This file is indexed.

/usr/lib/perl/5.18.2/re.pm is in perl-base 5.18.2-2ubuntu1.7.

This file is owned by root:root, with mode 0o644.

The actual contents of the file can be viewed below.

  1
  2
  3
  4
  5
  6
  7
  8
  9
 10
 11
 12
 13
 14
 15
 16
 17
 18
 19
 20
 21
 22
 23
 24
 25
 26
 27
 28
 29
 30
 31
 32
 33
 34
 35
 36
 37
 38
 39
 40
 41
 42
 43
 44
 45
 46
 47
 48
 49
 50
 51
 52
 53
 54
 55
 56
 57
 58
 59
 60
 61
 62
 63
 64
 65
 66
 67
 68
 69
 70
 71
 72
 73
 74
 75
 76
 77
 78
 79
 80
 81
 82
 83
 84
 85
 86
 87
 88
 89
 90
 91
 92
 93
 94
 95
 96
 97
 98
 99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
package re;

# pragma for controlling the regexp engine
use strict;
use warnings;

our $VERSION     = "0.23";
our @ISA         = qw(Exporter);
our @EXPORT_OK   = ('regmust',
                    qw(is_regexp regexp_pattern
                       regname regnames regnames_count));
our %EXPORT_OK = map { $_ => 1 } @EXPORT_OK;

my %bitmask = (
    taint   => 0x00100000, # HINT_RE_TAINT
    eval    => 0x00200000, # HINT_RE_EVAL
);

my $flags_hint = 0x02000000; # HINT_RE_FLAGS
my $PMMOD_SHIFT = 0;
my %reflags = (
    m => 1 << ($PMMOD_SHIFT + 0),
    s => 1 << ($PMMOD_SHIFT + 1),
    i => 1 << ($PMMOD_SHIFT + 2),
    x => 1 << ($PMMOD_SHIFT + 3),
    p => 1 << ($PMMOD_SHIFT + 4),
# special cases:
    d => 0,
    l => 1,
    u => 2,
    a => 3,
    aa => 4,
);

sub setcolor {
 eval {				# Ignore errors
  require Term::Cap;

  my $terminal = Tgetent Term::Cap ({OSPEED => 9600}); # Avoid warning.
  my $props = $ENV{PERL_RE_TC} || 'md,me,so,se,us,ue';
  my @props = split /,/, $props;
  my $colors = join "\t", map {$terminal->Tputs($_,1)} @props;

  $colors =~ s/\0//g;
  $ENV{PERL_RE_COLORS} = $colors;
 };
 if ($@) {
    $ENV{PERL_RE_COLORS} ||= qq'\t\t> <\t> <\t\t';
 }

}

my %flags = (
    COMPILE         => 0x0000FF,
    PARSE           => 0x000001,
    OPTIMISE        => 0x000002,
    TRIEC           => 0x000004,
    DUMP            => 0x000008,
    FLAGS           => 0x000010,

    EXECUTE         => 0x00FF00,
    INTUIT          => 0x000100,
    MATCH           => 0x000200,
    TRIEE           => 0x000400,

    EXTRA           => 0xFF0000,
    TRIEM           => 0x010000,
    OFFSETS         => 0x020000,
    OFFSETSDBG      => 0x040000,
    STATE           => 0x080000,
    OPTIMISEM       => 0x100000,
    STACK           => 0x280000,
    BUFFERS         => 0x400000,
    GPOS            => 0x800000,
);
$flags{ALL} = -1 & ~($flags{OFFSETS}|$flags{OFFSETSDBG}|$flags{BUFFERS});
$flags{All} = $flags{all} = $flags{DUMP} | $flags{EXECUTE};
$flags{Extra} = $flags{EXECUTE} | $flags{COMPILE} | $flags{GPOS};
$flags{More} = $flags{MORE} = $flags{All} | $flags{TRIEC} | $flags{TRIEM} | $flags{STATE};
$flags{State} = $flags{DUMP} | $flags{EXECUTE} | $flags{STATE};
$flags{TRIE} = $flags{DUMP} | $flags{EXECUTE} | $flags{TRIEC};

if (defined &DynaLoader::boot_DynaLoader) {
    require XSLoader;
    XSLoader::load();
}
# else we're miniperl
# We need to work for miniperl, because the XS toolchain uses Text::Wrap, which
# uses re 'taint'.

sub _load_unload {
    my ($on)= @_;
    if ($on) {
	# We call install() every time, as if we didn't, we wouldn't
	# "see" any changes to the color environment var since
	# the last time it was called.

