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  • What is the current state of Perl 6?

    - by Cobalt
    What is the current state of Perl 6, is it production-ready? Where do we stand right now? There are many programmers curious about the current progress of Perl 6. There are also two other topics open on on reddit and http://perlmonks.org/?node_id=835419 about this.

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  • XSLT Stylesheet works with a vbs script, but not Perl

    - by user2472274
    I have a program that is essentially a search application, and it exists in both VBScript and Perl form (I'm trying to make an executable with a GUI). Currently the search application outputs an HTML file, and if a section of text in the HTML is longer than twelve lines then it hides anything after that and includes a clickable More... tag. This is done in XSLT and works with VBScript. I literally copied and pasted the stylesheet into the Perl program that I'm using and it does everything right except for the More... tag. Is there any reason why it would be working with the VBScript but not Perl? I'm using XML::LibXSLT in the Perl script, and here is the template that is supposed to be creating the More... tag <xsl:template name="more"> <xsl:param name="text"/> <xsl:param name="row-id"/> <xsl:param name="cycle" select="1"/> <xsl:choose> <xsl:when test="($cycle &gt; 12) and contains($text,'&#13;')"> <span class="show" onclick="showID('SHOW{$row-id}');style.display = 'none';">More...</span> <span class="hidden" id="SHOW{$row-id}"> <xsl:call-template name="highlight"> <xsl:with-param name="text" select="$text"/> </xsl:call-template> </span> </xsl:when> <xsl:when test="contains($text,'&#13;')"> <xsl:call-template name="highlight"> <xsl:with-param name="text" select="substring-before($text,'&#13;')"/> </xsl:call-template> <xsl:text>&#13;</xsl:text> <xsl:call-template name="more"> <xsl:with-param name="text" select="substring-after($text,'&#13;')"/> <xsl:with-param name="row-id" select="$row-id"/> <xsl:with-param name="cycle" select="$cycle + 1"/> </xsl:call-template> </xsl:when> <xsl:otherwise> <xsl:call-template name="highlight"> <xsl:with-param name="text" select="$text"/> </xsl:call-template> </xsl:otherwise> </xsl:choose> </xsl:template>

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  • perl sorting an array of hashes

    - by srk
    use strict; my @arr; $arr[0][0]{5} = 16; $arr[0][1]{6} = 11; $arr[0][2]{7} = 25; $arr[0][3]{8} = 31; $arr[0][4]{9} = 16; $arr[0][5]{10} = 17; sort the array based on hash values so this should change to $arr[0][0]{6} = 11; $arr[0][1]{9} = 16; $arr[0][2]{5} = 16; $arr[0][3]{10} = 17; $arr[0][4]{7} = 25; $arr[0][5]{8} = 31; first sort on values in the hash.. when the values are same reverse sort based on keys... Please tell me how to do this.. Thank you

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  • Centos 6.3 PERL CGI selinux file read access

    - by Steed
    I have a CGI script called index.cgi It is trying to read a log file called 10.128.0.242.2012.sep.20.downloaded.txt under the path /var/log/trafcount/ It appears that it is being blocked by selinux. The audit log shows something like type=AVC msg=audit(1348158321.873:1472116): avc: denied { read } for pid=11620 comm="index.cgi" name="10.128.0.242.2012.sep.20.downloaded.txt" dev=dm-0 ino=395264 scontext=unconfined_u:system_r:httpd_sys_script_t:s0 tcontext=unconfined_u:object_r:var_log_t:s0 tclass=file How can I allow this script full access to all files under /var/log/trafcount ?

