1 | package Cwd;
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2 |
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3 | =head1 NAME
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4 |
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5 | Cwd - get pathname of current working directory
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6 |
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7 | =head1 SYNOPSIS
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8 |
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9 | use Cwd;
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10 | my $dir = getcwd;
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11 |
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12 | use Cwd 'abs_path';
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13 | my $abs_path = abs_path($file);
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14 |
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15 | =head1 DESCRIPTION
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16 |
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17 | This module provides functions for determining the pathname of the
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18 | current working directory. It is recommended that getcwd (or another
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19 | *cwd() function) be used in I<all> code to ensure portability.
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20 |
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21 | By default, it exports the functions cwd(), getcwd(), fastcwd(), and
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22 | fastgetcwd() (and, on Win32, getdcwd()) into the caller's namespace.
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23 |
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24 |
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25 | =head2 getcwd and friends
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26 |
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27 | Each of these functions are called without arguments and return the
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28 | absolute path of the current working directory.
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29 |
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30 | =over 4
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31 |
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32 | =item getcwd
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33 |
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34 | my $cwd = getcwd();
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35 |
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36 | Returns the current working directory.
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37 |
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38 | Re-implements the getcwd(3) (or getwd(3)) functions in Perl.
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39 |
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40 | =item cwd
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41 |
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42 | my $cwd = cwd();
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43 |
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44 | The cwd() is the most natural form for the current architecture. For
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45 | most systems it is identical to `pwd` (but without the trailing line
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46 | terminator).
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47 |
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48 | =item fastcwd
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49 |
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50 | my $cwd = fastcwd();
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51 |
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52 | A more dangerous version of getcwd(), but potentially faster.
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53 |
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54 | It might conceivably chdir() you out of a directory that it can't
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55 | chdir() you back into. If fastcwd encounters a problem it will return
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56 | undef but will probably leave you in a different directory. For a
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57 | measure of extra security, if everything appears to have worked, the
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58 | fastcwd() function will check that it leaves you in the same directory
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59 | that it started in. If it has changed it will C<die> with the message
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60 | "Unstable directory path, current directory changed
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61 | unexpectedly". That should never happen.
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62 |
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63 | =item fastgetcwd
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64 |
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65 | my $cwd = fastgetcwd();
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66 |
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67 | The fastgetcwd() function is provided as a synonym for cwd().
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68 |
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69 | =item getdcwd
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70 |
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71 | my $cwd = getdcwd();
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72 | my $cwd = getdcwd('C:');
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73 |
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74 | The getdcwd() function is also provided on Win32 to get the current working
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75 | directory on the specified drive, since Windows maintains a separate current
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76 | working directory for each drive. If no drive is specified then the current
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77 | drive is assumed.
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78 |
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79 | This function simply calls the Microsoft C library _getdcwd() function.
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80 |
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81 | =back
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82 |
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83 |
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84 | =head2 abs_path and friends
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85 |
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86 | These functions are exported only on request. They each take a single
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87 | argument and return the absolute pathname for it. If no argument is
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88 | given they'll use the current working directory.
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89 |
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90 | =over 4
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91 |
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92 | =item abs_path
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93 |
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94 | my $abs_path = abs_path($file);
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95 |
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96 | Uses the same algorithm as getcwd(). Symbolic links and relative-path
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97 | components ("." and "..") are resolved to return the canonical
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98 | pathname, just like realpath(3).
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99 |
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100 | =item realpath
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101 |
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102 | my $abs_path = realpath($file);
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103 |
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104 | A synonym for abs_path().
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105 |
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106 | =item fast_abs_path
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107 |
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108 | my $abs_path = fast_abs_path($file);
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109 |
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110 | A more dangerous, but potentially faster version of abs_path.
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111 |
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112 | =back
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113 |
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114 | =head2 $ENV{PWD}
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115 |
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116 | If you ask to override your chdir() built-in function,
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117 |
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118 | use Cwd qw(chdir);
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119 |
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120 | then your PWD environment variable will be kept up to date. Note that
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121 | it will only be kept up to date if all packages which use chdir import
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122 | it from Cwd.
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123 |
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124 |
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125 | =head1 NOTES
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126 |
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127 | =over 4
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128 |
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129 | =item *
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130 |
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131 | Since the path seperators are different on some operating systems ('/'
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132 | on Unix, ':' on MacPerl, etc...) we recommend you use the File::Spec
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133 | modules wherever portability is a concern.
