1 | ###############################################################################
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2 | #
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3 | # LocalFS.pm -- file functions acting upon the local filesystem
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4 | #
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5 | # A component of the Greenstone digital library software from the New Zealand
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6 | # Digital Library Project at the University of Waikato, New Zealand.
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7 | #
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8 | # Copyright (C) 2013 New Zealand Digital Library Project
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9 | #
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10 | # This program is free software; you can redistribute it and/or modify it under
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11 | # the terms of the GNU General Public License as published by the Free Software
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12 | # Foundation; either version 2 of the License, or (at your option) any later
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13 | # version.
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14 | #
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15 | # This program is distributed in the hope that it will be useful, but WITHOUT
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16 | # ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
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17 | # FOR A PARTICULAR PURPOSE. See the GNU General Public License for more
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18 | # details.
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19 | #
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20 | # You should have received a copy of the GNU General Public License along with
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21 | # this program; if not, write to the Free Software Foundation, Inc., 675 Mass
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22 | # Ave, Cambridge, MA 02139, USA.
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23 | #
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24 | ###############################################################################
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25 |
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26 | package FileUtils::LocalFS;
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27 |
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28 | # Pragma
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29 | use strict;
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30 |
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31 |
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32 | # Globals
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33 | my $paths_we_cannot_link_from = {};
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34 |
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35 |
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36 | ## @function canRead()
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37 | #
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38 | sub canRead
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39 | {
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40 | my $path = shift(@_);
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41 | return &fileTest($path, '-R');
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42 | }
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43 | ## canRead()
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44 |
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45 |
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46 | ## @function closeFileHandle
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47 | #
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48 | sub closeFileHandle
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49 | {
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50 | my $fh_ref = shift(@_);
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51 | close($$fh_ref);
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52 | return 1;
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53 | }
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54 | ## closeFileHandle()
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55 |
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56 |
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57 | ## @function filenameConcatenate()
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58 | #
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59 | sub filenameConcatenate
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60 | {
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61 | my $first_file = shift(@_);
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62 | my (@filenames) = @_;
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63 |
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64 | # Useful for debugging
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65 | # -- might make sense to call caller(0) rather than (1)??
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66 | # my ($cpackage,$cfilename,$cline,$csubr,$chas_args,$cwantarray) = caller(1);
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67 | # print STDERR "Calling method: $cfilename:$cline $cpackage->$csubr\n";
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68 |
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69 | # If first_file is not null or empty, then add it back into the list
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70 | if (defined $first_file && $first_file =~ /\S/) {
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71 | unshift(@filenames, $first_file);
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72 | }
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73 |
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74 | my $filename = join("/", @filenames);
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75 |
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76 | # remove duplicate slashes and remove the last slash
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77 | if ($ENV{'GSDLOS'} =~ /^windows$/i) {
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78 | $filename =~ s/[\\\/]+/\\/g;
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79 | } else {
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80 | $filename =~ s/[\/]+/\//g;
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81 | # DB: want a filename abc\de.html to remain like this
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82 | }
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83 | $filename =~ s/[\\\/]$//;
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84 |
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85 | return $filename;
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86 | }
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87 | ## filenameConcatenate()
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88 |
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89 |
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90 | ## @function fileSize()
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91 | #
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92 | sub fileSize
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93 | {
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94 | my ($filename_full_path) = @_;
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95 | return -s $filename_full_path;
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96 | }
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97 | ## fileStatus()
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98 |
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99 |
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100 | ## @function fileTest()
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101 | #
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102 | sub fileTest
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103 | {
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104 | my $filename_full_path = shift(@_);
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105 | # By default tests for existance of file or directory (-e)
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106 | # Can be made more specific by providing second parameter (e.g. -f or -d)
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107 | my $test_op = shift(@_) || '-e';
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108 |
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109 | my $exists = 0;
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110 |
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111 | if ($ENV{'GSDLOS'} =~ m/^windows$/i) {
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112 | require Win32;
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113 | my $filename_short_path = Win32::GetShortPathName($filename_full_path);
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114 | if (!defined $filename_short_path) {
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115 | # Was probably still in UTF8 form (not what is needed on Windows)
