443 | else |
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444 | memset (mempcpy (__getopt_nonoption_flags, orig_str, len), |
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445 | '\0', nonoption_flags_max_len - len); |
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446 | } |
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447 | } |
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448 | nonoption_flags_len = nonoption_flags_max_len; |
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449 | } |
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450 | else |
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451 | nonoption_flags_len = 0; |
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452 | #endif |
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453 | |||
454 | return optstring; |
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455 | } |
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456 | |||
457 | /* Scan elements of ARGV (whose length is ARGC) for option characters |
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458 | given in OPTSTRING. |
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459 | |||
460 | If an element of ARGV starts with '-', and is not exactly "-" or "--", |
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461 | then it is an option element. The characters of this element |
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462 | (aside from the initial '-') are option characters. If `getopt' |
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463 | is called repeatedly, it returns successively each of the option characters |
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464 | from each of the option elements. |
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465 | |||
466 | If `getopt' finds another option character, it returns that character, |
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467 | updating `optind' and `nextchar' so that the next call to `getopt' can |
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468 | resume the scan with the following option character or ARGV-element. |
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469 | |||
470 | If there are no more option characters, `getopt' returns -1. |
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471 | Then `optind' is the index in ARGV of the first ARGV-element |
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472 | that is not an option. (The ARGV-elements have been permuted |
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473 | so that those that are not options now come last.) |
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474 | |||
475 | OPTSTRING is a string containing the legitimate option characters. |
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476 | If an option character is seen that is not listed in OPTSTRING, |
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477 | return '?' after printing an error message. If you set `opterr' to |
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478 | zero, the error message is suppressed but we still return '?'. |
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479 | |||
480 | If a char in OPTSTRING is followed by a colon, that means it wants an arg, |
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481 | so the following text in the same ARGV-element, or the text of the following |
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482 | ARGV-element, is returned in `optarg'. Two colons mean an option that |
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483 | wants an optional arg; if there is text in the current ARGV-element, |
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484 | it is returned in `optarg', otherwise `optarg' is set to zero. |
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485 | |||
486 | If OPTSTRING starts with `-' or `+', it requests different methods of |
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487 | handling the non-option ARGV-elements. |
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488 | See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above. |
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489 | |||
490 | Long-named options begin with `--' instead of `-'. |
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491 | Their names may be abbreviated as long as the abbreviation is unique |
