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72b16652 |
1 | package File::Glob; |
2 | |
3 | use strict; |
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4 | our($VERSION, @ISA, @EXPORT_OK, @EXPORT_FAIL, %EXPORT_TAGS, |
5 | $AUTOLOAD, $DEFAULT_FLAGS); |
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6 | |
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7 | use XSLoader (); |
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8 | |
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9 | @ISA = qw(Exporter AutoLoader); |
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10 | |
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11 | # NOTE: The glob() export is only here for compatibility with 5.6.0. |
12 | # csh_glob() should not be used directly, unless you know what you're doing. |
13 | |
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14 | @EXPORT_OK = qw( |
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15 | csh_glob |
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16 | bsd_glob |
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17 | glob |
18 | GLOB_ABEND |
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19 | GLOB_ALPHASORT |
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20 | GLOB_ALTDIRFUNC |
21 | GLOB_BRACE |
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22 | GLOB_CSH |
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23 | GLOB_ERR |
24 | GLOB_ERROR |
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25 | GLOB_LIMIT |
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26 | GLOB_MARK |
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27 | GLOB_NOCASE |
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28 | GLOB_NOCHECK |
29 | GLOB_NOMAGIC |
30 | GLOB_NOSORT |
31 | GLOB_NOSPACE |
32 | GLOB_QUOTE |
33 | GLOB_TILDE |
34 | ); |
35 | |
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36 | %EXPORT_TAGS = ( |
37 | 'glob' => [ qw( |
38 | GLOB_ABEND |
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39 | GLOB_ALPHASORT |
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40 | GLOB_ALTDIRFUNC |
41 | GLOB_BRACE |
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42 | GLOB_CSH |
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43 | GLOB_ERR |
44 | GLOB_ERROR |
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45 | GLOB_LIMIT |
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46 | GLOB_MARK |
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47 | GLOB_NOCASE |
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48 | GLOB_NOCHECK |
49 | GLOB_NOMAGIC |
50 | GLOB_NOSORT |
51 | GLOB_NOSPACE |
52 | GLOB_QUOTE |
53 | GLOB_TILDE |
54 | glob |
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55 | bsd_glob |
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56 | ) ], |
57 | ); |
58 | |
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59 | $VERSION = '1.0'; |
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60 | |
61 | sub import { |
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62 | require Exporter; |
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63 | my $i = 1; |
64 | while ($i < @_) { |
65 | if ($_[$i] =~ /^:(case|nocase|globally)$/) { |
66 | splice(@_, $i, 1); |
67 | $DEFAULT_FLAGS &= ~GLOB_NOCASE() if $1 eq 'case'; |
68 | $DEFAULT_FLAGS |= GLOB_NOCASE() if $1 eq 'nocase'; |
69 | if ($1 eq 'globally') { |
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70 | local $^W; |
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71 | *CORE::GLOBAL::glob = \&File::Glob::csh_glob; |
72 | } |
73 | next; |
74 | } |
75 | ++$i; |
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76 | } |
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77 | goto &Exporter::import; |
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78 | } |
79 | |
80 | sub AUTOLOAD { |
81 | # This AUTOLOAD is used to 'autoload' constants from the constant() |
82 | # XS function. If a constant is not found then control is passed |
83 | # to the AUTOLOAD in AutoLoader. |
84 | |
85 | my $constname; |
86 | ($constname = $AUTOLOAD) =~ s/.*:://; |
87 | my $val = constant($constname, @_ ? $_[0] : 0); |
88 | if ($! != 0) { |
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89 | if ($! =~ /Invalid/ || $!{EINVAL}) { |
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90 | require AutoLoader; |
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91 | $AutoLoader::AUTOLOAD = $AUTOLOAD; |
92 | goto &AutoLoader::AUTOLOAD; |
93 | } |
94 | else { |
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95 | require Carp; |
96 | Carp::croak("Your vendor has not defined File::Glob macro $constname"); |
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97 | } |
98 | } |
99 | eval "sub $AUTOLOAD { $val }"; |
100 | goto &$AUTOLOAD; |
101 | } |
102 | |
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103 | XSLoader::load 'File::Glob', $VERSION; |
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104 | |
105 | # Preloaded methods go here. |
106 | |
107 | sub GLOB_ERROR { |
108 | return constant('GLOB_ERROR', 0); |
109 | } |
110 | |
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111 | sub GLOB_CSH () { |
112 | GLOB_BRACE() |
113 | | GLOB_NOMAGIC() |
114 | | GLOB_QUOTE() |
115 | | GLOB_TILDE() |
116 | | GLOB_ALPHASORT() |
