X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=utils%2Fperldoc.PL;h=76caaabda039351cd55a5649aca766866ca56df8;hb=abc0a0153433fe6596e1ca3a6b5572dc424d0f11;hp=0ac8e0a806b2e61ae8e27b7385c583e70da7fa62;hpb=cce34969d5db0324ad932993341d3b01490c4690;p=p5sagit%2Fp5-mst-13.2.git diff --git a/utils/perldoc.PL b/utils/perldoc.PL index 0ac8e0a..76caaab 100644 --- a/utils/perldoc.PL +++ b/utils/perldoc.PL @@ -2,6 +2,7 @@ use Config; use File::Basename qw(&basename &dirname); +use Cwd; # List explicitly here the variables you want Configure to # generate. Metaconfig only looks for shell variables, so you @@ -12,6 +13,7 @@ use File::Basename qw(&basename &dirname); # This forces PL files to create target in same directory as PL file. # This is so that make depend always knows where to find PL derivatives. +$origdir = cwd; chdir dirname($0); $file = basename($0, '.PL'); $file .= '.com' if $^O eq 'VMS'; @@ -23,47 +25,75 @@ print "Extracting $file (with variable substitutions)\n"; # In this section, perl variables will be expanded during extraction. # You can use $Config{...} to use Configure variables. +my $versiononly = $Config{versiononly} ? $Config{version} : ''; + print OUT <<"!GROK!THIS!"; $Config{startperl} eval 'exec $Config{perlpath} -S \$0 \${1+"\$@"}' - if \$running_under_some_shell; + if 0; + +use warnings; +use strict; + +# make sure creat()s are neither too much nor too little +INIT { eval { umask(0077) } } # doubtless someone has no mask + +(my \$pager = <<'/../') =~ s/\\s*\\z//; +$Config{pager} +/../ +my \@pagers = (); +push \@pagers, \$pager if -x \$pager; + +(my \$bindir = <<'/../') =~ s/\\s*\\z//; +$Config{scriptdirexp} +/../ + +(my \$pod2man = <<'/../') =~ s/\\s*\\z//; +pod2man$versiononly +/../ -\@pagers = (); -push \@pagers, "$Config{'pager'}" if -x "$Config{'pager'}"; !GROK!THIS! # In the following, perl variables are not expanded during extraction. print OUT <<'!NO!SUBS!'; +use Fcntl; # for sysopen +use Getopt::Std; +use Config '%Config'; +use File::Spec::Functions qw(catfile splitdir); + # # Perldoc revision #1 -- look up a piece of documentation in .pod format that # is embedded in the perl installation tree. # -# This is not to be confused with Tom Christianson's perlman, which is a +# This is not to be confused with Tom Christiansen's perlman, which is a # man replacement, written in perl. This perldoc is strictly for reading # the perl manuals, though it too is written in perl. +# +# Massive security and correctness patches applied to this +# noisome program by Tom Christiansen Sat Mar 11 15:22:33 MST 2000 -if(@ARGV<1) { - $me = $0; # Editing $0 is unportable +if (@ARGV<1) { + my $me = $0; # Editing $0 is unportable $me =~ s,.*/,,; die < == 0 || $< == 0) + && !am_taint_checking()) +{{ + if ($opt_U) { + my $id = eval { getpwnam("nobody") }; + $id = eval { getpwnam("nouser") } unless defined $id; + $id = -2 unless defined $id; + # + # According to Stevens' APUE and various + # (BSD, Solaris, HP-UX) man pages setting + # the real uid first and effective uid second + # is the way to go if one wants to drop privileges, + # because if one changes into an effective uid of + # non-zero, one cannot change the real uid any more. + # + # Actually, it gets even messier. There is + # a third uid, called the saved uid, and as + # long as that is zero, one can get back to + # uid of zero. Setting the real-effective *twice* + # helps in *most* systems (FreeBSD and Solaris) + # but apparently in HP-UX even this doesn't help: + # the saved uid stays zero (apparently the only way + # in HP-UX to change saved uid is to call setuid() + # when the effective uid is zero). + # + eval { + $< = $id; # real uid + $> = $id; # effective uid + $< = $id; # real uid + $> = $id; # effective uid + }; + last if !