Commit | Line | Data |
---|---|---|
a0d0e21e | 1 | package Cwd; |
b060a406 | 2 | use strict; |
a9939470 | 3 | use Exporter; |
99f36a73 | 4 | |
1a58b39a | 5 | our $VERSION = '3.69'; |
4a4ab19c | 6 | my $xs_version = $VERSION; |
4f642d62 | 7 | $VERSION =~ tr/_//d; |
96e4d5b1 | 8 | |
1a58b39a N |
9 | our @ISA = qw/ Exporter /; |
10 | our @EXPORT = qw(cwd getcwd fastcwd fastgetcwd); | |
09122b95 | 11 | push @EXPORT, qw(getdcwd) if $^O eq 'MSWin32'; |
1a58b39a | 12 | our @EXPORT_OK = qw(chdir abs_path fast_abs_path realpath fast_realpath); |
a0d0e21e | 13 | |
f5f423e4 IZ |
14 | # sys_cwd may keep the builtin command |
15 | ||
16 | # All the functionality of this module may provided by builtins, | |
17 | # there is no sense to process the rest of the file. | |
18 | # The best choice may be to have this in BEGIN, but how to return from BEGIN? | |
19 | ||
a9939470 | 20 | if ($^O eq 'os2') { |
f5f423e4 | 21 | local $^W = 0; |
a9939470 NC |
22 | |
23 | *cwd = defined &sys_cwd ? \&sys_cwd : \&_os2_cwd; | |
24 | *getcwd = \&cwd; | |
25 | *fastgetcwd = \&cwd; | |
26 | *fastcwd = \&cwd; | |
27 | ||
28 | *fast_abs_path = \&sys_abspath if defined &sys_abspath; | |
29 | *abs_path = \&fast_abs_path; | |
30 | *realpath = \&fast_abs_path; | |
31 | *fast_realpath = \&fast_abs_path; | |
32 | ||
f5f423e4 IZ |
33 | return 1; |
34 | } | |
35 | ||
53e80d0b JM |
36 | # Need to look up the feature settings on VMS. The preferred way is to use the |
37 | # VMS::Feature module, but that may not be available to dual life modules. | |
38 | ||
39 | my $use_vms_feature; | |
40 | BEGIN { | |
41 | if ($^O eq 'VMS') { | |
8901ddee TC |
42 | if (eval { local $SIG{__DIE__}; |
43 | local @INC = @INC; | |
44 | pop @INC if $INC[-1] eq '.'; | |
45 | require VMS::Feature; }) { | |
53e80d0b JM |
46 | $use_vms_feature = 1; |
47 | } | |
48 | } | |
49 | } | |
50 | ||
51 | # Need to look up the UNIX report mode. This may become a dynamic mode | |
52 | # in the future. | |
53 | sub _vms_unix_rpt { | |
54 | my $unix_rpt; | |
55 | if ($use_vms_feature) { | |
56 | $unix_rpt = VMS::Feature::current("filename_unix_report"); | |
57 | } else { | |
58 | my $env_unix_rpt = $ENV{'DECC$FILENAME_UNIX_REPORT'} || ''; | |
a7884731 | 59 | $unix_rpt = $env_unix_rpt =~ /^[ET1]/i; |
53e80d0b JM |
60 | } |
61 | return $unix_rpt; | |
62 | } | |
63 | ||
64 | # Need to look up the EFS character set mode. This may become a dynamic | |
65 | # mode in the future. | |
66 | sub _vms_efs { | |
67 | my $efs; | |
68 | if ($use_vms_feature) { | |
69 | $efs = VMS::Feature::current("efs_charset"); | |
70 | } else { | |
71 | my $env_efs = $ENV{'DECC$EFS_CHARSET'} || ''; | |
a7884731 | 72 | $efs = $env_efs =~ /^[ET1]/i; |
53e80d0b JM |
73 | } |
74 | return $efs; | |
75 | } | |
76 | ||
77 | ||
b04f6d36 | 78 | # If loading the XS stuff doesn't work, we can fall back to pure perl |
96dcbc37 DD |
79 | if(! defined &getcwd && defined &DynaLoader::boot_DynaLoader) { |
80 | eval {#eval is questionable since we are handling potential errors like | |
ef47896b | 81 | #"Cwd object version 3.48 does not match bootstrap parameter 3.50 |
96dcbc37 | 82 | #at lib/DynaLoader.pm line 216." by having this eval |
07f43755 Z |
83 | if ( $] >= 5.006 ) { |
84 | require XSLoader; | |
85 | XSLoader::load( __PACKAGE__, $xs_version); | |
86 | } else { | |
87 | require DynaLoader; | |
88 | push @ISA, 'DynaLoader'; | |
89 | __PACKAGE__->bootstrap( $xs_version ); | |
90 | } | |
91 | }; | |
92 | } | |
4633a7c4 | 93 | |
09122b95 RGS |
94 | # Big nasty table of function aliases |
95 | my %METHOD_MAP = | |
96 | ( | |
97 | VMS => | |
98 | { | |
99 | cwd => '_vms_cwd', | |
100 | getcwd => '_vms_cwd', | |
101 | fastcwd => '_vms_cwd', | |
102 | fastgetcwd => '_vms_cwd', | |
103 | abs_path => '_vms_abs_path', | |
104 | fast_abs_path => '_vms_abs_path', | |
105 | }, | |
106 | ||
107 | MSWin32 => | |
108 | { | |
