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6132 | 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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6660 | serge | 46 | #define NULL (void*)0 |
6132 | serge | 47 | |
6660 | serge | 48 | //#include |
49 | |||
6132 | serge | 50 | /* Comment out all this code if we are using the GNU C Library, and are not |
51 | actually compiling the library itself. This code is part of the GNU C |
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52 | Library, but also included in many other GNU distributions. Compiling |
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53 | and linking in this code is a waste when using the GNU C library |
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54 | (especially if it is a shared library). Rather than having every GNU |
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55 | program understand `configure --with-gnu-libc' and omit the object files, |
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56 | it is simpler to just do this in the source for each such file. */ |
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57 | |||
58 | #define GETOPT_INTERFACE_VERSION 2 |
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59 | #if !defined _LIBC && defined __GLIBC__ && __GLIBC__ >= 2 |
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60 | # include |
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61 | # if _GNU_GETOPT_INTERFACE_VERSION == GETOPT_INTERFACE_VERSION |
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62 | # define ELIDE_CODE |
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63 | # endif |
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64 | #endif |
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65 | |||
66 | #ifndef ELIDE_CODE |
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67 | |||
68 | |||
69 | /* This needs to come after some library #include |
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70 | to get __GNU_LIBRARY__ defined. */ |
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71 | #ifdef __GNU_LIBRARY__ |
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72 | /* Don't include stdlib.h for non-GNU C libraries because some of them |
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73 | contain conflicting prototypes for getopt. */ |
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74 | # include |
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75 | # include |
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76 | #endif /* GNU C library. */ |
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77 | |||
78 | #ifdef VMS |
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79 | # include |
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80 | # if HAVE_STRING_H - 0 |
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81 | # include |
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82 | # endif |
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83 | #endif |
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84 | |||
85 | #define strlen __builtin_strlen |
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86 | |||
87 | # define _(msgid) (msgid) |
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88 | |||
89 | /* This version of `getopt' appears to the caller like standard Unix `getopt' |
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90 | but it behaves differently for the user, since it allows the user |
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91 | to intersperse the options with the other arguments. |
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92 | |||
93 | As `getopt' works, it permutes the elements of ARGV so that, |
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94 | when it is done, all the options precede everything else. Thus |
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95 | all application programs are extended to handle flexible argument order. |
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96 | |||
97 | Setting the environment variable POSIXLY_CORRECT disables permutation. |
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98 | Then the behavior is completely standard. |
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99 | |||
100 | GNU application programs can use a third alternative mode in which |
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101 | they can distinguish the relative order of options and other arguments. */ |
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102 | |||
103 | #include "getopt.h" |
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104 | |||
105 | /* For communication from `getopt' to the caller. |
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106 | When `getopt' finds an option that takes an argument, |
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107 | the argument value is returned here. |
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108 | Also, when `ordering' is RETURN_IN_ORDER, |
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109 | each non-option ARGV-element is returned here. */ |
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110 | |||
111 | char *optarg = NULL; |
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112 | |||
113 | /* Index in ARGV of the next element to be scanned. |
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114 | This is used for communication to and from the caller |
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115 | and for communication between successive calls to `getopt'. |
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116 | |||
117 | On entry to `getopt', zero means this is the first call; initialize. |
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118 | |||
119 | When `getopt' returns -1, this is the index of the first of the |
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120 | non-option elements that the caller should itself scan. |
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121 | |||
122 | Otherwise, `optind' communicates from one call to the next |
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123 | how much of ARGV has been scanned so far. */ |
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124 | |||
125 | /* 1003.2 says this must be 1 before any call. */ |
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126 | int optind = 1; |
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127 | |||
128 | /* Formerly, initialization of getopt depended on optind==0, which |
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129 | causes problems with re-calling getopt as programs generally don't |
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130 | know that. */ |
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131 | |||
132 | int __getopt_initialized = 0; |