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134 |
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135 | =item *
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136 |
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137 | Actually, on Mac OS, the C<getcwd()>, C<fastgetcwd()> and C<fastcwd()>
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138 | functions are all aliases for the C<cwd()> function, which, on Mac OS,
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139 | calls `pwd`. Likewise, the C<abs_path()> function is an alias for
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140 | C<fast_abs_path()>.
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141 |
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142 | =back
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143 |
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144 | =head1 AUTHOR
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145 |
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146 | Originally by the perl5-porters.
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147 |
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148 | Maintained by Ken Williams <[email protected]>
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149 |
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150 | =head1 COPYRIGHT
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151 |
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152 | Copyright (c) 2004 by the Perl 5 Porters. All rights reserved.
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153 |
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154 | This program is free software; you can redistribute it and/or modify
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155 | it under the same terms as Perl itself.
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156 |
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157 | Portions of the C code in this library are copyright (c) 1994 by the
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158 | Regents of the University of California. All rights reserved. The
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159 | license on this code is compatible with the licensing of the rest of
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160 | the distribution - please see the source code in F<Cwd.xs> for the
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161 | details.
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162 |
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163 | =head1 SEE ALSO
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164 |
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165 | L<File::chdir>
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166 |
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167 | =cut
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168 |
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169 | use strict;
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170 | use Exporter;
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171 | use vars qw(@ISA @EXPORT @EXPORT_OK $VERSION);
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172 |
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173 | $VERSION = '3.12';
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174 |
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175 | @ISA = qw/ Exporter /;
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176 | @EXPORT = qw(cwd getcwd fastcwd fastgetcwd);
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177 | push @EXPORT, qw(getdcwd) if $^O eq 'MSWin32';
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178 | @EXPORT_OK = qw(chdir abs_path fast_abs_path realpath fast_realpath);
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179 |
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180 | # sys_cwd may keep the builtin command
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181 |
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182 | # All the functionality of this module may provided by builtins,
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183 | # there is no sense to process the rest of the file.
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184 | # The best choice may be to have this in BEGIN, but how to return from BEGIN?
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185 |
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186 | if ($^O eq 'os2') {
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187 | local $^W = 0;
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188 |
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189 | *cwd = defined &sys_cwd ? \&sys_cwd : \&_os2_cwd;
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190 | *getcwd = \&cwd;
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191 | *fastgetcwd = \&cwd;
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192 | *fastcwd = \&cwd;
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193 |
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194 | *fast_abs_path = \&sys_abspath if defined &sys_abspath;
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195 | *abs_path = \&fast_abs_path;
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196 | *realpath = \&fast_abs_path;
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197 | *fast_realpath = \&fast_abs_path;
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198 |
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199 | return 1;
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200 | }
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201 |
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202 | # If loading the XS stuff doesn't work, we can fall back to pure perl
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203 | eval {
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204 | if ( $] >= 5.006 ) {
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205 | require XSLoader;
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206 | XSLoader::load( __PACKAGE__, $VERSION );
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207 | } else {
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208 | require DynaLoader;
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209 | push @ISA, 'DynaLoader';
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210 | __PACKAGE__->bootstrap( $VERSION );
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211 | }
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212 | };
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213 |
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214 | # Must be after the DynaLoader stuff:
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215 | $VERSION = eval $VERSION;
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216 |
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217 | # Big nasty table of function aliases
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218 | my %METHOD_MAP =
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219 | (
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220 | VMS =>
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221 | {
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222 | cwd => '_vms_cwd',
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223 | getcwd => '_vms_cwd',
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224 | fastcwd => '_vms_cwd',
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225 | fastgetcwd => '_vms_cwd',
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226 | abs_path => '_vms_abs_path',
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227 | fast_abs_path => '_vms_abs_path',
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228 | },
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229 |
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230 | MSWin32 =>
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231 | {
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232 | # We assume that &_NT_cwd is defined as an XSUB or in the core.