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  • No package rrdtool-perl available

    - by Pentium10
    On a CentOS release 5.10 (Final) I am trying to install rrdtool to get RRDs.pm but I have no luck. yum install rrdtool-perl Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * rpmforge: mirror.team-cymru.org Excluding Packages in global exclude list Finished Setting up Install Process No package rrdtool-perl available. Nothing to do I tried also librrds-perl but that was not found either. 2. I tried: yum whatprovides "*/RRDs.pm" Loaded plugins: fastestmirror Loading mirror speeds from cached hostfile * rpmforge: mirror.team-cymru.org Excluding Packages in global exclude list Finished cpanel-perl-514-Log-Log4perl-1.37-1.cp1136.x86_64 : CPAN module - Log4j implementation for Perl Repo : installed Matched from: Filename : /usr/local/cpanel/3rdparty/perl/514/lib64/perl5/cpanel_lib/Log/Log4perl/Appender/RRDs.pm cpanel-perl-514-RRDs-v1.4.7-1.cp1136.x86_64 : CPAN module - unknown Repo : installed Matched from: Filename : /usr/local/cpanel/3rdparty/perl/514/lib64/perl5/cpanel_lib/x86_64-linux-64int/RRDs.pm then I tried installing but I got: No package cpanel-perl available and the variants (tried with full name, tried both repos listed)

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  • Need help on awk/sed/ perl pattern with regex / grep

    - by Jayakumar K
    Sample file output from grep file1:my $dbh = DBI->connect("dbi:mysql:$database_name", $DB_USER, $DB_PASSWD) file2:($dbc,$rc) = mysql_connect($mysql_host,$mysql_user,$mysql_password); The awk pattern should get values databasename, DB_USER And DB_PASSWD from line 1 and mysql_host,mysql_user and mysql_password from line 2 i.e all variables inside the function. Then it should search for the declaration of that variable in file before : (semicolon) ex: databasename in file1 may be $databasename = "dbweb" ; ex: mysql_user in file2 may be $mysql_user="root" ; Result: It should display variable declarations of all 6 variables along with filenames file2:$mysql_host = "db1"; file2:$mysql_user = "root"; file1:$DB_USER = 'user';

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  • perl + shell script + remove all not uniq lines except the first line uniq (FILE NAME) + perl in she

    - by yael
    hi I have the following file How to remove by sed all FILE NAME lines except the first uniq FILE NAME For example need to remove all FILE NAME lines from the file except the first: FILE NAME: /dir1/dir2/dir3/dir4/dir5/file FILE NAME: /dirA/dirB/dirC/dirD/dirE/file the file: FILE NAME: /dir1/dir2/dir3/dir4/dir5/file PARAMETER NAME: blablabla TARGET FILE: 12 SOURCE FILE: 565 FILE NAME: /dir1/dir2/dir3/dir4/dir5/file PARAMETER NAME: blablabla TARGET FILE: 18 SOURCE FILE: 552 FILE NAME: /dir1/dir2/dir3/dir4/dir5/file PARAMETER NAME: blablabla TARGET FILE: 14 SOURCE FILE: 559 FILE NAME: /dirA/dirB/dirC/dirD/dirE/file PARAMETER NAME: blablabla TARGET FILE: 134 SOURCE FILE: 344 FILE NAME: /dirA/dirB/dirC/dirD/dirE/file PARAMETER NAME: blablabla TARGET FILE: 13 SOURCE FILE: 445 FILE NAME: /dirA/dirB/dirC/dirD/dirE/file PARAMETER NAME: blablabla TARGET FILE: 13

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  • what might cause a print error in perl?

    - by Mark J Seger
    I have a long running script that every hour opens a file, prints to it and closes the file. I've recently found very rarely, the print is failing, not because I'm testing the status of the print itself but rather due to the fact of missing entries in the file until the system is actually rebooted! I do trap for file open failures and write a message to syslog when that happens and I'm not seeing any open failures so I'm now guessing it may be the print that is failing. I'm not trapping the print failures, which I suspect most people don't but am now going to update that one print. Meanwhile, my question is does anyone know what types of situations could cause a print statement to fail when there is plenty of disk storage and no contention for a file which has been successfully opened in append mode?

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  • How do I make a shortcut for a Perl program under Windows using a DOS batch file?

