Commit | Line | Data |
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); |
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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 = '1.01'; |
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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 = $AUTOLOAD) =~ s/.*:://; |
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87 | my ($error, $val) = constant($constname); |
88 | if ($error) { |
89 | require Carp; |
90 | Carp::croak($error); |
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91 | } |
92 | eval "sub $AUTOLOAD { $val }"; |
93 | goto &$AUTOLOAD; |
94 | } |
95 | |
9426adcd |
96 | XSLoader::load 'File::Glob', $VERSION; |
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97 | |
98 | # Preloaded methods go here. |
99 | |
100 | sub GLOB_ERROR { |
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101 | return (constant('GLOB_ERROR'))[1]; |
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102 | } |
103 | |
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104 | sub GLOB_CSH () { |
105 | GLOB_BRACE() |
106 | | GLOB_NOMAGIC() |
107 | | GLOB_QUOTE() |
108 | | GLOB_TILDE() |
109 | | GLOB_ALPHASORT() |
110 | } |
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111 | |
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112 | $DEFAULT_FLAGS = GLOB_CSH(); |
113 | if ($^O =~ /^(?:MSWin32|VMS|os2|dos|riscos|MacOS)$/) { |
114 | $DEFAULT_FLAGS |= GLOB_NOCASE(); |
115 | } |
116 | |
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117 | # Autoload methods go after =cut, and are processed by the autosplit program. |
118 | |
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119 | sub bsd_glob { |
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120 | my ($pat,$flags) = @_; |
121 | $flags = $DEFAULT_FLAGS if @_ < 2; |
122 | return doglob($pat,$flags); |
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123 | } |
124 | |
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125 | # File::Glob::glob() is deprecated because its prototype is different from |
126 | # CORE::glob() (use bsd_glob() instead) |
127 | sub glob { |
128 | goto &bsd_glob; |
129 | } |
130 | |
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131 | ## borrowed heavily from gsar's File::DosGlob |
132 | my %iter; |
133 | my %entries; |
134 | |
135 | sub csh_glob { |
136 | my $pat = shift; |
137 | my $cxix = shift; |
138 | my @pat; |
139 | |
140 | # glob without args defaults to $_ |
141 | $pat = $_ unless defined $pat; |
142 | |
143 | # extract patterns |
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144 | $pat =~ s/^\s+//; # Protect against empty elements in |
145 | $pat =~ s/\s+$//; # things like < *.c> and <*.c >. |
146 | # These alone shouldn't trigger ParseWords. |
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147 | if ($pat =~ /\s/) { |
148 | # XXX this is needed for compatibility with the csh |
149 | # implementation in Perl. Need to support a flag |
150 | # to disable this behavior. |
151 | require Text::ParseWords; |
152 | @pat = Text::ParseWords::parse_line('\s+',0,$pat); |
153 | } |
154 | |
155 | # assume global context if not provided one |
156 | $cxix = '_G_' unless defined $cxix; |
157 | $iter{$cxix} = 0 unless exists $iter{$cxix}; |
158 | |
159 | # if we're just beginning, do it all first |
160 | if ($iter{$cxix} == 0) { |
161 | if (@pat) { |
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162 | $entries{$cxix} = [ map { doglob($_, $DEFAULT_FLAGS) } @pat ]; |
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163 | } |
164 | else { |
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165 | $entries{$cxix} = [ doglob($pat, $DEFAULT_FLAGS) ]; |
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166 | } |
167 | } |
168 | |
169 | # chuck it all out, quick or slow |
170 | if (wantarray) { |
171 | delete $iter{$cxix}; |
172 | return @{delete $entries{$cxix}}; |
173 | } |
174 | else { |
175 | if ($iter{$cxix} = scalar @{$entries{$cxix}}) { |
176 | return shift @{$entries{$cxix}}; |
177 | } |
178 | else { |
179 | # return undef for EOL |
180 | delete $iter{$cxix}; |
181 | delete $entries{$cxix}; |
182 | return undef; |
183 | } |
184 | } |
185 | } |
186 | |
187 | 1; |
188 | __END__ |
189 | |
190 | =head1 NAME |
191 | |
192 | File::Glob - Perl extension for BSD glob routine |
193 | |
194 | =head1 SYNOPSIS |
195 | |
196 | use File::Glob ':glob'; |
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197 | @list = bsd_glob('*.[ch]'); |
198 | $homedir = bsd_glob('~gnat', GLOB_TILDE | GLOB_ERR); |
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199 | if (GLOB_ERROR) { |
200 | # an error occurred reading $homedir |
201 | } |
202 | |