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233 | cwd => '_NT_cwd',
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234 | getcwd => '_NT_cwd',
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235 | fastcwd => '_NT_cwd',
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236 | fastgetcwd => '_NT_cwd',
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237 | abs_path => 'fast_abs_path',
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238 | realpath => 'fast_abs_path',
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239 | },
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240 |
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241 | dos =>
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242 | {
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243 | cwd => '_dos_cwd',
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244 | getcwd => '_dos_cwd',
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245 | fastgetcwd => '_dos_cwd',
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246 | fastcwd => '_dos_cwd',
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247 | abs_path => 'fast_abs_path',
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248 | },
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249 |
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250 | qnx =>
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251 | {
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252 | cwd => '_qnx_cwd',
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253 | getcwd => '_qnx_cwd',
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254 | fastgetcwd => '_qnx_cwd',
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255 | fastcwd => '_qnx_cwd',
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256 | abs_path => '_qnx_abs_path',
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257 | fast_abs_path => '_qnx_abs_path',
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258 | },
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259 |
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260 | cygwin =>
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261 | {
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262 | getcwd => 'cwd',
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263 | fastgetcwd => 'cwd',
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264 | fastcwd => 'cwd',
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265 | abs_path => 'fast_abs_path',
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266 | realpath => 'fast_abs_path',
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267 | },
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268 |
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269 | epoc =>
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270 | {
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271 | cwd => '_epoc_cwd',
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272 | getcwd => '_epoc_cwd',
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273 | fastgetcwd => '_epoc_cwd',
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274 | fastcwd => '_epoc_cwd',
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275 | abs_path => 'fast_abs_path',
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276 | },
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277 |
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278 | MacOS =>
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279 | {
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280 | getcwd => 'cwd',
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281 | fastgetcwd => 'cwd',
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282 | fastcwd => 'cwd',
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283 | abs_path => 'fast_abs_path',
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284 | },
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285 | );
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286 |
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287 | $METHOD_MAP{NT} = $METHOD_MAP{MSWin32};
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288 | $METHOD_MAP{nto} = $METHOD_MAP{qnx};
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289 |
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290 |
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291 | # Find the pwd command in the expected locations. We assume these
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292 | # are safe. This prevents _backtick_pwd() consulting $ENV{PATH}
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293 | # so everything works under taint mode.
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294 | my $pwd_cmd;
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295 | foreach my $try ('/bin/pwd',
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296 | '/usr/bin/pwd',
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297 | '/QOpenSys/bin/pwd', # OS/400 PASE.
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298 | ) {
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299 |
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300 | if( -x $try ) {
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301 | $pwd_cmd = $try;
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302 | last;
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303 | }
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304 | }
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305 | unless ($pwd_cmd) {
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306 | # Isn't this wrong? _backtick_pwd() will fail if somenone has
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307 | # pwd in their path but it is not /bin/pwd or /usr/bin/pwd?
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308 | # See [perl #16774]. --jhi
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309 | $pwd_cmd = 'pwd';
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310 | }
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311 |
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312 | # Lazy-load Carp
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313 | sub _carp { require Carp; Carp::carp(@_) }
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314 | sub _croak { require Carp; Carp::croak(@_) }
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315 |
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316 | # The 'natural and safe form' for UNIX (pwd may be setuid root)
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317 | sub _backtick_pwd {
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318 | # Localize %ENV entries in a way that won't create new hash keys
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319 | my @localize = grep exists $ENV{$_}, qw(PATH IFS CDPATH ENV BASH_ENV);
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320 | local @ENV{@localize};
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321 |
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322 | my $cwd = `$pwd_cmd`;
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323 | # Belt-and-suspenders in case someone said "undef $/".
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324 | local $/ = "\n";
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325 | # `pwd` may fail e.g. if the disk is full
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326 | chomp($cwd) if defined $cwd;
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327 | $cwd;
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328 | }
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329 |
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330 | # Since some ports may predefine cwd internally (e.g., NT)
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331 | # we take care not to override an existing definition for cwd().
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332 |
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333 | unless ($METHOD_MAP{$^O}{cwd} or defined &cwd) {
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334 | # The pwd command is not available in some chroot(2)'ed environments
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335 | my $sep = $Config::Config{path_sep} || ':';
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336 | my $os = $^O; # Protect $^O from tainting
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337 | if( $os eq 'MacOS' || (defined $ENV{PATH} &&
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338 | $os ne 'MSWin32' && # no pwd on Windows
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339 | grep { -x "$_/pwd" } split($sep, $ENV{PATH})) )
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340 | {
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341 | *cwd = \&_backtick_pwd;
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342 | }
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343 | else {
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344 | *cwd = \&getcwd;
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345 | }
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346 | }
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347 |
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348 | # set a reasonable (and very safe) default for fastgetcwd, in case it
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349 | # isn't redefined later (20001212 rspier)
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350 | *fastgetcwd = \&cwd;
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351 |
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352 | # By Brandon S. Allbery
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353 | #
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354 | # Usage: $cwd = getcwd();
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355 |
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356 | sub getcwd
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357 | {
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358 | abs_path('.');
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359 | }
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360 |
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361 |
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362 | # By John Bazik
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363 | #
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364 | # Usage: $cwd = &fastcwd;
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365 | #
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366 | # This is a faster version of getcwd. It's also more dangerous because
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367 | # you might chdir out of a directory that you can't chdir back into.