$@ && $< && $>; + } + die "Superuser must not run $0 without security audit and taint checks.\n"; +}} -if ($opt_t + $opt_u + $opt_m + $opt_l > 1) { +$opt_n = "nroff" if !$opt_n; + +my $podidx; +if ($opt_X) { + $podidx = "$Config{'archlib'}/pod.idx"; + $podidx = "" unless -f $podidx && -r _ && -M _ <= 7; +} + +if ((my $opts = do{ no warnings; $opt_t + $opt_u + $opt_m + $opt_l }) > 1) { usage("only one of -t, -u, -m or -l") -} elsif ($Is_MSWin32) { - $opt_t = 1 unless $opt_t + $opt_u + $opt_m + $opt_l; +} +elsif ($Is_MSWin32 + || $Is_Dos + || !($ENV{TERM} && $ENV{TERM} !~ /dumb|emacs|none|unknown/i)) +{ + $opt_t = 1 unless $opts; } if ($opt_t) { require Pod::Text; import Pod::Text; } +my @pages; if ($opt_f) { - @pages = ("perlfunc"); -} else { - @pages = @ARGV; + @pages = ("perlfunc"); +} +elsif ($opt_q) { + @pages = ("perlfaq1" .. "perlfaq9"); +} +else { + @pages = @ARGV; } # Does this look like a module or extension directory? if (-f "Makefile.PL") { - # Add ., lib and blib/* libs to @INC (if they exist) - unshift(@INC, '.'); - unshift(@INC, 'lib') if -d 'lib'; - require ExtUtils::testlib; -} + # Add ., lib to @INC (if they exist) + eval q{ use lib qw(. lib); 1; } or die; + # don't add if superuser + if ($< && $> && -f "blib") { # don't be looking too hard now! + eval q{ use blib; 1 }; + warn $@ if $@ && $opt_v; + } +} sub containspod { my($file, $readit) = @_; - return 1 if !$readit && $file =~ /\.pod$/i; + return 1 if !$readit && $file =~ /\.pod\z/i; local($_); - open(TEST,"<$file"); - while() { - if(/^=head/) { - close(TEST); + open(TEST,"<", $file) or die "Can't open $file: $!"; + while () { + if (/^=head/) { + close(TEST) or die "Can't close $file: $!"; return 1; } } - close(TEST); + close(TEST) or die "Can't close $file: $!"; return 0; } sub minus_f_nocase { - my($file) = @_; - # on a case-forgiving file system we can simply use -f $file - if ($Is_VMS or $Is_MSWin32 or $^O eq 'os2') { - return $file if -f $file and -r _; - warn "Ignored $file: unreadable\n" unless -r _; + my($dir,$file) = @_; + my $path = catfile($dir,$file); + return $path if -f $path and -r _; + if (!$opt_i or $Is_VMS or $Is_MSWin32 or $Is_Dos or $^O eq 'os2') { + # on a case-forgiving file system or if case is important + # that is it all we can do + warn "Ignored $path: unreadable\n" if -f _; return ''; } local *DIR; + # this is completely wicked. don't mess with $", and if + # you do, don't assume / is the dirsep! local($")="/"; - my(@p,$p,$cip); - foreach $p (split(/\//, $file)){ - my $try = "@p/$p"; + my @p = ($dir); + my($p,$cip); + foreach $p (splitdir $file){ + my $try = catfile @p, $p; stat $try; - if (-d _){ + if (-d _) { push @p, $p; if ( $p eq $global_target) { - $tmp_path = join ('/', @p); + my $tmp_path = catfile @p; my $path_f = 0; for (@global_found) { $path_f = 1 if $_ eq $tmp_path; @@ -173,34 +286,45 @@ sub minus_f_nocase { push (@global_found, $tmp_path) unless $path_f; print STDERR "Found as @p but directory\n" if $opt_v; } - } elsif (-f _ && -r _) { + } + elsif (-f _ && -r _) { return $try; - } elsif (-f _) { + } + elsif (-f _) { warn "Ignored $try: unreadable\n"; - } else { + } + elsif (-d "@p") { my $found=0; my $lcp = lc $p; - opendir DIR, "@p"; + opendir DIR, "@p" or die "opendir @p: $!"; while ($cip=readdir(DIR)) { if (lc $cip eq $lcp){ $found++; last; } } - closedir DIR; + closedir DIR or die "closedir @p: $!"; return "" unless $found; push @p, $cip; return "@p" if -f "@p" and -r _; - warn "Ignored $file: unreadable\n" if -f _; + warn "Ignored @p: unreadable\n" if -f _; } } - return; # is not a file + return ""; } - + sub check_file { - my($file) = @_; - return minus_f_nocase($file) && containspod($file) ? $file : ""; + my($dir,$file) = @_; + return "" if length $dir and not -d $dir; + if ($opt_m) { + return minus_f_nocase($dir,$file); + } + else { + my $path = minus_f_nocase($dir,$file); + return $path if length $path and containspod($path); + } + return ""; } @@ -213,35 +337,38 @@ sub searchfor { my $ret; my $i; my $dir; - $global_target = (split('/', $s))[-1]; + $global_target = (splitdir $s)[-1]; # XXX: why not use File::Basename? for ($i=0; $i<@dirs; $i++) { $dir = $dirs[$i]; - ($dir = VMS::Filespec::unixpath($dir)) =~ s!/$!! if $Is_VMS; - if ( ( $ret = check_file "$dir/$s.pod") - or ( $ret = check_file "$dir/$s.pm") - or ( $ret = check_file "$dir/$s") + ($dir = VMS::Filespec::unixpath($dir)) =~ s!/\z!! if $Is_VMS; + if ( (! $opt_m && ( $ret = check_file $dir,"$s.pod")) + or ( $ret = check_file $dir,"$s.pm") + or ( $ret = check_file $dir,$s) or ( $Is_VMS and - $ret = check_file "$dir/$s.com") - or ( $^O eq 'os2' and - $ret = check_file "$dir/$s.cmd") - or ( ($Is_MSWin32 or $^O eq 'os2') and - $ret = check_file "$dir/$s.bat") - or ( $ret = check_file "$dir/pod/$s.pod") - or ( $ret = check_file "$dir/pod/$s") + $ret = check_file $dir,"$s.com") + or ( $^O eq 'os2' and + $ret = check_file $dir,"$s.cmd") + or ( ($Is_MSWin32 or $Is_Dos or $^O eq 'os2') and + $ret = check_file $dir,"$s.bat") + or ( $ret = check_file "$dir/pod","$s.pod") + or ( $ret = check_file "$dir/pod",$s) + or ( $ret = check_file "$dir/pods","$s.pod") + or ( $ret = check_file "$dir/pods",$s) ) { return $ret; } - + if ($recurse) { - opendir(D,$dir); - my @newdirs = map "$dir/$_", grep { - not /^\.\.?$/ and - not /^auto$/ and # save time! don't search auto dirs - -d "$dir/$_" + opendir(D,$dir) or die "Can't opendir $dir: $!"; + my @newdirs = map catfile($dir, $_), grep { + not /^\.\.?\z/s and + not /^auto\z/s and # save time! don't search auto dirs + -d catfile($dir, $_) } readdir D; - closedir(D); + closedir(D) or die "Can't closedir $dir: $!"; next unless @newdirs; - @newdirs = map((s/.dir$//,$_)[1],@newdirs) if $Is_VMS; + # what a wicked map! + @newdirs = map((s/\.dir\z//,$_)[1],@newdirs) if $Is_VMS; print STDERR "Also looking in @newdirs\n" if $opt_v; push(@dirs,@newdirs); } @@ -249,61 +376,108 @@ sub searchfor { return (); } +sub filter_nroff { + my @data = split /\n{2,}/, shift; + shift @data while @data and $data[0] !