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-=head1 NAME
-
-File::Basename - Parse file paths into directory, filename and suffix.
-
-=head1 SYNOPSIS
-
- use File::Basename;
-
- ($name,$path,$suffix) = fileparse($fullname,@suffixlist);
- $name = fileparse($fullname,@suffixlist);
-
- $basename = basename($fullname,@suffixlist);
- $dirname = dirname($fullname);
-
-
-=head1 DESCRIPTION
-
-These routines allow you to parse file paths into their directory, filename
-and suffix.
-
-B<NOTE>: C<dirname()> and C<basename()> emulate the behaviours, and
-quirks, of the shell and C functions of the same name. See each
-function's documentation for details. If your concern is just parsing
-paths it is safer to use L<File::Spec>'s C<splitpath()> and
-C<splitdir()> methods.
-
-It is guaranteed that
-
- # Where $path_separator is / for Unix, \ for Windows, etc...
- dirname($path) . $path_separator . basename($path);
-
-is equivalent to the original path for all systems but VMS.
-
-
-=cut
-
-
-package File::Basename;
-
-# A bit of juggling to insure that C<use re 'taint';> always works, since
-# File::Basename is used during the Perl build, when the re extension may
-# not be available.
-BEGIN {
- unless (eval { require re; })
- { eval ' sub re::import { $^H |= 0x00100000; } ' } # HINT_RE_TAINT
- import re 'taint';
-}
-
-
-use strict;
-use 5.006;
-use warnings;
-our(@ISA, @EXPORT, $VERSION, $Fileparse_fstype, $Fileparse_igncase);
-require Exporter;
-@ISA = qw(Exporter);
-@EXPORT = qw(fileparse fileparse_set_fstype basename dirname);
-$VERSION = "2.74";
-
-fileparse_set_fstype($^O);
-
-
-=over 4
-
-=item C<fileparse>
-
- my($filename, $directories, $suffix) = fileparse($path);
- my($filename, $directories, $suffix) = fileparse($path, @suffixes);
- my $filename = fileparse($path, @suffixes);
-
-The C<fileparse()> routine divides a file path into its $directories, $filename
-and (optionally) the filename $suffix.
-
-$directories contains everything up to and including the last
-directory separator in the $path including the volume (if applicable).
-The remainder of the $path is the $filename.
-
- # On Unix returns ("baz", "/foo/bar/", "")
- fileparse("/foo/bar/baz");
-
- # On Windows returns ("baz", "C:\foo\bar\", "")
- fileparse("C:\foo\bar\baz");
-
- # On Unix returns ("", "/foo/bar/baz/", "")
- fileparse("/foo/bar/baz/");
-
-If @suffixes are given each element is a pattern (either a string or a
-C<qr//>) matched against the end of the $filename. The matching
-portion is removed and becomes the $suffix.
-
- # On Unix returns ("baz", "/foo/bar", ".txt")
- fileparse("/foo/bar/baz", qr/\.[^.]*/);
-
-If type is non-Unix (see C<fileparse_set_fstype()>) then the pattern
-matching for suffix removal is performed case-insensitively, since
-those systems are not case-sensitive when opening existing files.
-
-You are guaranteed that C<$directories . $filename . $suffix> will
-denote the same location as the original $path.
-
-=cut
-
-
-sub fileparse {
- my($fullname,@suffices) = @_;
-
- unless (defined $fullname) {
- require Carp;
- Carp::croak("fileparse(): need a valid pathname");
- }
-
- my $orig_type = '';
- my($type,$igncase) = ($Fileparse_fstype, $Fileparse_igncase);
-
- my($taint) = substr($fullname,0,0); # Is $fullname tainted?
-
- if ($type eq "VMS" and $fullname =~ m{/} ) {
- # We're doing Unix emulation
- $orig_type = $type;
- $type = 'Unix';
- }
-
- my($dirpath, $basename);
-
- if (grep { $type eq $_ } qw(MSDOS DOS MSWin32 Epoc)) {
- ($dirpath,$basename) = ($fullname =~ /^((?:.*[:\\\/])?)(.*)/s);
- $dirpath .= '.\\' unless $dirpath =~ /[\\\/]\z/;
- }
- elsif ($type eq "OS2") {
- ($dirpath,$basename) = ($fullname =~ m#^((?:.*[:\\/])?)(.*)#s);
- $dirpath = './' unless $dirpath; # Can't be 0
- $dirpath .= '/' unless $dirpath =~ m#[\\/]\z#;
- }
- elsif ($type eq "MacOS") {
- ($dirpath,$basename) = ($fullname =~ /^(.*:)?(.*)/s);
- $dirpath = ':' unless $dirpath;
- }
- elsif ($type eq "AmigaOS") {
- ($dirpath,$basename) = ($fullname =~ /(.*[:\/])?(.*)/s);
- $dirpath = './' unless $dirpath;
- }
- elsif ($type eq 'VMS' ) {
- ($dirpath,$basename) = ($fullname =~ /^(.*[:>\]])?(.*)/s);
- $dirpath ||= ''; # should always be defined
- }
- else { # Default to Unix semantics.