109 | # We assume that &_NT_cwd is defined as an XSUB or in the core. | |
110 | cwd => '_NT_cwd', | |
111 | getcwd => '_NT_cwd', | |
112 | fastcwd => '_NT_cwd', | |
113 | fastgetcwd => '_NT_cwd', | |
114 | abs_path => 'fast_abs_path', | |
115 | realpath => 'fast_abs_path', | |
116 | }, | |
117 | ||
118 | dos => | |
119 | { | |
120 | cwd => '_dos_cwd', | |
121 | getcwd => '_dos_cwd', | |
122 | fastgetcwd => '_dos_cwd', | |
123 | fastcwd => '_dos_cwd', | |
124 | abs_path => 'fast_abs_path', | |
125 | }, | |
126 | ||
58ccccf6 | 127 | # QNX4. QNX6 has a $os of 'nto'. |
09122b95 RGS |
128 | qnx => |
129 | { | |
130 | cwd => '_qnx_cwd', | |
131 | getcwd => '_qnx_cwd', | |
132 | fastgetcwd => '_qnx_cwd', | |
133 | fastcwd => '_qnx_cwd', | |
134 | abs_path => '_qnx_abs_path', | |
135 | fast_abs_path => '_qnx_abs_path', | |
136 | }, | |
137 | ||
138 | cygwin => | |
139 | { | |
140 | getcwd => 'cwd', | |
141 | fastgetcwd => 'cwd', | |
142 | fastcwd => 'cwd', | |
143 | abs_path => 'fast_abs_path', | |
144 | realpath => 'fast_abs_path', | |
145 | }, | |
146 | ||
147 | epoc => | |
148 | { | |
149 | cwd => '_epoc_cwd', | |
150 | getcwd => '_epoc_cwd', | |
151 | fastgetcwd => '_epoc_cwd', | |
152 | fastcwd => '_epoc_cwd', | |
153 | abs_path => 'fast_abs_path', | |
154 | }, | |
155 | ||
156 | MacOS => | |
157 | { | |
158 | getcwd => 'cwd', | |
159 | fastgetcwd => 'cwd', | |
160 | fastcwd => 'cwd', | |
161 | abs_path => 'fast_abs_path', | |
162 | }, | |
027b7a30 AB |
163 | |
164 | amigaos => | |
165 | { | |
166 | getcwd => '_backtick_pwd', | |
167 | fastgetcwd => '_backtick_pwd', | |
168 | fastcwd => '_backtick_pwd', | |
169 | abs_path => 'fast_abs_path', | |
170 | } | |
09122b95 RGS |
171 | ); |
172 | ||
173 | $METHOD_MAP{NT} = $METHOD_MAP{MSWin32}; | |
09122b95 | 174 | |
96e4d5b1 | 175 | |
3547aa9a MS |
176 | # Find the pwd command in the expected locations. We assume these |
177 | # are safe. This prevents _backtick_pwd() consulting $ENV{PATH} | |
178 | # so everything works under taint mode. | |
179 | my $pwd_cmd; | |
f4eedc6b DD |
180 | if($^O ne 'MSWin32') { |
181 | foreach my $try ('/bin/pwd', | |
182 | '/usr/bin/pwd', | |
183 | '/QOpenSys/bin/pwd', # OS/400 PASE. | |
184 | ) { | |
185 | if( -x $try ) { | |
186 | $pwd_cmd = $try; | |
187 | last; | |
188 | } | |
3547aa9a MS |
189 | } |
190 | } | |
b2fc9074 BF |
191 | |
192 | # Android has a built-in pwd. Using $pwd_cmd will DTRT if | |
193 | # this perl was compiled with -Dd_useshellcmds, which is the | |
194 | # default for Android, but the block below is needed for the | |
195 | # miniperl running on the host when cross-compiling, and | |
196 | # potentially for native builds with -Ud_useshellcmds. | |
197 | if ($^O =~ /android/) { | |
198 | # If targetsh is executable, then we're either a full | |
199 | # perl, or a miniperl for a native build. | |
200 | if (-x $Config::Config{targetsh}) { | |
201 | $pwd_cmd = "$Config::Config{targetsh} -c pwd" | |
202 | } | |
203 | else { | |
e7d73da9 BF |
204 | my $sh = $Config::Config{sh} || (-x '/system/bin/sh' ? '/system/bin/sh' : 'sh'); |
205 | $pwd_cmd = "$sh -c pwd" | |
b2fc9074 BF |
206 | } |
207 | } | |
208 | ||
fa52125f | 209 | my $found_pwd_cmd = defined($pwd_cmd); |
522b859a | 210 | unless ($pwd_cmd) { |
2d3da5df | 211 | # Isn't this wrong? _backtick_pwd() will fail if someone has |
889f7a4f RGS |
212 | # pwd in their path but it is not /bin/pwd or /usr/bin/pwd? |
213 | # See [perl #16774]. --jhi | |
214 | $pwd_cmd = 'pwd'; | |
522b859a | 215 | } |
3547aa9a | 216 | |
a9939470 NC |
217 | # Lazy-load Carp |
218 | sub _carp { require Carp; Carp::carp(@_) } | |
219 | sub _croak { require Carp; Carp::croak(@_) } | |
220 | ||
3547aa9a | 221 | # The 'natural and safe form' for UNIX (pwd may be setuid root) |
8b88ae92 | 222 | sub _backtick_pwd { |
027b7a30 AB |
223 | |
224 | # Localize %ENV entries in a way that won't create new hash keys. | |