~ /\S/; # Go to header + shift @data if @data and $data[0] =~ /Contributed\s+Perl/; # Skip header + pop @data if @data and $data[-1] =~ /^\w/; # Skip footer, like + # 28/Jan/99 perl 5.005, patch 53 1 + join "\n\n", @data; +} +sub page { + my ($tmp, $no_tty, @pagers) = @_; + if ($no_tty) { + open(TMP,"<", $tmp) or die "Can't open $tmp: $!"; + local $_; + while () { + print or die "Can't print to stdout: $!"; + } + close TMP or die "Can't close while $tmp: $!"; + } + else { + # On VMS, quoting prevents logical expansion, and temp files with no + # extension get the wrong default extension (such as .LIS for TYPE) + + $tmp = VMS::Filespec::rmsexpand($tmp, '.') if ($Is_VMS); + foreach my $pager (@pagers) { + if ($Is_VMS) { + last if system("$pager $tmp") == 0; + } else { + last if system("$pager \"$tmp\"") == 0; + } + } + } +} + +my @found; foreach (@pages) { - print STDERR "Searching for $_\n" if $opt_v; - # We must look both in @INC for library modules and in PATH - # for executables, like h2xs or perldoc itself. - @searchdirs = @INC; - if ($opt_F) { - next unless -r; - push @found, $_ if $opt_m or containspod($_); - next; + if ($podidx && open(PODIDX, $podidx)) { + my $searchfor = catfile split '::'; + print STDERR "Searching for '$searchfor' in $podidx\n" if $opt_v; + local $_; + while () { + chomp; + push(@found, $_) if m,/$searchfor(?:\.(?:pod|pm))?\z,i; } - unless ($opt_m) { - if ($Is_VMS) { - my($i,$trn); - for ($i = 0; $trn = $ENV{'DCL$PATH'.$i}; $i++) { - push(@searchdirs,$trn); - } - } else { - push(@searchdirs, grep(-d, split($Config{path_sep}, - $ENV{'PATH'}))); + close(PODIDX) or die "Can't close $podidx: $!"; + next; + } + print STDERR "Searching for $_\n" if $opt_v; + if ($opt_F) { + next unless -r; + push @found, $_ if $opt_m or containspod($_); + next; + } + # We must look both in @INC for library modules and in $bindir + # for executables, like h2xs or perldoc itself. + my @searchdirs = ($bindir, @INC); + unless ($opt_m) { + if ($Is_VMS) { + my($i,$trn); + for ($i = 0; $trn = $ENV{'DCL$PATH;'.$i}; $i++) { + push(@searchdirs,$trn); } - @files= searchfor(0,$_,@searchdirs); + push(@searchdirs,'perl_root:[lib.pod]') # installed pods } - if( @files ) { - print STDERR "Found as @files\n" if $opt_v; - } else { - # no match, try recursive search - - @searchdirs = grep(!/^\.$/,@INC); - - @files= searchfor(1,$_,@searchdirs); - if( @files ) { - print STDERR "Loosely found as @files\n" if $opt_v; - } else { - print STDERR "No documentation found for \"$_\".\n"; - if (@global_found) { - print STDERR "However, try\n"; - my $dir = $file = ""; - for $dir (@global_found) { - opendir(DIR, $dir) or die "$!"; - while ($file = readdir(DIR)) { - next if ($file =~ /^\./); - $file =~ s/\.(pm|pod)$//; - print STDERR "\tperldoc $_\::$file\n"; - } - closedir DIR; - } - } + else { + push(@searchdirs, grep(-d, split($Config{path_sep}, + $ENV{'PATH'}))); + } + } + my @files = searchfor(0,$_,@searchdirs); + if (@files) { + print STDERR "Found as @files\n" if $opt_v; + } + else { + # no match, try recursive search + @searchdirs = grep(!/^\.\z/s,@INC); + @files= searchfor(1,$_,@searchdirs) if $opt_r; + if (@files) { + print STDERR "Loosely found as @files\n" if $opt_v; + } + else { + print STDERR "No " . + ($opt_m ? "module" : "documentation") . " found for \"$_\".\n"; + if (@global_found) { + print STDERR "However, try\n"; + for my $dir (@global_found) { + opendir(DIR, $dir) or die "opendir $dir: $!"; + while (my $file = readdir(DIR)) { + next if ($file =~ /^\./s); + $file =~ s/\.(pm|pod)\z//; # XXX: badfs + print STDERR "\tperldoc $_\::$file\n"; + } + closedir DIR or die "closedir $dir: $!"; } + } } - push(@found,@files); + } + push(@found,@files); } -if(!@found) { - exit ($Is_VMS ? 98962 : 1); +if (!@found) { + exit ($Is_VMS ? 