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133 | |||
134 | /* The next char to be scanned in the option-element |
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135 | in which the last option character we returned was found. |
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136 | This allows us to pick up the scan where we left off. |
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137 | |||
138 | If this is zero, or a null string, it means resume the scan |
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139 | by advancing to the next ARGV-element. */ |
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140 | |||
141 | static char *nextchar; |
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142 | |||
143 | /* Callers store zero here to inhibit the error message |
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144 | for unrecognized options. */ |
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145 | |||
146 | int opterr = 1; |
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147 | |||
148 | /* Set to an option character which was unrecognized. |
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149 | This must be initialized on some systems to avoid linking in the |
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150 | system's own getopt implementation. */ |
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151 | |||
152 | int optopt = '?'; |
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153 | |||
154 | /* Describe how to deal with options that follow non-option ARGV-elements. |
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155 | |||
156 | If the caller did not specify anything, |
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157 | the default is REQUIRE_ORDER if the environment variable |
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158 | POSIXLY_CORRECT is defined, PERMUTE otherwise. |
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159 | |||
160 | REQUIRE_ORDER means don't recognize them as options; |
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161 | stop option processing when the first non-option is seen. |
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162 | This is what Unix does. |
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163 | This mode of operation is selected by either setting the environment |
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164 | variable POSIXLY_CORRECT, or using `+' as the first character |
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165 | of the list of option characters. |
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166 | |||
167 | PERMUTE is the default. We permute the contents of ARGV as we scan, |
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168 | so that eventually all the non-options are at the end. This allows options |
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169 | to be given in any order, even with programs that were not written to |
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170 | expect this. |
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171 | |||
172 | RETURN_IN_ORDER is an option available to programs that were written |
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173 | to expect options and other ARGV-elements in any order and that care about |
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174 | the ordering of the two. We describe each non-option ARGV-element |
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175 | as if it were the argument of an option with character code 1. |
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176 | Using `-' as the first character of the list of option characters |
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177 | selects this mode of operation. |
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178 | |||
179 | The special argument `--' forces an end of option-scanning regardless |
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180 | of the value of `ordering'. In the case of RETURN_IN_ORDER, only |
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181 | `--' can cause `getopt' to return -1 with `optind' != ARGC. */ |
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182 | |||
183 | static enum |
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184 | { |
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185 | REQUIRE_ORDER, PERMUTE, RETURN_IN_ORDER |
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186 | } ordering; |
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187 | |||
188 | /* Value of POSIXLY_CORRECT environment variable. */ |
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189 | static char *posixly_correct; |
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190 | |||
191 | #ifdef __GNU_LIBRARY__ |
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192 | /* We want to avoid inclusion of string.h with non-GNU libraries |
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193 | because there are many ways it can cause trouble. |
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194 | On some systems, it contains special magic macros that don't work |
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195 | in GCC. */ |
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196 | # include |
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197 | # define my_index strchr |
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198 | #else |
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199 | |||
200 | # if HAVE_STRING_H |
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201 | # include |
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202 | # else |
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203 | # if HAVE_STRINGS_H |
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204 | # include |
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205 | # endif |
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206 | # endif |
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207 | |||
208 | /* Avoid depending on library functions or files |
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209 | whose names are inconsistent. */ |
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210 | |||
211 | #if HAVE_STDLIB_H && HAVE_DECL_GETENV |
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212 | # include |
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213 | #elif !defined(getenv) |
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214 | # ifdef __cplusplus |
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215 | extern "C" { |
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216 | # endif /* __cplusplus */ |
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217 | extern char *getenv (const char *); |
