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perlutil



DESCRIPTION

       Along with the Perl interpreter itself, the Perl distribu­
       tion installs a range of utilities on your system. There
       are also several utilities which are used by the Perl dis­
       tribution itself as part of the install process. This doc­
       ument exists to list all of these utilities, explain what
       they are for and provide pointers to each module's docu­
       mentation, if appropriate.

       DOCUMENTATION

       perldoc
          The main interface to Perl's documentation is "perl­
          doc", 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 informa­
          tion on any of the utilities described in this docu­
          ment.

       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: "podse­
          lect -s "SYNOPSIS" ..." will extract this section for a
          given file.

       podchecker
       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 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.

          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 corre­
          sponding .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 pro­
          filer 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 com­
          piler 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 v5.8.1                 2003-09-02                PERLUTIL(1)
  
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