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368 |
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369 | sub fastcwd_ {
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370 | my($odev, $oino, $cdev, $cino, $tdev, $tino);
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371 | my(@path, $path);
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372 | local(*DIR);
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373 |
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374 | my($orig_cdev, $orig_cino) = stat('.');
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375 | ($cdev, $cino) = ($orig_cdev, $orig_cino);
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376 | for (;;) {
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377 | my $direntry;
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378 | ($odev, $oino) = ($cdev, $cino);
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379 | CORE::chdir('..') || return undef;
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380 | ($cdev, $cino) = stat('.');
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381 | last if $odev == $cdev && $oino == $cino;
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382 | opendir(DIR, '.') || return undef;
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383 | for (;;) {
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384 | $direntry = readdir(DIR);
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385 | last unless defined $direntry;
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386 | next if $direntry eq '.';
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387 | next if $direntry eq '..';
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388 |
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389 | ($tdev, $tino) = lstat($direntry);
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390 | last unless $tdev != $odev || $tino != $oino;
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391 | }
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392 | closedir(DIR);
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393 | return undef unless defined $direntry; # should never happen
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394 | unshift(@path, $direntry);
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395 | }
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396 | $path = '/' . join('/', @path);
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397 | if ($^O eq 'apollo') { $path = "/".$path; }
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398 | # At this point $path may be tainted (if tainting) and chdir would fail.
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399 | # Untaint it then check that we landed where we started.
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400 | $path =~ /^(.*)\z/s # untaint
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401 | && CORE::chdir($1) or return undef;
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402 | ($cdev, $cino) = stat('.');
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403 | die "Unstable directory path, current directory changed unexpectedly"
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404 | if $cdev != $orig_cdev || $cino != $orig_cino;
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405 | $path;
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406 | }
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407 | if (not defined &fastcwd) { *fastcwd = \&fastcwd_ }
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408 |
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409 |
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410 | # Keeps track of current working directory in PWD environment var
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411 | # Usage:
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412 | # use Cwd 'chdir';
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413 | # chdir $newdir;
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414 |
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415 | my $chdir_init = 0;
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416 |
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417 | sub chdir_init {
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418 | if ($ENV{'PWD'} and $^O ne 'os2' and $^O ne 'dos' and $^O ne 'MSWin32') {
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419 | my($dd,$di) = stat('.');
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420 | my($pd,$pi) = stat($ENV{'PWD'});