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218 | # ifdef __cplusplus |
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219 | } |
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220 | # endif /* __cplusplus */ |
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221 | #endif |
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222 | |||
223 | static char * |
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224 | my_index (const char *str, int chr) |
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225 | { |
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226 | while (*str) |
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227 | { |
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228 | if (*str == chr) |
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229 | return (char *) str; |
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230 | str++; |
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231 | } |
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232 | return 0; |
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233 | } |
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234 | |||
235 | /* If using GCC, we can safely declare strlen this way. |
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236 | If not using GCC, it is ok not to declare it. */ |
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237 | #ifdef __GNUC__ |
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238 | /* Note that Motorola Delta 68k R3V7 comes with GCC but not stddef.h. |
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239 | That was relevant to code that was here before. */ |
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240 | # if (!defined __STDC__ || !__STDC__) && !defined strlen |
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241 | /* gcc with -traditional declares the built-in strlen to return int, |
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242 | and has done so at least since version 2.4.5. -- rms. */ |
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243 | extern int strlen (const char *); |
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244 | # endif /* not __STDC__ */ |
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245 | #endif /* __GNUC__ */ |
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246 | |||
247 | #endif /* not __GNU_LIBRARY__ */ |
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248 | |||
249 | /* Handle permutation of arguments. */ |
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250 | |||
251 | /* Describe the part of ARGV that contains non-options that have |
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252 | been skipped. `first_nonopt' is the index in ARGV of the first of them; |
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253 | `last_nonopt' is the index after the last of them. */ |
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254 | |||
255 | static int first_nonopt; |
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256 | static int last_nonopt; |
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257 | |||
258 | #ifdef _LIBC |
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259 | /* Bash 2.0 gives us an environment variable containing flags |
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260 | indicating ARGV elements that should not be considered arguments. */ |
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261 | |||
262 | /* Defined in getopt_init.c */ |
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263 | extern char *__getopt_nonoption_flags; |
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264 | |||
265 | static int nonoption_flags_max_len; |
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266 | static int nonoption_flags_len; |
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267 | |||
268 | static int original_argc; |
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269 | static char *const *original_argv; |
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270 | |||
271 | /* Make sure the environment variable bash 2.0 puts in the environment |
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272 | is valid for the getopt call we must make sure that the ARGV passed |
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273 | to getopt is that one passed to the process. */ |
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274 | static void |
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275 | __attribute__ ((unused)) |
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276 | store_args_and_env (int argc, char *const *argv) |
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277 | { |
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278 | /* XXX This is no good solution. We should rather copy the args so |
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279 | that we can compare them later. But we must not use malloc(3). */ |
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280 | original_argc = argc; |
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281 | original_argv = argv; |
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282 | } |
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283 | # ifdef text_set_element |
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284 | text_set_element (__libc_subinit, store_args_and_env); |
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285 | # endif /* text_set_element */ |
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286 | |||
287 | # define SWAP_FLAGS(ch1, ch2) \ |
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288 | if (nonoption_flags_len > 0) \ |
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289 | { \ |
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290 | char __tmp = __getopt_nonoption_flags[ch1]; \ |
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291 | __getopt_nonoption_flags[ch1] = __getopt_nonoption_flags[ch2]; \ |
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292 | __getopt_nonoption_flags[ch2] = __tmp; \ |
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293 | } |
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294 | #else /* !_LIBC */ |
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295 | # define SWAP_FLAGS(ch1, ch2) |
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296 | #endif /* _LIBC */ |
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297 | |||
298 | /* Exchange two adjacent subsequences of ARGV. |
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299 | One subsequence is elements [first_nonopt,last_nonopt) |
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300 | which contains all the non-options that have been skipped so far. |
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301 | The other is elements [last_nonopt,optind), which contains all |
