You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
283 lines
9.2 KiB
283 lines
9.2 KiB
package File::Basename;
|
|
|
|
=head1 NAME
|
|
|
|
fileparse - split a pathname into pieces
|
|
|
|
basename - extract just the filename from a path
|
|
|
|
dirname - extract just the directory from a path
|
|
|
|
=head1 SYNOPSIS
|
|
|
|
use File::Basename;
|
|
|
|
($name,$path,$suffix) = fileparse($fullname,@suffixlist)
|
|
fileparse_set_fstype($os_string);
|
|
$basename = basename($fullname,@suffixlist);
|
|
$dirname = dirname($fullname);
|
|
|
|
($name,$path,$suffix) = fileparse("lib/File/Basename.pm","\.pm");
|
|
fileparse_set_fstype("VMS");
|
|
$basename = basename("lib/File/Basename.pm",".pm");
|
|
$dirname = dirname("lib/File/Basename.pm");
|
|
|
|
=head1 DESCRIPTION
|
|
|
|
These routines allow you to parse file specifications into useful
|
|
pieces using the syntax of different operating systems.
|
|
|
|
=over 4
|
|
|
|
=item fileparse_set_fstype
|
|
|
|
You select the syntax via the routine fileparse_set_fstype().
|
|
|
|
If the argument passed to it contains one of the substrings
|
|
"VMS", "MSDOS", "MacOS", "AmigaOS" or "MSWin32", the file specification
|
|
syntax of that operating system is used in future calls to
|
|
fileparse(), basename(), and dirname(). If it contains none of
|
|
these substrings, Unix syntax is used. This pattern matching is
|
|
case-insensitive. If you've selected VMS syntax, and the file
|
|
specification you pass to one of these routines contains a "/",
|
|
they assume you are using Unix emulation and apply the Unix syntax
|
|
rules instead, for that function call only.
|
|
|
|
If the argument passed to it contains one of the substrings "VMS",
|
|
"MSDOS", "MacOS", "AmigaOS", "os2", "MSWin32" or "RISCOS", then the pattern
|
|
matching for suffix removal is performed without regard for case,
|
|
since those systems are not case-sensitive when opening existing files
|
|
(though some of them preserve case on file creation).
|
|
|
|
If you haven't called fileparse_set_fstype(), the syntax is chosen
|
|
by examining the builtin variable C<$^O> according to these rules.
|
|
|
|
=item fileparse
|
|
|
|
The fileparse() routine divides a file specification into three
|
|
parts: a leading B<path>, a file B<name>, and a B<suffix>. The
|
|
B<path> contains everything up to and including the last directory
|
|
separator in the input file specification. The remainder of the input
|
|
file specification is then divided into B<name> and B<suffix> based on
|
|
the optional patterns you specify in C<@suffixlist>. Each element of
|
|
this list is interpreted as a regular expression, and is matched
|
|
against the end of B<name>. If this succeeds, the matching portion of
|
|
B<name> is removed and prepended to B<suffix>. By proper use of
|
|
C<@suffixlist>, you can remove file types or versions for examination.
|
|
|
|
You are guaranteed that if you concatenate B<path>, B<name>, and
|
|
B<suffix> together in that order, the result will denote the same
|
|
file as the input file specification.
|
|
|
|
=back
|
|
|
|
=head1 EXAMPLES
|
|
|
|
Using Unix file syntax:
|
|
|
|
($base,$path,$type) = fileparse('/virgil/aeneid/draft.book7',
|
|
'\.book\d+');
|
|
|
|
would yield
|
|
|
|
$base eq 'draft'
|
|
$path eq '/virgil/aeneid/',
|
|
$type eq '.book7'
|
|
|
|
Similarly, using VMS syntax:
|
|
|
|
($name,$dir,$type) = fileparse('Doc_Root:[Help]Rhetoric.Rnh',
|
|
'\..*');
|
|
|
|
would yield
|
|
|
|
$name eq 'Rhetoric'
|
|
$dir eq 'Doc_Root:[Help]'
|
|
$type eq '.Rnh'
|
|
|
|
=over
|
|
|
|
=item C<basename>
|
|
|
|
The basename() routine returns the first element of the list produced
|
|
by calling fileparse() with the same arguments, except that it always
|
|
quotes metacharacters in the given suffixes. It is provided for
|
|
programmer compatibility with the Unix shell command basename(1).