117 | } |
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118 | |
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119 | $DEFAULT_FLAGS = GLOB_CSH(); |
120 | if ($^O =~ /^(?:MSWin32|VMS|os2|dos|riscos|MacOS)$/) { |
121 | $DEFAULT_FLAGS |= GLOB_NOCASE(); |
122 | } |
123 | |
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124 | # Autoload methods go after =cut, and are processed by the autosplit program. |
125 | |
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126 | sub bsd_glob { |
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127 | my ($pat,$flags) = @_; |
128 | $flags = $DEFAULT_FLAGS if @_ < 2; |
129 | return doglob($pat,$flags); |
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130 | } |
131 | |
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132 | # File::Glob::glob() is deprecated because its prototype is different from |
133 | # CORE::glob() (use bsd_glob() instead) |
134 | sub glob { |
135 | goto &bsd_glob; |
136 | } |
137 | |
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138 | ## borrowed heavily from gsar's File::DosGlob |
139 | my %iter; |
140 | my %entries; |
141 | |
142 | sub csh_glob { |
143 | my $pat = shift; |
144 | my $cxix = shift; |
145 | my @pat; |
146 | |
147 | # glob without args defaults to $_ |
148 | $pat = $_ unless defined $pat; |
149 | |
150 | # extract patterns |
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151 | $pat =~ s/^\s+//; # Protect against empty elements in |
152 | $pat =~ s/\s+$//; # things like < *.c> and <*.c >. |
153 | # These alone shouldn't trigger ParseWords. |
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154 | if ($pat =~ /\s/) { |
155 | # XXX this is needed for compatibility with the csh |
156 | # implementation in Perl. Need to support a flag |
157 | # to disable this behavior. |
158 | require Text::ParseWords; |
159 | @pat = Text::ParseWords::parse_line('\s+',0,$pat); |
160 | } |
161 | |
162 | # assume global context if not provided one |
163 | $cxix = '_G_' unless defined $cxix; |
164 | $iter{$cxix} = 0 unless exists $iter{$cxix}; |
165 | |
166 | # if we're just beginning, do it all first |
167 | if ($iter{$cxix} == 0) { |
168 | if (@pat) { |
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169 | $entries{$cxix} = [ map { doglob($_, $DEFAULT_FLAGS) } @pat ]; |
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170 | } |
171 | else { |
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172 | $entries{$cxix} = [ doglob($pat, $DEFAULT_FLAGS) ]; |
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173 | } |
174 | } |
175 | |
176 | # chuck it all out, quick or slow |
177 | if (wantarray) { |
178 | delete $iter{$cxix}; |
179 | return @{delete $entries{$cxix}}; |
180 | } |
181 | else { |
182 | if ($iter{$cxix} = scalar @{$entries{$cxix}}) { |
183 | return shift @{$entries{$cxix}}; |
184 | } |
185 | else { |
186 | # return undef for EOL |
187 | delete $iter{$cxix}; |
188 | delete $entries{$cxix}; |
189 | return undef; |
190 | } |
191 | } |
192 | } |
193 | |
194 | 1; |
195 | __END__ |
196 | |
197 | =head1 NAME |
198 | |
199 | File::Glob - Perl extension for BSD glob routine |
200 | |
201 | =head1 SYNOPSIS |
202 | |
203 | use File::Glob ':glob'; |
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204 | @list = bsd_glob('*.[ch]'); |
205 | $homedir = bsd_glob('~gnat', GLOB_TILDE | GLOB_ERR); |
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206 | if (GLOB_ERROR) { |
207 | # an error occurred reading $homedir |
208 | } |
209 | |
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210 | ## override the core glob (CORE::glob() does this automatically |
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211 | ## by default anyway, since v5.6.0) |
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212 | use File::Glob ':globally'; |
213 | my @sources = <*.{c,h,y}> |
214 | |
215 | ## override the core glob, forcing case sensitivity |
216 | use File::Glob qw(:globally :case); |
217 | my @sources = <*.{c,h,y}> |
218 | |
219 | ## override the core glob forcing case insensitivity |
220 | use File::Glob qw(:globally :nocase); |
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221 | my @sources = <*.{c,h,y}> |
222 | |
223 | =head1 DESCRIPTION |
224 | |
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225 | File::Glob::bsd_glob() implements the FreeBSD glob(3) routine, which is |
226 | a superset of the POSIX glob() (described in IEEE Std 1003.2 "POSIX.2"). |
227 | bsd_glob() takes a mandatory C<pattern> argument, and an optional |
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228 | C<flags> argument, and returns a list of filenames matching the |
229 | pattern, with interpretation of the pattern modified by the C<flags> |
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230 | variable. |
231 | |
232 | Since v5.6.0, Perl's CORE::glob() is implemented in terms of bsd_glob(). |
233 | Note that they don't share the same prototype--CORE::glob() only accepts |
234 | a single argument. Due to historical reasons, CORE::glob() will also |
235 | split its argument on whitespace, treating it as multiple patterns, |
236 | whereas bsd_glob() considers them as one pattern. |
237 | |
238 | The POSIX defined flags for bsd_glob() are: |
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239 | |
240 | =over 4 |
241 | |
