4 use File::Basename qw(&basename &dirname);
6 # List explicitly here the variables you want Configure to
7 # generate. Metaconfig only looks for shell variables, so you
8 # have to mention them as if they were shell variables, not
9 # %Config entries. Thus you write
11 # to ensure Configure will look for $Config{startperl}.
13 # This forces PL files to create target in same directory as PL file.
14 # This is so that make depend always knows where to find PL derivatives.
16 $file = basename($0, '.PL');
17 $file .= '.com' if $^O eq 'VMS';
19 open OUT,">$file" or die "Can't create $file: $!";
21 print "Extracting $file (with variable substitutions)\n";
23 # In this section, perl variables will be expanded during extraction.
24 # You can use $Config{...} to use Configure variables.
26 print OUT <<"!GROK!THIS!";
28 eval 'exec $Config{perlpath} -S \$0 \${1+"\$@"}'
29 if \$running_under_some_shell;
32 push \@pagers, "$Config{'pager'}" if -x "$Config{'pager'}";
35 # In the following, perl variables are not expanded during extraction.
37 print OUT <<'!NO!SUBS!';
40 # Perldoc revision #1 -- look up a piece of documentation in .pod format that
41 # is embedded in the perl installation tree.
43 # This is not to be confused with Tom Christianson's perlman, which is a
44 # man replacement, written in perl. This perldoc is strictly for reading
45 # the perl manuals, though it too is written in perl.
48 $me = $0; # Editing $0 is unportable
51 Usage: $me [-h] [-v] [-t] [-u] [-m] [-l] [-F] PageName|ModuleName|ProgramName
54 We suggest you use "perldoc perldoc" to get aquainted
65 $Is_VMS = $^O eq 'VMS';
66 $Is_MSWin32 = $^O eq 'MSWin32';
70 # Erase evidence of previous errors (if any), so exit status is simple.
73 perldoc [options] PageName|ModuleName|ProgramName...
74 perldoc [options] -f BuiltinFunction
77 -h Display this help message
78 -t Display pod using pod2text instead of pod2man and nroff
79 (-t is the default on win32)
80 -u Display unformatted pod text
81 -m Display modules file in its entirety
82 -l Display the modules file name
83 -F Arguments are file names, not modules
84 -v Verbosely describe what's going on
86 PageName|ModuleName...
87 is the name of a piece of documentation that you want to look at. You
88 may either give a descriptive name of the page (as in the case of
89 `perlfunc') the name of a module, either like `Term::Info',
90 `Term/Info', the partial name of a module, like `info', or
91 `makemaker', or the name of a program, like `perldoc'.
94 is the name of a perl function. Will extract documentation from
97 Any switches in the PERLDOC environment variable will be used before the
98 command line arguments.
103 use Text::ParseWords;
106 unshift(@ARGV,shellwords($ENV{"PERLDOC"}));
108 getopts("mhtluvFf:") || usage;
110 usage if $opt_h || $opt_h; # avoid -w warning
112 if ($opt_t + $opt_u + $opt_m + $opt_l > 1) {
113 usage("only one of -t, -u, -m or -l")
114 } elsif ($Is_MSWin32) {
115 $opt_t = 1 unless $opt_t + $opt_u + $opt_m + $opt_l;
118 if ($opt_t) { require Pod::Text; import Pod::Text; }
121 @pages = ("perlfunc");
126 # Does this look like a module or extension directory?