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421 | if (!defined $dd or !defined $pd or $di != $pi or $dd != $pd) {
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422 | $ENV{'PWD'} = cwd();
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423 | }
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424 | }
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425 | else {
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426 | my $wd = cwd();
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427 | $wd = Win32::GetFullPathName($wd) if $^O eq 'MSWin32';
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428 | $ENV{'PWD'} = $wd;
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429 | }
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430 | # Strip an automounter prefix (where /tmp_mnt/foo/bar == /foo/bar)
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431 | if ($^O ne 'MSWin32' and $ENV{'PWD'} =~ m|(/[^/]+(/[^/]+/[^/]+))(.*)|s) {
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432 | my($pd,$pi) = stat($2);
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433 | my($dd,$di) = stat($1);
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434 | if (defined $pd and defined $dd and $di == $pi and $dd == $pd) {
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435 | $ENV{'PWD'}="$2$3";
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436 | }
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437 | }
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438 | $chdir_init = 1;
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439 | }
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440 |
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441 | sub chdir {
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442 | my $newdir = @_ ? shift : ''; # allow for no arg (chdir to HOME dir)
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443 | $newdir =~ s|///*|/|g unless $^O eq 'MSWin32';
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444 | chdir_init() unless $chdir_init;
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445 | my $newpwd;
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446 | if ($^O eq 'MSWin32') {
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447 | # get the full path name *before* the chdir()
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448 | $newpwd = Win32::GetFullPathName($newdir);
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449 | }
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450 |
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451 | return 0 unless CORE::chdir $newdir;
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452 |
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453 | if ($^O eq 'VMS') {
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454 | return $ENV{'PWD'} = $ENV{'DEFAULT'}
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455 | }
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456 | elsif ($^O eq 'MacOS') {
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457 | return $ENV{'PWD'} = cwd();
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458 | }
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459 | elsif ($^O eq 'MSWin32') {
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460 | $ENV{'PWD'} = $newpwd;
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461 | return 1;
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462 | }
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463 |
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464 | if ($newdir =~ m#^/#s) {
|
---|
465 | $ENV{'PWD'} = $newdir;
|
---|
466 | } else {
|
---|
467 | my @curdir = split(m#/#,$ENV{'PWD'});
|
---|
468 | @curdir = ('') unless @curdir;
|
---|
469 | my $component;
|
---|
470 | foreach $component (split(m#/#, $newdir)) {
|
---|
471 | next if $component eq '.';
|
---|
472 | pop(@curdir),next if $component eq '..';
|
---|
473 | push(@curdir,$component);
|
---|
474 | }
|
---|
475 | $ENV{'PWD'} = join('/',@curdir) || '/';
|
---|
476 | }
|
---|
477 | 1;
|
---|
478 | }
|
---|
479 |
|
---|
480 |
|
---|
481 | sub _perl_abs_path
|
---|
482 | {
|
---|
483 | my $start = @_ ? shift : '.';
|
---|
484 | my($dotdots, $cwd, @pst, @cst, $dir, @tst);
|
---|
485 |
|
---|
486 | unless (@cst = stat( $start ))
|
---|
487 | {
|
---|
488 | _carp("stat($start): $!");
|
---|
489 | return '';
|
---|
490 | }
|
---|
491 |
|
---|
492 | unless (-d _) {
|
---|
493 | # Make sure we can be invoked on plain files, not just directories.
|
---|
494 | # NOTE that this routine assumes that '/' is the only directory separator.
|
---|
495 |
|
---|
496 | my ($dir, $file) = $start =~ m{^(.*)/(.+)$}