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302 | the options processed since those non-options were skipped. |
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303 | |||
304 | `first_nonopt' and `last_nonopt' are relocated so that they describe |
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305 | the new indices of the non-options in ARGV after they are moved. */ |
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306 | |||
307 | #if defined __STDC__ && __STDC__ |
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308 | static void exchange (char **); |
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309 | #endif |
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310 | |||
311 | static void |
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312 | exchange (char **argv) |
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313 | { |
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314 | int bottom = first_nonopt; |
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315 | int middle = last_nonopt; |
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316 | int top = optind; |
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317 | char *tem; |
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318 | |||
319 | /* Exchange the shorter segment with the far end of the longer segment. |
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320 | That puts the shorter segment into the right place. |
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321 | It leaves the longer segment in the right place overall, |
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322 | but it consists of two parts that need to be swapped next. */ |
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323 | |||
324 | #ifdef _LIBC |
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325 | /* First make sure the handling of the `__getopt_nonoption_flags' |
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326 | string can work normally. Our top argument must be in the range |
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327 | of the string. */ |
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328 | if (nonoption_flags_len > 0 && top >= nonoption_flags_max_len) |
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329 | { |
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330 | /* We must extend the array. The user plays games with us and |
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331 | presents new arguments. */ |
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332 | char *new_str = (char *) malloc (top + 1); |
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333 | if (new_str == NULL) |
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334 | nonoption_flags_len = nonoption_flags_max_len = 0; |
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335 | else |
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336 | { |
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337 | memset (mempcpy (new_str, __getopt_nonoption_flags, |
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338 | nonoption_flags_max_len), |
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339 | '\0', top + 1 - nonoption_flags_max_len); |
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340 | nonoption_flags_max_len = top + 1; |
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341 | __getopt_nonoption_flags = new_str; |
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342 | } |
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343 | } |
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344 | #endif |
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345 | |||
346 | while (top > middle && middle > bottom) |
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347 | { |
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348 | if (top - middle > middle - bottom) |
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349 | { |
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350 | /* Bottom segment is the short one. */ |
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351 | int len = middle - bottom; |
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352 | register int i; |
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353 | |||
354 | /* Swap it with the top part of the top segment. */ |
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355 | for (i = 0; i < len; i++) |
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356 | { |
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357 | tem = argv[bottom + i]; |
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358 | argv[bottom + i] = argv[top - (middle - bottom) + i]; |
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359 | argv[top - (middle - bottom) + i] = tem; |
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360 | SWAP_FLAGS (bottom + i, top - (middle - bottom) + i); |
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361 | } |
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362 | /* Exclude the moved bottom segment from further swapping. */ |
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363 | top -= len; |
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364 | } |
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365 | else |
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366 | { |
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367 | /* Top segment is the short one. */ |
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368 | int len = top - middle; |
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369 | register int i; |
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370 | |||
371 | /* Swap it with the bottom part of the bottom segment. */ |
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372 | for (i = 0; i < len; i++) |
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373 | { |
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374 | tem = argv[bottom + i]; |
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375 | argv[bottom + i] = argv[middle + i]; |
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376 | argv[middle + i] = tem; |
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377 | SWAP_FLAGS (bottom + i, middle + i); |
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378 | } |
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379 | /* Exclude the moved top segment from further swapping. */ |
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380 | bottom += len; |
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381 | } |
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382 | } |
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383 | |||
384 | /* Update records for the slots the non-options now occupy. */ |
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385 | |||