242 | =item C<GLOB_ERR> |
243 | |
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244 | Force bsd_glob() to return an error when it encounters a directory it |
245 | cannot open or read. Ordinarily bsd_glob() continues to find matches. |
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246 | |
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247 | =item C<GLOB_LIMIT> |
248 | |
249 | Make bsd_glob() return an error (GLOB_NOSPACE) when the pattern expands |
250 | to a size bigger than the system constant C<ARG_MAX> (usually found in |
251 | limits.h). If your system does not define this constant, bsd_glob() uses |
252 | C<sysconf(_SC_ARG_MAX)> or C<_POSIX_ARG_MAX> where available (in that |
253 | order). You can inspect these values using the standard C<POSIX> |
254 | extension. |
255 | |
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256 | =item C<GLOB_MARK> |
257 | |
258 | Each pathname that is a directory that matches the pattern has a slash |
259 | appended. |
260 | |
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261 | =item C<GLOB_NOCASE> |
262 | |
263 | By default, file names are assumed to be case sensitive; this flag |
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264 | makes bsd_glob() treat case differences as not significant. |
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265 | |
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266 | =item C<GLOB_NOCHECK> |
267 | |
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268 | If the pattern does not match any pathname, then bsd_glob() returns a list |
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269 | consisting of only the pattern. If C<GLOB_QUOTE> is set, its effect |
270 | is present in the pattern returned. |
271 | |
272 | =item C<GLOB_NOSORT> |
273 | |
274 | By default, the pathnames are sorted in ascending ASCII order; this |
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275 | flag prevents that sorting (speeding up bsd_glob()). |
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276 | |
277 | =back |
278 | |
279 | The FreeBSD extensions to the POSIX standard are the following flags: |
280 | |
281 | =over 4 |
282 | |
283 | =item C<GLOB_BRACE> |
284 | |
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285 | Pre-process the string to expand C<{pat,pat,...}> strings like csh(1). |
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286 | The pattern '{}' is left unexpanded for historical reasons (and csh(1) |
287 | does the same thing to ease typing of find(1) patterns). |
288 | |
289 | =item C<GLOB_NOMAGIC> |
290 | |
291 | Same as C<GLOB_NOCHECK> but it only returns the pattern if it does not |
292 | contain any of the special characters "*", "?" or "[". C<NOMAGIC> is |
293 | provided to simplify implementing the historic csh(1) globbing |
294 | behaviour and should probably not be used anywhere else. |
295 | |
296 | =item C<GLOB_QUOTE> |
297 | |
298 | Use the backslash ('\') character for quoting: every occurrence of a |
299 | backslash followed by a character in the pattern is replaced by that |
300 | character, avoiding any special interpretation of the character. |
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301 | (But see below for exceptions on DOSISH systems). |
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302 | |
303 | =item C<GLOB_TILDE> |
304 | |
305 | Expand patterns that start with '~' to user name home directories. |
306 | |
307 | =item C<GLOB_CSH> |
308 | |
309 | For convenience, C<GLOB_CSH> is a synonym for |
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310 | C<GLOB_BRACE | GLOB_NOMAGIC | GLOB_QUOTE | GLOB_TILDE | GLOB_ALPHASORT>. |
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311 | |
312 | =back |
313 | |
314 | The POSIX provided C<GLOB_APPEND>, C<GLOB_DOOFFS>, and the FreeBSD |
315 | extensions C<GLOB_ALTDIRFUNC>, and C<GLOB_MAGCHAR> flags have not been |
316 | implemented in the Perl version because they involve more complex |
317 | interaction with the underlying C structures. |
318 | |
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319 | The following flag has been added in the Perl implementation for |
320 | csh compatibility: |
321 | |
322 | =over 4 |
323 | |
324 | =item C<GLOB_ALPHASORT> |
325 | |
326 | If C<GLOB_NOSORT> is not in effect, sort filenames is alphabetical |
327 | order (case does not matter) rather than in ASCII order. |
328 | |
329 | =back |
330 | |
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331 | =head1 DIAGNOSTICS |
332 | |
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333 | bsd_glob() returns a list of matching paths, possibly zero length. If an |
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334 | error occurred, &File::Glob::GLOB_ERROR will be non-zero and C<$!> will be |
335 | set. &File::Glob::GLOB_ERROR is guaranteed to be zero if no error occurred, |
336 | or one of the following values otherwise: |
337 | |
338 | =over 4 |
339 | |
340 | =item C<GLOB_NOSPACE> |
341 | |
342 | An attempt to allocate memory failed. |
343 | |
344 | =item C<GLOB_ABEND> |
345 | |
346 | The glob was stopped because an error was encountered. |
347 | |
348 | =back |
349 | |
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350 | In the case where bsd_glob() has found some matching paths, but is |
