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find-doc-nits revision 1.1.1.1.4.1 
      1 #! /usr/bin/env perl
      2 # Copyright 2002-2019 The OpenSSL Project Authors. All Rights Reserved.
      3 #
      4 # Licensed under the OpenSSL license (the "License").  You may not use
      5 # this file except in compliance with the License.  You can obtain a copy
      6 # in the file LICENSE in the source distribution or at
      7 # https://www.openssl.org/source/license.html
      8 
      9 
     10 require 5.10.0;
     11 use warnings;
     12 use strict;
     13 use Pod::Checker;
     14 use File::Find;
     15 use File::Basename;
     16 use File::Spec::Functions;
     17 use Getopt::Std;
     18 use lib catdir(dirname($0), "perl");
     19 use OpenSSL::Util::Pod;
     20 
     21 # Options.
     22 our($opt_d);
     23 our($opt_h);
     24 our($opt_l);
     25 our($opt_n);
     26 our($opt_p);
     27 our($opt_u);
     28 our($opt_c);
     29 
     30 sub help()
     31 {
     32     print <<EOF;
     33 Find small errors (nits) in documentation.  Options:
     34     -d Detailed list of undocumented (implies -u)
     35     -l Print bogus links
     36     -n Print nits in POD pages
     37     -p Warn if non-public name documented (implies -n)
     38     -u List undocumented functions
     39     -h Print this help message
     40     -c List undocumented commands and options
     41 EOF
     42     exit;
     43 }
     44 
     45 my $temp = '/tmp/docnits.txt';
     46 my $OUT;
     47 my %public;
     48 
     49 my %mandatory_sections =
     50     ( '*'    => [ 'NAME', 'DESCRIPTION', 'COPYRIGHT' ],
     51       1      => [ 'SYNOPSIS', 'OPTIONS' ],
     52       3      => [ 'SYNOPSIS', 'RETURN VALUES' ],
     53       5      => [ ],
     54       7      => [ ] );
     55 
     56 # Cross-check functions in the NAME and SYNOPSIS section.
     57 sub name_synopsis()
     58 {
     59     my $id = shift;
     60     my $filename = shift;
     61     my $contents = shift;
     62 
     63     # Get NAME section and all words in it.
     64     return unless $contents =~ /=head1 NAME(.*)=head1 SYNOPSIS/ms;
     65     my $tmp = $1;
     66     $tmp =~ tr/\n/ /;
     67     print "$id trailing comma before - in NAME\n" if $tmp =~ /, *-/;
     68     $tmp =~ s/ -.*//g;
     69     $tmp =~ s/  */ /g;
     70     print "$id missing comma in NAME\n" if $tmp =~ /[^,] /;
     71     $tmp =~ s/,//g;
     72 
     73     my $dirname = dirname($filename);
     74     my $simplename = basename($filename);
     75     $simplename =~ s/.pod$//;
     76     my $foundfilename = 0;
     77     my %foundfilenames = ();
     78     my %names;
     79     foreach my $n ( split ' ', $tmp ) {
     80         $names{$n} = 1;
     81         $foundfilename++ if $n eq $simplename;
     82         $foundfilenames{$n} = 1
     83             if -f "$dirname/$n.pod" && $n ne $simplename;
     84     }
     85     print "$id the following exist as other .pod files:\n",
     86         join(" ", sort keys %foundfilenames), "\n"
     87         if %foundfilenames;
     88     print "$id $simplename (filename) missing from NAME section\n"
     89         unless $foundfilename;
     90     foreach my $n ( keys %names ) {
     91         print "$id $n is not public\n"
     92             if $opt_p and !defined $public{$n};
     93     }
     94 
     95     # Find all functions in SYNOPSIS
     96     return unless $contents =~ /=head1 SYNOPSIS(.*)=head1 DESCRIPTION/ms;
     97     my $syn = $1;
     98     foreach my $line ( split /\n+/, $syn ) {
     99         my $sym;
    100         $line =~ s/STACK_OF\([^)]+\)/int/g;
    101         $line =~ s/__declspec\([^)]+\)//;
    102         if ( $line =~ /env (\S*)=/ ) {
    103             # environment variable env NAME=...