225 | # Under AmigaOS we don't want to localize as it stops perl from | |
226 | # finding 'sh' in the PATH. | |
227 | my @localize = grep exists $ENV{$_}, qw(PATH IFS CDPATH ENV BASH_ENV) if $^O ne "amigaos"; | |
228 | local @ENV{@localize} if @localize; | |
f6342b4b | 229 | |
3547aa9a | 230 | my $cwd = `$pwd_cmd`; |
ac3b20cb | 231 | # Belt-and-suspenders in case someone said "undef $/". |
5cf6da5f | 232 | local $/ = "\n"; |
ac3b20cb | 233 | # `pwd` may fail e.g. if the disk is full |
7e03f963 | 234 | chomp($cwd) if defined $cwd; |
4633a7c4 | 235 | $cwd; |
8b88ae92 | 236 | } |
4633a7c4 LW |
237 | |
238 | # Since some ports may predefine cwd internally (e.g., NT) | |
239 | # we take care not to override an existing definition for cwd(). | |
240 | ||
09122b95 | 241 | unless ($METHOD_MAP{$^O}{cwd} or defined &cwd) { |
ea54c8bd | 242 | # The pwd command is not available in some chroot(2)'ed environments |
09122b95 | 243 | my $sep = $Config::Config{path_sep} || ':'; |
60598624 | 244 | my $os = $^O; # Protect $^O from tainting |
fa52125f SP |
245 | |
246 | ||
247 | # Try again to find a pwd, this time searching the whole PATH. | |
248 | if (defined $ENV{PATH} and $os ne 'MSWin32') { # no pwd on Windows | |
249 | my @candidates = split($sep, $ENV{PATH}); | |
250 | while (!$found_pwd_cmd and @candidates) { | |
251 | my $candidate = shift @candidates; | |
252 | $found_pwd_cmd = 1 if -x "$candidate/pwd"; | |
253 | } | |
254 | } | |
255 | ||
256 | # MacOS has some special magic to make `pwd` work. | |
257 | if( $os eq 'MacOS' || $found_pwd_cmd ) | |
73b801a6 | 258 | { |
ea54c8bd EC |
259 | *cwd = \&_backtick_pwd; |
260 | } | |
261 | else { | |
262 | *cwd = \&getcwd; | |
263 | } | |
264 | } | |
a0d0e21e | 265 | |
23bb49fa SP |
266 | if ($^O eq 'cygwin') { |
267 | # We need to make sure cwd() is called with no args, because it's | |
268 | # got an arg-less prototype and will die if args are present. | |
269 | local $^W = 0; | |
270 | my $orig_cwd = \&cwd; | |
271 | *cwd = sub { &$orig_cwd() } | |
272 | } | |
273 | ||
274 | ||
1f4f94f5 RS |
275 | # set a reasonable (and very safe) default for fastgetcwd, in case it |
276 | # isn't redefined later (20001212 rspier) | |
277 | *fastgetcwd = \&cwd; | |
748a9306 | 278 | |
c47834cd RGS |
279 | # A non-XS version of getcwd() - also used to bootstrap the perl build |
280 | # process, when miniperl is running and no XS loading happens. | |
a7a23d71 NC |
281 | sub _perl_getcwd |
282 | { | |
283 | abs_path('.'); | |
284 | } | |
285 | ||
a0c9c202 JH |
286 | # By John Bazik |
287 | # | |
288 | # Usage: $cwd = &fastcwd; | |
289 | # | |
290 | # This is a faster version of getcwd. It's also more dangerous because | |
291 | # you might chdir out of a directory that you can't chdir back into. | |
292 | ||
99f36a73 | 293 | sub fastcwd_ { |
a0c9c202 JH |
294 | my($odev, $oino, $cdev, $cino, $tdev, $tino); |
295 | my(@path, $path); | |
296 | local(*DIR); | |
297 | ||
298 | my($orig_cdev, $orig_cino) = stat('.'); | |
299 | ($cdev, $cino) = ($orig_cdev, $orig_cino); | |
300 | for (;;) { | |
301 | my $direntry; | |
302 | ($odev, $oino) = ($cdev, $cino); | |
303 | CORE::chdir('..') || return undef; | |
304 | ($cdev, $cino) = stat('.'); | |
305 | last if $odev == $cdev && $oino == $cino; | |
306 | opendir(DIR, '.') || return undef; | |
307 | for (;;) { | |
308 | $direntry = readdir(DIR); | |
309 | last unless defined $direntry; | |
310 | next if $direntry eq '.'; | |
311 | next if $direntry eq '..'; | |
312 | ||
313 | ($tdev, $tino) = lstat($direntry); | |
314 | last unless $tdev != $odev || $tino != $oino; | |
315 | } | |
316 | closedir(DIR); | |
317 | return undef unless defined $direntry; # should never happen | |
318 | unshift(@path, $direntry); | |
319 | } | |
320 | $path = '/' . join('/', @path); | |
321 | if ($^O eq 'apollo') { $path = "/".$path; } | |
322 | # At this point $path may be tainted (if tainting) and chdir would fail. | |