351 | interrupted by an error, it will return a list of filenames B<and> |
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352 | set &File::Glob::ERROR. |
353 | |
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354 | Note that bsd_glob() deviates from POSIX and FreeBSD glob(3) behaviour |
355 | by not considering C<ENOENT> and C<ENOTDIR> as errors - bsd_glob() will |
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356 | continue processing despite those errors, unless the C<GLOB_ERR> flag is |
357 | set. |
358 | |
359 | Be aware that all filenames returned from File::Glob are tainted. |
360 | |
361 | =head1 NOTES |
362 | |
363 | =over 4 |
364 | |
365 | =item * |
366 | |
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367 | If you want to use multiple patterns, e.g. C<bsd_glob "a* b*">, you should |
150b260b |
368 | probably throw them in a set as in C<bsd_glob "{a*,b*}">. This is because |
369 | the argument to bsd_glob() isn't subjected to parsing by the C shell. |
370 | Remember that you can use a backslash to escape things. |
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371 | |
372 | =item * |
373 | |
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374 | On DOSISH systems, backslash is a valid directory separator character. |
375 | In this case, use of backslash as a quoting character (via GLOB_QUOTE) |
376 | interferes with the use of backslash as a directory separator. The |
377 | best (simplest, most portable) solution is to use forward slashes for |
378 | directory separators, and backslashes for quoting. However, this does |
379 | not match "normal practice" on these systems. As a concession to user |
380 | expectation, therefore, backslashes (under GLOB_QUOTE) only quote the |
381 | glob metacharacters '[', ']', '{', '}', '-', '~', and backslash itself. |
382 | All other backslashes are passed through unchanged. |
383 | |
384 | =item * |
385 | |
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386 | Win32 users should use the real slash. If you really want to use |
387 | backslashes, consider using Sarathy's File::DosGlob, which comes with |
388 | the standard Perl distribution. |
389 | |
7369a524 |
390 | =item * |
391 | |
392 | Mac OS (Classic) users should note a few differences. Since |
393 | Mac OS is not Unix, when the glob code encounters a tilde glob (e.g. |
394 | ~user/foo) and the C<GLOB_TILDE> flag is used, it simply returns that |
395 | pattern without doing any expansion. |
396 | |
397 | Glob on Mac OS is case-insensitive by default (if you don't use any |
398 | flags). If you specify any flags at all and still want glob |
399 | to be case-insensitive, you must include C<GLOB_NOCASE> in the flags. |
400 | |
401 | The path separator is ':' (aka colon), not '/' (aka slash). Mac OS users |
402 | should be careful about specifying relative pathnames. While a full path |
403 | always begins with a volume name, a relative pathname should always |
404 | begin with a ':'. If specifying a volume name only, a trailing ':' is |
405 | required. |
406 | |
a45bd81d |
407 | =back |
408 | |
72b16652 |
409 | =head1 AUTHOR |
410 | |
0e950d83 |
411 | The Perl interface was written by Nathan Torkington E<lt>gnat@frii.comE<gt>, |
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412 | and is released under the artistic license. Further modifications were |
7369a524 |
413 | made by Greg Bacon E<lt>gbacon@cs.uah.eduE<gt>, Gurusamy Sarathy |
414 | E<lt>gsar@activestate.comE<gt>, and Thomas Wegner |
415 | E<lt>wegner_thomas@yahoo.comE<gt>. The C glob code has the |
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416 | following copyright: |
417 | |
0e950d83 |
418 | Copyright (c) 1989, 1993 The Regents of the University of California. |
419 | All rights reserved. |
3cb6de81 |
420 | |
0e950d83 |
421 | This code is derived from software contributed to Berkeley by |
422 | Guido van Rossum. |
423 | |
424 | Redistribution and use in source and binary forms, with or without |
425 | modification, are permitted provided that the following conditions |
426 | are met: |
427 | |
428 | 1. Redistributions of source code must retain the above copyright |
429 | notice, this list of conditions and the following disclaimer. |
430 | 2. Redistributions in binary form must reproduce the above copyright |
431 | notice, this list of conditions and the following disclaimer in the |
432 | documentation and/or other materials provided with the distribution. |
433 | 3. Neither the name of the University nor the names of its contributors |
434 | may be used to endorse or promote products derived from this software |
435 | without specific prior written permission. |
436 | |
437 | THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
438 | ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
439 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
440 | ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
441 | FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
442 | DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
443 | OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
444 | HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
445 | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
446 | OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
447 | SUCH DAMAGE. |
72b16652 |
448 | |
449 | =cut |