- ($dirpath,$basename) = ($fullname =~ m#^(.*/)?(.*)#s);
- if ($orig_type eq 'VMS' and $fullname =~ m:^(/[^/]+/000000(/|$))(.*):) {
- # dev:[000000] is top of VMS tree, similar to Unix '/'
- # so strip it off and treat the rest as "normal"
- my $devspec = $1;
- my $remainder = $3;
- ($dirpath,$basename) = ($remainder =~ m#^(.*/)?(.*)#s);
- $dirpath ||= ''; # should always be defined
- $dirpath = $devspec.$dirpath;
- }
- $dirpath = './' unless $dirpath;
- }
-
-
- my $tail = '';
- my $suffix = '';
- if (@suffices) {
- foreach $suffix (@suffices) {
- my $pat = ($igncase ? '(?i)' : '') . "($suffix)\$";
- if ($basename =~ s/$pat//s) {
- $taint .= substr($suffix,0,0);
- $tail = $1 . $tail;
- }
- }
- }
-
- # Ensure taint is propgated from the path to its pieces.
- $tail .= $taint;
- wantarray ? ($basename .= $taint, $dirpath .= $taint, $tail)
- : ($basename .= $taint);
-}
-
-
-
-=item C<basename>
-
- my $filename = basename($path);
- my $filename = basename($path, @suffixes);
-
-This function is provided for compatibility with the Unix shell command
-C<basename(1)>. It does B<NOT> always return the file name portion of a
-path as you might expect. To be safe, if you want the file name portion of
-a path use C<fileparse()>.
-
-C<basename()> returns the last level of a filepath even if the last
-level is clearly directory. In effect, it is acting like C<pop()> for
-paths. This differs from C<fileparse()>'s behaviour.
-
- # Both return "bar"
- basename("/foo/bar");
- basename("/foo/bar/");
-
-@suffixes work as in C<fileparse()> except all regex metacharacters are
-quoted.
-
- # These two function calls are equivalent.
- my $filename = basename("/foo/bar/baz.txt", ".txt");
- my $filename = fileparse("/foo/bar/baz.txt", qr/\Q.txt\E/);
-
-Also note that in order to be compatible with the shell command,
-C<basename()> does not strip off a suffix if it is identical to the
-remaining characters in the filename.
-
-=cut
-
-
-sub basename {
- my($path) = shift;
-
- # From BSD basename(1)
- # The basename utility deletes any prefix ending with the last slash `/'
- # character present in string (after first stripping trailing slashes)
- _strip_trailing_sep($path);
-
- my($basename, $dirname, $suffix) = fileparse( $path, map("\Q$_\E",@_) );
-
- # From BSD basename(1)
- # The suffix is not stripped if it is identical to the remaining
- # characters in string.
- if( length $suffix and !length $basename ) {
- $basename = $suffix;
- }
-
- # Ensure that basename '/' == '/'
- if( !length $basename ) {
- $basename = $dirname;
- }
-
- return $basename;
-}
-
-
-
-=item C<dirname>
-
-This function is provided for compatibility with the Unix shell
-command C<dirname(1)> and has inherited some of its quirks. In spite of
-its name it does B<NOT> always return the directory name as you might
-expect. To be safe, if you want the directory name of a path use
-C<fileparse()>.
-
-Only on VMS (where there is no ambiguity between the file and directory
-portions of a path) and AmigaOS (possibly due to an implementation quirk in
-this module) does C<dirname()> work like C<fileparse($path)>, returning just the
-$directories.
-
- # On VMS and AmigaOS
- my $directories = dirname($path);
-
-When using Unix or MSDOS syntax this emulates the C<dirname(1)> shell function
-which is subtly different from how C<fileparse()> works. It returns all but
-the last level of a file path even if the last level is clearly a directory.
