[perl5.git] / ext / File / Glob / Glob.pm

package File::Glob;

use strict;
use Carp;
our($VERSION, @ISA, @EXPORT_OK, @EXPORT_FAIL, %EXPORT_TAGS,
    $AUTOLOAD, $DEFAULT_FLAGS);

require Exporter;
use XSLoader ();
require AutoLoader;

@ISA = qw(Exporter AutoLoader);

@EXPORT_OK   = qw(
    csh_glob
    glob
    GLOB_ABEND
    GLOB_ALTDIRFUNC
    GLOB_BRACE
    GLOB_CSH
    GLOB_ERR
    GLOB_ERROR
    GLOB_MARK
    GLOB_NOCASE
    GLOB_NOCHECK
    GLOB_NOMAGIC
    GLOB_NOSORT
    GLOB_NOSPACE
    GLOB_QUOTE
    GLOB_TILDE
);

%EXPORT_TAGS = (
    'glob' => [ qw(
        GLOB_ABEND
        GLOB_ALTDIRFUNC
        GLOB_BRACE
        GLOB_CSH
        GLOB_ERR
        GLOB_ERROR
        GLOB_MARK
        GLOB_NOCASE
        GLOB_NOCHECK
        GLOB_NOMAGIC
        GLOB_NOSORT
        GLOB_NOSPACE
        GLOB_QUOTE
        GLOB_TILDE
        glob
    ) ],
);

$VERSION = '0.991';

sub import {
    my $i = 1;
    while ($i < @_) {
	if ($_[$i] =~ /^:(case|nocase|globally)$/) {
	    splice(@_, $i, 1);
	    $DEFAULT_FLAGS &= ~GLOB_NOCASE() if $1 eq 'case';
	    $DEFAULT_FLAGS |= GLOB_NOCASE() if $1 eq 'nocase';
	    if ($1 eq 'globally') {
		local $^W;
		*CORE::GLOBAL::glob = \&File::Glob::csh_glob;
	    }
	    next;
	}
	++$i;
    }
    goto &Exporter::import;
}

sub AUTOLOAD {
    # This AUTOLOAD is used to 'autoload' constants from the constant()
    # XS function.  If a constant is not found then control is passed
    # to the AUTOLOAD in AutoLoader.

    my $constname;
    ($constname = $AUTOLOAD) =~ s/.*:://;
    my $val = constant($constname, @_ ? $_[0] : 0);
    if ($! != 0) {
	if ($! =~ /Invalid/) {
	    $AutoLoader::AUTOLOAD = $AUTOLOAD;
	    goto &AutoLoader::AUTOLOAD;
	}
	else {
		croak "Your vendor has not defined File::Glob macro $constname";
	}
    }
    eval "sub $AUTOLOAD { $val }";
    goto &$AUTOLOAD;
}

XSLoader::load 'File::Glob', $VERSION;

# Preloaded methods go here.

sub GLOB_ERROR {
    return constant('GLOB_ERROR', 0);
}

sub GLOB_CSH () { GLOB_BRACE() | GLOB_NOMAGIC() | GLOB_QUOTE() | GLOB_TILDE() }

$DEFAULT_FLAGS = GLOB_CSH();
if ($^O =~ /^(?:MSWin32|VMS|os2|dos|riscos|MacOS)$/) {
    $DEFAULT_FLAGS |= GLOB_NOCASE();
}

# Autoload methods go after =cut, and are processed by the autosplit program.

sub glob {
    my ($pat,$flags) = @_;
    $flags = $DEFAULT_FLAGS if @_ < 2;
    return doglob($pat,$flags);
}

## borrowed heavily from gsar's File::DosGlob
my %iter;
my %entries;

sub csh_glob {
    my $pat = shift;
    my $cxix = shift;
    my @pat;

    # glob without args defaults to $_
    $pat = $_ unless defined $pat;

    # extract patterns
    if ($pat =~ /\s/) {
        # XXX this is needed for compatibility with the csh
	# implementation in Perl.  Need to support a flag
	# to disable this behavior.
	require Text::ParseWords;
	@pat = Text::ParseWords::parse_line('\s+',0,$pat);
    }

    # assume global context if not provided one
    $cxix = '_G_' unless defined $cxix;
    $iter{$cxix} = 0 unless exists $iter{$cxix};