    - by Micah
    I'm trying to "hide" some of my perl program from the end user to make things easier on them. I'm doing what I can to keep them out of the command prompt. The program itself has a GUI designed in Perl/Tk, so they don't have to worry about the command prompt. Could I write out a quick batch file that goes along the lines of: START perl 'C:\[some path here]\myscript.pl' with START to start a program, the perl interpretor as my program, and the path/name of my perl script as the parameter? Would I have to specify where to find perl or would Windows just know because perl is in the computer's PATH variable? Thanks for the help!

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  • Making a shortcut for a Perl program under Windows using a DOS batch file.

    - by Micah
    I'm trying to "hide" some of my perl program from the end user to make things easier on them. I'm doing what I can to keep them out of the command prompt. The program itself has a GUI designed in Perl/Tk, so they don't have to worry about the command prompt. Could I write out a quick batch file that goes along the lines of: START perl 'C:\[some path here]\myscript.pl' with START to start a program, the perl interpretor as my program, and the path/name of my perl script as the parameter? Would I have to specify where to find perl or would Windows just know because perl is in the computer's PATH variable? Thanks for the help!

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  • Do different versions of Perl require different CPAN module installations?

    - by Leonard
    We have a server farm that we are slowly migrating to a new version of Perl (5.12.1). We are currently running 5.8.5. The OS will be upgraded from RedHat 4 to RedHat 5 as well, but RedHat 5 is still back on Perl 5.8.8. Thus for a while in our source tree we'll be supporting two versions of Perl. I have been told to install the new version of Perl into our source tree, and also all of the CPAN modules we currently use. I was actualy told to 'compile' the modules with the correct version of Perl. I'm confused by this. Do some modules actually configure themselves differently for different versions of Perl? Given this, I assume I should configure a CPAN directory for each version of Perl in our tree? Any information or 'gotchas' about this scenario?

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  • Perl unpack in list context

    - by drewk
    A common 'Perlism' is generating a list as something to loop over in this form: for($str=~/./g) { print "the next character from \"$str\"=$_\n"; } In this case the global match regex returns a list that is one character in turn from the string $str, and assigns that value to $_ Instead of a regex, split can be used in the same way or 'a'..'z', map, etc. I am investigating unpack to generate a field by field interpretation of a string. I have always found unpack to be less straightforward to the way my brain works, and I have never really dug that deeply into it. As a simple case, I want to generate a list that is one character in each element from a string using unpack (yes -- I know I can do it with split(//,$str) and /./g but I really want to see if unpack can be used this way...) Obviously, I can use a field list for unpack that is unpack("A1" x length($str), $str) but is there some other way that kinda looks like globbing? ie, can I call unpack(some_format,$str) either in list context or in a loop such that unpack will return the next group of character in the format group until $str is exausted? I have read The Perl 5.12 Pack pod and the Perl 5.12 pack tutorial and the Perkmonks tutorial Here is the sample code: #!/usr/bin/perl use warnings; use strict; my $str=join('',('a'..'z', 'A'..'Z')); #the alphabet... $str=~s/(.{1,3})/$1 /g; #...in groups of three print "str=$str\n\n"; for ($str=~/./g) { print "regex: = $_\n"; } for(split(//,$str)) { print "split: \$_=$_\n"; } for(unpack("A1" x length($str), $str)) { print "unpack: \$_=$_\n"; }

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  • perl threading problem

    - by Alice Wozownik
    I'm writing a multithreaded website uptime checker in perl, and here is the basic code so far (includes only threading part): !/usr/bin/perl use LWP::UserAgent; use Getopt::Std; use threads; use threads::shared; my $maxthreads :shared = 50; my $threads :shared = 0; print "Website Uptime Checker\n"; my $infilename = $ARGV[0]; chomp($infilename); open(INFILE, $infilename); my $outfilename = $ARGV[1]; chomp($outfilename); open(OUTFILE, "" . $outfilename); OUTFILE-autoflush(1); while ($site = ) { chomp($site); while (1) { if ($threads < $maxthreads) { $threads++; my $thr = threads-create(\&check_site, $site); $thr-detach(); last; } else { sleep(1); } } } while ($threads 0) { sleep(1); } sub check_site { $server = $_[0]; print "$server\n"; $threads--; } It gives an error after a while: Can't call method "detach" on an undefined value at C:\perl\webchecker.pl line 28, line 245. What causes this error? I know it is at detach, but what am I doing wrong in my code? Windows shows lots of free memory, so it should not be the computer running out of memory, this error occurs even if I set $maxthreads as low as 10 or possibly even lower.