386 | first_nonopt += (optind - last_nonopt); |
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387 | last_nonopt = optind; |
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388 | } |
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389 | |||
390 | /* Initialize the internal data when the first call is made. */ |
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391 | |||
392 | #if defined __STDC__ && __STDC__ |
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393 | static const char *_getopt_initialize (int, char *const *, const char *); |
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394 | #endif |
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395 | static const char * |
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396 | _getopt_initialize (int argc ATTRIBUTE_UNUSED, |
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397 | char *const *argv ATTRIBUTE_UNUSED, |
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398 | const char *optstring) |
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399 | { |
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400 | /* Start processing options with ARGV-element 1 (since ARGV-element 0 |
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401 | is the program name); the sequence of previously skipped |
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402 | non-option ARGV-elements is empty. */ |
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403 | |||
404 | first_nonopt = last_nonopt = optind; |
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405 | |||
406 | nextchar = NULL; |
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407 | |||
408 | posixly_correct = NULL; |
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409 | |||
410 | /* Determine how to handle the ordering of options and nonoptions. */ |
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411 | |||
412 | if (optstring[0] == '-') |
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413 | { |
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414 | ordering = RETURN_IN_ORDER; |
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415 | ++optstring; |
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416 | } |
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417 | else if (optstring[0] == '+') |
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418 | { |
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419 | ordering = REQUIRE_ORDER; |
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420 | ++optstring; |
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421 | } |
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422 | else if (posixly_correct != NULL) |
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423 | ordering = REQUIRE_ORDER; |
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424 | else |
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425 | ordering = PERMUTE; |
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426 | |||
427 | #ifdef _LIBC |
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428 | if (posixly_correct == NULL |
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429 | && argc == original_argc && argv == original_argv) |
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430 | { |
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431 | if (nonoption_flags_max_len == 0) |
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432 | { |
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433 | if (__getopt_nonoption_flags == NULL |
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434 | || __getopt_nonoption_flags[0] == '\0') |
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435 | nonoption_flags_max_len = -1; |
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436 | else |
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437 | { |
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438 | const char *orig_str = __getopt_nonoption_flags; |
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439 | int len = nonoption_flags_max_len = strlen (orig_str); |
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440 | if (nonoption_flags_max_len < argc) |
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441 | nonoption_flags_max_len = argc; |
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442 | __getopt_nonoption_flags = |
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443 | (char *) malloc (nonoption_flags_max_len); |
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444 | if (__getopt_nonoption_flags == NULL) |
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445 | nonoption_flags_max_len = -1; |
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446 | else |
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447 | memset (mempcpy (__getopt_nonoption_flags, orig_str, len), |
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448 | '\0', nonoption_flags_max_len - len); |
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449 | } |
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450 | } |
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451 | nonoption_flags_len = nonoption_flags_max_len; |
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452 | } |
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453 | else |
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454 | nonoption_flags_len = 0; |
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455 | #endif |
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456 | |||
457 | return optstring; |
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458 | } |
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459 | |||
460 | /* Scan elements of ARGV (whose length is ARGC) for option characters |
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461 | given in OPTSTRING. |
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462 | |||
463 | If an element of ARGV starts with '-', and is not exactly "-" or "--", |
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464 | then it is an option element. The characters of this element |
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465 | (aside from the initial '-') are option characters. If `getopt' |
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466 | is called repeatedly, it returns successively each of the option characters |
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467 | from each of the option elements. |
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468 | |||
469 | If `getopt' finds another option character, it returns that character, |
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470 | updating `optind' and `nextchar' so that the next call to `getopt' can |
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471 | resume the scan with the following option character or ARGV-element. |