    104             $sym = $1;
    105         } elsif ( $line =~ /typedef.*\(\*(\S+)\)\(.*/ ) {
    106             # a callback function pointer: typedef ... (*NAME)(...
    107             $sym = $1;
    108         } elsif ( $line =~ /typedef.* (\S+)\(.*/ ) {
    109             # a callback function signature: typedef ... NAME(...
    110             $sym = $1;
    111         } elsif ( $line =~ /typedef.* (\S+);/ ) {
    112             # a simple typedef: typedef ... NAME;
    113             $sym = $1;
    114         } elsif ( $line =~ /enum (\S*) \{/ ) {
    115             # an enumeration: enum ... {
    116             $sym = $1;
    117         } elsif ( $line =~ /#define ([A-Za-z0-9_]+)/ ) {
    118             $sym = $1;
    119         } elsif ( $line =~ /([A-Za-z0-9_]+)\(/ ) {
    120             $sym = $1;
    121         }
    122         else {
    123             next;
    124         }
    125         print "$id $sym missing from NAME section\n"
    126             unless defined $names{$sym};
    127         $names{$sym} = 2;
    128 
    129         # Do some sanity checks on the prototype.
    130         print "$id prototype missing spaces around commas: $line\n"
    131             if ( $line =~ /[a-z0-9],[^ ]/ );
    132     }
    133 
    134     foreach my $n ( keys %names ) {
    135         next if $names{$n} == 2;
    136         print "$id $n missing from SYNOPSIS\n";
    137     }
    138 }
    139 
    140 # Check if SECTION is located before BEFORE
    141 sub check_section_location()
    142 {
    143     my $filename = shift;
    144     my $contents = shift;
    145     my $section = shift;
    146     my $before = shift;
    147 
    148     return unless $contents =~ /=head1 $section/
    149         and $contents =~ /=head1 $before/;
    150     print "$filename: $section should be placed before $before section\n"
    151         if $contents =~ /=head1 $before.*=head1 $section/ms;
    152 }
    153 
    154 sub check()
    155 {
    156     my $filename = shift;
    157     my $dirname = basename(dirname($filename));
    158 
    159     my $contents = '';
    160     {
    161         local $/ = undef;
    162         open POD, $filename or die "Couldn't open $filename, $!";
    163         $contents = <POD>;
    164         close POD;
    165     }
    166 
    167     # Check if EXAMPLES is located after RETURN VALUES section.
    168     &check_section_location($filename, $contents, "RETURN VALUES", "EXAMPLES") if $filename =~ m|man3/|;
    169     # Check if HISTORY is located after SEE ALSO
    170     &check_section_location($filename, $contents, "SEE ALSO", "HISTORY") if $filename =~ m|man3/|;
    171     # Check if SEE ALSO is located after EXAMPLES
    172     &check_section_location($filename, $contents, "EXAMPLES", "SEE ALSO") if $filename =~ m|man3/|;
    173 
    174     my $id = "${filename}:1:";
    175 
    176     &name_synopsis($id, $filename, $contents)
    177         unless $contents =~ /=for comment generic/
    178             or $filename =~ m@man[157]/@;
    179 
    180     print "$id doesn't start with =pod\n"
    181         if $contents !~ /^=pod/;
    182     print "$id doesn't end with =cut\n"
    183         if $contents !~ /=cut\n$/;
    184     print "$id more than one cut line.\n"
    185         if $contents =~ /=cut.*=cut/ms;
    186     print "$id missing copyright\n"
    187         if $contents !~ /Copyright .* The OpenSSL Project Authors/;
    188     print "$id copyright not last\n"
    189         if $contents =~ /head1 COPYRIGHT.*=head/ms;
    190     print "$id head2 in All uppercase\n"
    191         if $contents =~ /head2\s+[A-Z ]+\n/;
    192     print "$id extra space after head\n"
    193         if $contents =~ /=head\d\s\s+/;
    194     print "$id period in NAME section\n"
    195         if $contents =~ /=head1 NAME.*\.\n.*=head1 SYNOPSIS/ms;
    196     print "$id POD markup in NAME section\n"
    197         if $contents =~ /=head1 NAME.*[<>].*=head1 SYNOPSIS/ms;
    198     print "$id Duplicate $1 in L<>\n"
    199         if $contents =~ /L<([^>]*)\|([^>]*)>/ && $1 eq $2;
    200     print "$id Bad =over $1\n"
    201         if $contents =~ /=over([^ ][^24])/;
    202     print "$id Possible version style issue\n"
    203         if $contents =~ /OpenSSL version [019]/;
    204 
    205     if ( $contents !~ /=for comment multiple includes/ ) {
    206         # Look for multiple consecutive openssl #include lines
    207         # (non-consecutive lines are okay; see man3/MD5.pod).