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  • Hidden features of Perl?

    - by Adam Bellaire
    What are some really useful but esoteric language features in Perl that you've actually been able to employ to do useful work? Guidelines: Try to limit answers to the Perl core and not CPAN Please give an example and a short description Hidden Features also found in other languages' Hidden Features: (These are all from Corion's answer) C# Duff's Device Portability and Standardness Quotes for whitespace delimited lists and strings Aliasable namespaces Java Static Initalizers JavaScript Functions are First Class citizens Block scope and closure Calling methods and accessors indirectly through a variable Ruby Defining methods through code PHP Pervasive online documentation Magic methods Symbolic references Python One line value swapping Ability to replace even core functions with your own functionality Other Hidden Features: Operators: The bool quasi-operator The flip-flop operator Also used for list construction The ++ and unary - operators work on strings The repetition operator The spaceship operator The || operator (and // operator) to select from a set of choices The diamond operator Special cases of the m// operator The tilde-tilde "operator" Quoting constructs: The qw operator Letters can be used as quote delimiters in q{}-like constructs Quoting mechanisms Syntax and Names: There can be a space after a sigil You can give subs numeric names with symbolic references Legal trailing commas Grouped Integer Literals hash slices Populating keys of a hash from an array Modules, Pragmas, and command-line options: use strict and use warnings Taint checking Esoteric use of -n and -p CPAN overload::constant IO::Handle module Safe compartments Attributes Variables: Autovivification The $[ variable tie Dynamic Scoping Variable swapping with a single statement Loops and flow control: Magic goto for on a single variable continue clause Desperation mode Regular expressions: The \G anchor (?{}) and '(??{})` in regexes Other features: The debugger Special code blocks such as BEGIN, CHECK, and END The DATA block New Block Operations Source Filters Signal Hooks map (twice) Wrapping built-in functions The eof function The dbmopen function Turning warnings into errors Other tricks, and meta-answers: cat files, decompressing gzips if needed Perl Tips See Also: Hidden features of C Hidden features of C# Hidden features of C++ Hidden features of Java Hidden features of JavaScript Hidden features of Ruby Hidden features of PHP Hidden features of Python

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  • Perl DBI doesn't work with Oracle 11g

    - by John
    I am getting the following error connecting to an Oracle 11g database using a simple perl script: failed: ERROR OCIEnvNlsCreate. Check ORACLE_HOME (Linux) env var or PATH (Windows) and or NLS settings, permissions, etc. at The script is as follows: #!/usr/local/bin/perl use strict; use DBI; if ($#ARGV < 3) { print "Usage: perl testDbAccess.pl dataBaseUser dataBasePassword SID dataBasePort\n"; exit 0; } my ($user, $pwd, $sid, $port) = @ARGV; my $host = `hostname`; my $dbh; my $sth; my $dbname = "dbi:Oracle:HOST=$host;SID=$sid;PORT=$port"; openDbConnection(); closeDbConnection(); sub openDbConnection() { $dbh = DBI->connect ($dbname, $user ,$pwd , { RaiseError => 1}) || die "Database connection not made: $DBI::errstr"; } sub closeDbConnection() { #$sth->finish(); $dbh->disconnect(); } Anyone seen this problem before? /john

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  • How to Create PDF from HTML using perl

