/usr/share/perl5/Net/SFTP/Foreign/Helpers.pm is in libnet-sftp-foreign-perl 1.77+dfsg-1.
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 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 | package Net::SFTP::Foreign::Helpers;
our $VERSION = '1.74_06';
use strict;
use warnings;
use Carp qw(croak carp);
our @CARP_NOT = qw(Net::SFTP::Foreign);
use Scalar::Util qw(tainted);
require Exporter;
our @ISA = qw(Exporter);
our @EXPORT = qw( _sort_entries
_gen_wanted
_ensure_list
_catch_tainted_args
_debug
_gen_converter
_hexdump
$debug
);
our @EXPORT_OK = qw( _is_lnk
_is_dir
_is_reg
_do_nothing
_glob_to_regex
_file_part
_umask_save_and_set
_tcroak );
our $debug;
BEGIN {
eval "use Time::HiRes 'time'"
if ($debug and $debug & 256)
}
sub _debug {
local ($\, $!);
my $caller = '';
if ( $debug & 8192) {
$caller = (caller 1)[3];
$caller =~ s/[\w:]*:://;
$caller .= ': ';
}
if ($debug & 256) {
my $ts = sprintf("%010.5f", time);
print STDERR "#$$ $ts $caller", @_,"\n"
}
else {
print STDERR "# $caller", @_,"\n"
}
}
sub _hexdump {
local ($\, $!);
no warnings qw(uninitialized);
my $data = shift;
while ($data =~ /(.{1,32})/smg) {
my $line=$1;
my @c= (( map { sprintf "%02x",$_ } unpack('C*', $line)),
((" ") x 32))[0..31];
$line=~s/(.)/ my $c=$1; unpack("c",$c)>=32 ? $c : '.' /egms;
local $\;
print STDERR join(" ", @c, '|', $line), "\n";
}
}
sub _do_nothing {}
{
my $has_sk;
sub _has_sk {
unless (defined $has_sk) {
local $@;
local $SIG{__DIE__};
eval { require Sort::Key };
$has_sk = ($@ eq '');
}
return $has_sk;
}
}
sub _sort_entries {
my $e = shift;
if (_has_sk) {
&Sort::Key::keysort_inplace(sub { $_->{filename} }, $e);
}
else {
@$e = sort { $a->{filename} cmp $b->{filename} } @$e;
}
}
sub _gen_wanted {
my ($ow, $onw) = my ($w, $nw) = @_;
if (ref $w eq 'Regexp') {
$w = sub { $_[1]->{filename} =~ $ow }
}
if (ref $nw eq 'Regexp') {
$nw = sub { $_[1]->{filename} !~ $onw }
}
elsif (defined $nw) {
$nw = sub { !&$onw };
}
if (defined $w and defined $nw) {
return sub { &$nw and &$w }
}
return $w || $nw;
}
sub _ensure_list {
my $l = shift;
return () unless defined $l;
local $@;
local $SIG{__DIE__};
local $SIG{__WARN__};
no warnings;
(eval { @$l; 1 } ? @$l : $l);
}
sub _glob_to_regex {
my ($glob, $strict_leading_dot, $ignore_case) = @_;
my ($regex, $in_curlies, $escaping);
my $wildcards = 0;
my $first_byte = 1;
while ($glob =~ /\G(.)/g) {
my $char = $1;
# print "char: $char\n";
if ($char eq '\\') {
$escaping = 1;
}
else {
if ($first_byte) {
if ($strict_leading_dot) {
$regex .= '(?=[^\.])' unless $char eq '.';
}
$first_byte = 0;
}
if ($char eq '/') {
$first_byte = 1;
}
if ($escaping) {
$regex .= quotemeta $char;
}
else {
$wildcards++;
if ($char eq '*') {
$regex .= ".*";
}
elsif ($char eq '?') {
$regex .= '.'