    # if we're just beginning, do it all first
    if ($iter{$cxix} == 0) {
	if (@pat) {
	    $entries{$cxix} = [ map { doglob($_, $DEFAULT_FLAGS) } @pat ];
	}
	else {
	    $entries{$cxix} = [ doglob($pat, $DEFAULT_FLAGS) ];
	}
    }

    # chuck it all out, quick or slow
    if (wantarray) {
        delete $iter{$cxix};
        return @{delete $entries{$cxix}};
    }
    else {
        if ($iter{$cxix} = scalar @{$entries{$cxix}}) {
            return shift @{$entries{$cxix}};
        }
        else {
            # return undef for EOL
            delete $iter{$cxix};
            delete $entries{$cxix};
            return undef;
        }
    }
}

1;
__END__

=head1 NAME

File::Glob - Perl extension for BSD glob routine

=head1 SYNOPSIS

  use File::Glob ':glob';
  @list = glob('*.[ch]');
  $homedir = glob('~gnat', GLOB_TILDE | GLOB_ERR);
  if (GLOB_ERROR) {
    # an error occurred reading $homedir
  }

  ## override the core glob (core glob() does this automatically
  ## by default anyway, since v5.6.0)
  use File::Glob ':globally';
  my @sources = <*.{c,h,y}>

  ## override the core glob, forcing case sensitivity
  use File::Glob qw(:globally :case);
  my @sources = <*.{c,h,y}>

  ## override the core glob forcing case insensitivity
  use File::Glob qw(:globally :nocase);
  my @sources = <*.{c,h,y}>

=head1 DESCRIPTION

File::Glob implements the FreeBSD glob(3) routine, which is a superset
of the POSIX glob() (described in IEEE Std 1003.2 "POSIX.2").  The
glob() routine takes a mandatory C<pattern> argument, and an optional
C<flags> argument, and returns a list of filenames matching the
pattern, with interpretation of the pattern modified by the C<flags>
variable.  The POSIX defined flags are:

=over 4

=item C<GLOB_ERR>

Force glob() to return an error when it encounters a directory it
cannot open or read.  Ordinarily glob() continues to find matches.

=item C<GLOB_MARK>

Each pathname that is a directory that matches the pattern has a slash
appended.

=item C<GLOB_NOCASE>

By default, file names are assumed to be case sensitive; this flag
makes glob() treat case differences as not significant.

=item C<GLOB_NOCHECK>

If the pattern does not match any pathname, then glob() returns a list
consisting of only the pattern.  If C<GLOB_QUOTE> is set, its effect
is present in the pattern returned.

=item C<GLOB_NOSORT>

By default, the pathnames are sorted in ascending ASCII order; this
flag prevents that sorting (speeding up glob()).

=back

The FreeBSD extensions to the POSIX standard are the following flags:

=over 4

=item C<GLOB_BRACE>

Pre-process the string to expand C<{pat,pat,...}> strings like csh(1).
The pattern '{}' is left unexpanded for historical reasons (and csh(1)
does the same thing to ease typing of find(1) patterns).

=item C<GLOB_NOMAGIC>

Same as C<GLOB_NOCHECK> but it only returns the pattern if it does not
contain any of the special characters "*", "?" or "[".  C<NOMAGIC> is
provided to simplify implementing the historic csh(1) globbing
behaviour and should probably not be used anywhere else.

=item C<GLOB_QUOTE>

Use the backslash ('\') character for quoting: every occurrence of a
backslash followed by a character in the pattern is replaced by that
character, avoiding any special interpretation of the character.
(But see below for exceptions on DOSISH systems).

=item C<GLOB_TILDE>

Expand patterns that start with '~' to user name home directories.

=item C<GLOB_CSH>

For convenience, C<GLOB_CSH> is a synonym for
C<GLOB_BRACE | GLOB_NOMAGIC | GLOB_QUOTE | GLOB_TILDE>.

=back

The POSIX provided C<GLOB_APPEND>, C<GLOB_DOOFFS>, and the FreeBSD
extensions C<GLOB_ALTDIRFUNC>, and C<GLOB_MAGCHAR> flags have not been
implemented in the Perl version because they involve more complex
interaction with the underlying C structures.

=head1 DIAGNOSTICS

glob() returns a list of matching paths, possibly zero length.  If an
error occurred, &File::Glob::GLOB_ERROR will be non-zero and C<$!> will be
set.  &File::Glob::GLOB_ERROR is guaranteed to be zero if no error occurred,
or one of the following values otherwise:

=over 4

=item C<GLOB_NOSPACE>

An attempt to allocate memory failed.