98962 : 1); } if ($opt_l) { @@ -311,117 +485,185 @@ if ($opt_l) { exit; } -if( ! -t STDOUT ) { $no_tty = 1 } +my $lines = $ENV{LINES} || 24; + +my $no_tty; +if (! -t STDOUT) { $no_tty = 1 } +END { close(STDOUT) || die "Can't close STDOUT: $!" } if ($Is_MSWin32) { - $tmp = "$ENV{TEMP}\\perldoc1.$$"; - push @pagers, qw( more< less notepad ); - unshift @pagers, $ENV{PAGER} if $ENV{PAGER}; -} elsif ($Is_VMS) { - $tmp = 'Sys$Scratch:perldoc.tmp1_'.$$; - push @pagers, qw( most more less type/page ); -} else { - if ($^O eq 'os2') { - require POSIX; - $tmp = POSIX::tmpnam(); - } else { - $tmp = "/tmp/perldoc1.$$"; - } - push @pagers, qw( more less pg view cat ); - unshift @pagers, $ENV{PAGER} if $ENV{PAGER}; + push @pagers, qw( more< less notepad ); + unshift @pagers, $ENV{PAGER} if $ENV{PAGER}; + for (@found) { s,/,\\,g } +} +elsif ($Is_VMS) { + push @pagers, qw( most more less type/page ); +} +elsif ($Is_Dos) { + push @pagers, qw( less.exe more.com< ); + unshift @pagers, $ENV{PAGER} if $ENV{PAGER}; +} +else { + if ($^O eq 'os2') { + unshift @pagers, 'less', 'cmd /c more <'; + } + push @pagers, qw( more less pg view cat ); + unshift @pagers, $ENV{PAGER} if $ENV{PAGER}; } unshift @pagers, $ENV{PERLDOC_PAGER} if $ENV{PERLDOC_PAGER}; if ($opt_m) { - foreach $pager (@pagers) { - system("$pager @found") or exit; - } - if ($Is_VMS) { eval 'use vmsish qw(status exit); exit $?' } - exit 1; -} + foreach my $pager (@pagers) { + if (system($pager, @found) == 0) { + exit; + } + } + if ($Is_VMS) { + eval q{ + use vmsish qw(status exit); + exit $?; + 1; + } or die; + } + exit(1); +} +my @pod; if ($opt_f) { - my $perlfunc = shift @found; - open(PFUNC, $perlfunc) or die "Can't open $perlfunc: $!"; - - # Skip introduction - while () { - last if /^=head2 Alphabetical Listing of Perl Functions/; - } - - # Look for our function - my $found = 0; - my @pod; - while () { - if (/^=item\s+\Q$opt_f\E\b/o) { - $found = 1; - } elsif (/^=item/) { - last if $found > 1; - } - next unless $found; - push @pod, $_; - ++$found if /^\w/; # found descriptive text - } - if (@pod) { - if ($opt_t) { - open(FORMATTER, "| pod2text") || die "Can't start filter"; - print FORMATTER "=over 8\n\n"; - print FORMATTER @pod; - print FORMATTER "=back\n"; - close(FORMATTER); - } else { - print @pod; - } - } else { - die "No documentation for perl function `$opt_f' found\n"; - } - exit; -} + my $perlfunc = shift @found; + open(PFUNC, "<", $perlfunc) + or die("Can't open $perlfunc: $!"); + + # Functions like -r, -e, etc. are listed under `-X'. + my $search_string = ($opt_f =~ /^-[rwxoRWXOeszfdlpSbctugkTBMAC]$/) + ? 'I<-X' : $opt_f ; + + # Skip introduction + local $_; + while () { + last if /^=head2 Alphabetical Listing of Perl Functions/; + } -foreach (@found) { + # Look for our function + my $found = 0; + my $inlist = 0; + while () { + if (/^=item\s+\Q$search_string\E\b/o) { + $found = 1; + } + elsif (/^=item/) { + last if $found > 1 and not $inlist; + } + next unless $found; + if (/^=over/) { + ++$inlist; + } + elsif (/^=back/) { + --$inlist; + } + push @pod, $_; + ++$found if /^\w/; # found descriptive text + } + if (!@pod) { + die "No documentation for perl function `$opt_f' found\n"; + } + close PFUNC or die "Can't open $perlfunc: $!"; +} - if($opt_t) { - open(TMP,">>$tmp"); - Pod::Text::pod2text($_,*TMP); - close(TMP); - } elsif(not $opt_u) { - my $cmd = "pod2man --lax $_ | nroff -man"; - $cmd .