#!/home/centos/perldoc-browser/perls/5.6.1/bin/perl eval 'exec /home/centos/perldoc-browser/perls/5.6.1/bin/perl -S $0 ${1+"$@"}' 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//; /usr/bin/less /../ my @pagers = (); push @pagers, $pager if -x $pager; (my $bindir = <<'/../') =~ s/\s*\z//; /home/centos/perldoc-browser/perls/5.6.1/bin /../ 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 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) { 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; eval { $> = $id; # must do this one first! $< = $id; }; last if !$@ && $< && $>; } die "Superuser must not run $0 without security audit and taint checks.\n"; }} $opt_n = "nroff" if !$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 || $Is_Dos || !($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 ($opt_f) { @pages = ("perlfunc"); } elsif ($opt_q) { @pages = ("perlfaq1" .. "perlfaq9"); } else { @pages = @ARGV; } # Does this look like a module or extension directory? if (-f "Makefile.PL") { # 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 && $file =~ /\.pod\z/i; local($_); open(TEST,"<", $file) or die "Can't open $file: $!"; while () { if (/^=head/) { close(TEST) or die "Can't close $file: $!"; return 1; } } close(TEST) or die "Can't close $file: $!"; return 0; } sub minus_f_nocase { my($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 = ($dir); my($p,$cip); foreach $p (splitdir $file){ my $try = catfile @p, $p; stat $try; if (-d _) { push @p, $p; if ( $p eq $global_target) { my $tmp_path = catfile @p; my $path_f = 0; for (@global_found) { $path_f = 1 if $_ eq $tmp_path; } push (@global_found, $tmp_path) unless $path_f; print STDERR "Found as @p but directory\n" if $opt_v; } } elsif (-f _ && -r _) { return $try; } elsif (-f _) { warn "Ignored $try: unreadable\n"; } elsif (-d "@p") { my $found=0; my $lcp = lc $p; opendir DIR, "@p" or die "opendir @p: $!"; while ($cip=readdir(DIR)) { if (lc $cip eq $lcp){ $found++; last; } } closedir DIR or die "closedir @p: $!"; return "" unless $found; push @p, $cip; return "@p" if -f "@p" and -r _; warn "Ignored @p: unreadable\n" if -f _; } } return ""; } sub check_file { my($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 ""; } sub searchfor { my($recurse,$s,@dirs) = @_; $s =~ s!::!/!g; $s = VMS::Filespec::unixify($s) if $Is_VMS; return $s if -f $s && containspod($s); printf STDERR "Looking for $s in @dirs\n" if $opt_v; my $ret; my $i; my $dir; $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!/\z!! if $Is_VMS; if ( ( $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 $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) 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) or die "Can't closedir $dir: $!"; next unless @newdirs; # what a wicked map! @newdirs = map((s/\.dir\z//,$_)[1],@newdirs) if $Is_VMS; print STDERR "Also looking in @newdirs\n" if $opt_v; push(@dirs,@newdirs); } } 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 $data[-1] =~ /^\w/; # Skip footer, like # 28/Jan/99 perl 5.005, patch 53 1 join "\n\n", @data; } sub printout { my ($file, $tmp, $filter) = @_; my $err; if ($opt_t) { # why was this append? sysopen(OUT, $tmp, O_WRONLY | O_EXCL | O_CREAT, 0600) or die ("Can't open $tmp: $!"); Pod::Text->new()->parse_from_file($file,\*OUT); close OUT or die "can't close $tmp: $!"; } 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 = $?)) { # why was this append? sysopen(TMP, $tmp, O_WRONLY | O_EXCL | O_CREAT, 0600) or die "Can't open $tmp: $!"; print TMP $rslt or die "Can't print $tmp: $!"; close TMP or die "Can't close $tmp: $!"; } } if ($opt_u or $err or -z $tmp) { # XXX: race with -z # why was this append? sysopen(OUT, $tmp, O_WRONLY | O_EXCL | O_CREAT, 0600) or die "Can't open $tmp: $!"; open(IN,"<", $file) or die("Can't open $file: $!"); my $cut = 1; local $_; while () { $cut = $1 eq 'cut' if /^=(\w+)/; next if $cut; print OUT or die "Can't print $tmp: $!"; } close IN or die "Can't close $file: $!"; close OUT or die "Can't close $tmp: $!"; } } sub page { my ($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 { foreach my $pager (@pagers) { if ($Is_VMS) { last if system("$pager $tmp") == 0; # quoting prevents logical expansion } else { last if system("$pager \"$tmp\"") == 0; } } } } sub cleanup { my @files = @_; for (@files) { if ($Is_VMS) { 1 while unlink($_); # XXX: expect failure } else { unlink($_); # or die "Can't unlink $_: $!"; } } } my @found; foreach (@pages) { if ($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; } close(PODIDX) or die "Can't close $podidx: $!"; next; } print STDERR "Searching for $_\n" if $opt_v; # We must look both in @INC for library modules and in $bindir # for executables, like h2xs or perldoc itself. my @searchdirs = ($bindir, @INC); if ($opt_F) { next unless -r; push @found, $_ if $opt_m or containspod($_); next; } unless ($opt_m) { if ($Is_VMS) { my($i,$trn); for ($i = 0; $trn = $ENV{'DCL$PATH;'.$i}; $i++) { push(@searchdirs,$trn); } push(@searchdirs,'perl_root:[lib.pod]') # installed pods } 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 $opt_v; } else { print STDERR "No documentation found for \"$_\".\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: $!"; } } } } push(@found,@files); } if (!@found) { exit ($Is_VMS ? 