    - by Octopus
    I need to create a PDF file from the html I have created usign rrdcgi. This page contains the details and graphs in png format. I have written the below code using perl module HTML::HTMLDoc to create a pdf file using saved html file. The images are of size width 1048 and hight 266 but when creating a pdf file the images are not shown completly from the right side. #!/usr/bin/perl use strict; use warnings; use HTML::HTMLDoc; my $filename = shift; my $htmldoc = new HTML::HTMLDoc(); $htmldoc->set_input_file($filename); $htmldoc->no_links(); $htmldoc->landscape(); $htmldoc->set_jpeg_compression('50'); $htmldoc->best_image_quality(); $htmldoc->color_on(); $htmldoc->set_right_margin('1', 'mm'); $htmldoc->set_left_margin('1', 'mm'); $htmldoc->set_bodycolor('#FFFFFF'); $htmldoc->set_browserwidth('1000'); my $pdf = $htmldoc->generate_pdf(); print $pdf->to_string(); $pdf->to_file('foo.pdf'); I need help on following items: 1) How to display the complete image on page. 2) How to set a link on html page to create pdf file with the contents on the current page. Any help with the perl code would be really appreciated.

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  • How to include Perl into shtml files

    - by Bilzac
    Hi I am trying to include a perl script within my shtml file. Unfortunately when I do my script doesnt seem to run but instead it just displays the content of the script. The code I am using is as follows: test.shtml: <html> <title> business home page </title> <body> </br> <!--#echo var="DATE_LOCAL" --> <br /> <!--#include virtual="hello.pl"--> </body> </html> hello.pl: #!C:/Sun/WebServer6.1/bin/https/perl/perl print "Content-type:text/html\n\n"; print "Hello World!"; I am not sure what I am doing wrong. Incase you all wanted to know the server I am using is Sun One WebServer 6.1 (OS = Windows XP). Thanks for your responses!

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  • DB2 with mod_perl not working, works fine in CGI

    - by Matthew
    Hi, I'm having issues with getting DBI's IBM DB2 driver to work with mod_perl. My test script is: #!/usr/bin/perl use CGI; use Data::Dumper; use DBI; $q = CGI->new; print $q->header; print $q->start_html(); $dsn = "DBI:DB2:SAMPLE"; $username = "username"; $password = "password"; $dbc = DBI->connect($dsn, $username, $password); $sth = $dbc->prepare("SELECT * FROM SOME_TABLE WHERE FIELD='SOMETHING'"); $sth->execute(); $row = $sth->fetchrow_hashref(); print "<pre>".$q->escapeHTML(Dumper($row))."</pre>"; print $q->end_html; This script works as CGI but not under mod_perl. I get this error in apache's error log: DBD::DB2::dr connect warning: [unixODBC][Driver Manager]Data source name not found, and no default driver specified at /usr/lib/perl5/site_perl/5.8.8/Apache/DBI.pm line 190. DBI connect('SAMPLE','username',...) failed: [unixODBC][Driver Manager]Data source name not found, and no default driver specified at /data/www/perl/test.pl line 15 First of all, why is it using ODBC? The native DB2 driver is installed (hence it works as CGI). Running Apache 2.2.3, mod_perl 2.0.4 under RHEL5. This guy had the same problem as me: http://www.mail-archive.com/[email protected]/msg22909.html But I have no idea how he fixed it. What does mod_php4 have to do with mod_perl? Any help would be greatly appreciated, I'm having no luck with google.

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  • how to include .pl (PERL) file in PHP

    - by dexter
    i have two pages one in php(index.php) and another one in Perl(dbcon.pl). basically i want my php file to show only the UI and all the data operations would be done in Perl file. i have tried in index.pl <?php include("dbcon.pl");?> <html> <br/>PHP</br> </html> and dbcon.pl has #!/usr/bin/perl use strict; use warnings; use DBI; use CGI::Simple; my $cgi = CGI::Simple->new; my $dsn = sprintf('DBI:mysql:database=%s;host=%s','dbname','localhost'); my $dbh = DBI->connect($dsn,root =>'',{AutoCommit => 0,RaisError=> 0}); my $sql= "SELECT * FROM products"; my $sth =$dbh->prepare($sql); $sth->execute or die "SQL Error: $DBI::errstr\n"; while (my @row = $sth->fetchrow_array){ print $cgi->header, <<html; <div>&nbsp;@row[0]&nbsp;@row[1]&nbsp;@row[2]&nbsp;@row[3]&nbsp;@row[4]</div> html } but when i run index.php in browser it prints all the code in dbcon.pl file instead of executing it how to overcome this problem? note: i am running this in windows environment is there any other way to do this?

