## $Id: Listing.pm,v 1.1 1999/07/21 19:12:24 kraven Exp $package File::Listing;sub Version { $VERSION; }$VERSION = sprintf("%d.%02d", q$Revision: 1.1 $ =~ /(\d+)\.(\d+)/);=head1 NAMEparse_dir - parse directory listing=head1 SYNOPSIS use File::Listing; for (parse_dir(`ls -l`)) {     ($name, $type, $size, $mtime, $mode) = @$_;     next if $type ne 'f'; # plain file     #... } # directory listing can also be read from a file open(LISTING, "zcat ls-lR.gz|"); $dir = parse_dir(\*LISTING, '+0000');=head1 DESCRIPTIONThe parse_dir() routine can be used to parse directorylistings. Currently it only understand Unix C<'ls -l'> and C<'ls -lR'>format.  It should eventually be able to most things you might getback from a ftp server file listing (LIST command), i.e. VMS listings,NT listings, DOS listings,...The first parameter to parse_dir() is the directory listing to parse.It can be a scalar, a reference to an array of directory lines or aglob representing a filehandle to read the directory listing from.The second parameter is the time zone to use when parsing time stampsin the listing. If this value is undefined, then the local time zone isassumed.The third parameter is the type of listing to assume.  The values willbe strings like 'unix', 'vms', 'dos'.  Currently only 'unix' isimplemented and this is also the default value.  Ideally, the listingtype should be determined automatically.The fourth parameter specify how unparseable lines should be treated.Values can be 'ignore', 'warn' or a code reference.  Warn means thatthe perl warn() function will be called.  If a code reference ispassed, then this routine will be called and the return value from itwill be incorporated in the listing.  The default is 'ignore'.Only the first parameter is mandatory.  The parse_dir() prototype is($;$$$).The return value from parse_dir() is a list of directory entries.  Inscalar context the return value is a reference to the list.  Thedirectory entries are represented by an array consisting of [$filename, $filetype, $filesize, $filetime, $filemode ].  The$filetype value is one of the letters 'f', 'd', 'l' or '?'.  The$filetime value is converted to seconds since Jan 1, 1970.  The$filemode is a bitmask like the mode returned by stat().=head1 CREDITSBased on lsparse.pl (from Lee McLoughlin's ftp mirror package) andNet::FTP's parse_dir (Graham Barr).=cutrequire Exporter;@ISA = qw(Exporter);@EXPORT = qw(parse_dir);use strict;use Carp ();use HTTP::Date qw(str2time);sub parse_dir ($;$$$){   my($dir, $tz, $fstype, $error) = @_;   $fstype ||= 'unix';   $fstype = "File::Listing::" . lc $fstype;   my @args = $_[0];   push(@args, $tz) if(@_ >= 2);   push(@args, $error) if(@_ >= 4);   $fstype->parse(@args);}sub line { Carp::croak("Not implemented yet"); }sub init { } # Dummy subsub file_mode ($){    # This routine was originally borrowed from Graham Barr's    # Net::FTP package.    local $_ = shift;    my $mode = 0;    my($type,$ch);    s/^(.)// and $type = $1;    while (/(.)/g) {	$mode <<= 1;	$mode |= 1 if $1 ne "-" &&		      $1 ne 'S' &&		      $1 ne 't' &&		      $1 ne 'T';    }    $type eq "d" and $mode |= 0040000 or	# Directory      $type eq "l" and $mode |= 0120000 or	# Symbolic Link	$mode |= 0100000;			# Regular File    $mode |= 0004000 if /^...s....../i;    $mode |= 0002000 if /^......s.../i;    $mode |= 0001000 if /^.........t/i;    $mode;}sub parse{   my($pkg, $dir, $tz, $error) = @_;   # First let's try to determine what kind of dir parameter we have   # received.  