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203 | ## override the core glob (CORE::glob() does this automatically |
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204 | ## by default anyway, since v5.6.0) |
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205 | use File::Glob ':globally'; |
206 | my @sources = <*.{c,h,y}> |
207 | |
208 | ## override the core glob, forcing case sensitivity |
209 | use File::Glob qw(:globally :case); |
210 | my @sources = <*.{c,h,y}> |
211 | |
212 | ## override the core glob forcing case insensitivity |
213 | use File::Glob qw(:globally :nocase); |
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214 | my @sources = <*.{c,h,y}> |
215 | |
216 | =head1 DESCRIPTION |
217 | |
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218 | File::Glob::bsd_glob() implements the FreeBSD glob(3) routine, which is |
219 | a superset of the POSIX glob() (described in IEEE Std 1003.2 "POSIX.2"). |
220 | bsd_glob() takes a mandatory C<pattern> argument, and an optional |
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221 | C<flags> argument, and returns a list of filenames matching the |
222 | pattern, with interpretation of the pattern modified by the C<flags> |
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223 | variable. |
224 | |
225 | Since v5.6.0, Perl's CORE::glob() is implemented in terms of bsd_glob(). |
226 | Note that they don't share the same prototype--CORE::glob() only accepts |
227 | a single argument. Due to historical reasons, CORE::glob() will also |
228 | split its argument on whitespace, treating it as multiple patterns, |
229 | whereas bsd_glob() considers them as one pattern. |
230 | |
231 | The POSIX defined flags for bsd_glob() are: |
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232 | |
233 | =over 4 |
234 | |
235 | =item C<GLOB_ERR> |
236 | |
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237 | Force bsd_glob() to return an error when it encounters a directory it |
238 | cannot open or read. Ordinarily bsd_glob() continues to find matches. |
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239 | |
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240 | =item C<GLOB_LIMIT> |
241 | |
242 | Make bsd_glob() return an error (GLOB_NOSPACE) when the pattern expands |
243 | to a size bigger than the system constant C<ARG_MAX> (usually found in |
244 | limits.h). If your system does not define this constant, bsd_glob() uses |
245 | C<sysconf(_SC_ARG_MAX)> or C<_POSIX_ARG_MAX> where available (in that |
246 | order). You can inspect these values using the standard C<POSIX> |
247 | extension. |
248 | |
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249 | =item C<GLOB_MARK> |
250 | |
251 | Each pathname that is a directory that matches the pattern has a slash |
252 | appended. |
253 | |
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254 | =item C<GLOB_NOCASE> |
255 | |
256 | By default, file names are assumed to be case sensitive; this flag |
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257 | makes bsd_glob() treat case differences as not significant. |
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258 | |
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259 | =item C<GLOB_NOCHECK> |
260 | |
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261 | If the pattern does not match any pathname, then bsd_glob() returns a list |
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262 | consisting of only the pattern. If C<GLOB_QUOTE> is set, its effect |
263 | is present in the pattern returned. |
264 | |
265 | =item C<GLOB_NOSORT> |
266 | |
267 | By default, the pathnames are sorted in ascending ASCII order; this |
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268 | flag prevents that sorting (speeding up bsd_glob()). |
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269 | |
270 | =back |
271 | |
272 | The FreeBSD extensions to the POSIX standard are the following flags: |
273 | |
274 | =over 4 |
275 | |
276 | =item C<GLOB_BRACE> |
277 | |
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278 | Pre-process the string to expand C<{pat,pat,...}> strings like csh(1). |
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279 | The pattern '{}' is left unexpanded for historical reasons (and csh(1) |
280 | does the same thing to ease typing of find(1) patterns). |
281 | |
282 | =item C<GLOB_NOMAGIC> |
283 | |
284 | Same as C<GLOB_NOCHECK> but it only returns the pattern if it does not |
285 | contain any of the special characters "*", "?" or "[". C<NOMAGIC> is |
286 | provided to simplify implementing the historic csh(1) globbing |
287 | behaviour and should probably not be used anywhere else. |
288 | |
289 | =item C<GLOB_QUOTE> |
290 | |