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116 | my $unicode_filename_full_path = eval "decode(\"utf8\",\$filename_full_path)";
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117 | if (defined $unicode_filename_full_path) {
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118 | $filename_short_path = Win32::GetShortPathName($unicode_filename_full_path);
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119 | }
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120 | }
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121 | $filename_full_path = $filename_short_path;
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122 | }
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123 |
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124 | if (defined $filename_full_path) {
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125 | $exists = eval "($test_op \$filename_full_path)";
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126 | }
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127 |
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128 | # The eval may result in exists being undefined, but we need to return
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129 | # something
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130 | return ($exists || 0);
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131 | }
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132 | ## fileTest()
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133 |
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134 |
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135 | ## @function isFilenameAbsolute()
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136 | #
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137 | sub isFilenameAbsolute
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138 | {
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139 | my ($filename) = @_;
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140 | if ($ENV{'GSDLOS'} =~ /^windows$/i)
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141 | {
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142 | return ($filename =~ m/^(\w:)?\\/);
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143 | }
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144 | return ($filename =~ m/^\//);
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145 | }
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146 | # isFilenameAbsolute()
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147 |
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148 |
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149 | ## @function isHDFS
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150 | #
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151 | sub isHDFS
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152 | {
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153 | return 0;
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154 | }
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155 | ## isHDFS()
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156 |
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157 |
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158 | ## @function linkFile()
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159 | #
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160 | sub linkFile
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161 | {
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162 | my ($mode, $src, $dest, $ensure_paths_absolute) = @_;
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163 |
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164 | # remove trailing slashes from source and destination files
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165 | $src =~ s/[\\\/]+$//;
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166 | $dest =~ s/[\\\/]+$//;
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167 |
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168 | # Ensure file paths are absolute IF requested to do so
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169 | # Soft_linking didn't work for relative paths
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170 | if($mode eq 'HARD' || (defined $ensure_paths_absolute && $ensure_paths_absolute))
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171 | {
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172 | # We need to ensure that the src file is the absolute path
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173 | # See http://perldoc.perl.org/File/Spec.html
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174 | if(!File::Spec->file_name_is_absolute( $src ))
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175 | {
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176 | # it's relative
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177 | $src = File::Spec->rel2abs($src); # make absolute
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178 | }
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179 | # Might as well ensure that the destination file's absolute path is used
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180 | if(!File::Spec->file_name_is_absolute( $dest ))
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181 | {
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182 | $dest = File::Spec->rel2abs($dest); # make absolute
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183 | }
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184 | }
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185 |
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186 | # a few sanity checks
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187 | if (!-e $src)
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188 | {
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189 | &FileUtils::printError('Source file does not exist: ' . $src);
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190 | return 0;
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191 | }
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192 |
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193 | my $dest_dir = &File::Basename::dirname($dest);
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194 | if (!-e $dest_dir)
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195 | {
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196 | &makeAllDirectories($dest_dir);
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197 | }
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198 |
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199 | my $error_message = ucfirst(lc($mode)) . ' link failed';
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200 | if ($ENV{'GSDLOS'} =~ /^windows$/i)
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201 | {
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202 | # symlink not supported on windows
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203 | $error_message = 'Symlink not supported on windows';
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204 | }
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205 | elsif ($mode eq 'HARD')
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206 | {
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207 | link($src, $dest);
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208 | #if (!eval {link($src, $dest)})
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209 | #{
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210 | # &FileUtils::printWarning('Unable to create hard link: ' . $dest);
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211 | #}
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212 | }
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213 | elsif ($mode eq 'SOFT')
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214 | {
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215 | symlink($src, $dest);
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216 | #if (!eval {symlink($src, $dest)})
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217 | #{
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218 | # &FileUtils::printWarning('Unable to create soft link: ' . $src);
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219 | #}
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220 | }
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221 | else
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222 | {
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223 | $error_message = 'Unknown mode requested: ' . $mode;
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224 | }
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225 | if (!-e $dest)
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226 | {
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227 | # Determine the top source path
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228 | my ($src_root) = $src =~ /^([a-z]:\\|\/[^\/]+)/i;
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229 | # If we haven't warned about this yet, warn now and record that we've
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230 | # warned. I want to let the user know what has happened, but without
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231 | # bombarding them with a thousand warning messages...