98962 : 1); } if ($opt_l) { print join("\n", @found), "\n"; exit; } my $lines = $ENV{LINES} || 24; my $no_tty; if (! -t STDOUT) { $no_tty = 1 } END { close(STDOUT) || die "Can't close STDOUT: $!" } # until here we could simply exit or die # now we create temporary files that we have to clean up # namely $tmp, $buffer # that's because you did it wrong, should be descriptor based --tchrist my $tmp; my $buffer; if ($Is_MSWin32) { $tmp = "$ENV{TEMP}\\perldoc1.$$"; $buffer = "$ENV{TEMP}\\perldoc1.b$$"; push @pagers, qw( more< less notepad ); unshift @pagers, $ENV{PAGER} if $ENV{PAGER}; for (@found) { s,/,\\,g } } elsif ($Is_VMS) { $tmp = 'Sys$Scratch:perldoc.tmp1_'.$$; $buffer = 'Sys$Scratch:perldoc.tmp1_b'.$$; push @pagers, qw( most more less type/page ); } elsif ($Is_Dos) { $tmp = "$ENV{TEMP}/perldoc1.$$"; $buffer = "$ENV{TEMP}/perldoc1.b$$"; $tmp =~ tr!\\/!//!s; $buffer =~ tr!\\/!//!s; push @pagers, qw( less.exe more.com< ); unshift @pagers, $ENV{PAGER} if $ENV{PAGER}; } else { if ($^O eq 'os2') { require POSIX; $tmp = POSIX::tmpnam(); $buffer = POSIX::tmpnam(); unshift @pagers, 'less', 'cmd /c more <'; } else { # XXX: this is not secure, because it doesn't open it ($tmp, $buffer) = eval { require POSIX } ? (POSIX::tmpnam(), POSIX::tmpnam() ) : ("/tmp/perldoc1.$$", "/tmp/perldoc1.b$$" ); } push @pagers, qw( more less pg view cat ); unshift @pagers, $ENV{PAGER} if $ENV{PAGER}; } unshift @pagers, $ENV{PERLDOC_PAGER} if $ENV{PERLDOC_PAGER}; # make sure cleanup called eval q{ sub END { cleanup($tmp, $buffer) } 1; } || die; # exit/die in a windows sighandler is dangerous, so let it do the # default thing, which is to exit eval q{ use sigtrap qw(die INT TERM HUP QUIT) } unless $^O eq 'MSWin32'; if ($opt_m) { 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: $!"); # 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/; } # 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_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}++; } elsif (/^=head2/) { $found = 0; } next unless $found; push @pod, $_; } if (!@pod) { die("No documentation for perl FAQ keyword `$opt_q' found\n"); } } my $filter; if (@pod) { sysopen(TMP, $buffer, O_WRONLY | O_EXCL | O_CREAT) or die("Can't open $buffer: $!"); print TMP "=over 8\n\n"; print TMP @pod or die "Can't print $buffer: $!"; print TMP "=back\n"; close TMP or die "Can't close $buffer: $!"; @found = $buffer; $filter = 1; } foreach (@found) { printout($_, $tmp, $filter); } page($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; } sub am_taint_checking { my($k,$v) = each %ENV; return is_tainted($v); } __END__ =head1 NAME perldoc - Look up Perl documentation in pod format. =head1 SYNOPSIS B [B<-h>] [B<-v>] [B<-t>] [B<-u>] [B<-m>] [B<-l>] [B<-F>] [B<-X>] PageName|ModuleName|ProgramName B B<-f> BuiltinFunction B B<-q> FAQ Keyword =head1 DESCRIPTION I looks up a piece of documentation in .pod format that is embedded in the perl installation tree or in a perl script, and displays it via C. (In addition, if running under HP-UX, C will be used.) This is primarily used for the documentation for the perl library modules. Your system may also have man pages installed for those modules, in which case you can probably just use the man(1) command. =head1 OPTIONS =over 5 =item B<-h> help Prints out a brief help message. =item B<-v> verbose Describes search for the item in detail. =item B<-t> text output Display docs using plain text converter, instead of nroff. This may be faster, but it won't look as nice. =item B<-u> unformatted Find docs only; skip reformatting by pod2* =item B<-m> module Display the entire module: both code and unformatted pod documentation. This may be useful if the docs don't explain a function in the detail you need, and you'd like to inspect the code directly; perldoc will find the file for you and simply hand it off for display. =item B<-l> file name only Display the file name of the module found. =item B<-F> file names Consider arguments as file names, no search in directories will be performed. =item B<-f> perlfunc The B<-f> option followed by the name of a perl built in function will extract the documentation of this function from L. =item B<-q> perlfaq The B<-q> option takes a regular expression as an argument. It will search the question headings in perlfaq[1-9] and print the entries matching the regular expression. =item B<-X> use an index if present The B<-X> option looks for a entry whose basename matches the name given on the command line in the file C<$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 relinguish 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 may 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. =back =head1 ENVIRONMENT 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 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 , 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 # -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 # -added better error recognition (on no found pages, just exit. On # missing nroff/pod2man, just display raw pod.) # -added recursive/case-insensitive matching (thanks, Andreas). This # slows things down a bit, unfortunately. Give a precise name, and # it'll run faster. # # Version 1.01: Tue May 30 14:47:34 EDT 1995 # Andy Dougherty # -added pod documentation. # -added PATH searching. # -added searching pod/ subdirectory (mainly to pick up perlfunc.pod # and friends. # # # TODO: # # Cache directories read during sloppy match