}
elsif ($char eq '{') {
$regex .= '(?:(?:';
++$in_curlies;
}
elsif ($char eq '}') {
$regex .= "))";
--$in_curlies;
$in_curlies < 0
and croak "invalid glob pattern";
}
elsif ($char eq ',' && $in_curlies) {
$regex .= ")|(?:";
}
elsif ($char eq '[') {
if ($glob =~ /\G((?:\\.|[^\]])+)\]/g) {
$regex .= "[$1]"
}
else {
croak "invalid glob pattern";
}
}
else {
$wildcards--;
$regex .= quotemeta $char;
}
}
$escaping = 0;
}
}
croak "invalid glob pattern" if $in_curlies;
my $re = $ignore_case ? qr/^$regex$/i : qr/^$regex$/;
wantarray ? ($re, ($wildcards > 0 ? 1 : undef)) : $re
}
sub _tcroak {
if (${^TAINT} > 0) {
push @_, " while running with -T switch";
goto &croak;
}
if (${^TAINT} < 0) {
push @_, " while running with -t switch";
goto &carp;
}
}
sub _catch_tainted_args {
my $i;
for (@_) {
next unless $i++;
if (tainted($_)) {
my (undef, undef, undef, $subn) = caller 1;
my $msg = ( $subn =~ /::([a-z]\w*)$/
? "Insecure argument '$_' on '$1' method call"
: "Insecure argument '$_' on method call" );
_tcroak($msg);
}
elsif (ref($_)) {
for (grep tainted($_),
do { local ($@, $SIG{__DIE__}); eval { values %$_ }}) {
my (undef, undef, undef, $subn) = caller 1;
my $msg = ( $subn =~ /::([a-z]\w*)$/
? "Insecure argument on '$1' method call"
: "Insecure argument on method call" );
_tcroak($msg);
}
}
}
}
sub _gen_dos2unix {
my $unix2dos = shift;
my $name = ($unix2dos ? 'unix2dos' : 'dos2unix');
my $previous;
my $done;
sub {
$done and die "Internal error: bad calling sequence for $name transformation";
my $adjustment = 0;
for (@_) {
if ($debug and $debug & 128) {
_debug ("before $name: previous: $previous, data follows...");
_hexdump($_);
}
if (length) {
if ($previous) {
$adjustment++;
$_ = "\x0d$_";
}
$adjustment -= $previous = s/\x0d\z//s;
if ($unix2dos) {
$adjustment += s/(?<!\x0d)\x0a/\x0d\x0a/gs;
}
else {
$adjustment -= s/\x0d\x0a/\x0a/gs;
}
}
elsif ($previous) {
$previous = 0;
$done = 1;
$adjustment++;
$_ = "\x0d";
}
if ($debug and $debug & 128) {
_debug ("after $name: previous: $previous, adjustment: $adjustment, data follows...");
_hexdump($_);
}
return $adjustment;
}
}
}
sub _gen_converter {
my $conversion = shift;
return undef unless defined $conversion;
if (ref $conversion) {
if (ref $conversion eq 'CODE') {
return sub {
my $before = length $_[0];
$conversion->($_[0]);
length($_[0]) - $before;
}
}
else {
croak "unsupported conversion argument"
}
}
elsif ($conversion eq 'dos2unix') {
return _gen_dos2unix(0);
}
elsif ($conversion eq 'unix2dos') {
return _gen_dos2unix(1);
}
else {
croak "unknown conversion '$conversion'";
}
}
sub _is_lnk { (0120000 & shift) == 0120000 }
sub _is_dir { (0040000 & shift) == 0040000 }
sub _is_reg { (0100000 & shift) == 0100000 }
sub _file_part {
my $path = shift;
$path =~ m{([^/]*)$} or croak "unable to get file part from path '$path'";
$1;
}
sub _umask_save_and_set {
my $umask = shift;
if (defined $umask) {
my $old = umask $umask;
return bless \$old, 'Net::SFTP::Foreign::Helpers::umask_saver';
}
()
}
sub Net::SFTP::Foreign::Helpers::umask_saver::DESTROY { umask ${$_[0]} }
1;
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