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diff --git a/Master/tlpkg/tlperl/lib/pods/perlutil.pod b/Master/tlpkg/tlperl/lib/pods/perlutil.pod new file mode 100644 index 00000000000..453248d2497 --- /dev/null +++ b/Master/tlpkg/tlperl/lib/pods/perlutil.pod @@ -0,0 +1,309 @@ +=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. + +=head1 LIST OF UTILITIES + +=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]/, $_, -1); + print $Fld2; + } + +=item L<s2p|s2p> and L<psed> + +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 $printit; + } + +When invoked as F<psed>, it behaves as a F<sed> implementation, written in +Perl. + +=item L<find2perl|find2perl> + +Finally, F<find2perl> translates C<find> commands to Perl equivalents which +use the L<File::Find|File::Find> module. As an example, +C<find2perl . -user root -perm 4000 -print> produces the following callback +subroutine for C<File::Find>: + + sub wanted { + my ($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<config_data|config_data> + +Query or change configuration of Perl modules that use Module::Build-based +configuration files for features and config data. + +=item L<libnetcfg|libnetcfg> + +To display and change the libnet configuration run the libnetcfg command. + +=item L<perlivp> + +The F<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 C<make +install> (or your platform's equivalent procedure) to verify that perl +and its libraries have been installed correctly. + +=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<perlthanks|perlthanks> + +This program provides an easy way to send a thank-you message back to the +authors and maintainers of perl. It's just F<perlbug> installed under +another name. + +=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<enc2xs> + +F<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 F<enc2xs> to add your own encoding to perl. +No knowledge of XS is necessary. + +=item L<xsubpp> + +F<xsubpp> is a compiler to convert Perl XS code into C code. +It is typically run by the makefiles created by L<ExtUtils::MakeMaker>. + +F<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. + +=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<prove> + +F<prove> is a command-line interface to the test-running functionality +of F<Test::Harness>. It's an alternative to C<make test>. + +=item L<corelist> + +A command-line front-end to C<Module::CoreList>, to query what modules +were shipped with given versions of perl. + +=back + +=head2 General tools + +A few general-purpose tools are shipped with perl, mostly because they +came along modules included in the perl distribution. + +=over 3 + +=item L<piconv> + +B<piconv> is a Perl version of B<iconv>, a character encoding converter +widely available for various Unixen today. This script was primarily a +technology demonstrator for Perl 5.8.0, but you can use piconv in the +place of iconv for virtually any case. + +=item L<ptar> + +F<ptar> is a tar-like program, written in pure Perl. + +=item L<ptardiff> + +F<ptardiff> is a small utility that produces a diff between an extracted +archive and an unextracted one. (Note that this utility requires the +C<Text::Diff> module to function properly; this module isn't distributed +with perl, but is available from the CPAN.) + +=item L<shasum> + +This utility, that comes with the C<Digest::SHA> module, is used to print +or verify SHA checksums. + +=back + +=head2 Installation + +These utilities help manage extra Perl modules that don't come with the perl +distribution. + +=over 3 + +=item L<cpan> + +F<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 L<CPAN> module, + + perl -MCPAN -e shell + +=item L<cpanp> + +F<cpanp> is, like F<cpan>, a command-line interface to the CPAN, using +the C<CPANPLUS> module as a back-end. It can be used interactively or +imperatively. + +=item L<cpan2dist> + +F<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 C<CPANPLUS::Dist::*> modules. + +=item L<instmodsh> + +A little interface to ExtUtils::Installed to examine installed modules, +validate your packlists and even create a tarball from an installed module. + +=back + +=head1 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<enc2xs>, L<xsubpp>, L<cpan>, L<cpanp>, L<cpan2dist>, +L<instmodsh>, L<piconv>, L<prove>, L<corelist>, L<ptar>, L<ptardiff>, +L<shasum> + +=cut |