	# install() returns an integer, which if casted properly
	# in C resolves to a structure containing the regexp
	# hooks. Setting it to a random integer will guarantee
	# segfaults.
	$^H{regcomp} = install();
    } else {
        delete $^H{regcomp};
    }
}

sub bits {
    my $on = shift;
    my $bits = 0;
   ARG:
    foreach my $idx (0..$#_){
        my $s=$_[$idx];
        if ($s eq 'Debug' or $s eq 'Debugcolor') {
            setcolor() if $s =~/color/i;
            ${^RE_DEBUG_FLAGS} = 0 unless defined ${^RE_DEBUG_FLAGS};
            for my $idx ($idx+1..$#_) {
                if ($flags{$_[$idx]}) {
                    if ($on) {
                        ${^RE_DEBUG_FLAGS} |= $flags{$_[$idx]};
                    } else {
                        ${^RE_DEBUG_FLAGS} &= ~ $flags{$_[$idx]};
                    }
                } else {
                    require Carp;
                    Carp::carp("Unknown \"re\" Debug flag '$_[$idx]', possible flags: ",
                               join(", ",sort keys %flags ) );
                }
            }
            _load_unload($on ? 1 : ${^RE_DEBUG_FLAGS});
            last;
        } elsif ($s eq 'debug' or $s eq 'debugcolor') {
	    setcolor() if $s =~/color/i;
	    _load_unload($on);
	    last;
        } elsif (exists $bitmask{$s}) {
	    $bits |= $bitmask{$s};
	} elsif ($EXPORT_OK{$s}) {
	    require Exporter;
	    re->export_to_level(2, 're', $s);
	} elsif ($s =~ s/^\///) {
	    my $reflags = $^H{reflags} || 0;
	    my $seen_charset;
	    while ($s =~ m/( . )/gx) {
                local $_ = $1;
		if (/[adul]/) {
                    # The 'a' may be repeated; hide this from the rest of the
                    # code by counting and getting rid of all of them, then
                    # changing to 'aa' if there is a repeat.
                    if ($_ eq 'a') {
                        my $sav_pos = pos $s;
                        my $a_count = $s =~ s/a//g;
                        pos $s = $sav_pos - 1;  # -1 because got rid of the 'a'
                        if ($a_count > 2) {
			    require Carp;
                            Carp::carp(
                            qq 'The "a" flag may only appear a maximum of twice'
                            );
                        }
                        elsif ($a_count == 2) {
                            $_ = 'aa';
                        }
                    }
		    if ($on) {
			if ($seen_charset) {
			    require Carp;
                            if ($seen_charset ne $_) {
                                Carp::carp(
                                qq 'The "$seen_charset" and "$_" flags '
                                .qq 'are exclusive'
                                );
                            }
                            else {
                                Carp::carp(
                                qq 'The "$seen_charset" flag may not appear '
                                .qq 'twice'
                                );
                            }
			}
			$^H{reflags_charset} = $reflags{$_};
			$seen_charset = $_;
		    }
		    else {
			delete $^H{reflags_charset}
			 if  defined $^H{reflags_charset}
			  && $^H{reflags_charset} == $reflags{$_};
		    }
		} elsif (exists $reflags{$_}) {
		    $on
		      ? $reflags |= $reflags{$_}
		      : ($reflags &= ~$reflags{$_});
		} else {
		    require Carp;
		    Carp::carp(
		     qq'Unknown regular expression flag "$_"'
		    );
		    next ARG;
		}
	    }
	    ($^H{reflags} = $reflags or defined $^H{reflags_charset})
	     ? $^H |= $flags_hint
	     : ($^H &= ~$flags_hint);
	} else {
	    require Carp;
	    Carp::carp("Unknown \"re\" subpragma '$s' (known ones are: ",
                       join(', ', map {qq('$_')} 'debug', 'debugcolor', sort keys %bitmask),
                       ")");
	}
    }
    $bits;
}

sub import {
    shift;
    $^H |= bits(1, @_);
}

sub unimport {
    shift;
    $^H &= ~ bits(0, @_);
}

1;

__END__