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492 | or is an exact match for some defined option. If they have an |
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493 | argument, it follows the option name in the same ARGV-element, separated |
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494 | from the option name by a `=', or else the in next ARGV-element. |
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495 | When `getopt' finds a long-named option, it returns 0 if that option's |
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496 | `flag' field is nonzero, the value of the option's `val' field |
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497 | if the `flag' field is zero. |
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498 | |||
499 | The elements of ARGV aren't really const, because we permute them. |
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500 | But we pretend they're const in the prototype to be compatible |
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501 | with other systems. |
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502 | |||
503 | LONGOPTS is a vector of `struct option' terminated by an |
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504 | element containing a name which is zero. |
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505 | |||
506 | LONGIND returns the index in LONGOPT of the long-named option found. |
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507 | It is only valid when a long-named option has been found by the most |
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508 | recent call. |
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509 | |||
510 | If LONG_ONLY is nonzero, '-' as well as '--' can introduce |
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511 | long-named options. */ |
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512 | |||
513 | int |
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514 | _getopt_internal (int argc, char *const *argv, const char *optstring, |
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515 | const struct option *longopts, |
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516 | int *longind, int long_only) |
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517 | { |
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518 | optarg = NULL; |
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519 | |||
520 | if (optind == 0 || !__getopt_initialized) |
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521 | { |
||
522 | if (optind == 0) |
||
523 | optind = 1; /* Don't scan ARGV[0], the program name. */ |
||
524 | optstring = _getopt_initialize (argc, argv, optstring); |
||
525 | __getopt_initialized = 1; |
||
526 | } |
||
527 | |||
528 | /* Test whether ARGV[optind] points to a non-option argument. |
||
529 | Either it does not have option syntax, or there is an environment flag |
||
530 | from the shell indicating it is not an option. The later information |
||
531 | is only used when the used in the GNU libc. */ |
||
532 | #ifdef _LIBC |
||
533 | # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0' \ |
||
534 | || (optind < nonoption_flags_len \ |
||
535 | && __getopt_nonoption_flags[optind] == '1')) |
||
536 | #else |
||
537 | # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0') |
||
538 | #endif |
||
539 | |||
540 | if (nextchar == NULL || *nextchar == '\0') |
||
541 | { |
||
542 | /* Advance to the next ARGV-element. */ |
||
543 | |||
544 | /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been |
||
545 | moved back by the user (who may also have changed the arguments). */ |
||
546 | if (last_nonopt > optind) |
||
547 | last_nonopt = optind; |
||
548 | if (first_nonopt > optind) |
||
549 | first_nonopt = optind; |
||
550 | |||
551 | if (ordering == PERMUTE) |
||
552 | { |
||
553 | /* If we have just processed some options following some non-options, |
||
554 | exchange them so that the options come first. */ |
||
555 | |||
556 | if (first_nonopt != last_nonopt && last_nonopt != optind) |
||
557 | exchange ((char **) argv); |
||
558 | else if (last_nonopt != optind) |
||
559 | first_nonopt = optind; |
||
560 | |||
561 | /* Skip any additional non-options |
||
562 | and extend the range of non-options previously skipped. */ |
||
563 | |||
564 | while (optind < argc && NONOPTION_P) |