248785eb RGS |
323 | # Untaint it then check that we landed where we started. |
324 | $path =~ /^(.*)\z/s # untaint | |
325 | && CORE::chdir($1) or return undef; | |
a0c9c202 JH |
326 | ($cdev, $cino) = stat('.'); |
327 | die "Unstable directory path, current directory changed unexpectedly" | |
328 | if $cdev != $orig_cdev || $cino != $orig_cino; | |
329 | $path; | |
330 | } | |
99f36a73 | 331 | if (not defined &fastcwd) { *fastcwd = \&fastcwd_ } |
a0c9c202 JH |
332 | |
333 | ||
4633a7c4 | 334 | # Keeps track of current working directory in PWD environment var |
a0d0e21e LW |
335 | # Usage: |
336 | # use Cwd 'chdir'; | |
337 | # chdir $newdir; | |
338 | ||
4633a7c4 | 339 | my $chdir_init = 0; |
a0d0e21e | 340 | |
4633a7c4 | 341 | sub chdir_init { |
3b8e3443 | 342 | if ($ENV{'PWD'} and $^O ne 'os2' and $^O ne 'dos' and $^O ne 'MSWin32') { |
a0d0e21e LW |
343 | my($dd,$di) = stat('.'); |
344 | my($pd,$pi) = stat($ENV{'PWD'}); | |
345 | if (!defined $dd or !defined $pd or $di != $pi or $dd != $pd) { | |
4633a7c4 | 346 | $ENV{'PWD'} = cwd(); |
a0d0e21e LW |
347 | } |
348 | } | |
349 | else { | |
3b8e3443 GS |
350 | my $wd = cwd(); |
351 | $wd = Win32::GetFullPathName($wd) if $^O eq 'MSWin32'; | |
352 | $ENV{'PWD'} = $wd; | |
a0d0e21e | 353 | } |
4633a7c4 | 354 | # Strip an automounter prefix (where /tmp_mnt/foo/bar == /foo/bar) |
3b8e3443 | 355 | if ($^O ne 'MSWin32' and $ENV{'PWD'} =~ m|(/[^/]+(/[^/]+/[^/]+))(.*)|s) { |
a0d0e21e LW |
356 | my($pd,$pi) = stat($2); |
357 | my($dd,$di) = stat($1); | |
358 | if (defined $pd and defined $dd and $di == $pi and $dd == $pd) { | |
359 | $ENV{'PWD'}="$2$3"; | |
360 | } | |
361 | } | |
362 | $chdir_init = 1; | |
363 | } | |
364 | ||
365 | sub chdir { | |
22978713 | 366 | my $newdir = @_ ? shift : ''; # allow for no arg (chdir to HOME dir) |
faa5d6ec TC |
367 | if ($^O eq "cygwin") { |
368 | $newdir =~ s|\A///+|//|; | |
369 | $newdir =~ s|(?<=[^/])//+|/|g; | |
370 | } | |
371 | elsif ($^O ne 'MSWin32') { | |
372 | $newdir =~ s|///*|/|g; | |
373 | } | |
a0d0e21e | 374 | chdir_init() unless $chdir_init; |
4ffa1610 JH |
375 | my $newpwd; |
376 | if ($^O eq 'MSWin32') { | |
377 | # get the full path name *before* the chdir() | |
378 | $newpwd = Win32::GetFullPathName($newdir); | |
379 | } | |
380 | ||
4633a7c4 | 381 | return 0 unless CORE::chdir $newdir; |
4ffa1610 | 382 | |
3b8e3443 GS |
383 | if ($^O eq 'VMS') { |
384 | return $ENV{'PWD'} = $ENV{'DEFAULT'} | |
385 | } | |
4aecb5b5 JH |
386 | elsif ($^O eq 'MacOS') { |
387 | return $ENV{'PWD'} = cwd(); | |
388 | } | |
3b8e3443 | 389 | elsif ($^O eq 'MSWin32') { |
4ffa1610 | 390 | $ENV{'PWD'} = $newpwd; |
3b8e3443 GS |
391 | return 1; |
392 | } | |
748a9306 | 393 | |
e9475de8 SP |
394 | if (ref $newdir eq 'GLOB') { # in case a file/dir handle is passed in |
395 | $ENV{'PWD'} = cwd(); | |
396 | } elsif ($newdir =~ m#^/#s) { | |
a0d0e21e | 397 | $ENV{'PWD'} = $newdir; |
4633a7c4 LW |
398 | } else { |
399 | my @curdir = split(m#/#,$ENV{'PWD'}); | |
400 | @curdir = ('') unless @curdir; | |
401 | my $component; | |
a0d0e21e LW |
402 | foreach $component (split(m#/#, $newdir)) { |
403 | next if $component eq '.'; | |
404 | pop(@curdir),next if $component eq '..'; | |
405 | push(@curdir,$component); | |
406 | } | |
407 | $ENV{'PWD'} = join('/',@curdir) || '/'; | |
408 | } | |
4633a7c4 | 409 | 1; |
a0d0e21e LW |
410 | } |
411 | ||
a0c9c202 | 412 | |
99f36a73 | 413 | sub _perl_abs_path |
a0c9c202 JH |
414 | { |
415 | my $start = @_ ? shift : '.'; | |
416 | my($dotdots, $cwd, @pst, @cst, $dir, @tst); | |
417 | ||
418 | unless (@cst = stat( $start )) | |
419 | { | |
a9939470 | 420 | _carp("stat($start): $!"); |
a0c9c202 JH |
421 | return ''; |
422 | } | |
09122b95 RGS |
423 | |
424 | unless (-d _) { | |
425 | # Make sure we can be invoked on plain files, not just directories. | |
426 | # NOTE that this routine assumes that '/' is the only directory separator. | |