291 | Use the backslash ('\') character for quoting: every occurrence of a |
292 | backslash followed by a character in the pattern is replaced by that |
293 | character, avoiding any special interpretation of the character. |
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294 | (But see below for exceptions on DOSISH systems). |
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295 | |
296 | =item C<GLOB_TILDE> |
297 | |
298 | Expand patterns that start with '~' to user name home directories. |
299 | |
300 | =item C<GLOB_CSH> |
301 | |
302 | For convenience, C<GLOB_CSH> is a synonym for |
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303 | C<GLOB_BRACE | GLOB_NOMAGIC | GLOB_QUOTE | GLOB_TILDE | GLOB_ALPHASORT>. |
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304 | |
305 | =back |
306 | |
307 | The POSIX provided C<GLOB_APPEND>, C<GLOB_DOOFFS>, and the FreeBSD |
308 | extensions C<GLOB_ALTDIRFUNC>, and C<GLOB_MAGCHAR> flags have not been |
309 | implemented in the Perl version because they involve more complex |
310 | interaction with the underlying C structures. |
311 | |
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312 | The following flag has been added in the Perl implementation for |
313 | csh compatibility: |
314 | |
315 | =over 4 |
316 | |
317 | =item C<GLOB_ALPHASORT> |
318 | |
319 | If C<GLOB_NOSORT> is not in effect, sort filenames is alphabetical |
320 | order (case does not matter) rather than in ASCII order. |
321 | |
322 | =back |
323 | |
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324 | =head1 DIAGNOSTICS |
325 | |
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326 | bsd_glob() returns a list of matching paths, possibly zero length. If an |
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327 | error occurred, &File::Glob::GLOB_ERROR will be non-zero and C<$!> will be |
328 | set. &File::Glob::GLOB_ERROR is guaranteed to be zero if no error occurred, |
329 | or one of the following values otherwise: |
330 | |
331 | =over 4 |
332 | |
333 | =item C<GLOB_NOSPACE> |
334 | |
335 | An attempt to allocate memory failed. |
336 | |
337 | =item C<GLOB_ABEND> |
338 | |
339 | The glob was stopped because an error was encountered. |
340 | |
341 | =back |
342 | |
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343 | In the case where bsd_glob() has found some matching paths, but is |
344 | interrupted by an error, it will return a list of filenames B<and> |
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345 | set &File::Glob::ERROR. |
346 | |
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347 | Note that bsd_glob() deviates from POSIX and FreeBSD glob(3) behaviour |
348 | by not considering C<ENOENT> and C<ENOTDIR> as errors - bsd_glob() will |
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349 | continue processing despite those errors, unless the C<GLOB_ERR> flag is |
350 | set. |
351 | |
352 | Be aware that all filenames returned from File::Glob are tainted. |
353 | |
354 | =head1 NOTES |
355 | |
356 | =over 4 |
357 | |
358 | =item * |
359 | |
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360 | If you want to use multiple patterns, e.g. C<bsd_glob "a* b*">, you should |
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361 | probably throw them in a set as in C<bsd_glob "{a*,b*}">. This is because |
362 | the argument to bsd_glob() isn't subjected to parsing by the C shell. |
363 | Remember that you can use a backslash to escape things. |
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364 | |
365 | =item * |
366 | |
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367 | On DOSISH systems, backslash is a valid directory separator character. |
368 | In this case, use of backslash as a quoting character (via GLOB_QUOTE) |
369 | interferes with the use of backslash as a directory separator. The |
370 | best (simplest, most portable) solution is to use forward slashes for |
371 | directory separators, and backslashes for quoting. However, this does |
372 | not match "normal practice" on these systems. As a concession to user |
373 | expectation, therefore, backslashes (under GLOB_QUOTE) only quote the |
374 | glob metacharacters '[', ']', '{', '}', '-', '~', and backslash itself. |
375 | All other backslashes are passed through unchanged. |
376 | |
377 | =item * |
378 | |
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379 | Win32 users should use the real slash. If you really want to use |
380 | backslashes, consider using Sarathy's File::DosGlob, which comes with |
381 | the standard Perl distribution. |
382 | |
7369a524 |
383 | =item * |
384 | |
385 | Mac OS (Classic) users should note a few differences. Since |
386 | Mac OS is not Unix, when the glob code encounters a tilde glob (e.g. |