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232 | if (!defined $paths_we_cannot_link_from->{$src_root})
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233 | {
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234 | &FileUtils::printWarning($error_message . '. Will attempt to copy from: ' . $src_root);
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235 | $paths_we_cannot_link_from->{$src_root} = 1;
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236 | }
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237 | &File::Copy::copy ($src, $dest);
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238 | }
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239 | return (-e $dest);
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240 | }
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241 | # /** linkFile() **/
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242 |
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243 |
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244 | ## @function makeAllDirectories()
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245 | #
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246 | # in case anyone cares - I did some testing (using perls Benchmark module)
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247 | # on this subroutine against File::Path::mkpath (). mk_all_dir() is apparently
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248 | # slightly faster (surprisingly) - Stefan.
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249 | #
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250 | sub makeAllDirectories
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251 | {
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252 | my ($dir) = @_;
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253 |
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254 | # use / for the directory separator, remove duplicate and
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255 | # trailing slashes
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256 | $dir=~s/[\\\/]+/\//g;
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257 | $dir=~s/[\\\/]+$//;
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258 |
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259 | # make sure the cache directory exists
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260 | my $dirsofar = "";
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261 | my $first = 1;
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262 | foreach my $dirname (split ("/", $dir))
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263 | {
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264 | $dirsofar .= "/" unless $first;
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265 | $first = 0;
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266 |
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267 | $dirsofar .= $dirname;
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268 |
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269 | next if $dirname =~ /^(|[a-z]:)$/i;
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270 | if (!-e $dirsofar)
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271 | {
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272 | my $store_umask = umask(0002);
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273 | my $mkdir_ok = mkdir ($dirsofar, 0777);
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274 | umask($store_umask);
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275 | if (!$mkdir_ok)
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276 | {
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277 | print STDERR "FileUtils::makeAllDirectories() could not create directory $dirsofar\n";
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278 | return;
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279 | }
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280 | }
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281 | }
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282 | return 1;
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283 | }
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284 | ## makeAllDirectories()
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285 |
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286 |
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287 | ## @function makeDirectory()
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288 | #
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289 | sub makeDirectory
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290 | {
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291 | my $dir = shift(@_);
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292 | my $store_umask = umask(0002);
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293 | my $mkdir_ok = mkdir ($dir, 0777);
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294 | umask($store_umask);
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295 | return $mkdir_ok;
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296 | }
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297 | ## makeDirectory()
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298 |
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299 |
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300 | ## @function modificationTime()
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301 | #
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302 | sub modificationTime
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303 | {
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304 | my $path = shift(@_);
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305 | my @file_status = stat($path);
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306 | return $file_status[9];
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307 | }
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308 | ## modificationTime()
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309 |
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310 | ## @function openFileHandle()
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311 | #
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312 | sub openFileHandle
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313 | {