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472 | |||
473 | If there are no more option characters, `getopt' returns -1. |
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474 | Then `optind' is the index in ARGV of the first ARGV-element |
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475 | that is not an option. (The ARGV-elements have been permuted |
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476 | so that those that are not options now come last.) |
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477 | |||
478 | OPTSTRING is a string containing the legitimate option characters. |
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479 | If an option character is seen that is not listed in OPTSTRING, |
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480 | return '?' after printing an error message. If you set `opterr' to |
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481 | zero, the error message is suppressed but we still return '?'. |
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482 | |||
483 | If a char in OPTSTRING is followed by a colon, that means it wants an arg, |
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484 | so the following text in the same ARGV-element, or the text of the following |
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485 | ARGV-element, is returned in `optarg'. Two colons mean an option that |
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486 | wants an optional arg; if there is text in the current ARGV-element, |
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487 | it is returned in `optarg', otherwise `optarg' is set to zero. |
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488 | |||
489 | If OPTSTRING starts with `-' or `+', it requests different methods of |
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490 | handling the non-option ARGV-elements. |
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491 | See the comments about RETURN_IN_ORDER and REQUIRE_ORDER, above. |
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492 | |||
493 | Long-named options begin with `--' instead of `-'. |
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494 | Their names may be abbreviated as long as the abbreviation is unique |
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495 | or is an exact match for some defined option. If they have an |
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496 | argument, it follows the option name in the same ARGV-element, separated |
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497 | from the option name by a `=', or else the in next ARGV-element. |
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498 | When `getopt' finds a long-named option, it returns 0 if that option's |
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499 | `flag' field is nonzero, the value of the option's `val' field |
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500 | if the `flag' field is zero. |
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501 | |||
502 | The elements of ARGV aren't really const, because we permute them. |
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503 | But we pretend they're const in the prototype to be compatible |
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504 | with other systems. |
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505 | |||
506 | LONGOPTS is a vector of `struct option' terminated by an |
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507 | element containing a name which is zero. |
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508 | |||
509 | LONGIND returns the index in LONGOPT of the long-named option found. |
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510 | It is only valid when a long-named option has been found by the most |
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511 | recent call. |
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512 | |||
513 | If LONG_ONLY is nonzero, '-' as well as '--' can introduce |
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514 | long-named options. */ |
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515 | |||
516 | int |
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517 | _getopt_internal (int argc, char *const *argv, const char *optstring, |
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518 | const struct option *longopts, |
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519 | int *longind, int long_only) |
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520 | { |
||
521 | optarg = NULL; |
||
522 | |||
523 | if (!__getopt_initialized) |
||
524 | { |
||
525 | optind = 0; |
||
526 | optstring = _getopt_initialize (argc, argv, optstring); |
||
527 | __getopt_initialized = 1; |
||
528 | } |
||
529 | |||
530 | /* Test whether ARGV[optind] points to a non-option argument. |
||
531 | Either it does not have option syntax, or there is an environment flag |
||
532 | from the shell indicating it is not an option. The later information |
||
533 | is only used when the used in the GNU libc. */ |
||
534 | #ifdef _LIBC |
||
535 | # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0' \ |
||
536 | || (optind < nonoption_flags_len \ |
||
537 | && __getopt_nonoption_flags[optind] == '1')) |
||
538 | #else |
||
539 | # define NONOPTION_P (argv[optind][0] != '-' || argv[optind][1] == '\0') |
||
540 | #endif |
||
541 | |||
542 | if (nextchar == NULL || *nextchar == '\0') |
||
543 | { |
||
544 | /* Advance to the next ARGV-element. */ |
||
545 | |||
546 | /* Give FIRST_NONOPT & LAST_NONOPT rational values if OPTIND has been |
||
547 | moved back by the user (who may also have changed the arguments). */ |
||
548 | if (last_nonopt > optind) |
||
549 | last_nonopt = optind; |
||
550 | if (first_nonopt > optind) |
||
551 | first_nonopt = optind; |
||
552 | |||
553 | if (ordering == PERMUTE) |
||
554 | { |
||
555 | /* If we have just processed some options following some non-options, |
||
556 | exchange them so that the options come first. */ |
||
557 | |||
558 | if (first_nonopt != last_nonopt && last_nonopt != optind) |
||
559 | exchange ((char **) argv); |
||
560 | else if (last_nonopt != optind) |
||
561 | first_nonopt = optind; |
||
562 | |||
563 | /* Skip any additional non-options |
||
564 | and extend the range of non-options previously skipped. */ |
||
565 | |||
566 | while (optind < argc && NONOPTION_P) |
||
567 | optind++; |
||
568 | last_nonopt = optind; |
||
569 | } |
||
570 | |||
571 | /* The special ARGV-element `--' means premature end of options. |
||
572 | Skip it like a null option, |
||
573 | then exchange with previous non-options as if it were an option, |
||
574 | then skip everything else like a non-option. */ |
||
575 | |||
576 | if (optind != argc && !strcmp (argv[optind], "--")) |
||
577 | { |