|
|
|
|
=item C<dirname>
|
|
|
|
The dirname() routine returns the directory portion of the input file
|
|
specification. When using VMS or MacOS syntax, this is identical to the
|
|
second element of the list produced by calling fileparse() with the same
|
|
input file specification. (Under VMS, if there is no directory information
|
|
in the input file specification, then the current default device and
|
|
directory are returned.) When using Unix or MSDOS syntax, the return
|
|
value conforms to the behavior of the Unix shell command dirname(1). This
|
|
is usually the same as the behavior of fileparse(), but differs in some
|
|
cases. For example, for the input file specification F<lib/>, fileparse()
|
|
considers the directory name to be F<lib/>, while dirname() considers the
|
|
directory name to be F<.>).
|
|
|
|
=back
|
|
|
|
=cut
|
|
|
|
|
|
## use strict;
|
|
# 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; } ' }
|
|
import re 'taint';
|
|
}
|
|
|
|
|
|
|
|
use 5.005_64;
|
|
our(@ISA, @EXPORT, $VERSION, $Fileparse_fstype, $Fileparse_igncase);
|
|
require Exporter;
|
|
@ISA = qw(Exporter);
|
|
@EXPORT = qw(fileparse fileparse_set_fstype basename dirname);
|
|
$VERSION = "2.6";
|
|
|
|
|
|
# fileparse_set_fstype() - specify OS-based rules used in future
|
|
# calls to routines in this package
|
|
#
|
|
# Currently recognized values: VMS, MSDOS, MacOS, AmigaOS, os2, RISCOS
|
|
# Any other name uses Unix-style rules and is case-sensitive
|
|
|
|
sub fileparse_set_fstype {
|
|
my @old = ($Fileparse_fstype, $Fileparse_igncase);
|
|
if (@_) {
|
|
$Fileparse_fstype = $_[0];
|
|
$Fileparse_igncase = ($_[0] =~ /^(?:MacOS|VMS|AmigaOS|os2|RISCOS|MSWin32|MSDOS)/i);
|
|
}
|
|
wantarray ? @old : $old[0];
|
|
}
|
|
|
|
# fileparse() - parse file specification
|
|
#
|
|
# Version 2.4 27-Sep-1996 Charles Bailey [email protected]
|
|
|
|
|
|
sub fileparse {
|
|
my($fullname,@suffices) = @_;
|
|
my($fstype,$igncase) = ($Fileparse_fstype, $Fileparse_igncase);
|
|
my($dirpath,$tail,$suffix,$basename);
|
|
my($taint) = substr($fullname,0,0); # Is $fullname tainted?