427 | ||
428 | my ($dir, $file) = $start =~ m{^(.*)/(.+)$} | |
429 | or return cwd() . '/' . $start; | |
430 | ||
275e8705 RGS |
431 | # Can't use "-l _" here, because the previous stat was a stat(), not an lstat(). |
432 | if (-l $start) { | |
09122b95 RGS |
433 | my $link_target = readlink($start); |
434 | die "Can't resolve link $start: $!" unless defined $link_target; | |
435 | ||
436 | require File::Spec; | |
437 | $link_target = $dir . '/' . $link_target | |
438 | unless File::Spec->file_name_is_absolute($link_target); | |
439 | ||
440 | return abs_path($link_target); | |
441 | } | |
442 | ||
99f36a73 | 443 | return $dir ? abs_path($dir) . "/$file" : "/$file"; |
09122b95 RGS |
444 | } |
445 | ||
a0c9c202 JH |
446 | $cwd = ''; |
447 | $dotdots = $start; | |
448 | do | |
449 | { | |
450 | $dotdots .= '/..'; | |
451 | @pst = @cst; | |
a25ef67d | 452 | local *PARENT; |
a0c9c202 JH |
453 | unless (opendir(PARENT, $dotdots)) |
454 | { | |
bf7c0a3d | 455 | # probably a permissions issue. Try the native command. |
cdce0d84 | 456 | require File::Spec; |
bf7c0a3d | 457 | return File::Spec->rel2abs( $start, _backtick_pwd() ); |
a0c9c202 JH |
458 | } |
459 | unless (@cst = stat($dotdots)) | |
460 | { | |
a9939470 | 461 | _carp("stat($dotdots): $!"); |
a0c9c202 JH |
462 | closedir(PARENT); |
463 | return ''; | |
464 | } | |
465 | if ($pst[0] == $cst[0] && $pst[1] == $cst[1]) | |
466 | { | |
467 | $dir = undef; | |
468 | } | |
469 | else | |
470 | { | |
471 | do | |
472 | { | |
473 | unless (defined ($dir = readdir(PARENT))) | |
474 | { | |
a9939470 | 475 | _carp("readdir($dotdots): $!"); |
a0c9c202 JH |
476 | closedir(PARENT); |
477 | return ''; | |
478 | } | |
479 | $tst[0] = $pst[0]+1 unless (@tst = lstat("$dotdots/$dir")) | |
480 | } | |
481 | while ($dir eq '.' || $dir eq '..' || $tst[0] != $pst[0] || | |
482 | $tst[1] != $pst[1]); | |
483 | } | |
484 | $cwd = (defined $dir ? "$dir" : "" ) . "/$cwd" ; | |
485 | closedir(PARENT); | |
486 | } while (defined $dir); | |
487 | chop($cwd) unless $cwd eq '/'; # drop the trailing / | |
488 | $cwd; | |
489 | } | |
490 | ||
491 | ||
3ee63918 | 492 | my $Curdir; |
96e4d5b1 | 493 | sub fast_abs_path { |
99f36a73 | 494 | local $ENV{PWD} = $ENV{PWD} || ''; # Guard against clobberage |
96e4d5b1 | 495 | my $cwd = getcwd(); |
4d6b4052 | 496 | require File::Spec; |
3ee63918 MS |
497 | my $path = @_ ? shift : ($Curdir ||= File::Spec->curdir); |
498 | ||
499 | # Detaint else we'll explode in taint mode. This is safe because | |
500 | # we're not doing anything dangerous with it. | |
9f28c638 JB |
501 | ($path) = $path =~ /(.*)/s; |
502 | ($cwd) = $cwd =~ /(.*)/s; | |
3ee63918 | 503 | |
09122b95 RGS |
504 | unless (-e $path) { |
505 | _croak("$path: No such file or directory"); | |
506 | } | |
507 | ||
508 | unless (-d _) { | |
509 | # Make sure we can be invoked on plain files, not just directories. | |
510 | ||
511 | my ($vol, $dir, $file) = File::Spec->splitpath($path); | |
512 | return File::Spec->catfile($cwd, $path) unless length $dir; | |
513 | ||
514 | if (-l $path) { | |
515 | my $link_target = readlink($path); | |
516 | die "Can't resolve link $path: $!" unless defined $link_target; | |
517 | ||
518 | $link_target = File::Spec->catpath($vol, $dir, $link_target) | |
519 | unless File::Spec->file_name_is_absolute($link_target); | |
520 | ||
521 | return fast_abs_path($link_target); | |
522 | } | |
523 | ||
d6802e43 | 524 | return $dir eq File::Spec->rootdir |
99f36a73 RGS |
525 | ? File::Spec->catpath($vol, $dir, $file) |
526 | : fast_abs_path(File::Spec->catpath($vol, $dir, '')) . '/' . $file; | |
09122b95 RGS |
527 | } |
528 | ||
e2ba406b | 529 | if (!CORE::chdir($path)) { |
a9939470 | 530 | _croak("Cannot chdir to $path: $!"); |
e2ba406b | 531 | } |
96e4d5b1 | 532 | my $realpath = getcwd(); |
e2ba406b | 533 | if (! ((-d $cwd) && (CORE::chdir($cwd)))) { |