||
578 | optind++; |
||
579 | |||
580 | if (first_nonopt != last_nonopt && last_nonopt != optind) |
||
581 | exchange ((char **) argv); |
||
582 | else if (first_nonopt == last_nonopt) |
||
583 | first_nonopt = optind; |
||
584 | last_nonopt = argc; |
||
585 | |||
586 | optind = argc; |
||
587 | } |
||
588 | |||
589 | /* If we have done all the ARGV-elements, stop the scan |
||
590 | and back over any non-options that we skipped and permuted. */ |
||
591 | |||
592 | if (optind == argc) |
||
593 | { |
||
594 | /* Set the next-arg-index to point at the non-options |
||
595 | that we previously skipped, so the caller will digest them. */ |
||
596 | if (first_nonopt != last_nonopt) |
||
597 | optind = first_nonopt; |
||
598 | return -1; |
||
599 | } |
||
600 | |||
601 | /* If we have come to a non-option and did not permute it, |
||
602 | either stop the scan or describe it to the caller and pass it by. */ |
||
603 | |||
604 | if (NONOPTION_P) |
||
605 | { |
||
606 | if (ordering == REQUIRE_ORDER) |
||
607 | return -1; |
||
608 | optarg = argv[optind++]; |
||
609 | return 1; |
||
610 | } |
||
611 | |||
612 | /* We have found another option-ARGV-element. |
||
613 | Skip the initial punctuation. */ |
||
614 | |||
615 | nextchar = (argv[optind] + 1 |
||
616 | + (longopts != NULL && argv[optind][1] == '-')); |
||
617 | } |
||
618 | |||
619 | /* Decode the current option-ARGV-element. */ |
||
620 | |||
621 | /* Check whether the ARGV-element is a long option. |
||
622 | |||
623 | If long_only and the ARGV-element has the form "-f", where f is |
||
624 | a valid short option, don't consider it an abbreviated form of |
||
625 | a long option that starts with f. Otherwise there would be no |
||
626 | way to give the -f short option. |
||
627 | |||
628 | On the other hand, if there's a long option "fubar" and |
||
629 | the ARGV-element is "-fu", do consider that an abbreviation of |
||
630 | the long option, just like "--fu", and not "-f" with arg "u". |
||
631 | |||
632 | This distinction seems to be the most useful approach. */ |
||
633 | |||
634 | if (longopts != NULL |
||
635 | && (argv[optind][1] == '-' |
||
636 | || (long_only && (argv[optind][2] || !my_index (optstring, argv[optind][1]))))) |
||
637 | { |
||
638 | char *nameend; |
||
639 | const struct option *p; |
||
640 | const struct option *pfound = NULL; |
||
641 | int exact = 0; |
||
642 | int ambig = 0; |
||
643 | int indfound = -1; |
||
644 | int option_index; |
||
645 | |||
646 | for (nameend = nextchar; *nameend && *nameend != '='; nameend++) |
||
647 | /* Do nothing. */ ; |
||
648 | |||
649 | /* Test all long options for either exact match |
||
650 | or abbreviated matches. */ |
||
651 | for (p = longopts, option_index = 0; p->name; p++, option_index++) |
||
652 | if (!strncmp (p->name, nextchar, nameend - nextchar)) |
||
653 | { |
||
654 | if ((unsigned int) (nameend - nextchar) |
||
655 | == (unsigned int) strlen (p->name)) |
||
656 | { |
||
657 | /* Exact match found. */ |
||
658 | pfound = p; |
||
659 | indfound = option_index; |
||
660 | exact = 1; |
||
661 | break; |
||
662 | } |
||
663 | else if (pfound == NULL) |
||
664 | { |
||
665 | /* First nonexact match found. */ |
||
666 | pfound = p; |
||
667 | indfound = option_index; |
||
668 | } |
||
669 | else |
||
670 | /* Second or later nonexact match found. */ |
||
671 | ambig = 1; |
||
672 | } |
||
673 | |||
674 | if (ambig && !exact) |
||
675 | { |
||
676 | if (opterr) |
||
677 | printf ("%s: option `%s' is ambiguous\n", |
||
678 | argv[0], argv[optind]); |
||
679 | nextchar += strlen (nextchar); |
||
680 | optind++; |
||
681 | optopt = 0; |
||
682 | return '?'; |
||
683 | } |
||
684 | |||
685 | if (pfound != NULL) |
||
686 | { |
||
687 | option_index = indfound; |
||
688 | optind++; |
||
689 | if (*nameend) |
||
690 | { |
||
691 | /* Don't test has_arg with >, because some C compilers don't |
||
692 | allow it to be used on enums. */ |
||
693 | if (pfound->has_arg) |
||
694 | optarg = nameend + 1; |
||
695 | else |
||
696 | { |
||
697 | if (opterr) |
||
698 | { |
||
699 | if (argv[optind - 1][1] == '-') |
||
700 | /* --option */ |
||
701 | printf ("%s: option `--%s' doesn't allow an argument\n", |
||
702 | argv[0], pfound->name); |
||
703 | else |
||
704 | /* +option or -option */ |
||
705 | printf ("%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 | printf ("%s: option `%s' requires an argument\n", |
||
723 | argv[0], argv[optind - 1]); |
||
724 | nextchar += strlen (nextchar); |
||
725 | optopt = pfound->val; |
||
726 | return optstring[0] == ':' ? ':' : '?'; |
||
727 | } |
||
728 | } |
||
729 | nextchar += strlen (nextchar); |
||
730 | if (longind != NULL) |
||
731 | *longind = option_index; |
||
732 | if (pfound->flag) |
||
733 | { |
||
734 | *(pfound->flag) = pfound->val; |
||
735 | return 0; |
||
736 | } |
||
737 | return pfound->val; |
||
738 | } |
||
739 | |||
740 | /* Can't find it as a long option. If this is not getopt_long_only, |
||
741 | or the option starts with '--' or is not a valid short |
||
742 | option, then it's an error. |
||
743 | Otherwise interpret it as a short option. */ |
||
744 | if (!long_only || argv[optind][1] == '-' |
||
745 | || my_index (optstring, *nextchar) == NULL) |
||
746 | { |
||
747 | if (opterr) |
||
748 | { |
||
749 | if (argv[optind][1] == '-') |
||
750 | /* --option */ |
||
751 | printf ("%s: unrecognized option `--%s'\n", |
||
752 | argv[0], nextchar); |
||
753 | else |
||
754 | /* +option or -option */ |
||
755 | printf ("%s: unrecognized option `%c%s'\n", |
||
756 | argv[0], argv[optind][0], nextchar); |
||
757 | } |
||
758 | nextchar = (char *) ""; |
||
759 | optind++; |
||
760 | optopt = 0; |
||
761 | return '?'; |
||
762 | } |
||
763 | } |
||
764 | |||
765 | /* Look at and handle the next short option-character. */ |
||
766 | |||
767 | { |
||
768 | char c = *nextchar++; |
||
769 | char *temp = my_index (optstring, c); |
||
770 | |||
771 | /* Increment `optind' when we start to process its last character. */ |
||
772 | if (*nextchar == '\0') |
||
773 | ++optind; |
||
774 | |||
775 | if (temp == NULL || c == ':') |
||
776 | { |
||
777 | if (opterr) |
||
778 | { |
||
779 | if (posixly_correct) |
||
780 | /* 1003.2 specifies the format of this message. */ |
||
781 | printf ("%s: illegal option -- %c\n", |
||
782 | argv[0], c); |
||
783 | else |
||
784 | printf ("%s: invalid option -- %c\n", |
||
785 | argv[0], c); |
||
786 | } |
||
787 | optopt = c; |
||
788 | return '?'; |
||
789 | } |
||
790 | /* Convenience. Treat POSIX -W foo same as long option --foo */ |
||
791 | if (temp[0] == 'W' && temp[1] == ';') |
||
792 | { |
||
793 | char *nameend; |
||
794 | const struct option *p; |
||
795 | const struct option *pfound = NULL; |
||
796 | int exact = 0; |
||
797 | int ambig = 0; |
||
798 | int indfound = 0; |
||
799 | int option_index; |
||
800 | |||