||
565 | optind++; |
||
566 | last_nonopt = optind; |
||
567 | } |
||
568 | |||
569 | /* The special ARGV-element `--' means premature end of options. |
||
570 | Skip it like a null option, |
||
571 | then exchange with previous non-options as if it were an option, |
||
572 | then skip everything else like a non-option. */ |
||
573 | |||
574 | if (optind != argc && !strcmp (argv[optind], "--")) |
||
575 | { |
||
576 | optind++; |
||
577 | |||
578 | if (first_nonopt != last_nonopt && last_nonopt != optind) |
||
579 | exchange ((char **) argv); |
||
580 | else if (first_nonopt == last_nonopt) |
||
581 | first_nonopt = optind; |
||
582 | last_nonopt = argc; |
||
583 | |||
584 | optind = argc; |
||
585 | } |
||
586 | |||
587 | /* If we have done all the ARGV-elements, stop the scan |
||
588 | and back over any non-options that we skipped and permuted. */ |
||
589 | |||
590 | if (optind == argc) |
||
591 | { |
||
592 | /* Set the next-arg-index to point at the non-options |
||
593 | that we previously skipped, so the caller will digest them. */ |
||
594 | if (first_nonopt != last_nonopt) |
||
595 | optind = first_nonopt; |
||
596 | return -1; |
||
597 | } |
||
598 | |||
599 | /* If we have come to a non-option and did not permute it, |
||
600 | either stop the scan or describe it to the caller and pass it by. */ |
||
601 | |||
602 | if (NONOPTION_P) |
||
603 | { |
||
604 | if (ordering == REQUIRE_ORDER) |
||
605 | return -1; |
||
606 | optarg = argv[optind++]; |
||
607 | return 1; |
||
608 | } |
||
609 | |||
610 | /* We have found another option-ARGV-element. |
||
611 | Skip the initial punctuation. */ |
||
612 | |||
613 | nextchar = (argv[optind] + 1 |
||
614 | + (longopts != NULL && argv[optind][1] == '-')); |
||
615 | } |
||
616 | |||
617 | /* Decode the current option-ARGV-element. */ |
||
618 | |||
619 | /* Check whether the ARGV-element is a long option. |
||
620 | |||
621 | If long_only and the ARGV-element has the form "-f", where f is |
||
622 | a valid short option, don't consider it an abbreviated form of |
||
623 | a long option that starts with f. Otherwise there would be no |
||
624 | way to give the -f short option. |
||
625 | |||
626 | On the other hand, if there's a long option "fubar" and |
||
627 | the ARGV-element is "-fu", do consider that an abbreviation of |
||
628 | the long option, just like "--fu", and not "-f" with arg "u". |
||
629 | |||
630 | This distinction seems to be the most useful approach. */ |
||
631 | |||
632 | if (longopts != NULL |
||
633 | && (argv[optind][1] == '-' |
||
634 | || (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1]))))) |
||
635 | { |
||
636 | char *nameend; |
||
637 | const struct option *p; |
||
638 | const struct option *pfound = NULL; |
||
639 | int exact = 0; |
||
640 | int ambig = 0; |
||
641 | int indfound = -1; |
||
642 | int option_index; |
||
643 | |||
644 | for (nameend = nextchar; *nameend && *nameend != '='; nameend++) |
||
645 | /* Do nothing. */ ; |
||
646 | |||
647 | /* Test all long options for either exact match |
||
648 | or abbreviated matches. */ |
||
649 | for (p = longopts, option_index = 0; p->name; p++, option_index++) |
||
650 | if (!strncmp (p->name, nextchar, nameend - nextchar)) |
||
651 | { |
||
652 | if ((unsigned int) (nameend - nextchar) |
||
653 | == (unsigned int) strlen (p->name)) |
||
654 | { |
||
655 | /* Exact match found. */ |
||
656 | pfound = p; |
||
657 | indfound = option_index; |
||
658 | exact = 1; |
||
659 | break; |
||
660 | } |
||
661 | else if (pfound == NULL) |
||
662 | { |
||
663 | /* First nonexact match found. */ |
||
664 | pfound = p; |
||
665 | indfound = option_index; |
||
666 | } |
||
667 | else |
||
668 | /* Second or later nonexact match found. */ |
||
669 | ambig = 1; |
||
670 | } |
||
671 | |||
672 | if (ambig && !exact) |
||
673 | { |
||
674 | if (opterr) |
||
675 | fprintf (stderr, _("%s: option `%s' is ambiguous\n"), |
||
676 | argv[0], argv[optind]); |
||
677 | nextchar += strlen (nextchar); |
||
678 | optind++; |
||
679 | optopt = 0; |
||
680 | return '?'; |
||
681 | } |
||
682 | |||
683 | if (pfound != NULL) |
||
684 | { |
||
685 | option_index = indfound; |
||
686 | optind++; |
||
687 | if (*nameend) |
||
688 | { |
||
689 | /* Don't test has_arg with >, because some C compilers don't |
||
690 | allow it to be used on enums. */ |
||
691 | if (pfound->has_arg) |
||
692 | optarg = nameend + 1; |