    208         if ( $contents =~ /=head1 SYNOPSIS(.*)=head1 DESCRIPTION/ms ) {
    209             my $count = 0;
    210             foreach my $line ( split /\n+/, $1 ) {
    211                 if ( $line =~ m@include <openssl/@ ) {
    212                     print "$id has multiple includes\n" if ++$count == 2;
    213                 } else {
    214                     $count = 0;
    215                 }
    216             }
    217         }
    218     }
    219 
    220     open my $OUT, '>', $temp
    221         or die "Can't open $temp, $!";
    222     podchecker($filename, $OUT);
    223     close $OUT;
    224     open $OUT, '<', $temp
    225         or die "Can't read $temp, $!";
    226     while ( <$OUT> ) {
    227         next if /\(section\) in.*deprecated/;
    228         print;
    229     }
    230     close $OUT;
    231     unlink $temp || warn "Can't remove $temp, $!";
    232 
    233     # Find what section this page is in; assume 3.
    234     my $section = 3;
    235     $section = $1 if $dirname =~ /man([1-9])/;
    236 
    237     foreach ((@{$mandatory_sections{'*'}}, @{$mandatory_sections{$section}})) {
    238         # Skip "return values" if not -s
    239         print "$id: missing $_ head1 section\n"
    240             if $contents !~ /^=head1\s+${_}\s*$/m;
    241     }
    242 }
    243 
    244 my %dups;
    245 
    246 sub parsenum()
    247 {
    248     my $file = shift;
    249     my @apis;
    250 
    251     open my $IN, '<', $file
    252         or die "Can't open $file, $!, stopped";
    253 
    254     while ( <$IN> ) {
    255         next if /^#/;
    256         next if /\bNOEXIST\b/;
    257         next if /\bEXPORT_VAR_AS_FUNC\b/;
    258         my @fields = split();
    259         die "Malformed line $_"
    260             if scalar @fields != 2 && scalar @fields != 4;
    261         push @apis, $fields[0];
    262     }
    263 
    264     close $IN;
    265 
    266     print "# Found ", scalar(@apis), " in $file\n" unless $opt_p;
    267     return sort @apis;
    268 }
    269 
    270 sub getdocced()
    271 {
    272     my $dir = shift;
    273     my %return;
    274 
    275     foreach my $pod ( glob("$dir/*.pod") ) {
    276         my %podinfo = extract_pod_info($pod);
    277         foreach my $n ( @{$podinfo{names}} ) {
    278             $return{$n} = $pod;
    279             print "# Duplicate $n in $pod and $dups{$n}\n"
    280                 if defined $dups{$n} && $dups{$n} ne $pod;
    281             $dups{$n} = $pod;
    282         }
    283     }
    284 
    285     return %return;
    286 }
    287 
    288 my %docced;
    289 
    290 sub checkmacros()
    291 {
    292     my $count = 0;
    293 
    294     print "# Checking macros (approximate)\n";
    295     foreach my $f ( glob('include/openssl/*.h') ) {
    296         # Skip some internals we don't want to document yet.
    297         next if $f eq 'include/openssl/asn1.h';
    298         next if $f eq 'include/openssl/asn1t.h';
    299         next if $f eq 'include/openssl/err.h';
    300         open(IN, $f) || die "Can't open $f, $!";
    301         while ( <IN> ) {
    302             next unless /^#\s*define\s*(\S+)\(/;
    303             my $macro = $1;
    304             next if $docced{$macro};
    305             next if $macro =~ /i2d_/
    306                 || $macro =~ /d2i_/
    307                 || $macro =~ /DEPRECATEDIN/
    308                 || $macro =~ /IMPLEMENT_/
    309                 || $macro =~ /DECLARE_/;
    310             print "$f:$macro\n" if $opt_d;
    311             $count++;
    312         }
    313         close(IN);
    314     }
    315     print "# Found $count macros missing (not all should be documented)\n"
    316 }
    317 
    318 sub printem()
    319 {
    320     my $libname = shift;
    321     my $numfile = shift;
    322     my $count = 0;
    323 
    324     foreach my $func ( &parsenum($numfile) ) {
    325         next if $docced{$func};
    326 
    327         # Skip ASN1 utilities
    328         next if $func =~ /^ASN1_/;
    329 
    330         print "$libname:$func\n" if $opt_d;
    331         $count++;
    332     }
    333     print "# Found $count missing from $numfile\n\n";
    334 }
    335 
    336 
    337 # Collection of links in each POD file.