=item C<GLOB_ABEND>

The glob was stopped because an error was encountered.

=back

In the case where glob() has found some matching paths, but is
interrupted by an error, glob() will return a list of filenames B<and>
set &File::Glob::ERROR.

Note that glob() deviates from POSIX and FreeBSD glob(3) behaviour by
not considering C<ENOENT> and C<ENOTDIR> as errors - glob() will
continue processing despite those errors, unless the C<GLOB_ERR> flag is
set.

Be aware that all filenames returned from File::Glob are tainted.

=head1 NOTES

=over 4

=item *

If you want to use multiple patterns, e.g. C<glob "a* b*">, you should
probably throw them in a set as in C<glob "{a*,b*}>.  This is because
the argument to glob isn't subjected to parsing by the C shell.  Remember
that you can use a backslash to escape things.

=item *

On DOSISH systems, backslash is a valid directory separator character.
In this case, use of backslash as a quoting character (via GLOB_QUOTE)
interferes with the use of backslash as a directory separator. The
best (simplest, most portable) solution is to use forward slashes for
directory separators, and backslashes for quoting. However, this does
not match "normal practice" on these systems. As a concession to user
expectation, therefore, backslashes (under GLOB_QUOTE) only quote the
glob metacharacters '[', ']', '{', '}', '-', '~', and backslash itself.
All other backslashes are passed through unchanged.

=item *

Win32 users should use the real slash.  If you really want to use
backslashes, consider using Sarathy's File::DosGlob, which comes with
the standard Perl distribution.

=back

=head1 AUTHOR

The Perl interface was written by Nathan Torkington E<lt>gnat@frii.comE<gt>,
and is released under the artistic license.  Further modifications were
made by Greg Bacon E<lt>gbacon@cs.uah.eduE<gt> and Gurusamy Sarathy
E<lt>gsar@activestate.comE<gt>.  The C glob code has the
following copyright:

    Copyright (c) 1989, 1993 The Regents of the University of California.
    All rights reserved.

    This code is derived from software contributed to Berkeley by
    Guido van Rossum.

    Redistribution and use in source and binary forms, with or without
    modification, are permitted provided that the following conditions
    are met:

    1. Redistributions of source code must retain the above copyright
       notice, this list of conditions and the following disclaimer.
    2. Redistributions in binary form must reproduce the above copyright
       notice, this list of conditions and the following disclaimer in the
       documentation and/or other materials provided with the distribution.
    3. Neither the name of the University nor the names of its contributors
       may be used to endorse or promote products derived from this software
       without specific prior written permission.

    THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
    ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
    IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
    ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
    FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
    DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
    OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
    HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
    LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
    OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
    SUCH DAMAGE.