|
---|
497 | or return cwd() . '/' . $start;
|
---|
498 |
|
---|
499 | # Can't use "-l _" here, because the previous stat was a stat(), not an lstat().
|
---|
500 | if (-l $start) {
|
---|
501 | my $link_target = readlink($start);
|
---|
502 | die "Can't resolve link $start: $!" unless defined $link_target;
|
---|
503 |
|
---|
504 | require File::Spec;
|
---|
505 | $link_target = $dir . '/' . $link_target
|
---|
506 | unless File::Spec->file_name_is_absolute($link_target);
|
---|
507 |
|
---|
508 | return abs_path($link_target);
|
---|
509 | }
|
---|
510 |
|
---|
511 | return $dir ? abs_path($dir) . "/$file" : "/$file";
|
---|
512 | }
|
---|
513 |
|
---|
514 | $cwd = '';
|
---|
515 | $dotdots = $start;
|
---|
516 | do
|
---|
517 | {
|
---|
518 | $dotdots .= '/..';
|
---|
519 | @pst = @cst;
|
---|
520 | local *PARENT;
|
---|
521 | unless (opendir(PARENT, $dotdots))
|
---|
522 | {
|
---|
523 | _carp("opendir($dotdots): $!");
|
---|
524 | return '';
|
---|
525 | }
|
---|
526 | unless (@cst = stat($dotdots))
|
---|
527 | {
|
---|
528 | _carp("stat($dotdots): $!");
|
---|
529 | closedir(PARENT);
|
---|
530 | return '';
|
---|
531 | }
|
---|
532 | if ($pst[0] == $cst[0] && $pst[1] == $cst[1])
|
---|
533 | {
|
---|
534 | $dir = undef;
|
---|
535 | }
|
---|
536 | else
|
---|
537 | {
|
---|
538 | do
|
---|
539 | {
|
---|
540 | unless (defined ($dir = readdir(PARENT)))
|
---|
541 | {
|
---|
542 | _carp("readdir($dotdots): $!");
|
---|
543 | closedir(PARENT);
|
---|
544 | return '';
|
---|
545 | }
|
---|
546 | $tst[0] = $pst[0]+1 unless (@tst = lstat("$dotdots/$dir"))
|
---|
547 | }
|
---|
548 | while ($dir eq '.' || $dir eq '..' || $tst[0] != $pst[0] ||
|
---|
549 | $tst[1] != $pst[1]);
|
---|
550 | }
|
---|
551 | $cwd = (defined $dir ? "$dir" : "" ) . "/$cwd" ;
|
---|
552 | closedir(PARENT);
|
---|
553 | } while (defined $dir);
|
---|
554 | chop($cwd) unless $cwd eq '/'; # drop the trailing /
|
---|
555 | $cwd;
|
---|
556 | }
|
---|
557 |
|
---|
558 |
|
---|
559 | my $Curdir;
|
---|
560 | sub fast_abs_path {
|
---|
561 | local $ENV{PWD} = $ENV{PWD} || ''; # Guard against clobberage
|
---|
562 | my $cwd = getcwd();
|
---|
563 | require File::Spec;
|
---|
564 | my $path = @_ ? shift : ($Curdir ||= File::Spec->curdir);
|
---|
565 |
|
---|
566 | # Detaint else we'll explode in taint mode. This is safe because
|
---|
567 | # we're not doing anything dangerous with it.
|
---|
568 | ($path) = $path =~ /(.*)/;
|
---|
569 | ($cwd) = $cwd =~ /(.*)/;
|
---|
570 |
|
---|
571 | unless (-e $path) {
|
---|
572 | _croak("$path: No such file or directory");
|
---|
573 | }
|
---|
574 |
|
---|
575 | unless (-d _) {
|
---|
576 | # Make sure we can be invoked on plain files, not just directories.
|
---|
577 |
|
---|
578 | my ($vol, $dir, $file) = File::Spec->splitpath($path);
|
---|
579 | return File::Spec->catfile($cwd, $path) unless length $dir;
|
---|
580 |
|
---|
581 | if (-l $path) {
|
---|
582 | my $link_target = readlink($path);
|
---|
583 | die "Can't resolve link $path: $!" unless defined $link_target;
|
---|
584 |
|
---|
585 | $link_target = File::Spec->catpath($vol, $dir, $link_target)
|
---|
586 | unless File::Spec->file_name_is_absolute($link_target);
|
---|
587 |
|
---|
588 | return fast_abs_path($link_target);
|
---|
589 | }
|
---|
590 |
|
---|
591 | return $dir eq File::Spec->rootdir
|
---|
592 | ? File::Spec->catpath($vol, $dir, $file)
|
---|
593 | : fast_abs_path(File::Spec->catpath($vol, $dir, '')) . '/' . $file;
|
---|
594 | }
|
---|
595 |
|
---|
596 | if (!CORE::chdir($path)) {
|
---|
597 | _croak("Cannot chdir to $path: $!");
|
---|
598 | }
|
---|
599 | my $realpath = getcwd();
|
---|
600 | if (! ((-d $cwd) && (CORE::chdir($cwd)))) {
|
---|
601 | _croak("Cannot chdir back to $cwd: $!");
|
---|
602 | }
|
---|
603 | $realpath;
|
---|
604 | }
|
---|
605 |
|
---|
606 | # added function alias to follow principle of least surprise
|
---|
607 | # based on previous aliasing. --tchrist 27-Jan-00
|
---|
608 | *fast_realpath = \&fast_abs_path;
|
---|
609 |
|
---|
610 |
|
---|
611 | # --- PORTING SECTION ---
|
---|
612 |
|
---|
613 | # VMS: $ENV{'DEFAULT'} points to default directory at all times
|
---|
614 | # 06-Mar-1996 Charles Bailey [email protected]
|
---|
615 | # Note: Use of Cwd::chdir() causes the logical name PWD to be defined
|
---|
616 | # in the process logical name table as the default device and directory
|
---|
617 | # seen by Perl. This may not be the same as the default device
|
---|
618 | # and directory seen by DCL after Perl exits, since the effects
|
---|
619 | # the CRTL chdir() function persist only until Perl exits.
