Why does my Perl script remove characters from the file?

I have some issue with a Perl script. It modifies the content of a file, then reopen it to write it, and in the process some characters are lost. All words starting with '%' are deleted from the file. That's pretty annoying because the the % expressions are variable placeholders for dialog boxes.

Do you have any idea why? Source file is an XML with default encoding

Here is the code:

undef $/;
open F, $file or die "cannot open file $file\n";
my $content = <F>;                                           
close F;                                                     

$content =~s{status=["'][\w ]*["']\s*}{}gi;

printf $content;

open F, ">$file" or die "cannot reopen $file\n";             
printf F $content;                                           
close F or die "cannot close file $file\n";


You're using printf there and it thinks its first argument is a format string. See the printf documentation for details. When I run into this sort of problem, I always ensure that I'm using the functions correctly. :)

You probably want just print:

 print FILE $content;

In your example, you don't need to read in the entire file since your substitution does not cross lines. Instead of trying to read and write to the same filename all at once, use a temporary file:

open my($in),  "<", $file       or die "cannot open file $file\n";
open my($out), ">", "$file.bak" or die "cannot open file $file.bak\n";

while( <$in> )
    s{status=["'][\w ]*["']\s*}{}gi;
    print $out;

rename "$file.bak", $file or die "Could not rename file\n";

This also reduces to this command-line program:

% perl -pi.bak -e 's{status=["\']\\w ]*["\']\\s*}{}g' file

Need Your Help

setSize() not working?

java swing user-interface button

I have a program which takes two buttons, one that is regular and one that has a picture that changes depending on mouse roll over. Currently, since the picture is large, JButton custom is very lar...

About UNIX Resources Network

Original, collect and organize Developers related documents, information and materials, contains jQuery, Html, CSS, MySQL, .NET, ASP.NET, SQL, objective-c, iPhone, Ruby on Rails, C, SQL Server, Ruby, Arrays, Regex, ASP.NET MVC, WPF, XML, Ajax, DataBase, and so on.