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 utilities on your system. There are also several utilities
       which are used by the Perl distribution 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 modules documentation,
       if appropriate.

       DOCUMENTATION


       perldoc
	  The main interface to Perls documentation is "perldoc", although if
	  youre reading this, its more than likely that youve already found
	  it. perldoc will extract and format 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
	  "perldoc " to get information on any of the utilities
	  described in this document.

       pod2man and pod2text
	  If its run from a terminal, perldoc will usually call pod2man to
	  translate POD (Plain Old Documentation - see perlpod for an explana
	  tion) into a manpage, and then run man to display it; if man isnt
	  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 utili
	  ties 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 documents written in POD. For instance, while utili
	  ties have "USAGE" sections, Perl modules usually have "SYNOPSIS"
	  sections: "podselect -s "SYNOPSIS" ..." will extract this section
	  for a given file.

       podchecker
	  If youre 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 itll 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 doc
	  umentation 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, weve included three con
       version 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 produce 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 pro
       grams, and in particular, extending Perl with C.

       perlbug
	  perlbug is the recommended way to report bugs in the perl inter
	  preter itself or any of the standard library modules back to the
	  developers; please read through the documentation for perlbug thor
	  oughly 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 - theyll convert C structures and union dec
	  larations 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. Its
	  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 v5.8.8			  2008-04-25			   PERLUTIL(1)