||
693 | else |
||
694 | { |
||
695 | if (opterr) |
||
696 | { |
||
697 | if (argv[optind - 1][1] == '-') |
||
698 | /* --option */ |
||
699 | fprintf (stderr, |
||
700 | _("%s: option `--%s' doesn't allow an argument\n"), |
||
701 | argv[0], pfound->name); |
||
702 | else |
||
703 | /* +option or -option */ |
||
704 | fprintf (stderr, |
||
705 | _("%s: option `%c%s' doesn't allow an argument\n"), |
||
706 | argv[0], argv[optind - 1][0], pfound->name); |
||
707 | |||
708 | nextchar += strlen (nextchar); |
||
709 | |||
710 | optopt = pfound->val; |
||
711 | return '?'; |
||
712 | } |
||
713 | } |
||
714 | } |
||
715 | else if (pfound->has_arg == 1) |
||
716 | { |
||
717 | if (optind < argc) |
||
718 | optarg = argv[optind++]; |
||
719 | else |
||
720 | { |
||
721 | if (opterr) |
||
722 | fprintf (stderr, |
||
723 | _("%s: option `%s' requires an argument\n"), |
||
724 | argv[0], argv[optind - 1]); |
||
725 | nextchar += strlen (nextchar); |
||
726 | optopt = pfound->val; |
||
727 | return optstring[0] == ':' ? ':' : '?'; |
||
728 | } |
||
729 | } |
||
730 | nextchar += strlen (nextchar); |
||
731 | if (longind != NULL) |
||
732 | *longind = option_index; |
||
733 | if (pfound->flag) |
||
734 | { |
||
735 | *(pfound->flag) = pfound->val; |
||
736 | return 0; |
||
737 | } |
||
738 | return pfound->val; |
||
739 | } |
||
740 | |||
741 | /* Can't find it as a long option. If this is not getopt_long_only, |
||
742 | or the option starts with '--' or is not a valid short |
||
743 | option, then it's an error. |
||
744 | Otherwise interpret it as a short option. */ |
||
745 | if (!long_only || argv[optind][1] == '-' |
||
746 | || my_index (optstring, *nextchar) == NULL) |
||
747 | { |
||
748 | if (opterr) |
||
749 | { |
||
750 | if (argv[optind][1] == '-') |
||
751 | /* --option */ |
||
752 | fprintf (stderr, _("%s: unrecognized option `--%s'\n"), |
||
753 | argv[0], nextchar); |
||
754 | else |
||
755 | /* +option or -option */ |
||
756 | fprintf (stderr, _("%s: unrecognized option `%c%s'\n"), |
||
757 | argv[0], argv[optind][0], nextchar); |
||
758 | } |
||
759 | nextchar = (char *) ""; |
||
760 | optind++; |
||
761 | optopt = 0; |
||
762 | return '?'; |
||
763 | } |
||
764 | } |
||
765 | |||
766 | /* Look at and handle the next short option-character. */ |
||
767 | |||
768 | { |
||
769 | char c = *nextchar++; |
||
770 | char *temp = my_index (optstring, c); |
||
771 | |||
772 | /* Increment `optind' when we start to process its last character. */ |
||
773 | if (*nextchar == '\0') |
||
774 | ++optind; |
||
775 | |||
776 | if (temp == NULL || c == ':') |
||
777 | { |
||
778 | if (opterr) |
||
779 | { |
||
780 | if (posixly_correct) |
||
781 | /* 1003.2 specifies the format of this message. */ |
||
782 | fprintf (stderr, _("%s: illegal option -- %c\n"), |
||
783 | argv[0], c); |
||
784 | else |
||
785 | fprintf (stderr, _("%s: invalid option -- %c\n"), |
||
786 | argv[0], c); |
||
787 | } |
||
788 | optopt = c; |
||
789 | return '?'; |
||
790 | } |
||
791 | /* Convenience. Treat POSIX -W foo same as long option --foo */ |
||
792 | if (temp[0] == 'W' && temp[1] == ';') |
||
793 | { |
||
794 | char *nameend; |
||
795 | const struct option *p; |
||
796 | const struct option *pfound = NULL; |
||
797 | int exact = 0; |
||
798 | int ambig = 0; |
||
799 | int indfound = 0; |
||
800 | int option_index; |
||
801 | |||
802 | /* This is an option that requires an argument. */ |
||
803 | if (*nextchar != '\0') |
||
804 | { |
||
805 | optarg = nextchar; |
||
806 | /* If we end this ARGV-element by taking the rest as an arg, |
||
807 | we must advance to the next element now. */ |
||
808 | optind++; |
||
809 | } |
||
810 | else if (optind == argc) |
||
811 | { |
||
812 | if (opterr) |
||
813 | { |
||
814 | /* 1003.2 specifies the format of this message. */ |
||
815 | fprintf (stderr, _("%s: option requires an argument -- %c\n"), |
||
816 | argv[0], c); |
||
817 | } |
||
818 | optopt = c; |
||
819 | if (optstring[0] == ':') |
||
820 | c = ':'; |
||
821 | else |
||
822 | c = '?'; |
||
823 | return c; |
||
824 | } |
||
825 | else |
||
826 | /* We already incremented `optind' once; |
||
827 | increment it again when taking next ARGV-elt as argument. */ |
||
828 | optarg = argv[optind++]; |
||
829 | |||
830 | /* optarg is now the argument, see if it's in the |
||
831 | table of longopts. */ |
||
832 | |||
833 | for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++) |