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314 | my $path = shift(@_);
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315 | my $mode = shift(@_);
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316 | my $fh_ref = shift(@_);
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317 | my $encoding = shift(@_);
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318 | my $mode_symbol;
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319 | if ($mode eq 'w' || $mode eq '>')
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320 | {
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321 | $mode_symbol = '>';
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322 | $mode = 'writing';
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323 | }
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324 | elsif ($mode eq 'a' || $mode eq '>>')
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325 | {
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326 | $mode_symbol = '>>';
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327 | $mode = 'appending';
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328 | }
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329 | else
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330 | {
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331 | $mode_symbol = '<';
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332 | $mode = 'reading';
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333 | }
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334 | if (defined $encoding)
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335 | {
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336 | $mode_symbol .= ':' . $encoding;
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337 | }
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338 | return open($$fh_ref, $mode_symbol, $path);
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339 | }
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340 | ## openFileHandle()
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341 |
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342 | # /**
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343 | # */
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344 | sub readDirectory
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345 | {
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346 | my $path = shift(@_);
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347 | my $rvalue;
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348 | if (opendir(DH, $path))
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349 | {
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350 | my @files = readdir(DH);
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351 | close(DH);
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352 | $rvalue = \@files;
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353 | }
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354 | return $rvalue;
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355 | }
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356 | # /** readDirectory() **/
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357 |
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358 |
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359 | ## @function removeFiles()
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360 | #
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361 | sub removeFiles
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362 | {
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363 | my $file = shift(@_);
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364 | my $result = 0;
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365 | if (!-e $file && !-l $file)
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366 | {
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367 | &FileUtils::printError('File does not exist: ' . $file);
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368 | }
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369 | elsif ((!-f $file) && (!-l $file))
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370 | {
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371 | &FileUtils::printError('Not a regular file: ' . $file);
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372 | }
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373 | else
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374 | {
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375 | $result = unlink($file);
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376 | if (!$result)
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377 | {
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378 | &FileUtils::printError('Failed to remove file: ' . $file);
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379 | }
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380 | }
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381 | return $result;
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382 | }
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383 | ## removeFiles()
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384 |
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385 |
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386 | ## @function removeFilesFiltered()
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387 | #
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388 | # recursive removal
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389 | #
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390 | sub removeFilesFiltered
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391 | {
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392 | my ($files, $file_accept_re, $file_reject_re) = @_;
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393 | # my ($cpackage,$cfilename,$cline,$csubr,$chas_args,$cwantarray) = caller(2);
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394 | # my ($lcfilename) = ($cfilename =~ m/([^\\\/]*)$/);
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395 | # print STDERR "** Calling method (2): $lcfilename:$cline $cpackage->$csubr\n";
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396 | my @files_array = (ref $files eq "ARRAY") ? @$files : ($files);
