X-Git-Url: http://git.shadowcat.co.uk/gitweb/gitweb.cgi?a=blobdiff_plain;f=utils%2Fperldoc.PL;h=cfb773e6ffe9c1b9afcde01de777ffb35f15932e;hb=41f4651c3a21976c2a7025d67365a484c22412d6;hp=875cd25144be56cea3d95a79b0a2c72a070f65a7;hpb=c5ae3962d54254e9f1e8f5fe2185346837ccf5da;p=p5sagit%2Fp5-mst-13.2.git diff --git a/utils/perldoc.PL b/utils/perldoc.PL index 875cd25..cfb773e 100644 --- a/utils/perldoc.PL +++ b/utils/perldoc.PL @@ -30,45 +30,64 @@ $Config{startperl} eval 'exec $Config{perlpath} -S \$0 \${1+"\$@"}' if 0; +use warnings; use strict; + +# make sure creat()s are neither too much nor too little +INIT { eval { umask(0077) } } # doubtless someone has no mask + +(my \$pager = <<'/../') =~ s/\\s*\\z//; +$Config{pager} +/../ my \@pagers = (); -push \@pagers, "$Config{'pager'}" if -x "$Config{'pager'}"; +push \@pagers, \$pager if -x \$pager; + +(my \$bindir = <<'/../') =~ s/\\s*\\z//; +$Config{scriptdir} +/../ + !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) { +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( $opt_X ) { +if ($opt_X) { $podidx = "$Config{'archlib'}/pod.idx"; $podidx = "" unless -f $podidx && -r _ && -M _ <= 7; } -if( (my $opts = do{ local $^W; $opt_t + $opt_u + $opt_m + $opt_l }) > 1) { +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) { - $opt_t = 1 unless $opts +} +elsif ($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; + @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: $!"; return 0; } sub minus_f_nocase { my($dir,$file) = @_; - my $path = join('/',$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 + # on a case-forgiving file system or if case is important # that is it all we can do - warn "Ignored $file: unreadable\n" if -f _; + 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 (split(/\//, $file)){ - my $try = "@p/$p"; + foreach $p (splitdir $file){ + my $try = catfile @p, $p; stat $try; - if (-d _){ + if (-d _) { push @p, $p; if ( $p eq $global_target) { - my $tmp_path = join ('/', @p); + my $tmp_path = catfile @p; my $path_f = 0; for (@global_found) { $path_f = 1 if $_ eq $tmp_path; @@ -209,36 +261,41 @@ 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 $file: unreadable\n" if -f _; + warn "Ignored @p: unreadable\n" if -f _; } } return ""; } - + sub check_file { my($dir,$file) = @_; + return "" if length $dir and not -d $dir; if ($opt_m) { return minus_f_nocase($dir,$file); - } else { + } + else { my $path = minus_f_nocase($dir,$file); return $path if length $path and containspod($path); } @@ -255,35 +312,38 @@ 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 $Is_VMS; + ($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 + 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); } @@ -291,73 +351,158 @@ 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 $data[-1] =~ /^\w/; # Skip footer, like + # 28/Jan/99 perl 5.005, patch 53 1 + join "\n\n", @data; +} + +sub printout { + my ($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 = $_; - local($_); - $searchfor =~ s,::,/,g; - print STDERR "Searching for '$searchfor' in $podidx\n" if $opt_v; - while () { - chomp; - push(@found, $_) if m,/$searchfor(?:\.(?:pod|pm))?$,i; - } - close(PODIDX); - next; - } - print STDERR "Searching for $_\n" if $opt_v; - # We must look both in @INC for library modules and in PATH - # for executables, like h2xs or perldoc itself. - my @searchdirs = @INC; - if ($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); - } - push(@searchdirs,'perl_root:[lib.pod]') # installed pods - } 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; + # 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 } - my @files = searchfor(0,$_,@searchdirs); - 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 $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, $dir) or die "$!"; - while (my $file = readdir(DIR)) { - next if ($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 $opt_v; + } + else { + print STDERR "No documentation found for \"$_\".\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) { @@ -368,172 +513,184 @@ if ($opt_l) { my $lines = $ENV{LINES} || 24; my $no_tty; -if( ! -t STDOUT ) { $no_tty = 1 } +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.$$"; - push @pagers, qw( more< less notepad ); - unshift @pagers, $ENV{PAGER} if $ENV{PAGER}; -} elsif ($Is_VMS) { - $tmp = 'Sys$Scratch:perldoc.tmp1_'.$$; - push @pagers, qw( most more less type/page ); -} elsif ($Is_Dos) { - $tmp = "$ENV{TEMP}/perldoc1.$$"; - $tmp =~ tr!\\/!//!s; - push @pagers, qw( less.exe more.com< ); - unshift @pagers, $ENV{PAGER} if $ENV{PAGER}; -} else { - if ($^O eq 'os2') { - require POSIX; - $tmp = POSIX::tmpnam(); - unshift @pagers, 'less', 'cmd /c more <'; - } else { - $tmp = "/tmp/perldoc1.$$"; - } - push @pagers, qw( more less pg view cat ); - unshift @pagers, $ENV{PAGER} if $ENV{PAGER}; + $tmp = "$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 $pager (@pagers) { - system("$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); - } elsif (@pod < $lines-2) { - print @pod; - } else { - foreach my $pager (@pagers) { - open (PAGER, "| $pager") or next; - print PAGER @pod ; - close(PAGER) or next; - last; - } - } - } else { - die "No documentation for perl function `$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/; + } + + # 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 $found = 0; - my %found_in; - my @pod; - - while (<>) { - if (/^=head2\s+.*$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, $_; - } - - if (@pod) { - if ($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); - } elsif (@pod < $lines-2) { - print @pod; - } else { - foreach my $pager (@pagers) { - open (PAGER, "| $pager") or next; - print PAGER @pod ; - close(PAGER) or next; - last; - } - } - } else { - die "No documentation for perl FAQ keyword `$opt_q' found\n"; - } - exit; + 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"); + } } -foreach (@found) { +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; +} - my $err; - if($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/; - my $rslt = `$cmd`; - unless(($err = $?)) { - open(TMP,">>$tmp"); - print TMP $rslt; - close TMP; - } - } - - if( $opt_u or $err or -z $tmp) { - open(OUT,">>$tmp"); - open(IN,"<$_"); - my $cut = 1; - while () { - $cut = $1 eq 'cut' if /^=(\w+)/; - next if $cut; - print OUT; - } - close(IN); - close(OUT); - } +foreach (@found) { + printout($_, $tmp, $filter); } +page($tmp, $no_tty, @pagers); -if( $no_tty ) { - open(TMP,"<$tmp"); - print while ; - close(TMP); -} else { - foreach my $pager (@pagers) { - system("$pager $tmp") or last; - } +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__ @@ -613,11 +770,20 @@ 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 make also give a +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. @@ -626,7 +792,7 @@ name, you will only get the first one. =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. @@ -636,29 +802,51 @@ 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 +# 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