||
834 | /* Do nothing. */ ; |
||
835 | |||
836 | /* Test all long options for either exact match |
||
837 | or abbreviated matches. */ |
||
838 | for (p = longopts, option_index = 0; p->name; p++, option_index++) |
||
839 | if (!strncmp (p->name, nextchar, nameend - nextchar)) |
||
840 | { |
||
841 | if ((unsigned int) (nameend - nextchar) == strlen (p->name)) |
||
842 | { |
||
843 | /* Exact match found. */ |
||
844 | pfound = p; |
||
845 | indfound = option_index; |
||
846 | exact = 1; |
||
847 | break; |
||
848 | } |
||
849 | else if (pfound == NULL) |
||
850 | { |
||
851 | /* First nonexact match found. */ |
||
852 | pfound = p; |
||
853 | indfound = option_index; |
||
854 | } |
||
855 | else |
||
856 | /* Second or later nonexact match found. */ |
||
857 | ambig = 1; |
||
858 | } |
||
859 | if (ambig && !exact) |
||
860 | { |
||
861 | if (opterr) |
||
862 | fprintf (stderr, _("%s: option `-W %s' is ambiguous\n"), |
||
863 | argv[0], argv[optind]); |
||
864 | nextchar += strlen (nextchar); |
||
865 | optind++; |
||
866 | return '?'; |
||
867 | } |
||
868 | if (pfound != NULL) |
||
869 | { |
||
870 | option_index = indfound; |
||
871 | if (*nameend) |
||
872 | { |
||
873 | /* Don't test has_arg with >, because some C compilers don't |
||
874 | allow it to be used on enums. */ |
||
875 | if (pfound->has_arg) |
||
876 | optarg = nameend + 1; |
||
877 | else |
||
878 | { |
||
879 | if (opterr) |
||
880 | fprintf (stderr, _("\ |
||
881 | %s: option `-W %s' doesn't allow an argument\n"), |
||
882 | argv[0], pfound->name); |
||
883 | |||
884 | nextchar += strlen (nextchar); |
||
885 | return '?'; |
||
886 | } |
||
887 | } |
||
888 | else if (pfound->has_arg == 1) |
||
889 | { |
||
890 | if (optind < argc) |
||
891 | optarg = argv[optind++]; |
||
892 | else |
||
893 | { |
||
894 | if (opterr) |
||
895 | fprintf (stderr, |
||
896 | _("%s: option `%s' requires an argument\n"), |
||
897 | argv[0], argv[optind - 1]); |
||
898 | nextchar += strlen (nextchar); |
||
899 | return optstring[0] == ':' ? ':' : '?'; |
||
900 | } |
||
901 | } |
||
902 | nextchar += strlen (nextchar); |
||
903 | if (longind != NULL) |
||
904 | *longind = option_index; |
||
905 | if (pfound->flag) |
||
906 | { |
||
907 | *(pfound->flag) = pfound->val; |
||
908 | return 0; |
||
909 | } |
||
910 | return pfound->val; |
||
911 | } |
||
912 | nextchar = NULL; |
||
913 | return 'W'; /* Let the application handle it. */ |
||
914 | } |
||
915 | if (temp[1] == ':') |
||
916 | { |
||
917 | if (temp[2] == ':') |
||
918 | { |
||
919 | /* This is an option that accepts an argument optionally. */ |
||
920 | if (*nextchar != '\0') |
||
921 | { |
||
922 | optarg = nextchar; |
||
923 | optind++; |
||
924 | } |
||
925 | else |
||
926 | optarg = NULL; |
||
927 | nextchar = NULL; |
||
928 | } |
||
929 | else |
||
930 | { |
||
931 | /* This is an option that requires an argument. */ |
||
932 | if (*nextchar != '\0') |
||
933 | { |
||
934 | optarg = nextchar; |
||
935 | /* If we end this ARGV-element by taking the rest as an arg, |
||
936 | we must advance to the next element now. */ |
||
937 | optind++; |
||
938 | } |
||
939 | else if (optind == argc) |
||
940 | { |
||
941 | if (opterr) |
||
942 | { |
||
943 | /* 1003.2 specifies the format of this message. */ |
||
944 | fprintf (stderr, |
||
945 | _("%s: option requires an argument -- %c\n"), |
||
946 | argv[0], c); |
||
947 | } |
||
948 | optopt = c; |
||
949 | if (optstring[0] == ':') |
||
950 | c = ':'; |
||
951 | else |
||
952 | c = '?'; |
||
953 | } |
||
954 | else |
||
955 | /* We already incremented `optind' once; |
||
956 | increment it again when taking next ARGV-elt as argument. */ |
||
957 | optarg = argv[optind++]; |
||
958 | nextchar = NULL; |
||
959 | } |
||
960 | } |
||
961 | return c; |
||
962 | } |
||
963 | } |
||
964 | |||
965 | int |
||
966 | getopt (int argc, char *const *argv, const char *optstring) |
||
967 | { |
||
968 | return _getopt_internal (argc, argv, optstring, |
||
969 | (const struct option *) 0, |
||
970 | (int *) 0, |
||
971 | 0); |
||
972 | } |
||
973 | |||
974 | #endif /* Not ELIDE_CODE. */ |
||
975 | |||
976 | #ifdef TEST |
||
977 | |||
978 | /* Compile with -DTEST to make an executable for use in testing |
||
979 | the above definition of `getopt'. */ |
||
980 | |||
981 | int |
||
982 | main (int argc, 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 */>>>>>>>>> |