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PERLUTIL(1)			 Perl Programmers Reference Guide		      PERLUTIL(1)

NAME
       perlutil - utilities packaged with the Perl distribution

DESCRIPTION
       Along with the Perl interpreter itself, the Perl distribution installs a range of utili-
       ties on your system. There are also several utilities which are used by the Perl distribu-
       tion itself as part of the install process. This document exists to list all of these
       utilities, explain what they are for and provide pointers to each module's documentation,
       if appropriate.

       DOCUMENTATION

       perldoc
	  The main interface to Perl's documentation is "perldoc", although if you're reading
	  this, it's more than likely that you've already found it. perldoc will extract and for-
	  mat the documentation from any file in the current directory, any Perl module installed
	  on the system, or any of the standard documentation pages, such as this one. Use "perl-
	  doc <name>" to get information on any of the utilities described in this document.

       pod2man and pod2text
	  If it's run from a terminal, perldoc will usually call pod2man to translate POD (Plain
	  Old Documentation - see perlpod for an explanation) into a manpage, and then run man to
	  display it; if man isn't available, pod2text will be used instead and the output piped
	  through your favourite pager.

       pod2html and pod2latex
	  As well as these two, there are two other converters: pod2html will produce HTML pages
	  from POD, and pod2latex, which produces LaTeX files.

       pod2usage
	  If you just want to know how to use the utilities described here, pod2usage will just
	  extract the "USAGE" section; some of the utilities will automatically call pod2usage on
	  themselves when you call them with "-help".

       podselect
	  pod2usage is a special case of podselect, a utility to extract named sections from doc-
	  uments written in POD. For instance, while utilities have "USAGE" sections, Perl mod-
	  ules usually have "SYNOPSIS" sections: "podselect -s "SYNOPSIS" ..." will extract this
	  section for a given file.

       podchecker
	  If you're writing your own documentation in POD, the podchecker utility will look for
	  errors in your markup.

       splain
	  splain is an interface to perldiag - paste in your error message to it, and it'll
	  explain it for you.

       roffitall
	  The "roffitall" utility is not installed on your system but lives in the pod/ directory
	  of your Perl source kit; it converts all the documentation from the distribution to
	  *roff format, and produces a typeset PostScript or text file of the whole lot.

       CONVERTORS

       To help you convert legacy programs to Perl, we've included three conversion filters:

       a2p
	  a2p converts awk scripts to Perl programs; for example, "a2p -F:" on the simple awk
	  script "{print $2}" will produce a Perl program based around this code:

	      while (<>) {
		  ($Fld1,$Fld2) = split(/[:\n]/, $_, 9999);
		  print $Fld2;
	      }

       s2p
	  Similarly, s2p converts sed scripts to Perl programs. s2p run on "s/foo/bar" will pro-
	  duce a Perl program based around this:

	      while (<>) {
		  chomp;
		  s/foo/bar/g;
		  print if $printit;
	      }

       find2perl
	  Finally, find2perl translates "find" commands to Perl equivalents which use the
	  File::Find module. As an example, "find2perl . -user root -perm 4000 -print" produces
	  the following callback subroutine for "File::Find":

	      sub wanted {
		  my ($dev,$ino,$mode,$nlink,$uid,$gid);
		  (($dev,$ino,$mode,$nlink,$uid,$gid) = lstat($_)) &&
		  $uid == $uid{'root'}) &&
		  (($mode & 0777) == 04000);
		  print("$name\n");
	      }

       As well as these filters for converting other languages, the pl2pm utility will help you
       convert old-style Perl 4 libraries to new-style Perl5 modules.

       Administration

       libnetcfg
	  To display and change the libnet configuration run the libnetcfg command.

       Development

       There are a set of utilities which help you in developing Perl programs, and in particu-
       lar, extending Perl with C.

       perlbug
	  perlbug is the recommended way to report bugs in the perl interpreter itself or any of
	  the standard library modules back to the developers; please read through the documenta-
	  tion for perlbug thoroughly before using it to submit a bug report.

       h2ph
	  Back before Perl had the XS system for connecting with C libraries, programmers used to
	  get library constants by reading through the C header files. You may still see "require
	  'syscall.ph'" or similar around - the .ph file should be created by running h2ph on the
	  corresponding .h file. See the h2ph documentation for more on how to convert a whole
	  bunch of header files at once.

       c2ph and pstruct
	  c2ph and pstruct, which are actually the same program but behave differently depending
	  on how they are called, provide another way of getting at C with Perl - they'll convert
	  C structures and union declarations to Perl code. This is deprecated in favour of h2xs
	  these days.

       h2xs
	  h2xs converts C header files into XS modules, and will try and write as much glue
	  between C libraries and Perl modules as it can. It's also very useful for creating
	  skeletons of pure Perl modules.

       dprofpp
	  Perl comes with a profiler, the Devel::DProf module. The dprofpp utility analyzes the
	  output of this profiler and tells you which subroutines are taking up the most run
	  time. See Devel::DProf for more information.

       perlcc
	  perlcc is the interface to the experimental Perl compiler suite.

       SEE ALSO

       perldoc, pod2man, perlpod, pod2html, pod2usage, podselect, podchecker, splain, perldiag,
       roffitall, a2p, s2p, find2perl, File::Find, pl2pm, perlbug, h2ph, c2ph, h2xs, dprofpp,
       Devel::DProf, perlcc

perl v5.8.0				    2003-02-18				      PERLUTIL(1)
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