=cut
Commit	Line	Data
72b16652 GS	1	package File::Glob;
	2
	3	use strict;
	4	use Carp;
17f410f9 GS	5	our($VERSION, @ISA, @EXPORT_OK, @EXPORT_FAIL, %EXPORT_TAGS,
17f410f9 GS	6	$AUTOLOAD, $DEFAULT_FLAGS);
72b16652 GS	7
72b16652 GS	8	require Exporter;
9426adcd	9	use XSLoader ();
72b16652 GS	10	require AutoLoader;
72b16652 GS	11
9426adcd	12	@ISA = qw(Exporter AutoLoader);
72b16652 GS	13
72b16652 GS	14	@EXPORT_OK = qw(
72b16652 GS	15	csh_glob
	16	glob
	17	GLOB_ABEND
	18	GLOB_ALTDIRFUNC
	19	GLOB_BRACE
220398a0	20	GLOB_CSH
72b16652 GS	21	GLOB_ERR
	22	GLOB_ERROR
	23	GLOB_MARK
220398a0	24	GLOB_NOCASE
72b16652 GS	25	GLOB_NOCHECK
	26	GLOB_NOMAGIC
	27	GLOB_NOSORT
	28	GLOB_NOSPACE
	29	GLOB_QUOTE
	30	GLOB_TILDE
	31	);
	32
72b16652 GS	33	%EXPORT_TAGS = (
	34	'glob' => [ qw(
	35	GLOB_ABEND
	36	GLOB_ALTDIRFUNC
	37	GLOB_BRACE
220398a0	38	GLOB_CSH
72b16652 GS	39	GLOB_ERR
	40	GLOB_ERROR
	41	GLOB_MARK
220398a0	42	GLOB_NOCASE
72b16652 GS	43	GLOB_NOCHECK
	44	GLOB_NOMAGIC
	45	GLOB_NOSORT
	46	GLOB_NOSPACE
	47	GLOB_QUOTE
	48	GLOB_TILDE
	49	glob
	50	) ],
	51	);
	52
220398a0 PM	53	$VERSION = '0.991';
	54
	55	sub import {
	56	my $i = 1;
	57	while ($i < @_) {
	58	if ($_[$i] =~ /^:(case\|nocase\|globally)$/) {
	59	splice(@_, $i, 1);
	60	$DEFAULT_FLAGS &= ~GLOB_NOCASE() if $1 eq 'case';
	61	$DEFAULT_FLAGS \|= GLOB_NOCASE() if $1 eq 'nocase';
	62	if ($1 eq 'globally') {
	63	local $^W;
	64	*CORE::GLOBAL::glob = \&File::Glob::csh_glob;
	65	}
	66	next;
	67	}
	68	++$i;
72b16652	69	}
220398a0	70	goto &Exporter::import;
72b16652 GS	71	}
	72
	73	sub AUTOLOAD {
	74	# This AUTOLOAD is used to 'autoload' constants from the constant()
	75	# XS function. If a constant is not found then control is passed
	76	# to the AUTOLOAD in AutoLoader.
	77
	78	my $constname;
	79	($constname = $AUTOLOAD) =~ s/.*:://;
	80	my $val = constant($constname, @_ ? $_[0] : 0);
	81	if ($! != 0) {
	82	if ($! =~ /Invalid/) {
	83	$AutoLoader::AUTOLOAD = $AUTOLOAD;
	84	goto &AutoLoader::AUTOLOAD;
	85	}
	86	else {
	87	croak "Your vendor has not defined File::Glob macro $constname";
	88	}
	89	}
	90	eval "sub $AUTOLOAD { $val }";
	91	goto &$AUTOLOAD;
	92	}
	93
9426adcd	94	XSLoader::load 'File::Glob', $VERSION;
72b16652 GS	95
	96	# Preloaded methods go here.
	97
	98	sub GLOB_ERROR {
	99	return constant('GLOB_ERROR', 0);
	100	}
	101
	102	sub GLOB_CSH () { GLOB_BRACE() \| GLOB_NOMAGIC() \| GLOB_QUOTE() \| GLOB_TILDE() }
	103
220398a0 PM	104	$DEFAULT_FLAGS = GLOB_CSH();
	105	if ($^O =~ /^(?:MSWin32\|VMS\|os2\|dos\|riscos\|MacOS)$/) {
	106	$DEFAULT_FLAGS \|= GLOB_NOCASE();
	107	}
	108
72b16652 GS	109	# Autoload methods go after =cut, and are processed by the autosplit program.
	110
	111	sub glob {
f0963acb GS	112	my ($pat,$flags) = @_;
	113	$flags = $DEFAULT_FLAGS if @_ < 2;
	114	return doglob($pat,$flags);
72b16652 GS	115	}
	116
	117	## borrowed heavily from gsar's File::DosGlob
	118	my %iter;
	119	my %entries;
	120
	121	sub csh_glob {
	122	my $pat = shift;
	123	my $cxix = shift;
	124	my @pat;
	125
	126	# glob without args defaults to $_
	127	$pat = $_ unless defined $pat;
	128
	129	# extract patterns
	130	if ($pat =~ /\s/) {
	131	# XXX this is needed for compatibility with the csh
	132	# implementation in Perl. Need to support a flag
	133	# to disable this behavior.
	134	require Text::ParseWords;
	135	@pat = Text::ParseWords::parse_line('\s+',0,$pat);
	136	}
	137
	138	# assume global context if not provided one
	139	$cxix = '_G_' unless defined $cxix;
	140	$iter{$cxix} = 0 unless exists $iter{$cxix};
	141
	142	# if we're just beginning, do it all first
	143	if ($iter{$cxix} == 0) {
	144	if (@pat) {
220398a0	145	$entries{$cxix} = [ map { doglob($_, $DEFAULT_FLAGS) } @pat ];
72b16652 GS	146	}
72b16652 GS	147	else {
220398a0	148	$entries{$cxix} = [ doglob($pat, $DEFAULT_FLAGS) ];
72b16652 GS	149	}
	150	}
	151
	152	# chuck it all out, quick or slow
	153	if (wantarray) {
	154	delete $iter{$cxix};
	155	return @{delete $entries{$cxix}};
	156	}
	157	else {
	158	if ($iter{$cxix} = scalar @{$entries{$cxix}}) {
	159	return shift @{$entries{$cxix}};
	160	}
	161	else {
	162	# return undef for EOL