801 | /* This is an option that requires an argument. */ |
||
802 | if (*nextchar != '\0') |
||
803 | { |
||
804 | optarg = nextchar; |
||
805 | /* If we end this ARGV-element by taking the rest as an arg, |
||
806 | we must advance to the next element now. */ |
||
807 | optind++; |
||
808 | } |
||
809 | else if (optind == argc) |
||
810 | { |
||
811 | if (opterr) |
||
812 | { |
||
813 | /* 1003.2 specifies the format of this message. */ |
||
814 | printf ("%s: option requires an argument -- %c\n", |
||
815 | argv[0], c); |
||
816 | } |
||
817 | optopt = c; |
||
818 | if (optstring[0] == ':') |
||
819 | c = ':'; |
||
820 | else |
||
821 | c = '?'; |
||
822 | return c; |
||
823 | } |
||
824 | else |
||
825 | /* We already incremented `optind' once; |
||
826 | increment it again when taking next ARGV-elt as argument. */ |
||
827 | optarg = argv[optind++]; |
||
828 | |||
829 | /* optarg is now the argument, see if it's in the |
||
830 | table of longopts. */ |
||
831 | |||
832 | for (nextchar = nameend = optarg; *nameend && *nameend != '='; nameend++) |
||
833 | /* Do nothing. */ ; |
||
834 | |||
835 | /* Test all long options for either exact match |
||
836 | or abbreviated matches. */ |
||
837 | for (p = longopts, option_index = 0; p->name; p++, option_index++) |
||
838 | if (!strncmp (p->name, nextchar, nameend - nextchar)) |
||
839 | { |
||
840 | if ((unsigned int) (nameend - nextchar) == strlen (p->name)) |
||
841 | { |
||
842 | /* Exact match found. */ |
||
843 | pfound = p; |
||
844 | indfound = option_index; |
||
845 | exact = 1; |
||
846 | break; |
||
847 | } |
||
848 | else if (pfound == NULL) |
||
849 | { |
||
850 | /* First nonexact match found. */ |
||
851 | pfound = p; |
||
852 | indfound = option_index; |
||
853 | } |
||
854 | else |
||
855 | /* Second or later nonexact match found. */ |
||
856 | ambig = 1; |
||
857 | } |
||
858 | if (ambig && !exact) |
||
859 | { |
||
860 | if (opterr) |
||
861 | printf ("%s: option `-W %s' is ambiguous\n", |
||
862 | argv[0], argv[optind]); |
||
863 | nextchar += strlen (nextchar); |
||
864 | optind++; |
||
865 | return '?'; |
||
866 | } |
||
867 | if (pfound != NULL) |
||
868 | { |
||
869 | option_index = indfound; |
||
870 | if (*nameend) |
||
871 | { |
||
872 | /* Don't test has_arg with >, because some C compilers don't |
||
873 | allow it to be used on enums. */ |
||
874 | if (pfound->has_arg) |
||
875 | optarg = nameend + 1; |
||
876 | else |
||
877 | { |
||
878 | if (opterr) |
||
879 | printf ("\%s: option `-W %s' doesn't allow an argument\n", |
||
880 | argv[0], pfound->name); |
||
881 | |||
882 | nextchar += strlen (nextchar); |
||
883 | return '?'; |
||
884 | } |
||
885 | } |
||
886 | else if (pfound->has_arg == 1) |
||
887 | { |
||
888 | if (optind < argc) |
||
889 | optarg = argv[optind++]; |
||
890 | else |
||
891 | { |
||
892 | if (opterr) |
||
893 | printf ("%s: option `%s' requires an argument\n", |
||
894 | argv[0], argv[optind - 1]); |
||
895 | nextchar += strlen (nextchar); |
||
896 | return optstring[0] == ':' ? ':' : '?'; |
||
897 | } |
||
898 | } |
||
899 | nextchar += strlen (nextchar); |
||
900 | if (longind != NULL) |
||
901 | *longind = option_index; |
||
902 | if (pfound->flag) |
||
903 | { |
||
904 | *(pfound->flag) = pfound->val; |
||
905 | return 0; |
||
906 | } |
||
907 | return pfound->val; |
||
908 | } |
||
909 | nextchar = NULL; |
||
910 | return 'W'; /* Let the application handle it. */ |
||
911 | } |
||
912 | if (temp[1] == ':') |
||
913 | { |
||
914 | if (temp[2] == ':') |
||
915 | { |
||
916 | /* This is an option that accepts an argument optionally. */ |
||
917 | if (*nextchar != '\0') |
||
918 | { |
||
919 | optarg = nextchar; |
||
920 | optind++; |
||
921 | } |
||
922 | else |
||
923 | optarg = NULL; |
||
924 | nextchar = NULL; |
||
925 | } |
||
926 | else |
||
927 | { |
||
928 | /* This is an option that requires an argument. */ |
||
929 | if (*nextchar != '\0') |
||
930 | { |
||
931 | optarg = nextchar; |
||
932 | /* If we end this ARGV-element by taking the rest as an arg, |
||
933 | we must advance to the next element now. */ |
||
934 | optind++; |
||
935 | } |
||
936 | else if (optind == argc) |
||
937 | { |
||
938 | if (opterr) |
||
939 | { |
||
940 | /* 1003.2 specifies the format of this message. */ |
||
941 | printf ("%s: option requires an argument -- %c\n", |
||
942 | argv[0], c); |
||
943 | } |
||
944 | optopt = c; |
||
945 | if (optstring[0] == ':') |
||
946 | c = ':'; |
||
947 | else |
||
948 | c = '?'; |
||
949 | } |
||
950 | else |
||
951 | /* We already incremented `optind' once; |
||
952 | increment it again when taking next ARGV-elt as argument. */ |
||
953 | optarg = argv[optind++]; |
||
954 | nextchar = NULL; |
||
955 | } |
||
956 | } |
||
957 | return c; |
||
958 | } |
||
959 | } |
||
960 | |||
961 | int |
||
962 | getopt (int argc, char *const *argv, const char *optstring) |
||
963 | { |
||
964 | return _getopt_internal (argc, argv, optstring, |
||
965 | (const struct option *) 0, |
||
966 | (int *) 0, |
||
967 | 0); |
||
968 | } |
||
969 | |||
970 | #endif /* Not ELIDE_CODE. */ |
||
971 | |||
972 | #ifdef TEST |
||
973 | |||
974 | /* Compile with -DTEST to make an executable for use in testing |
||
975 | the above definition of `getopt'. */ |
||
976 | |||
977 | int |
||
978 | main (int argc, char **argv) |
||
979 | { |
||
980 | int c; |
||
981 | int digit_optind = 0; |
||
982 | |||
983 | while (1) |
||
984 | { |
||
985 | int this_option_optind = optind ? optind : 1; |
||
986 | |||
987 | c = getopt (argc, argv, "abc:d:0123456789"); |
||
988 | if (c == -1) |
||
989 | break; |
||
990 | |||
991 | switch (c) |
||
992 | { |
||
993 | case '0': |
||
994 | case '1': |
||
995 | case '2': |
||
996 | case '3': |
||
997 | case '4': |
||
998 | case '5': |
||
999 | case '6': |
||
1000 | case '7': |
||
1001 | case '8': |
||
1002 | case '9': |
||
1003 | if (digit_optind != 0 && digit_optind != this_option_optind) |
||
1004 | printf ("digits occur in two different argv-elements.\n"); |
||
1005 | digit_optind = this_option_optind; |
||
1006 | printf ("option %c\n", c); |
||
1007 | break; |
||
1008 | |||
1009 | case 'a': |
||
1010 | printf ("option a\n"); |
||
1011 | break; |
||
1012 | |||
1013 | case 'b': |
||
1014 | printf ("option b\n"); |
||
1015 | break; |
||
1016 | |||
1017 | case 'c': |
||
1018 | printf ("option c with value `%s'\n", optarg); |
||
1019 | break; |
||
1020 | |||
1021 | case '?': |
||
1022 | break; |
||
1023 | |||
1024 | default: |
||
1025 | printf ("?? getopt returned character code 0%o ??\n", c); |
||
1026 | } |
||
1027 | } |
||
1028 | |||
1029 | if (optind < argc) |
||
1030 | { |
||
1031 | printf ("non-option ARGV-elements: "); |
||
1032 | while (optind < argc) |
||
1033 | printf ("%s ", argv[optind++]); |
||
1034 | printf ("\n"); |
||
1035 | } |
||
1036 | |||
1037 | exit (0); |
||
1038 | } |
||
1039 | |||
1040 | #endif /* TEST */>>>>>>>>> |