Manual Pages for UNIX Darwin command on man perlutil

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 module's documentation, if appropriate. DDOOCCUUMMEENNTTAATTIIOONN 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 " 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 explana-

tion) 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 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 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 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. CCOONNVVEERRTTOORRSS

To help you convert legacy programs to Perl, we've 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. AAddmmiinniissttrraattiioonn libnetcfg To display and change the libnet configuration run the libnetcfg command. DDeevveellooppmmeenntt

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 cor-

responding .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 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. 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 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.