127 if (-f "Makefile.PL") {
128 # Add ., lib and blib/* libs to @INC (if they exist)
130 unshift(@INC, 'lib') if -d 'lib';
131 require ExtUtils::testlib;
137 my($file, $readit) = @_;
138 return 1 if !$readit && $file =~ /\.pod$/i;
153 # on a case-forgiving file system we can simply use -f $file
154 if ($Is_VMS or $Is_MSWin32 or $^O eq 'os2') {
155 return $file if -f $file and -r _;
156 warn "Ignored $file: unreadable\n" if -f _;
162 foreach $p (split(/\//, $file)){
167 if ( $p eq $global_target) {
168 $tmp_path = join ('/', @p);
170 for (@global_found) {
171 $path_f = 1 if $_ eq $tmp_path;
173 push (@global_found, $tmp_path) unless $path_f;
174 print STDERR "Found as @p but directory\n" if $opt_v;
176 } elsif (-f _ && -r _) {
179 warn "Ignored $try: unreadable\n";
184 while ($cip=readdir(DIR)) {
185 if (lc $cip eq $lcp){
191 return "" unless $found;
193 return "@p" if -f "@p" and -r _;
194 warn "Ignored $file: unreadable\n" if -f _;
197 return; # is not a file
203 return minus_f_nocase($file) && containspod($file) ? $file : "";
208 my($recurse,$s,@dirs) = @_;
210 $s = VMS::Filespec::unixify($s) if $Is_VMS;
211 return $s if -f $s && containspod($s);
212 printf STDERR "Looking for $s in @dirs\n" if $opt_v;
216 $global_target = (split('/', $s))[-1];
217 for ($i=0; $i<@dirs; $i++) {
219 ($dir = VMS::Filespec::unixpath($dir)) =~ s!/$!! if $Is_VMS;
220 if ( ( $ret = check_file "$dir/$s.pod")
221 or ( $ret = check_file "$dir/$s.pm")
222 or ( $ret = check_file "$dir/$s")
224 $ret = check_file "$dir/$s.com")
225 or ( $^O eq 'os2' and
226 $ret = check_file "$dir/$s.cmd")
227 or ( ($Is_MSWin32 or $^O eq 'os2') and
228 $ret = check_file "$dir/$s.bat")
229 or ( $ret = check_file "$dir/pod/$s.pod")
230 or ( $ret = check_file "$dir/pod/$s")
237 my @newdirs = map "$dir/$_", grep {
239 not /^auto$/ and # save time! don't search auto dirs
243 next unless @newdirs;
244 @newdirs = map((s/.dir$//,$_)[1],@newdirs) if $Is_VMS;
245 print STDERR "Also looking in @newdirs\n" if $opt_v;
246 push(@dirs,@newdirs);
254 print STDERR "Searching for $_\n" if $opt_v;
255 # We must look both in @INC for library modules and in PATH
256 # for executables, like h2xs or perldoc itself.
260 push @found, $_ if $opt_m or containspod($_);
266 for ($i = 0; $trn = $ENV{'DCL$PATH'.$i}; $i++) {
267 push(@searchdirs,$trn);
270 push(@searchdirs, grep(-d, split($Config{path_sep},
273 @files= searchfor(0,$_,@searchdirs);
276 print STDERR "Found as @files\n" if $opt_v;
278 # no match, try recursive search
280 @searchdirs = grep(!/^\.$/,@INC);
282 @files= searchfor(1,$_,@searchdirs);
284 print STDERR "Loosely found as @files\n" if $opt_v;
286 print STDERR "No documentation found for \"$_\".\n";
288 print STDERR "However, try\n";
289 my $dir = $file = "";
290 for $dir (@global_found) {
291 opendir(DIR, $dir) or die "$!";
292 while ($file = readdir(DIR)) {
293 next if ($file =~ /^\./);
294 $file =~ s/\.(pm|pod)$//;
295 print STDERR "\tperldoc $_\::$file\n";
306 exit ($Is_VMS ? 98962 : 1);
310 print join("\n", @found), "\n";
314 if( ! -t STDOUT ) { $no_tty = 1 }
317 $tmp = "$ENV{TEMP}\\perldoc1.$$";
318 push @pagers, qw( more< less notepad );
319 unshift @pagers, $ENV{PAGER} if $ENV{PAGER};
321 $tmp = 'Sys$Scratch:perldoc.tmp1_'.$$;
322 push @pagers, qw( most more less type/page );
326 $tmp = POSIX::tmpnam();
328 $tmp = "/tmp/perldoc1.$$";
330 push @pagers, qw( more less pg view cat );
331 unshift @pagers, $ENV{PAGER} if $ENV{PAGER};
333 unshift @pagers, $ENV{PERLDOC_PAGER} if $ENV{PERLDOC_PAGER};
336 foreach $pager (@pagers) {
337 system("$pager @found") or exit;
339 if ($Is_VMS) { eval 'use vmsish qw(status exit); exit $?' }
344 my $perlfunc = shift @found;
345 open(PFUNC, $perlfunc) or die "Can't open $perlfunc: $!";
349 last if /^=head2 Alphabetical Listing of Perl Functions/;
352 # Look for our function
356 if (/^=item\s+\Q$opt_f\E\b/o) {
363 ++$found if /^\w/; # found descriptive text
367 open(FORMATTER, "| pod2text") || die "Can't start filter";
368 print FORMATTER "=over 8\n\n";
369 print FORMATTER @pod;
370 print FORMATTER "=back\n";
376 die "No documentation for perl function `$opt_f' found\n";
385 Pod::Text::pod2text($_,*TMP);
387 } elsif(not $opt_u) {
388 my $cmd = "pod2man --lax $_ | nroff -man";
389 $cmd .= " | col -x" if $^O =~ /hpux/;
391 unless(($err = $?)) {
398 if( $opt_u or $err or -z $tmp) {
403 $cut = $1 eq 'cut' if /^=(\w+)/;
417 foreach $pager (@pagers) {
418 system("$pager $tmp") or last;
422 1 while unlink($tmp); #Possibly pointless VMSism
430 perldoc - Look up Perl documentation in pod format.