a9939470 | 534 | _croak("Cannot chdir back to $cwd: $!"); |
e2ba406b | 535 | } |
96e4d5b1 | 536 | $realpath; |
8b88ae92 NIS |
537 | } |
538 | ||
e4c51978 GS |
539 | # added function alias to follow principle of least surprise |
540 | # based on previous aliasing. --tchrist 27-Jan-00 | |
541 | *fast_realpath = \&fast_abs_path; | |
542 | ||
4633a7c4 LW |
543 | |
544 | # --- PORTING SECTION --- | |
545 | ||
546 | # VMS: $ENV{'DEFAULT'} points to default directory at all times | |
bd3fa61c | 547 | # 06-Mar-1996 Charles Bailey bailey@newman.upenn.edu |
c6538b72 | 548 | # Note: Use of Cwd::chdir() causes the logical name PWD to be defined |
8b88ae92 NIS |
549 | # in the process logical name table as the default device and directory |
550 | # seen by Perl. This may not be the same as the default device | |
4633a7c4 LW |
551 | # and directory seen by DCL after Perl exits, since the effects |
552 | # the CRTL chdir() function persist only until Perl exits. | |
4633a7c4 LW |
553 | |
554 | sub _vms_cwd { | |
96e4d5b1 | 555 | return $ENV{'DEFAULT'}; |
556 | } | |
557 | ||
558 | sub _vms_abs_path { | |
559 | return $ENV{'DEFAULT'} unless @_; | |
61729915 | 560 | my $path = shift; |
9d7d9729 | 561 | |
53e80d0b JM |
562 | my $efs = _vms_efs; |
563 | my $unix_rpt = _vms_unix_rpt; | |
564 | ||
565 | if (defined &VMS::Filespec::vmsrealpath) { | |
566 | my $path_unix = 0; | |
567 | my $path_vms = 0; | |
568 | ||
569 | $path_unix = 1 if ($path =~ m#(?<=\^)/#); | |
570 | $path_unix = 1 if ($path =~ /^\.\.?$/); | |
571 | $path_vms = 1 if ($path =~ m#[\[<\]]#); | |
572 | $path_vms = 1 if ($path =~ /^--?$/); | |
573 | ||
574 | my $unix_mode = $path_unix; | |
575 | if ($efs) { | |
576 | # In case of a tie, the Unix report mode decides. | |
577 | if ($path_vms == $path_unix) { | |
578 | $unix_mode = $unix_rpt; | |
579 | } else { | |
580 | $unix_mode = 0 if $path_vms; | |
581 | } | |
582 | } | |
9d7d9729 | 583 | |
53e80d0b | 584 | if ($unix_mode) { |
bf7c0a3d | 585 | # Unix format |
53e80d0b | 586 | return VMS::Filespec::unixrealpath($path); |
bf7c0a3d SP |
587 | } |
588 | ||
589 | # VMS format | |
590 | ||
53e80d0b | 591 | my $new_path = VMS::Filespec::vmsrealpath($path); |
bf7c0a3d SP |
592 | |
593 | # Perl expects directories to be in directory format | |
594 | $new_path = VMS::Filespec::pathify($new_path) if -d $path; | |
595 | return $new_path; | |
596 | } | |
597 | ||
598 | # Fallback to older algorithm if correct ones are not | |
599 | # available. | |
600 | ||
53e80d0b JM |
601 | if (-l $path) { |
602 | my $link_target = readlink($path); | |
603 | die "Can't resolve link $path: $!" unless defined $link_target; | |
604 | ||
605 | return _vms_abs_path($link_target); | |
606 | } | |
607 | ||
61729915 CB |
608 | # may need to turn foo.dir into [.foo] |
609 | my $pathified = VMS::Filespec::pathify($path); | |
610 | $path = $pathified if defined $pathified; | |
611 | ||
96e4d5b1 | 612 | return VMS::Filespec::rmsexpand($path); |
4633a7c4 | 613 | } |
68dc0745 | 614 | |
4633a7c4 | 615 | sub _os2_cwd { |
3480fbaa DD |
616 | my $pwd = `cmd /c cd`; |
617 | chomp $pwd; | |
618 | $pwd =~ s:\\:/:g ; | |
619 | $ENV{'PWD'} = $pwd; | |
620 | return $pwd; | |
4633a7c4 LW |
621 | } |
622 | ||
8440aeb0 | 623 | sub _win32_cwd_simple { |
3480fbaa DD |
624 | my $pwd = `cd`; |
625 | chomp $pwd; | |
626 | $pwd =~ s:\\:/:g ; | |
627 | $ENV{'PWD'} = $pwd; | |
628 | return $pwd; | |
8440aeb0 | 629 | } |
630 | ||
96e4d5b1 | 631 | sub _win32_cwd { |
3480fbaa | 632 | my $pwd; |
8f1332ed | 633 | $pwd = Win32::GetCwd(); |
3480fbaa DD |
634 | $pwd =~ s:\\:/:g ; |
635 | $ENV{'PWD'} = $pwd; | |
636 | return $pwd; | |
96e4d5b1 | 637 | } |
638 | ||
8440aeb0 | 639 | *_NT_cwd = defined &Win32::GetCwd ? \&_win32_cwd : \&_win32_cwd_simple; |
68dc0745 | 640 | |
39e571d4 | 641 | sub _dos_cwd { |
3480fbaa | 642 | my $pwd; |
39e571d4 | 643 | if (!defined &Dos::GetCwd) { |
3480fbaa DD |