= " | col -x" if $^O =~ /hpux/; - $rslt = `$cmd`; - unless(($err = $?)) { - open(TMP,">>$tmp"); - print TMP $rslt; - close TMP; - } +if ($opt_q) { + local @ARGV = @found; # I'm lazy, sue me. + my $found = 0; + my %found_in; + my $rx = eval { qr/$opt_q/ } or die <|]/ } + local $_; + while (<>) { + if (/^=head2\s+.*(?:$opt_q)/oi) { + $found = 1; + push @pod, "=head1 Found in $ARGV\n\n" unless $found_in{$ARGV}++; } - - if( $opt_u or $err or -z $tmp) { - open(OUT,">>$tmp"); - open(IN,"<$_"); - $cut = 1; - while () { - $cut = $1 eq 'cut' if /^=(\w+)/; - next if $cut; - print OUT; - } - close(IN); - close(OUT); + elsif (/^=head[12]/) { + $found = 0; } + next unless $found; + push @pod, $_; + } + if (!@pod) { + die("No documentation for perl FAQ keyword `$opt_q' found\n"); + } } -if( $no_tty ) { - open(TMP,"<$tmp"); - print while ; - close(TMP); -} else { - foreach $pager (@pagers) { - system("$pager $tmp") or last; +require File::Temp; + +my ($tmpfd, $tmp) = File::Temp::tempfile(UNLINK => 1); + +my $filter; + +if (@pod) { + my ($buffd, $buffer) = File::Temp::tempfile(UNLINK => 1); + print $buffd "=over 8\n\n"; + print $buffd @pod or die "Can't print $buffer: $!"; + print $buffd "=back\n"; + close $buffd or die "Can't close $buffer: $!"; + @found = $buffer; + $filter = 1; +} + +foreach (@found) { + my $file = $_; + my $err; + + if ($opt_t) { + Pod::Text->new()->parse_from_file($file, $tmpfd); + } + elsif (not $opt_u) { + my $cmd = catfile($bindir, $pod2man) . " --lax $file | $opt_n -man"; + $cmd .= " | col -x" if $^O =~ /hpux/; + my $rslt = `$cmd`; + $rslt = filter_nroff($rslt) if $filter; + unless (($err = $?)) { + print $tmpfd $rslt + or die "Can't print $tmp: $!"; } + } + if ($opt_u or $err) { + open(IN,"<", $file) or die("Can't open $file: $!"); + my $cut = 1; + local $_; + while () { + $cut = $1 eq 'cut' if /^=(\w+)/; + next if $cut; + print $tmpfd $_ + or die "Can't print $tmp: $!"; + } + close IN or die "Can't close $file: $!"; + } +} +close $tmpfd + or die "Can't close $tmp: $!"; +page($tmp, $no_tty, @pagers); + +exit; + +sub is_tainted { + my $arg = shift; + my $nada = substr($arg, 0, 0); # zero-length + local $@; # preserve caller's version + eval { eval "# $nada" }; + return length($@) != 0; } -1 while unlink($tmp); #Possibly pointless VMSism +sub am_taint_checking { + my($k,$v) = each %ENV; + return is_tainted($v); +} -exit 0; __END__ @@ -431,10 +673,12 @@ perldoc - Look up Perl documentation in pod format. =head1 SYNOPSIS -B [B<-h>] [B<-v>] [B<-t>] [B<-u>] [B<-m>] [B<-l>] PageName|ModuleName|ProgramName +B [B<-h>] [B<-v>] [B<-t>] [B<-u>] [B<-m>] [B<-l>] [B<-F>] [B<-X>] PageName|ModuleName|ProgramName B B<-f> BuiltinFunction +B B<-q> FAQ Keyword + =head1 DESCRIPTION I looks up a piece of documentation in .pod format that is embedded @@ -446,6 +690,9 @@ the perl library modules. Your system may also have man pages installed for those modules, in which case you can probably just use the man(1) command. +If you are looking for a table of contents to the Perl library modules +documentation, see the L page. + =head1 OPTIONS =over 5 @@ -480,50 +727,99 @@ Display the file name of the module found. =item B<-F> file names -Consider arguments as file names, no search in directories should be performed. +Consider arguments as file names, no search in directories will be performed. =item B<-f> perlfunc The B<-f> option followed by the name of a perl built in function will extract