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397 |
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398 | my $num_removed = 0;
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399 |
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400 | foreach my $file (@files_array)
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401 | {
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402 | # remove trailing slashes
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403 | $file =~ s/[\/\\]+$//;
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404 |
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405 | if (!-e $file)
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406 | {
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407 | print STDERR "util::filtered_rm_r $file does not exist\n";
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408 | }
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409 | # don't recurse down symbolic link
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410 | elsif ((-d $file) && (!-l $file))
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411 | {
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412 | # get the contents of this directory
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413 | if (!opendir (INDIR, $file))
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414 | {
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415 | print STDERR "util::filtered_rm_r could not open directory $file\n";
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416 | }
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417 | else
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418 | {
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419 | my @filedir = grep (!/^\.\.?$/, readdir (INDIR));
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420 | closedir (INDIR);
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421 |
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422 | # remove all the files in this directory
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423 | map {$_="$file/$_";} @filedir;
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424 | $num_removed += &FileUtils::LocalFS::removeFilesFiltered(\@filedir, $file_accept_re, $file_reject_re);
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425 |
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426 | if (!defined $file_accept_re && !defined $file_reject_re)
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427 | {
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428 | # remove this directory
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429 | if (!rmdir $file)
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430 | {
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431 | print STDERR "util::filtered_rm_r couldn't remove directory $file\n";
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432 | }
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433 | else
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434 | {
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435 | $num_removed++;
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436 | }
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437 | }
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438 | }
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439 | }
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440 | else
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441 | {
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442 | next if (defined $file_reject_re && ($file =~ m/$file_reject_re/));
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443 |
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444 | if ((!defined $file_accept_re) || ($file =~ m/$file_accept_re/))
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445 | {
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446 | # remove this file
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447 | $num_removed += &removeFiles($file);
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448 | }
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449 | }
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450 | }
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451 | return $num_removed;
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452 | }
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453 | ## removeFilesFiltered()
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454 |
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455 |
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456 | ## @function removeFilesRecursive()
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457 | #
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458 | sub removeFilesRecursive
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459 | {
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460 | my $path = shift(@_);
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461 | # use the more general (but reterospectively written filteredRemove()
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462 | # function with no accept or reject expressions
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463 | return FileUtils::LocalFS::removeFilesFiltered($path, undef, undef);
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464 | }
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465 | ## removeFilesRecursive()
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466 |
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467 |
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468 | ## @function supportsSymbolicLink
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469 | #
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470 | sub supportsSymbolicLink
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471 | {
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472 | return 1;
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473 | }
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474 | ## supportsSymbolicLink()
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475 |
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476 |
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477 | ## @function synchronizeDirectory()
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478 | #