644 | chomp($pwd = `command /c cd`); |
645 | $pwd =~ s:\\:/:g ; | |
39e571d4 | 646 | } else { |
3480fbaa | 647 | $pwd = Dos::GetCwd(); |
39e571d4 | 648 | } |
3480fbaa DD |
649 | $ENV{'PWD'} = $pwd; |
650 | return $pwd; | |
55497cff | 651 | } |
652 | ||
7fbf1995 | 653 | sub _qnx_cwd { |
35b807ef NA |
654 | local $ENV{PATH} = ''; |
655 | local $ENV{CDPATH} = ''; | |
656 | local $ENV{ENV} = ''; | |
3480fbaa DD |
657 | my $pwd = `/usr/bin/fullpath -t`; |
658 | chomp $pwd; | |
659 | $ENV{'PWD'} = $pwd; | |
660 | return $pwd; | |
7fbf1995 NA |
661 | } |
662 | ||
663 | sub _qnx_abs_path { | |
35b807ef NA |
664 | local $ENV{PATH} = ''; |
665 | local $ENV{CDPATH} = ''; | |
666 | local $ENV{ENV} = ''; | |
fa921dc6 | 667 | my $path = @_ ? shift : '.'; |
39741d73 MS |
668 | local *REALPATH; |
669 | ||
99f36a73 | 670 | defined( open(REALPATH, '-|') || exec '/usr/bin/fullpath', '-t', $path ) or |
39741d73 MS |
671 | die "Can't open /usr/bin/fullpath: $!"; |
672 | my $realpath = <REALPATH>; | |
673 | close REALPATH; | |
674 | chomp $realpath; | |
7fbf1995 NA |
675 | return $realpath; |
676 | } | |
677 | ||
ed79a026 | 678 | sub _epoc_cwd { |
3480fbaa | 679 | return $ENV{'PWD'} = EPOC::getcwd(); |
ed79a026 OF |
680 | } |
681 | ||
4633a7c4 | 682 | |
09122b95 RGS |
683 | # Now that all the base-level functions are set up, alias the |
684 | # user-level functions to the right places | |
685 | ||
686 | if (exists $METHOD_MAP{$^O}) { | |
687 | my $map = $METHOD_MAP{$^O}; | |
688 | foreach my $name (keys %$map) { | |
99f36a73 | 689 | local $^W = 0; # assignments trigger 'subroutine redefined' warning |
09122b95 RGS |
690 | no strict 'refs'; |
691 | *{$name} = \&{$map->{$name}}; | |
692 | } | |
55497cff | 693 | } |
4633a7c4 | 694 | |
99f36a73 RGS |
695 | # In case the XS version doesn't load. |
696 | *abs_path = \&_perl_abs_path unless defined &abs_path; | |
a7a23d71 | 697 | *getcwd = \&_perl_getcwd unless defined &getcwd; |
99f36a73 RGS |
698 | |
699 | # added function alias for those of us more | |
700 | # used to the libc function. --tchrist 27-Jan-00 | |
701 | *realpath = \&abs_path; | |
4633a7c4 | 702 | |
a0d0e21e | 703 | 1; |
f4eedc6b DD |
704 | __END__ |
705 | ||
706 | =head1 NAME | |
707 | ||
708 | Cwd - get pathname of current working directory | |
709 | ||
710 | =head1 SYNOPSIS | |
711 | ||
712 | use Cwd; | |
713 | my $dir = getcwd; | |
714 | ||
715 | use Cwd 'abs_path'; | |
716 | my $abs_path = abs_path($file); | |
717 | ||
718 | =head1 DESCRIPTION | |
719 | ||
720 | This module provides functions for determining the pathname of the | |
721 | current working directory. It is recommended that getcwd (or another | |
722 | *cwd() function) be used in I<all> code to ensure portability. | |
723 | ||
724 | By default, it exports the functions cwd(), getcwd(), fastcwd(), and | |
725 | fastgetcwd() (and, on Win32, getdcwd()) into the caller's namespace. | |
726 | ||
727 | ||
728 | =head2 getcwd and friends | |
729 | ||
730 | Each of these functions are called without arguments and return the | |
731 | absolute path of the current working directory. | |
732 | ||
733 | =over 4 | |
734 | ||
735 | =item getcwd | |
736 | ||
737 | my $cwd = getcwd(); | |
738 | ||
739 | Returns the current working directory. | |
740 | ||
741 | Exposes the POSIX function getcwd(3) or re-implements it if it's not | |
742 | available. | |
743 | ||
744 | =item cwd | |
745 | ||
746 | my $cwd = cwd(); | |
747 | ||
748 | The cwd() is the most natural form for the current architecture. For | |
749 | most systems it is identical to `pwd` (but without the trailing line | |
750 | terminator). | |
751 | ||
752 | =item fastcwd | |
753 | ||
754 | my $cwd = fastcwd(); | |
755 | ||
756 | A more dangerous version of getcwd(), but potentially faster. | |
757 | ||
758 | It might conceivably chdir() you out of a directory that it can't | |
759 | chdir() you back into. If fastcwd encounters a problem it will return | |