the documentation of this function from L. +=item B<-q> perlfaq + +The B<-q> option takes a regular expression as an argument. It will search +the question headings in perlfaq[1-9] and print the entries matching +the regular expression. + +=item B<-X> use an index if present + +The B<-X> option looks for an entry whose basename matches the name given on the +command line in the file C<$Config{archlib}/pod.idx>. The pod.idx file should +contain fully qualified filenames, one per line. + +=item B<-U> run insecurely + +Because B does not run properly tainted, and is known to +have security issues, it will not normally execute as the superuser. +If you use the B<-U> flag, it will do so, but only after setting +the effective and real IDs to nobody's or nouser's account, or -2 +if unavailable. If it cannot relinquish its privileges, it will not +run. + =item B The item you want to look up. Nested modules (such as C) are specified either as C or C. You may also -give a descriptive name of a page, such as C. You make also give a -partial or wrong-case name, such as "basename" for "File::Basename", but -this will be slower, if there is more then one page with the same partial -name, you will only get the first one. +give a descriptive name of a page, such as C. =back =head1 ENVIRONMENT -Any switches in the C environment variable will be used before the +Any switches in the C environment variable will be used before the command line arguments. C also searches directories specified by the C (or C if C is not defined) and C environment variables. (The latter is so that embedded pods for executables, such as -C itself, are available.) +C itself, are available.) C will use, in order of +preference, the pager defined in C, C, or +C before trying to find a pager on its own. (C is not +used if C was told to display plain text or unformatted pod.) + +One useful value for C is C. + +=head1 VERSION + +This is perldoc v2.03. =head1 AUTHOR Kenneth Albanowski -Minor updates by Andy Dougherty +Minor updates by Andy Dougherty , +and others. =cut # +# Version 2.03: Sun Apr 23 16:56:34 BST 2000 +# Hugo van der Sanden +# don't die when 'use blib' fails +# Version 2.02: Mon Mar 13 18:03:04 MST 2000 +# Tom Christiansen +# Added -U insecurity option +# Version 2.01: Sat Mar 11 15:22:33 MST 2000 +# Tom Christiansen , querulously. +# Security and correctness patches. +# What a twisted bit of distasteful spaghetti code. +# Version 2.0: ???? +# Version 1.15: Tue Aug 24 01:50:20 EST 1999 +# Charles Wilson +# changed /pod/ directory to /pods/ for cygwin +# to support cygwin/win32 +# Version 1.14: Wed Jul 15 01:50:20 EST 1998 +# Robin Barker +# -strict, -w cleanups +# Version 1.13: Fri Feb 27 16:20:50 EST 1997 +# Gurusamy Sarathy +# -doc tweaks for -F and -X options # Version 1.12: Sat Apr 12 22:41:09 EST 1997 -# Gurusamy Sarathy +# Gurusamy Sarathy # -various fixes for win32 # Version 1.11: Tue Dec 26 09:54:33 EST 1995 # Kenneth Albanowski # -added Charles Bailey's further VMS patches, and -u switch # -added -t switch, with pod2text support -# +# # Version 1.10: Thu Nov 9 07:23:47 EST 1995 # Kenneth Albanowski # -added VMS support @@ -549,3 +845,4 @@ Minor updates by Andy Dougherty close OUT or die "Can't close $file: $!"; chmod 0755, $file or die "Can't reset permissions for $file: $!\n"; exec("$Config{'eunicefix'} $file") if $Config{'eunicefix'} ne ':'; +chdir $origdir;