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479 | # updates a copy of a directory in some other part of the filesystem
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480 | # verbosity settings are: 0=low, 1=normal, 2=high
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481 | # both $fromdir and $todir should be absolute paths
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482 | #
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483 | sub synchronizeDirectory
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484 | {
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485 | my ($fromdir, $todir, $verbosity) = @_;
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486 | $verbosity = 1 unless defined $verbosity;
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487 |
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488 | # use / for the directory separator, remove duplicate and
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489 | # trailing slashes
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490 | $fromdir=~s/[\\\/]+/\//g;
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491 | $fromdir=~s/[\\\/]+$//;
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492 | $todir=~s/[\\\/]+/\//g;
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493 | $todir=~s/[\\\/]+$//;
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494 |
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495 | &mk_all_dir ($todir);
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496 |
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497 | # get the directories in ascending order
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498 | if (!opendir (FROMDIR, $fromdir))
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499 | {
|
---|
500 | print STDERR "util::cachedir could not read directory $fromdir\n";
|
---|
501 | return;
|
---|
502 | }
|
---|
503 | my @fromdir = grep (!/^\.\.?$/, sort(readdir (FROMDIR)));
|
---|
504 | closedir (FROMDIR);
|
---|
505 |
|
---|
506 | if (!opendir (TODIR, $todir))
|
---|
507 | {
|
---|
508 | print STDERR "util::cacedir could not read directory $todir\n";
|
---|
509 | return;
|
---|
510 | }
|
---|
511 | my @todir = grep (!/^\.\.?$/, sort(readdir (TODIR)));
|
---|
512 | closedir (TODIR);
|
---|
513 |
|
---|
514 | my $fromi = 0;
|
---|
515 | my $toi = 0;
|
---|
516 |
|
---|
517 | while ($fromi < scalar(@fromdir) || $toi < scalar(@todir))
|
---|
518 | {
|
---|
519 | # print "fromi: $fromi toi: $toi\n";
|
---|
520 |
|
---|
521 | # see if we should delete a file/directory
|
---|
522 | # this should happen if the file/directory
|
---|
523 | # is not in the from list or if its a different
|
---|
524 | # size, or has an older timestamp
|
---|
525 | if ($toi < scalar(@todir))
|
---|
526 | {
|
---|
527 | if (($fromi >= scalar(@fromdir)) ||
|
---|
528 | ($todir[$toi] lt $fromdir[$fromi] ||
|
---|
529 | ($todir[$toi] eq $fromdir[$fromi] &&
|
---|
530 | &differentfiles("$fromdir/$fromdir[$fromi]","$todir/$todir[$toi]",
|
---|
531 | $verbosity))))
|
---|
532 | {
|
---|
533 | # the files are different
|
---|
534 | &rm_r("$todir/$todir[$toi]");
|
---|
535 | splice(@todir, $toi, 1); # $toi stays the same
|
---|
536 | }
|
---|
537 | elsif ($todir[$toi] eq $fromdir[$fromi])
|
---|
538 | {
|
---|
539 | # the files are the same
|
---|
540 | # if it is a directory, check its contents
|
---|
541 | if (-d "$todir/$todir[$toi]")
|
---|
542 | {
|
---|
543 | &synchronizeDirectory("$fromdir/$fromdir[$fromi]", "$todir/$todir[$toi]", $verbosity);
|
---|
544 | }
|
---|
545 |
|
---|
546 | $toi++;
|
---|
547 | $fromi++;
|
---|
548 | next;
|
---|
549 | }
|
---|
550 | }
|
---|
551 |
|
---|
552 | # see if we should insert a file/directory
|
---|
553 | # we should insert a file/directory if there
|
---|
554 | # is no tofiles left or if the tofile does not exist
|
---|
555 | if ($fromi < scalar(@fromdir) && ($toi >= scalar(@todir) ||
|
---|
556 | $todir[$toi] gt $fromdir[$fromi]))
|
---|
557 | {
|
---|
558 | &cp_r ("$fromdir/$fromdir[$fromi]", "$todir/$fromdir[$fromi]");
|
---|
559 | splice (@todir, $toi, 0, $fromdir[$fromi]);
|
---|
560 | $toi++;
|
---|
561 | $fromi++;
|
---|
562 | }
|
---|
563 | }
|
---|
564 | }
|
---|
565 | ## synchronizeDirectory()
|
---|
566 |
|
---|
567 |
|
---|
568 | # /**
|
---|
569 | # */
|
---|
570 | sub transferFile
|
---|
571 | {
|
---|
572 | my ($mode, $file, $dest) = @_;
|
---|
573 | # remove trailing slashes from source and destination files
|
---|
574 | $file =~ s/[\\\/]+$//;
|
---|
575 | $dest =~ s/[\\\/]+$//;
|
---|
576 | my $tempdest = $dest;
|
---|
577 | if (!-e $file)
|
---|
578 | {
|
---|
579 | &FileUtils::printError('File does not exist: ' . $file);
|
---|
580 | }
|
---|
581 | else
|
---|
582 | {
|
---|
583 | if (-d $tempdest)
|
---|
584 | {
|
---|
585 | my ($filename) = $file =~ /([^\\\/]+)$/;
|
---|
586 | $tempdest .= "/$filename";
|
---|
587 | }
|
---|
588 | # start by processing any move request
|
---|
589 | if ($mode eq 'MOVE')
|
---|
590 | {
|
---|
591 | &File::Copy::move($file, $tempdest);
|
---|
592 | }
|
---|
593 | # now if we were instead doing a copy, or if the move request above failed
|
---|
594 | # for some reason, we process a copy request
|
---|
595 | if ($mode eq 'COPY' || !-e $tempdest)
|
---|
596 | {
|
---|
597 | &File::Copy::copy($file, $tempdest);
|
---|
598 | }
|
---|
599 | # finally, we check if a successful move command has somehow left the origin
|
---|
600 | # file lying around (rename partially succeeded - for instance when moving
|
---|
601 | # hardlinks)
|
---|
602 | if ($mode eq 'MOVE' && -e $tempdest && -e $file)
|
---|
603 | {
|
---|
604 | unlink($file);
|
---|
605 | }
|
---|
606 | }
|
---|
607 | # Have we successfully moved the file?
|
---|
608 | my $result = 0;
|
---|
609 | if (-e $tempdest)
|
---|
610 | {
|
---|
611 | if ($mode eq 'MOVE')
|
---|
612 | {
|
---|
613 | if (-e $file)
|
---|
614 | {
|
---|
615 | &FileUtils::printError('Failed to remove original file during move: ' . $file);
|
---|
616 | }
|
---|
617 | else
|
---|
618 | {
|
---|
619 | $result = 1;
|
---|
620 | }
|
---|
621 | }
|
---|
622 | else
|
---|
623 | {
|
---|
624 | $result = 1;
|
---|
625 | }
|
---|
626 | }
|
---|
627 | else
|
---|
628 | {
|
---|
629 | &FileUtils::printError('Failed to move/copy file: ' . $file);
|
---|
630 | }
|
---|
631 | return $result;
|
---|
632 | }
|
---|
633 | # /** moveFile() **/
|
---|
634 |
|
---|
635 | 1;
|
---|