760 | undef but will probably leave you in a different directory. For a | |
761 | measure of extra security, if everything appears to have worked, the | |
762 | fastcwd() function will check that it leaves you in the same directory | |
763 | that it started in. If it has changed it will C<die> with the message | |
764 | "Unstable directory path, current directory changed | |
765 | unexpectedly". That should never happen. | |
766 | ||
767 | =item fastgetcwd | |
768 | ||
769 | my $cwd = fastgetcwd(); | |
770 | ||
771 | The fastgetcwd() function is provided as a synonym for cwd(). | |
772 | ||
773 | =item getdcwd | |
774 | ||
775 | my $cwd = getdcwd(); | |
776 | my $cwd = getdcwd('C:'); | |
777 | ||
778 | The getdcwd() function is also provided on Win32 to get the current working | |
779 | directory on the specified drive, since Windows maintains a separate current | |
780 | working directory for each drive. If no drive is specified then the current | |
781 | drive is assumed. | |
782 | ||
783 | This function simply calls the Microsoft C library _getdcwd() function. | |
784 | ||
785 | =back | |
786 | ||
787 | ||
788 | =head2 abs_path and friends | |
789 | ||
790 | These functions are exported only on request. They each take a single | |
791 | argument and return the absolute pathname for it. If no argument is | |
792 | given they'll use the current working directory. | |
793 | ||
794 | =over 4 | |
795 | ||
796 | =item abs_path | |
797 | ||
798 | my $abs_path = abs_path($file); | |
799 | ||
800 | Uses the same algorithm as getcwd(). Symbolic links and relative-path | |
801 | components ("." and "..") are resolved to return the canonical | |
802 | pathname, just like realpath(3). | |
803 | ||
804 | =item realpath | |
805 | ||
806 | my $abs_path = realpath($file); | |
807 | ||
808 | A synonym for abs_path(). | |
809 | ||
810 | =item fast_abs_path | |
811 | ||
812 | my $abs_path = fast_abs_path($file); | |
813 | ||
814 | A more dangerous, but potentially faster version of abs_path. | |
815 | ||
816 | =back | |
817 | ||
818 | =head2 $ENV{PWD} | |
819 | ||
820 | If you ask to override your chdir() built-in function, | |
821 | ||
822 | use Cwd qw(chdir); | |
823 | ||
824 | then your PWD environment variable will be kept up to date. Note that | |
825 | it will only be kept up to date if all packages which use chdir import | |
826 | it from Cwd. | |
827 | ||
828 | ||
829 | =head1 NOTES | |
830 | ||
831 | =over 4 | |
832 | ||
833 | =item * | |
834 | ||
835 | Since the path separators are different on some operating systems ('/' | |
836 | on Unix, ':' on MacPerl, etc...) we recommend you use the File::Spec | |
837 | modules wherever portability is a concern. | |
838 | ||
839 | =item * | |
840 | ||
841 | Actually, on Mac OS, the C<getcwd()>, C<fastgetcwd()> and C<fastcwd()> | |
842 | functions are all aliases for the C<cwd()> function, which, on Mac OS, | |
843 | calls `pwd`. Likewise, the C<abs_path()> function is an alias for | |
844 | C<fast_abs_path()>. | |
845 | ||
846 | =back | |
847 | ||
848 | =head1 AUTHOR | |
849 | ||
850 | Originally by the perl5-porters. | |
851 | ||
852 | Maintained by Ken Williams <KWILLIAMS@cpan.org> | |
853 | ||
854 | =head1 COPYRIGHT | |
855 | ||
856 | Copyright (c) 2004 by the Perl 5 Porters. All rights reserved. | |
857 | ||
858 | This program is free software; you can redistribute it and/or modify | |
859 | it under the same terms as Perl itself. | |
860 | ||
861 | Portions of the C code in this library are copyright (c) 1994 by the | |
862 | Regents of the University of California. All rights reserved. The | |
863 | license on this code is compatible with the licensing of the rest of | |
864 | the distribution - please see the source code in F<Cwd.xs> for the | |
865 | details. | |
866 | ||
867 | =head1 SEE ALSO | |
868 | ||
869 | L<File::chdir> | |
870 | ||
871 | =cut |