    338 # filename => [ "foo(1)", "bar(3)", ... ]
    339 my %link_collection = ();
    340 # Collection of names in each POD file.
    341 # "name(s)" => filename
    342 my %name_collection = ();
    343 
    344 sub collectnames {
    345     my $filename = shift;
    346     $filename =~ m|man(\d)/|;
    347     my $section = $1;
    348     my $simplename = basename($filename, ".pod");
    349     my $id = "${filename}:1:";
    350 
    351     my $contents = '';
    352     {
    353         local $/ = undef;
    354         open POD, $filename or die "Couldn't open $filename, $!";
    355         $contents = <POD>;
    356         close POD;
    357     }
    358 
    359     $contents =~ /=head1 NAME([^=]*)=head1 /ms;
    360     my $tmp = $1;
    361     unless (defined $tmp) {
    362         print "$id weird name section\n";
    363         return;
    364     }
    365     $tmp =~ tr/\n/ /;
    366     $tmp =~ s/-.*//g;
    367 
    368     my @names = map { s/\s+//g; $_ } split(/,/, $tmp);
    369     unless (grep { $simplename eq $_ } @names) {
    370         print "$id missing $simplename\n";
    371         push @names, $simplename;
    372     }
    373     foreach my $name (@names) {
    374         next if $name eq "";
    375         my $name_sec = "$name($section)";
    376         if (! exists $name_collection{$name_sec}) {
    377             $name_collection{$name_sec} = $filename;
    378         } else { #elsif ($filename ne $name_collection{$name_sec}) {
    379             print "$id $name_sec also in $name_collection{$name_sec}\n";
    380         }
    381     }
    382 
    383     my @foreign_names =
    384         map { map { s/\s+//g; $_ } split(/,/, $_) }
    385         $contents =~ /=for\s+comment\s+foreign\s+manuals:\s*(.*)\n\n/;
    386     foreach (@foreign_names) {
    387         $name_collection{$_} = undef; # It still exists!
    388     }
    389 
    390     my @links = $contents =~ /L<
    391                               # if the link is of the form L<something|name(s)>,
    392                               # then remove 'something'.  Note that 'something'
    393                               # may contain POD codes as well...
    394                               (?:(?:[^\|]|<[^>]*>)*\|)?
    395                               # we're only interested in references that have
    396                               # a one digit section number
    397                               ([^\/>\(]+\(\d\))
    398                              /gx;
    399     $link_collection{$filename} = [ @links ];
    400 }
    401 
    402 sub checklinks {
    403     foreach my $filename (sort keys %link_collection) {
    404         foreach my $link (@{$link_collection{$filename}}) {
    405             print "${filename}:1: reference to non-existing $link\n"
    406                 unless exists $name_collection{$link};
    407         }
    408     }
    409 }
    410 
    411 sub publicize() {
    412     foreach my $name ( &parsenum('util/libcrypto.num') ) {
    413         $public{$name} = 1;
    414     }
    415     foreach my $name ( &parsenum('util/libssl.num') ) {
    416         $public{$name} = 1;
    417     }
    418     foreach my $name ( &parsenum('util/private.num') ) {
    419         $public{$name} = 1;
    420     }
    421 }
    422 
    423 my %skips = (
    424     'aes128' => 1,
    425     'aes192' => 1,
    426     'aes256' => 1,
    427     'aria128' => 1,
    428     'aria192' => 1,
    429     'aria256' => 1,
    430     'camellia128' => 1,
    431     'camellia192' => 1,
    432     'camellia256' => 1,
    433     'des' => 1,
    434     'des3' => 1,
    435     'idea' => 1,
    436     '[cipher]' => 1,
    437     '[digest]' => 1,
    438 );
    439 
    440 sub checkflags() {
    441     my $cmd = shift;
    442     my %cmdopts;
    443     my %docopts;
    444     my $ok = 1;
    445 
    446     # Get the list of options in the command.