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  • perl multiple tasks problem

    - by Alice Wozownik
    I have finished my earlier multithreaded program that uses perl threads and it works on my system. The problem is that on some systems that it needs to run on, thread support is not compiled into perl and I cannot install additional packages. I therefore need to use something other than threads, and I am moving my code to using fork(). This works on my windows system in starting the subtasks. A few problems: How to determine when the child process exits? I created new threads when the thread count was below a certain value, I need to keep track of how many threads are running. For processes, how do I know when one exits so I can keep track of how many exist at the time, incrementing a counter when one is created and decrementing when one exits? Is file I/O using handles obtained with OPEN when opened by the parent process safe in the child process? I need to append to a file for each of the child processes, is this safe on unix as well. Is there any alternative to fork and threads? I tried use Parallel::ForkManager, but that isn't installed on my system (use Parallel::ForkManager; gave an error) and I absolutely require that my perl script work on all unix/windows systems without installing any additional modules.

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  • perl dynamic path given to 'use lib'

    - by Ed Hyer
    So, my code (Perl scripts and Perl modules) sits in a tree like this: trunk/ util/ process/ scripts/ The 'util' directory has, well, utilities, that things in the 'process/' dir need. They get access like this: use FindBin; use lib "$FindBin::Bin/../util"; use UtilityModule qw(all); That construct doesn't care where you start, as long as you're at the same level in the tree as "util/". But I decided that 'scripts/' was getting too crowded, so I created scripts/scripts1 scripts/scripts2 Now I see that this doesn't work. If I run a script 'trunk/scripts/scripts1/call_script.pl', and it calls '/trunk/process/process_script.pl', then 'process_script.pl' will fail trying to get the routines from UtilityModule(), because the path that FindBin returns is the path of the top-level calling script. The first ten ways I thought of to solve this all involved something like: use lib $path_that_came_from_elsewhere; but that seems to be something Perl doesn't like to do, except via that FindBin trick. I tried some things involving BEGIN{} blocks, but i don't really know what I'm doing there, and will likely just end up refactoring. But if someone has some clever insight into this type of problem, this would be a good chance to earn some points!

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  • Embedding Perl Interpreter

    - by cam
    Hi, just downloaded ActivePerl. I want to embed the perl interpreter in a C# application (or at least call the perl interpreter from C#). I need to be able to send send out data to Perl from C#, then receive the output back into C#. I just installed ActivePerl, and added MS Script Control 1.0 as a reference. I found this code on the internet, but am having trouble getting it to work. MSScriptControl.ScriptControlClass Interpreter = new MSScriptControl.ScriptControlClass(); Interpreter.Language = @"ActivePerl"; string Program = @"reverse 'abcde'"; string Results = (string)Interpreter.Eval(Program); return Results; Originally, it had 'PerlScript' instead of 'ActivePerl', but neither work for me. I'm not entirely sure what Interpreter.Language expects. Does it require the path to the interpreter? Solved... I'm not sure how, but when I changed it back to PerlScript it works now. Still, I would like to know if MSScript Control is using ActivePerl or another interpreter.

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  • Perl, share package variable without Export

    - by Mike
    I'm creating a group of Perl scripts, and I would like to have one package store a group of constants. I don't want to export them using Exporter because there will be quite a few and I don't want to pollute the namespace. Since there will be so many, I don't want to require the user to be forced to manually specify which they will be using. I think the best way to just use the packagename::var syntax, however it doesn't seem to be working as I expect it to. I illustrate this problem in the below code This is settings.pm, the module that will hold the global settings #!/usr/bin/perl #settings.pm use strict; use warnings; package settings; our $foo="hello world"; 1; Below is the main script #!/usr/bin/perl #script.pl use strict; use warnings; use settings; print settings::$foo; It gives this error message instead or printing hello world Bad name after settings:: at ./script.pl line 8.

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