|
|
|
|
if ($fstype =~ /^VMS/i) {
|
|
if ($fullname =~ m#/#) { $fstype = '' } # We're doing Unix emulation
|
|
else {
|
|
($dirpath,$basename) = ($fullname =~ /^(.*[:>\]])?(.*)/s);
|
|
$dirpath ||= ''; # should always be defined
|
|
}
|
|
}
|
|
if ($fstype =~ /^MS(DOS|Win32)|epoc/i) {
|
|
($dirpath,$basename) = ($fullname =~ /^((?:.*[:\\\/])?)(.*)/s);
|
|
$dirpath .= '.\\' unless $dirpath =~ /[\\\/]\z/;
|
|
}
|
|
elsif ($fstype =~ /^MacOS/si) {
|
|
($dirpath,$basename) = ($fullname =~ /^(.*:)?(.*)/s);
|
|
}
|
|
elsif ($fstype =~ /^AmigaOS/i) {
|
|
($dirpath,$basename) = ($fullname =~ /(.*[:\/])?(.*)/s);
|
|
$dirpath = './' unless $dirpath;
|
|
}
|
|
elsif ($fstype !~ /^VMS/i) { # default to Unix
|
|
($dirpath,$basename) = ($fullname =~ m#^(.*/)?(.*)#s);
|
|
if ($^O 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 = $devspec.$dirpath;
|
|
}
|
|
$dirpath = './' unless $dirpath;
|
|
}
|
|
|
|
if (@suffices) {
|
|
$tail = '';
|
|
foreach $suffix (@suffices) {
|
|
my $pat = ($igncase ? '(?i)' : '') . "($suffix)\$";
|
|
if ($basename =~ s/$pat//s) {
|
|
$taint .= substr($suffix,0,0);
|
|
$tail = $1 . $tail;
|
|
}
|
|
}
|
|
}
|
|
|
|
$tail .= $taint if defined $tail; # avoid warning if $tail == undef
|
|
wantarray ? ($basename . $taint, $dirpath . $taint, $tail)
|
|
: $basename . $taint;
|
|
}
|
|
|
|
|
|
# basename() - returns first element of list returned by fileparse()
|
|
|
|
sub basename {
|
|
my($name) = shift;
|
|
(fileparse($name, map("\Q$_\E",@_)))[0];
|
|
}
|
|
|
|
|
|
# dirname() - returns device and directory portion of file specification
|
|
# Behavior matches that of Unix dirname(1) exactly for Unix and MSDOS
|
|
# filespecs except for names ending with a separator, e.g., "/xx/yy/".
|
|
# This differs from the second element of the list returned
|
|
# by fileparse() in that the trailing '/' (Unix) or '\' (MSDOS) (and
|
|
# the last directory name if the filespec ends in a '/' or '\'), is lost.
|
|
|
|
sub dirname {
|
|
my($basename,$dirname) = fileparse($_[0]);
|
|
my($fstype) = $Fileparse_fstype;
|
|
|
|
if ($fstype =~ /VMS/i) {
|
|
if ($_[0] =~ m#/#) { $fstype = '' }
|
|
else { return $dirname || $ENV{DEFAULT} }
|
|
}
|
|
if ($fstype =~ /MacOS/i) {
|
|
if( !length($basename) && $dirname !~ /^[^:]+:\z/) {
|
|
$dirname =~ s/([^:]):\z/$1/s;
|
|
($basename,$dirname) = fileparse $dirname;
|
|
}
|
|
$dirname .= ":" unless $dirname =~ /:\z/;
|
|
}
|
|
elsif ($fstype =~ /MSDOS/i) {
|
|
$dirname =~ s/([^:])[\\\/]*\z/$1/;
|
|
unless( length($basename) ) {
|
|
($basename,$dirname) = fileparse $dirname;
|
|
$dirname =~ s/([^:])[\\\/]*\z/$1/;
|
|
}
|
|
}
|
|
elsif ($fstype =~ /MSWin32/i) {
|
|
$dirname =~ s/([^:])[\\\/]*\z/$1/;
|
|
unless( length($basename) ) {
|
|
($basename,$dirname) = fileparse $dirname;
|
|
$dirname =~ s/([^:])[\\\/]*\z/$1/;
|
|
}
|
|
}
|
|
elsif ($fstype =~ /AmigaOS/i) {
|
|
if ( $dirname =~ /:\z/) { return $dirname }
|
|
chop $dirname;
|
|
$dirname =~ s#[^:/]+\z## unless length($basename);
|
|
}
|
|
else {
|
|
$dirname =~ s:(.)/*\z:$1:s;
|
|
unless( length($basename) ) {
|
|
local($File::Basename::Fileparse_fstype) = $fstype;
|
|
($basename,$dirname) = fileparse $dirname;
|
|
$dirname =~ s:(.)/*\z:$1:s;
|
|
}
|
|
}
|
|
|
|
$dirname;
|
|
}
|
|
|
|
fileparse_set_fstype $^O;
|
|
|
|
1;
|