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Top Forums Shell Programming and Scripting PERL question Post 84815 by cbkihong on Wednesday 28th of September 2005 08:55:18 PM
Old 09-28-2005
Quote:
Originally Posted by jerardfjay
Its exactly what I was looking for. Although I understand the piece where you concatenate the string "COMMENT ;" to the existing lines after filtering unwanted lines, what is the logic that you are using to filter the lines that start with PKZIP,Copyright and Viewing?
There's no trick. Just find the line that contains "Length" and process those thereafter, so a sed run will do the same trick.

But a warning though. The routine will not notice if the command fails for whatever reason. Maybe you will want to check $? (if pkzipc obeys so) for return value, e.g.

Code:
$out = `pkzipc test.zip`;
if ($? >> 8) {
    # error (assume non-zero return status is error)
}

As a sidenote, did you try the Archive::Zip module (of course you will need to download and install it)? It seems to let you retrieve such information programmatically:

http://search.cpan.org/~smpeters/Arc...mple_accessors
 

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Archive::Zip::MemberRead(3)				User Contributed Perl Documentation			       Archive::Zip::MemberRead(3)

NAME
Archive::Zip::MemberRead - A wrapper that lets you read Zip archive members as if they were files. SYNOPSIS
use Archive::Zip; use Archive::Zip::MemberRead; $zip = Archive::Zip->new("file.zip"); $fh = Archive::Zip::MemberRead->new($zip, "subdir/abc.txt"); while (defined($line = $fh->getline())) { print $fh->input_line_number . "#: $line "; } $read = $fh->read($buffer, 32*1024); print "Read $read bytes as :$buffer: "; DESCRIPTION
The Archive::Zip::MemberRead module lets you read Zip archive member data just like you read data from files. METHODS
Archive::Zip::Member::readFileHandle() You can get a "Archive::Zip::MemberRead" from an archive member by calling "readFileHandle()": my $member = $zip->memberNamed('abc/def.c'); my $fh = $member->readFileHandle(); while (defined($line = $fh->getline())) { # ... } $fh->close(); Archive::Zip::MemberRead->new($zip, $fileName) Archive::Zip::MemberRead->new($zip, $member) Archive::Zip::MemberRead->new($member) Construct a new Archive::Zip::MemberRead on the specified member. my $fh = Archive::Zip::MemberRead->new($zip, 'fred.c') setLineEnd(expr) Set the line end character to use. This is set to by default except on Windows systems where it is set to . You will only need to set this on systems which are not Windows or Unix based and require a line end different from . This is a class method so call as "Archive::Zip::MemberRead"->"setLineEnd($nl)" rewind() Rewinds an "Archive::Zip::MemberRead" so that you can read from it again starting at the beginning. input_record_separator(expr) If the argument is given, input_record_separator for this instance is set to it. The current setting (which may be the global $/) is always returned. input_line_number() Returns the current line number, but only if you're using "getline()". Using "read()" will not update the line number. close() Closes the given file handle. buffer_size([ $size ]) Gets or sets the buffer size used for reads. Default is the chunk size used by Archive::Zip. getline() Returns the next line from the currently open member. Makes sense only for text files. A read error is considered fatal enough to die. Returns undef on eof. All subsequent calls would return undef, unless a rewind() is called. Note: The line returned has the input_record_separator (default: newline) removed. getline( { preserve_line_ending => 1 } ) Returns the next line including the line ending. read($buffer, $num_bytes_to_read) Simulates a normal "read()" system call. Returns the no. of bytes read. "undef" on error, 0 on eof, e.g.: $fh = Archive::Zip::MemberRead->new($zip, "sreeji/secrets.bin"); while (1) { $read = $fh->read($buffer, 1024); die "FATAL ERROR reading my secrets ! " if (!defined($read)); last if (!$read); # Do processing. .... } AUTHOR
Sreeji K. Das <sreeji_k@yahoo.com> See Archive::Zip by Ned Konz without which this module does not make any sense! Minor mods by Ned Konz. COPYRIGHT
Copyright 2002 Sreeji K. Das. This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself. perl v5.18.2 2014-01-08 Archive::Zip::MemberRead(3)
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