    447     open CFH, "./apps/openssl list --options $cmd|"
    448         || die "Can list options for $cmd, $!";
    449     while ( <CFH> ) {
    450         chop;
    451         s/ .$//;
    452         $cmdopts{$_} = 1;
    453     }
    454     close CFH;
    455 
    456     # Get the list of flags from the synopsis
    457     open CFH, "<doc/man1/$cmd.pod"
    458         || die "Can't open $cmd.pod, $!";
    459     while ( <CFH> ) {
    460         chop;
    461         last if /DESCRIPTION/;
    462         next unless /\[B<-([^ >]+)/;
    463         $docopts{$1} = 1;
    464     }
    465     close CFH;
    466 
    467     # See what's in the command not the manpage.
    468     my @undocced = ();
    469     foreach my $k ( keys %cmdopts ) {
    470         push @undocced, $k unless $docopts{$k};
    471     }
    472     if ( scalar @undocced > 0 ) {
    473         $ok = 0;
    474         foreach ( @undocced ) {
    475             print "doc/man1/$cmd.pod: Missing -$_\n";
    476         }
    477     }
    478 
    479     # See what's in the command not the manpage.
    480     my @unimpl = ();
    481     foreach my $k ( keys %docopts ) {
    482         push @unimpl, $k unless $cmdopts{$k};
    483     }
    484     if ( scalar @unimpl > 0 ) {
    485         $ok = 0;
    486         foreach ( @unimpl ) {
    487             next if defined $skips{$_};
    488             print "doc/man1/$cmd.pod: Not implemented -$_\n";
    489         }
    490     }
    491 
    492     return $ok;
    493 }
    494 
    495 getopts('cdlnphu');
    496 
    497 &help() if $opt_h;
    498 $opt_n = 1 if $opt_p;
    499 $opt_u = 1 if $opt_d;
    500 
    501 die "Need one of -[cdlnpu] flags.\n"
    502     unless $opt_c or $opt_l or $opt_n or $opt_u;
    503 
    504 if ( $opt_c ) {
    505     my $ok = 1;
    506     my @commands = ();
    507 
    508     # Get list of commands.
    509     open FH, "./apps/openssl list -1 -commands|"
    510         || die "Can't list commands, $!";
    511     while ( <FH> ) {
    512         chop;
    513         push @commands, $_;
    514     }
    515     close FH;
    516 
    517     # See if each has a manpage.
    518     foreach ( @commands ) {
    519         next if $_ eq 'help' || $_ eq 'exit';
    520         if ( ! -f "doc/man1/$_.pod" ) {
    521             print "doc/man1/$_.pod does not exist\n";
    522             $ok = 0;
    523         } else {
    524             $ok = 0 if not &checkflags($_);
    525         }
    526     }
    527 
    528     # See what help is missing.
    529     open FH, "./apps/openssl list --missing-help |"
    530         || die "Can't list missing help, $!";
    531     while ( <FH> ) {
    532         chop;
    533         my ($cmd, $flag) = split;
    534         print "$cmd has no help for -$flag\n";
    535         $ok = 0;
    536     }
    537     close FH;
    538 
    539     exit 1 if not $ok;
    540 }
    541 
    542 if ( $opt_l ) {
    543     foreach (@ARGV ? @ARGV : glob('doc/*/*.pod')) {
    544         collectnames($_);
    545     }
    546     checklinks();
    547 }
    548 
    549 if ( $opt_n ) {
    550     &publicize() if $opt_p;
    551     foreach (@ARGV ? @ARGV : glob('doc/*/*.pod')) {
    552         &check($_);
    553     }
    554 }
    555 
    556 if ( $opt_u ) {
    557     my %temp = &getdocced('doc/man3');
    558     foreach ( keys %temp ) {
    559         $docced{$_} = $temp{$_};
    560     }
    561     &printem('crypto', 'util/libcrypto.num');
    562     &printem('ssl', 'util/libssl.num');
    563     &checkmacros();
    564 }
    565 
    566 exit;
    567