|
---|
620 |
|
---|
621 | sub _vms_cwd {
|
---|
622 | return $ENV{'DEFAULT'};
|
---|
623 | }
|
---|
624 |
|
---|
625 | sub _vms_abs_path {
|
---|
626 | return $ENV{'DEFAULT'} unless @_;
|
---|
627 |
|
---|
628 | # may need to turn foo.dir into [.foo]
|
---|
629 | my $path = VMS::Filespec::pathify($_[0]);
|
---|
630 | $path = $_[0] unless defined $path;
|
---|
631 |
|
---|
632 | return VMS::Filespec::rmsexpand($path);
|
---|
633 | }
|
---|
634 |
|
---|
635 | sub _os2_cwd {
|
---|
636 | $ENV{'PWD'} = `cmd /c cd`;
|
---|
637 | chomp $ENV{'PWD'};
|
---|
638 | $ENV{'PWD'} =~ s:\\:/:g ;
|
---|
639 | return $ENV{'PWD'};
|
---|
640 | }
|
---|
641 |
|
---|
642 | sub _win32_cwd {
|
---|
643 | $ENV{'PWD'} = Win32::GetCwd();
|
---|
644 | $ENV{'PWD'} =~ s:\\:/:g ;
|
---|
645 | return $ENV{'PWD'};
|
---|
646 | }
|
---|
647 |
|
---|
648 | *_NT_cwd = defined &Win32::GetCwd ? \&_win32_cwd : \&_os2_cwd;
|
---|
649 |
|
---|
650 | sub _dos_cwd {
|
---|
651 | if (!defined &Dos::GetCwd) {
|
---|
652 | $ENV{'PWD'} = `command /c cd`;
|
---|
653 | chomp $ENV{'PWD'};
|
---|
654 | $ENV{'PWD'} =~ s:\\:/:g ;
|
---|
655 | } else {
|
---|
656 | $ENV{'PWD'} = Dos::GetCwd();
|
---|
657 | }
|
---|
658 | return $ENV{'PWD'};
|
---|
659 | }
|
---|
660 |
|
---|
661 | sub _qnx_cwd {
|
---|
662 | local $ENV{PATH} = '';
|
---|
663 | local $ENV{CDPATH} = '';
|
---|
664 | local $ENV{ENV} = '';
|
---|
665 | $ENV{'PWD'} = `/usr/bin/fullpath -t`;
|
---|
666 | chomp $ENV{'PWD'};
|
---|
667 | return $ENV{'PWD'};
|
---|
668 | }
|
---|
669 |
|
---|
670 | sub _qnx_abs_path {
|
---|
671 | local $ENV{PATH} = '';
|
---|
672 | local $ENV{CDPATH} = '';
|
---|
673 | local $ENV{ENV} = '';
|
---|
674 | my $path = @_ ? shift : '.';
|
---|
675 | local *REALPATH;
|
---|
676 |
|
---|
677 | defined( open(REALPATH, '-|') || exec '/usr/bin/fullpath', '-t', $path ) or
|
---|
678 | die "Can't open /usr/bin/fullpath: $!";
|
---|
679 | my $realpath = <REALPATH>;
|
---|
680 | close REALPATH;
|
---|
681 | chomp $realpath;
|
---|
682 | return $realpath;
|
---|
683 | }
|
---|
684 |
|
---|
685 | sub _epoc_cwd {
|
---|
686 | $ENV{'PWD'} = EPOC::getcwd();
|
---|
687 | return $ENV{'PWD'};
|
---|
688 | }
|
---|
689 |
|
---|
690 |
|
---|
691 | # Now that all the base-level functions are set up, alias the
|
---|
692 | # user-level functions to the right places
|
---|
693 |
|
---|
694 | if (exists $METHOD_MAP{$^O}) {
|
---|
695 | my $map = $METHOD_MAP{$^O};
|
---|
696 | foreach my $name (keys %$map) {
|
---|
697 | local $^W = 0; # assignments trigger 'subroutine redefined' warning
|
---|
698 | no strict 'refs';
|
---|
699 | *{$name} = \&{$map->{$name}};
|
---|
700 | }
|
---|
701 | }
|
---|
702 |
|
---|
703 | # In case the XS version doesn't load.
|
---|
704 | *abs_path = \&_perl_abs_path unless defined &abs_path;
|
---|
705 |
|
---|
706 | # added function alias for those of us more
|
---|
707 | # used to the libc function. --tchrist 27-Jan-00
|
---|
708 | *realpath = \&abs_path;
|
---|
709 |
|
---|
710 | 1;
|
---|