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387 | ~user) and the C<GLOB_TILDE> flag is used, it simply returns that |
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388 | pattern without doing any expansion. |
389 | |
390 | Glob on Mac OS is case-insensitive by default (if you don't use any |
391 | flags). If you specify any flags at all and still want glob |
392 | to be case-insensitive, you must include C<GLOB_NOCASE> in the flags. |
393 | |
394 | The path separator is ':' (aka colon), not '/' (aka slash). Mac OS users |
395 | should be careful about specifying relative pathnames. While a full path |
396 | always begins with a volume name, a relative pathname should always |
397 | begin with a ':'. If specifying a volume name only, a trailing ':' is |
398 | required. |
399 | |
be708cc0 |
400 | The specification of pathnames in glob patterns adheres to the usual Mac |
401 | OS conventions: The path separator is a colon ':', not a slash '/'. A |
402 | full path always begins with a volume name. A relative pathname on Mac |
403 | OS must always begin with a ':', except when specifying a file or |
404 | directory name in the current working directory, where the leading colon |
405 | is optional. If specifying a volume name only, a trailing ':' is |
406 | required. Due to these rules, a glob like E<lt>*:E<gt> will find all |
407 | mounted volumes, while a glob like E<lt>*E<gt> or E<lt>:*E<gt> will find |
408 | all files and directories in the current directory. |
409 | |
410 | Note that updirs in the glob pattern are resolved before the matching begins, |
411 | i.e. a pattern like "*HD:t?p::a*" will be matched as "*HD:a*". Note also, |
412 | that a single trailing ':' in the pattern is ignored (unless it's a volume |
413 | name pattern like "*HD:"), i.e. a glob like E<lt>:*:E<gt> will find both |
414 | directories I<and> files (and not, as one might expect, only directories). |
415 | You can, however, use the C<GLOB_MARK> flag to distinguish (without a file |
416 | test) directory names from file names. |
417 | |
418 | If the C<GLOB_MARK> flag is set, all directory paths will have a ':' appended. |
419 | Since a directory like 'lib:' is I<not> a valid I<relative> path on Mac OS, |
420 | both a leading and a trailing colon will be added, when the directory name in |
421 | question doesn't contain any colons (e.g. 'lib' becomes ':lib:'). |
422 | |
a45bd81d |
423 | =back |
424 | |
72b16652 |
425 | =head1 AUTHOR |
426 | |
0e950d83 |
427 | The Perl interface was written by Nathan Torkington E<lt>gnat@frii.comE<gt>, |
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428 | and is released under the artistic license. Further modifications were |
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429 | made by Greg Bacon E<lt>gbacon@cs.uah.eduE<gt>, Gurusamy Sarathy |
430 | E<lt>gsar@activestate.comE<gt>, and Thomas Wegner |
431 | E<lt>wegner_thomas@yahoo.comE<gt>. The C glob code has the |
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432 | following copyright: |
433 | |
0e950d83 |
434 | Copyright (c) 1989, 1993 The Regents of the University of California. |
435 | All rights reserved. |
3cb6de81 |
436 | |
0e950d83 |
437 | This code is derived from software contributed to Berkeley by |
438 | Guido van Rossum. |
439 | |
440 | Redistribution and use in source and binary forms, with or without |
441 | modification, are permitted provided that the following conditions |
442 | are met: |
443 | |
444 | 1. Redistributions of source code must retain the above copyright |
445 | notice, this list of conditions and the following disclaimer. |
446 | 2. Redistributions in binary form must reproduce the above copyright |
447 | notice, this list of conditions and the following disclaimer in the |
448 | documentation and/or other materials provided with the distribution. |
449 | 3. Neither the name of the University nor the names of its contributors |
450 | may be used to endorse or promote products derived from this software |
451 | without specific prior written permission. |
452 | |
453 | THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND |
454 | ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
455 | IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
456 | ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE |
457 | FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
458 | DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS |
459 | OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) |
460 | HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
461 | LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
462 | OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF |
463 | SUCH DAMAGE. |
72b16652 |
464 | |
465 | =cut |