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- =head1 NAME
-
- perlutil - utilities packaged with the Perl distribution
-
- =head1 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.
-
- =head2 DOCUMENTATION
-
- =over 3
-
- =item L<perldoc|perldoc>
-
- The main interface to Perl's documentation is C<perldoc>, although
- if you're reading this, it's more than likely that you've already found
- it. F<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
- C<perldoc E<lt>nameE<gt>> to get information on any of the utilities
- described in this document.
-
- =item L<pod2man|pod2man> and L<pod2text|pod2text>
-
- If it's run from a terminal, F<perldoc> will usually call F<pod2man> to
- translate POD (Plain Old Documentation - see L<perlpod> for an
- explanation) into a manpage, and then run F<man> to display it; if
- F<man> isn't available, F<pod2text> will be used instead and the output
- piped through your favourite pager.
-
- =item L<pod2html|pod2html> and L<pod2latex|pod2latex>
-
- As well as these two, there are two other converters: F<pod2html> will
- produce HTML pages from POD, and F<pod2latex>, which produces LaTeX
- files.
-
- =item L<pod2usage|pod2usage>
-
- If you just want to know how to use the utilities described here,
- F<pod2usage> will just extract the "USAGE" section; some of
- the utilities will automatically call F<pod2usage> on themselves when
- you call them with C<-help>.
-
- =item L<podselect|podselect>
-
- F<pod2usage> is a special case of F<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: C<podselect -s "SYNOPSIS" ...> will extract this section for
- a given file.
-
- =item L<podchecker|podchecker>
-
- If you're writing your own documentation in POD, the F<podchecker>
- utility will look for errors in your markup.
-
- =item L<splain|splain>
-
- F<splain> is an interface to L<perldiag> - paste in your error message
- to it, and it'll explain it for you.
-
- =item L<roffitall|roffitall>
-
- The C<roffitall> utility is not installed on your system but lives in
- the F<pod/> directory of your Perl source kit; it converts all the
- documentation from the distribution to F<*roff> format, and produces a
- typeset PostScript or text file of the whole lot.
-
- =back
-
- =head2 CONVERTORS
-
- To help you convert legacy programs to Perl, we've included three
- conversion filters:
-
- =over 3
-
- =item L<a2p|a2p>
-
- F<a2p> converts F<awk> scripts to Perl programs; for example, C<a2p -F:>
- on the simple F<awk> script C<{print $2}> will produce a Perl program
- based around this code:
-
- while (<>) {
- ($Fld1,$Fld2) = split(/[:\n]/, $_, 9999);
- print $Fld2;
- }
-
- =item L<s2p|s2p>
-
- Similarly, F<s2p> converts F<sed> scripts to Perl programs. F<s2p> run
- on C<s/foo/bar> will produce a Perl program based around this:
-
- while (<>) {
- chomp;
- s/foo/bar/g;
- print if $printit;
- }
-
- =item L<find2perl|find2perl>
-
- Finally, F<find2perl> translates C<find> commands to Perl equivalents which
- use the L<File::Find|File::Find> module. As an example,
- C<find2perl . -user root -perm 4000 -print> produces the following callback
- subroutine for C<File::Find>:
-
- sub wanted {
- my ($dev,$ino,$mode,$nlink,$uid,$gid);
- (($dev,$ino,$mode,$nlink,$uid,$gid) = lstat($_)) &&
- $uid == $uid{'root'}) &&
- (($mode & 0777) == 04000);
- print("$name\n");
- }
-
- =back
-
- As well as these filters for converting other languages, the
- L<pl2pm|pl2pm> utility will help you convert old-style Perl 4 libraries to
- new-style Perl5 modules.
-
- =head2 Administration
-
- =over 3
-
- =item L<libnetcfg|libnetcfg>
-
- To display and change the libnet configuration run the libnetcfg command.
-
- =back
-
- =head2 Development
-
- There are a set of utilities which help you in developing Perl programs,
- and in particular, extending Perl with C.
-
- =over 3
-
- =item L<perlbug|perlbug>
-
- F<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 documentation for F<perlbug> thoroughly before
- using it to submit a bug report.
-
- =item L<h2ph|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 C<require 'syscall.ph'> or similar
- around - the F<.ph> file should be created by running F<h2ph> on the
- corresponding F<.h> file. See the F<h2ph> documentation for more on how
- to convert a whole bunch of header files at once.
-
- =item L<c2ph|c2ph> and L<pstruct|pstruct>
-
- F<c2ph> and F<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 F<h2xs> these days.
-
- =item L<h2xs|h2xs>
-
- F<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.
-
- =item L<dprofpp|dprofpp>
-
- Perl comes with a profiler, the F<Devel::DProf> module. The
- F<dprofpp> utility analyzes the output of this profiler and tells you
- which subroutines are taking up the most run time. See L<Devel::DProf>
- for more information.
-
- =item L<perlcc|perlcc>
-
- F<perlcc> is the interface to the experimental Perl compiler suite.
-
- =back
-
- =head2 SEE ALSO
-
- L<perldoc|perldoc>, L<pod2man|pod2man>, L<perlpod>,
- L<pod2html|pod2html>, L<pod2usage|pod2usage>, L<podselect|podselect>,
- L<podchecker|podchecker>, L<splain|splain>, L<perldiag>,
- L<roffitall|roffitall>, L<a2p|a2p>, L<s2p|s2p>, L<find2perl|find2perl>,
- L<File::Find|File::Find>, L<pl2pm|pl2pm>, L<perlbug|perlbug>,
- L<h2ph|h2ph>, L<c2ph|c2ph>, L<h2xs|h2xs>, L<dprofpp|dprofpp>,
- L<Devel::DProf>, L<perlcc|perlcc>
-
- =cut
-