	163	delete $iter{$cxix};
	164	delete $entries{$cxix};
	165	return undef;
	166	}
	167	}
	168	}
	169
	170	1;
	171	__END__
	172
	173	=head1 NAME
	174
	175	File::Glob - Perl extension for BSD glob routine
	176
	177	=head1 SYNOPSIS
	178
	179	use File::Glob ':glob';
	180	@list = glob('*.[ch]');
	181	$homedir = glob('~gnat', GLOB_TILDE \| GLOB_ERR);
	182	if (GLOB_ERROR) {
	183	# an error occurred reading $homedir
	184	}
	185
11fe14b1 GS	186	## override the core glob (core glob() does this automatically
11fe14b1 GS	187	## by default anyway, since v5.6.0)
220398a0 PM	188	use File::Glob ':globally';
	189	my @sources = <*.{c,h,y}>
	190
	191	## override the core glob, forcing case sensitivity
	192	use File::Glob qw(:globally :case);
	193	my @sources = <*.{c,h,y}>
	194
	195	## override the core glob forcing case insensitivity
	196	use File::Glob qw(:globally :nocase);
72b16652 GS	197	my @sources = <*.{c,h,y}>
	198
	199	=head1 DESCRIPTION
	200
	201	File::Glob implements the FreeBSD glob(3) routine, which is a superset
	202	of the POSIX glob() (described in IEEE Std 1003.2 "POSIX.2"). The
	203	glob() routine takes a mandatory C<pattern> argument, and an optional
	204	C<flags> argument, and returns a list of filenames matching the
	205	pattern, with interpretation of the pattern modified by the C<flags>
	206	variable. The POSIX defined flags are:
	207
	208	=over 4
	209
	210	=item C<GLOB_ERR>
	211
	212	Force glob() to return an error when it encounters a directory it
	213	cannot open or read. Ordinarily glob() continues to find matches.
	214
	215	=item C<GLOB_MARK>
	216
	217	Each pathname that is a directory that matches the pattern has a slash
	218	appended.
	219
220398a0 PM	220	=item C<GLOB_NOCASE>
	221
	222	By default, file names are assumed to be case sensitive; this flag
	223	makes glob() treat case differences as not significant.
	224
72b16652 GS	225	=item C<GLOB_NOCHECK>
	226
	227	If the pattern does not match any pathname, then glob() returns a list
	228	consisting of only the pattern. If C<GLOB_QUOTE> is set, its effect
	229	is present in the pattern returned.
	230
	231	=item C<GLOB_NOSORT>
	232
	233	By default, the pathnames are sorted in ascending ASCII order; this
	234	flag prevents that sorting (speeding up glob()).
	235
	236	=back
	237
	238	The FreeBSD extensions to the POSIX standard are the following flags:
	239
	240	=over 4
	241
	242	=item C<GLOB_BRACE>
	243
a45bd81d	244	Pre-process the string to expand C<{pat,pat,...}> strings like csh(1).
72b16652 GS	245	The pattern '{}' is left unexpanded for historical reasons (and csh(1)
	246	does the same thing to ease typing of find(1) patterns).
	247
	248	=item C<GLOB_NOMAGIC>
	249
	250	Same as C<GLOB_NOCHECK> but it only returns the pattern if it does not
	251	contain any of the special characters "*", "?" or "[". C<NOMAGIC> is
	252	provided to simplify implementing the historic csh(1) globbing
	253	behaviour and should probably not be used anywhere else.
	254
	255	=item C<GLOB_QUOTE>
	256
	257	Use the backslash ('\') character for quoting: every occurrence of a
	258	backslash followed by a character in the pattern is replaced by that
	259	character, avoiding any special interpretation of the character.
220398a0	260	(But see below for exceptions on DOSISH systems).
72b16652 GS	261
	262	=item C<GLOB_TILDE>
	263
	264	Expand patterns that start with '~' to user name home directories.
	265
	266	=item C<GLOB_CSH>
	267
	268	For convenience, C<GLOB_CSH> is a synonym for
	269	C<GLOB_BRACE \| GLOB_NOMAGIC \| GLOB_QUOTE \| GLOB_TILDE>.
	270
	271	=back
	272
	273	The POSIX provided C<GLOB_APPEND>, C<GLOB_DOOFFS>, and the FreeBSD
	274	extensions C<GLOB_ALTDIRFUNC>, and C<GLOB_MAGCHAR> flags have not been
	275	implemented in the Perl version because they involve more complex
	276	interaction with the underlying C structures.
	277
	278	=head1 DIAGNOSTICS
	279
	280	glob() returns a list of matching paths, possibly zero length. If an
	281	error occurred, &File::Glob::GLOB_ERROR will be non-zero and C<$!> will be
	282	set. &File::Glob::GLOB_ERROR is guaranteed to be zero if no error occurred,