We allow both listings, reference to arrays and   # file handles to read from.   if (ref($dir) eq 'ARRAY') {       # Already splitted up   } elsif (ref($dir) eq 'GLOB') {       # A file handle   } elsif (ref($dir)) {      Carp::croak("Illegal argument to parse_dir()");   } elsif ($dir =~ /^\*\w+(::\w+)+$/) {      # This scalar looks like a file handle, so we assume it is   } else {      # A normal scalar listing      $dir = [ split(/\n/, $dir) ];   }   $pkg->init();   my @files = ();   if (ref($dir) eq 'ARRAY') {       for (@$dir) {	   push(@files, $pkg->line($_, $tz, $error));       }   } else {       local($_);       while (<$dir>) {	   chomp;	   push(@files, $pkg->line($_, $tz, $error));       }   }   wantarray ? @files : \@files;}package File::Listing::unix;use HTTP::Date qw(str2time);# A place to remember current directory from last line parsed.use vars qw($curdir);no strict qw(vars);@ISA = qw(File::Listing);sub init{    $curdir = '';}sub line{    shift; # package name    local($_) = shift;    my($tz, $error) = @_;    s/\015//g;    #study;    my ($kind, $size, $date, $name);    if (($kind, $size, $date, $name) =	/^([\-FlrwxsStTdD]{10})                   # Type and permission bits	 .*                                       # Graps	 \D(\d+)                                  # File size	 \s+                                      # Some space	 (\w{3}\s+\d+\s+(?:\d{1,2}:\d{2}|\d{4}))  # Date	 \s+                                      # Some more space	 (.*)$                                    # File name	/x )    {	return if $name eq '.' || $name eq '..';	$name = "$curdir/$name" if length $curdir;	my $type = '?';	if ($kind =~ /^l/ && $name =~ /(.*) -> (.*)/ ) {	    $name = $1;	    $type = "l $2";	} elsif ($kind =~ /^[\-F]/) { # (hopefully) a regular file	    $type = 'f';	} elsif ($kind =~ /^[dD]/) {	    $type = 'd';	    $size = undef;  # Don't believe the reported size	}	return [$name, $type, $size, str2time($date, $tz),               File::Listing::file_mode($kind)];    } elsif (/^(.+):$/ && !/^[dcbsp].*\s.*\s.*:$/ ) {	my $dir = $1;	return () if $dir eq '.';	$curdir = $dir;	return ();    } elsif (/^[Tt]otal\s+(\d+)$/ || /^\s*$/) {	return ();    } elsif (/not found/    || # OSF1, HPUX, and SunOS return             # "$file not found"             /No such file/ || # IRIX returns             # "UX:ls: ERROR: Cannot access $file: No such file or directory"                               # Solaris returns             # "$file: No such file or directory"             /cannot find/     # Windows NT returns             # "The system cannot find the path specified."             ) {	return () unless defined $error;	&$error($_) if ref($error) eq 'CODE';	warn "Error: $_\n" if $error eq 'warn';	return ();    } elsif ($_ eq '') {       # AIX, and Linux return nothing	return () unless defined $error;	&$error("No such file or directory") if ref($error) eq 'CODE';	warn "Warning: No such file or directory\n" if $error eq 'warn';	return ();    } else {        # parse failed, check if the dosftp parse understands it        return(File::Listing::dosftp->line($_,$tz,$error));    }}package File::Listing::dosftp;use HTTP::Date qw(str2time);# A place to remember current directory from last line parsed.use vars qw($curdir);no strict qw(vars);@ISA = qw(File::Listing);sub init{    $curdir = '';}sub line{    shift; # package name    local($_) = shift;    my($tz, $error) = @_;    s/\015//g;    my ($kind, $size, $date, $name);    # 02-05-96  10:48AM                 1415 src.slf    # 09-10-96  09:18AM       <DIR>          sl_util    if (($date,$size_or_dir,$name) =        /^(\d\d-\d\d-\d\d\s+\d\d:\d\d\wM)         # Date and time info         \s+                                      # Some space         (<\w{3}>|\d+)                            # Dir or Size         \s+                                      # Some more space         (.+)$                                    # File name        /x )    {	return if $name eq '.' || $name eq '..';	$name = "$curdir/$name" if length $curdir;	my $type = '?';	if ($size_or_dir eq '<DIR>') {	    $type = "d";            $size = ""; # directories have no size in the pc listing        } else {	    $type = 'f';            $size = $size_or_dir;	}	return [$name, $type, $size, str2time($date, $tz),              File::Listing::file_mode($kind)];    } else {	return () unless defined $error;	&$error($_) if ref($error) eq 'CODE';	warn "Can't parse: $_\n" if $error eq 'warn';	return ();    }}package File::Listing::vms;@File::Listing::unix::ISA = qw(File::Listing);package File::Listing::netware;@File::Listing::unix::ISA = qw(File::Listing);1;