-In effect, it is not returning the directory portion but simply the path one
-level up acting like C<chop()> for file paths.
-
-Also unlike C<fileparse()>, C<dirname()> does not include a trailing slash on
-its returned path.
-
- # returns /foo/bar. fileparse() would return /foo/bar/
- dirname("/foo/bar/baz");
-
- # also returns /foo/bar despite the fact that baz is clearly a
- # directory. fileparse() would return /foo/bar/baz/
- dirname("/foo/bar/baz/");
-
- # returns '.'. fileparse() would return 'foo/'
- dirname("foo/");
-
-Under VMS, if there is no directory information in the $path, then the
-current default device and directory is used.
-
-=cut
-
-
-sub dirname {
- my $path = shift;
-
- my($type) = $Fileparse_fstype;
-
- if( $type eq 'VMS' and $path =~ m{/} ) {
- # Parse as Unix
- local($File::Basename::Fileparse_fstype) = '';
- return dirname($path);
- }
-
- my($basename, $dirname) = fileparse($path);
-
- if ($type eq 'VMS') {
- $dirname ||= $ENV{DEFAULT};
- }
- elsif ($type eq 'MacOS') {
- if( !length($basename) && $dirname !~ /^[^:]+:\z/) {
- _strip_trailing_sep($dirname);
- ($basename,$dirname) = fileparse $dirname;
- }
- $dirname .= ":" unless $dirname =~ /:\z/;
- }
- elsif (grep { $type eq $_ } qw(MSDOS DOS MSWin32 OS2)) {
- _strip_trailing_sep($dirname);
- unless( length($basename) ) {
- ($basename,$dirname) = fileparse $dirname;
- _strip_trailing_sep($dirname);
- }
- }
- elsif ($type eq 'AmigaOS') {
- if ( $dirname =~ /:\z/) { return $dirname }
- chop $dirname;
- $dirname =~ s#[^:/]+\z## unless length($basename);
- }
- else {
- _strip_trailing_sep($dirname);
- unless( length($basename) ) {
- ($basename,$dirname) = fileparse $dirname;
- _strip_trailing_sep($dirname);
- }
- }
-
- $dirname;
-}
-
-
-# Strip the trailing path separator.
-sub _strip_trailing_sep {
- my $type = $Fileparse_fstype;
-
- if ($type eq 'MacOS') {
- $_[0] =~ s/([^:]):\z/$1/s;
- }
- elsif (grep { $type eq $_ } qw(MSDOS DOS MSWin32 OS2)) {
- $_[0] =~ s/([^:])[\\\/]*\z/$1/;
- }
- else {
- $_[0] =~ s{(.)/*\z}{$1}s;
- }
-}
-
-
-=item C<fileparse_set_fstype>
-
- my $type = fileparse_set_fstype();
- my $previous_type = fileparse_set_fstype($type);
-
-Normally File::Basename will assume a file path type native to your current
-operating system (ie. /foo/bar style on Unix, \foo\bar on Windows, etc...).
-With this function you can override that assumption.
-
-Valid $types are "MacOS", "VMS", "AmigaOS", "OS2", "RISCOS",
-"MSWin32", "DOS" (also "MSDOS" for backwards bug compatibility),
-"Epoc" and "Unix" (all case-insensitive). If an unrecognized $type is
-given "Unix" will be assumed.
-
-If you've selected VMS syntax, and the file specification you pass to
-one of these routines contains a "/", they assume you are using Unix
-emulation and apply the Unix syntax rules instead, for that function
-call only.
-
-=back
-
-=cut
-
-
-BEGIN {
-
-my @Ignore_Case = qw(MacOS VMS AmigaOS OS2 RISCOS MSWin32 MSDOS DOS Epoc);
-my @Types = (@Ignore_Case, qw(Unix));
-
-sub fileparse_set_fstype {
- my $old = $Fileparse_fstype;
-
- if (@_) {
- my $new_type = shift;
-
- $Fileparse_fstype = 'Unix'; # default
- foreach my $type (@Types) {
- $Fileparse_fstype = $type if $new_type =~ /^$type/i;
- }
-
- $Fileparse_igncase =
- (grep $Fileparse_fstype eq $_, @Ignore_Case) ? 1 : 0;
- }
-
- return $old;
-}
-
-}
-
-
-1;
-
-
-=head1 SEE ALSO
-
-L<dirname(1)>, L<basename(1)>, L<File::Spec>