	283	or one of the following values otherwise:
	284
	285	=over 4
	286
	287	=item C<GLOB_NOSPACE>
	288
	289	An attempt to allocate memory failed.
	290
	291	=item C<GLOB_ABEND>
	292
	293	The glob was stopped because an error was encountered.
	294
	295	=back
	296
	297	In the case where glob() has found some matching paths, but is
	298	interrupted by an error, glob() will return a list of filenames B<and>
	299	set &File::Glob::ERROR.
	300
	301	Note that glob() deviates from POSIX and FreeBSD glob(3) behaviour by
	302	not considering C<ENOENT> and C<ENOTDIR> as errors - glob() will
	303	continue processing despite those errors, unless the C<GLOB_ERR> flag is
	304	set.
	305
	306	Be aware that all filenames returned from File::Glob are tainted.
	307
	308	=head1 NOTES
	309
	310	=over 4
	311
	312	=item *
	313
	314	If you want to use multiple patterns, e.g. C<glob "a* b*">, you should
	315	probably throw them in a set as in C<glob "{a,b}>. This is because
	316	the argument to glob isn't subjected to parsing by the C shell. Remember
	317	that you can use a backslash to escape things.
	318
	319	=item *
	320
220398a0 PM	321	On DOSISH systems, backslash is a valid directory separator character.
	322	In this case, use of backslash as a quoting character (via GLOB_QUOTE)
	323	interferes with the use of backslash as a directory separator. The
	324	best (simplest, most portable) solution is to use forward slashes for
	325	directory separators, and backslashes for quoting. However, this does
	326	not match "normal practice" on these systems. As a concession to user
	327	expectation, therefore, backslashes (under GLOB_QUOTE) only quote the
	328	glob metacharacters '[', ']', '{', '}', '-', '~', and backslash itself.
	329	All other backslashes are passed through unchanged.
	330
	331	=item *
	332
72b16652 GS	333	Win32 users should use the real slash. If you really want to use
	334	backslashes, consider using Sarathy's File::DosGlob, which comes with
	335	the standard Perl distribution.
	336
a45bd81d GS	337	=back
a45bd81d GS	338
72b16652 GS	339	=head1 AUTHOR
72b16652 GS	340
0e950d83	341	The Perl interface was written by Nathan Torkington E<lt>gnat@frii.comE<gt>,
72b16652 GS	342	and is released under the artistic license. Further modifications were
	343	made by Greg Bacon E<lt>gbacon@cs.uah.eduE<gt> and Gurusamy Sarathy
	344	E<lt>gsar@activestate.comE<gt>. The C glob code has the
	345	following copyright:
	346
0e950d83 GS	347	Copyright (c) 1989, 1993 The Regents of the University of California.
0e950d83 GS	348	All rights reserved.
3cb6de81	349
0e950d83 GS	350	This code is derived from software contributed to Berkeley by
	351	Guido van Rossum.
	352
	353	Redistribution and use in source and binary forms, with or without
	354	modification, are permitted provided that the following conditions
	355	are met:
	356
	357	1. Redistributions of source code must retain the above copyright
	358	notice, this list of conditions and the following disclaimer.
	359	2. Redistributions in binary form must reproduce the above copyright
	360	notice, this list of conditions and the following disclaimer in the
	361	documentation and/or other materials provided with the distribution.
	362	3. Neither the name of the University nor the names of its contributors
	363	may be used to endorse or promote products derived from this software
	364	without specific prior written permission.
	365
	366	THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	367	ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	368	IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	369	ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	370	FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	371	DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	372	OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	373	HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	374	LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	375	OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	376	SUCH DAMAGE.
72b16652 GS	377
72b16652 GS	378	=cut