434 B<perldoc> [B<-h>] [B<-v>] [B<-t>] [B<-u>] [B<-m>] [B<-l>] PageName|ModuleName|ProgramName
436 B<perldoc> B<-f> BuiltinFunction
440 I<perldoc> looks up a piece of documentation in .pod format that is embedded
441 in the perl installation tree or in a perl script, and displays it via
442 C<pod2man | nroff -man | $PAGER>. (In addition, if running under HP-UX,
443 C<col -x> will be used.) This is primarily used for the documentation for
444 the perl library modules.
446 Your system may also have man pages installed for those modules, in
447 which case you can probably just use the man(1) command.
455 Prints out a brief help message.
459 Describes search for the item in detail.
461 =item B<-t> text output
463 Display docs using plain text converter, instead of nroff. This may be faster,
464 but it won't look as nice.
466 =item B<-u> unformatted
468 Find docs only; skip reformatting by pod2*
472 Display the entire module: both code and unformatted pod documentation.
473 This may be useful if the docs don't explain a function in the detail
474 you need, and you'd like to inspect the code directly; perldoc will find
475 the file for you and simply hand it off for display.
477 =item B<-l> file name only
479 Display the file name of the module found.
481 =item B<-F> file names
483 Consider arguments as file names, no search in directories should be performed.
487 The B<-f> option followed by the name of a perl built in function will
488 extract the documentation of this function from L<perlfunc>.
490 =item B<PageName|ModuleName|ProgramName>
492 The item you want to look up. Nested modules (such as C<File::Basename>)
493 are specified either as C<File::Basename> or C<File/Basename>. You may also
494 give a descriptive name of a page, such as C<perlfunc>. You make also give a
495 partial or wrong-case name, such as "basename" for "File::Basename", but
496 this will be slower, if there is more then one page with the same partial
497 name, you will only get the first one.
503 Any switches in the C<PERLDOC> environment variable will be used before the
504 command line arguments. C<perldoc> also searches directories
505 specified by the C<PERL5LIB> (or C<PERLLIB> if C<PERL5LIB> is not
506 defined) and C<PATH> environment variables.
507 (The latter is so that embedded pods for executables, such as
508 C<perldoc> itself, are available.)
512 Kenneth Albanowski <kjahds@kjahds.com>
514 Minor updates by Andy Dougherty <doughera@lafcol.lafayette.edu>
519 # Version 1.12: Sat Apr 12 22:41:09 EST 1997
520 # Gurusamy Sarathy <gsar@umich.edu>
521 # -various fixes for win32
522 # Version 1.11: Tue Dec 26 09:54:33 EST 1995
523 # Kenneth Albanowski <kjahds@kjahds.com>
524 # -added Charles Bailey's further VMS patches, and -u switch
525 # -added -t switch, with pod2text support
527 # Version 1.10: Thu Nov 9 07:23:47 EST 1995
528 # Kenneth Albanowski <kjahds@kjahds.com>
530 # -added better error recognition (on no found pages, just exit. On
531 # missing nroff/pod2man, just display raw pod.)
532 # -added recursive/case-insensitive matching (thanks, Andreas). This
533 # slows things down a bit, unfortunately. Give a precise name, and
536 # Version 1.01: Tue May 30 14:47:34 EDT 1995
537 # Andy Dougherty <doughera@lafcol.lafayette.edu>
538 # -added pod documentation.
539 # -added PATH searching.
540 # -added searching pod/ subdirectory (mainly to pick up perlfunc.pod
546 # Cache directories read during sloppy match
549 close OUT or die "Can't close $file: $!";
550 chmod 0755, $file or die "Can't reset permissions for $file: $!\n";
551 exec("$Config{'eunicefix'} $file") if $Config{'eunicefix'} ne ':';