perlutil


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 module's documentation,
       if appropriate.

LIST OF UTILITIES
   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 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 <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 documents written in POD. For instance, while
          utilities have "USAGE" sections, Perl modules 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
          around this code:

              while (<>) {
                  ($Fld1,$Fld2) = split(/[:\n]/, $_, -1);
                  print $Fld2;
              }

       s2p and psed
          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;
              }

          When invoked as psed, it behaves as a sed implementation, written in
          Perl.

       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
       config_data
          Query or change configuration of Perl modules that use
          Module::Build-based configuration files for features and config
          data.

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

       perlivp
          The perlivp program is set up at Perl source code build time to test
          the Perl version it was built under.  It can be used after running
          "make install" (or your platform's equivalent procedure) to verify
          that perl and its libraries have been installed correctly.

          to the authors and maintainers of perl. It's just perlbug installed
          under another name.

       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.

       enc2xs
          enc2xs builds a Perl extension for use by Encode from either Unicode
          Character Mapping files (.ucm) or Tcl Encoding Files (.enc).
          Besides being used internally during the build process of the Encode
          module, you can use enc2xs to add your own encoding to perl.  No
          knowledge of XS is necessary.

       xsubpp
          xsubpp is a compiler to convert Perl XS code into C code.  It is
          typically run by the makefiles created by ExtUtils::MakeMaker.

          xsubpp will compile XS code into C code by embedding the constructs
          necessary to let C functions manipulate Perl values and creates the
          glue necessary to let Perl access those functions.

       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.

       prove
          prove is a command-line interface to the test-running functionality
          of Test::Harness.  It's an alternative to "make test".

       corelist
          A command-line front-end to "Module::CoreList", to query what
          modules were shipped with given versions of perl.

   General tools
       A few general-purpose tools are shipped with perl, mostly because they
          ptardiff is a small utility that produces a diff between an
          extracted archive and an unextracted one. (Note that this utility
          requires the "Text::Diff" module to function properly; this module
          isn't distributed with perl, but is available from the CPAN.)

       ptargrep
          ptargrep is a utility to apply pattern matching to the contents of
          files in a tar archive.

       shasum
          This utility, that comes with the "Digest::SHA" module, is used to
          print or verify SHA checksums.

   Installation
       These utilities help manage extra Perl modules that don't come with the
       perl distribution.

       cpan
          cpan is a command-line interface to CPAN.pm.  It allows you to
          install modules or distributions from CPAN, or just get information
          about them, and a lot more.  It is similar to the command line mode
          of the CPAN module,

              perl -MCPAN -e shell

       cpanp
          cpanp is, like cpan, a command-line interface to the CPAN, using the
          "CPANPLUS" module as a back-end. It can be used interactively or
          imperatively.

       cpan2dist
          cpan2dist is a tool to create distributions (or packages) from CPAN
          modules, then suitable for your package manager of choice. Support
          for specific formats are available from CPAN as "CPANPLUS::Dist::*"
          modules.

       instmodsh
          A little interface to ExtUtils::Installed to examine installed
          modules, validate your packlists and even create a tarball from an
          installed module.

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, enc2xs, xsubpp, cpan,
       cpanp, cpan2dist, instmodsh, piconv, prove, corelist, ptar, ptardiff,
       shasum



perl v5.14.2                      2011-09-26                       PERLUTIL(1)
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