3 # Build log hardening check, checks build logs for missing hardening flags.
5 # Copyright (C) 2012 Simon Ruderich
7 # This program is free software: you can redistribute it and/or modify
8 # it under the terms of the GNU General Public License as published by
9 # the Free Software Foundation, either version 3 of the License, or
10 # (at your option) any later version.
12 # This program is distributed in the hope that it will be useful,
13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 # GNU General Public License for more details.
17 # You should have received a copy of the GNU General Public License
18 # along with this program. If not, see <http://www.gnu.org/licenses/>.
25 use Text::ParseWords ();
27 our $VERSION = '0.01';
32 # Regex to catch compiler commands.
34 (?<!\.)(?:cc|gcc|g\+\+|c\+\+)
37 # Full regex which matches the complete compiler name. Used in a few places to
38 # prevent false negatives.
39 my $cc_regex_full = qr/
40 (?:[a-z0-9_]+-(?:linux-|kfreebsd-)?gnu(?:eabi|eabihf)?-)?
43 # Regex to catch (GCC) compiler warnings.
44 my $warning_regex = qr/^(.+?):([0-9]+):[0-9]+: warning: (.+?) \[(.+?)\]$/;
46 # List of source file extensions which require preprocessing.
47 my @source_preprocess_compile_cpp = (
49 qw( cc cp cxx cpp CPP c++ C ),
53 my @source_preprocess_compile = (
59 @source_preprocess_compile_cpp,
61 qw( F FOR fpp FPP FTN F90 F95 F03 F08 ),
63 my @source_preprocess_no_compile = (
67 my @source_preprocess = (
68 @source_preprocess_compile,
69 @source_preprocess_no_compile,
71 # List of source file extensions which don't require preprocessing.
72 my @source_no_preprocess_compile_cpp = (
78 my @source_no_preprocess_compile = (
82 @source_no_preprocess_compile_cpp,
86 qw( f for ftn f90 f95 f03 f08 ),
88 my @source_no_preprocess_no_compile = (
92 my @source_no_preprocess = (
93 @source_no_preprocess_compile,
94 @source_no_preprocess_no_compile,
96 # List of header file extensions which require preprocessing.
97 my @header_preprocess = (
98 # C, C++, Objective-C, Objective-C++
101 qw( hh H hp hxx hpp HPP h++ tcc ),
104 # Hashes for fast extensions lookup to check if a file falls in one of these
106 my %extensions_no_preprocess = map { $_ => 1 } (
107 @source_no_preprocess,
109 my %extensions_preprocess = map { $_ => 1 } (
113 my %extensions_compile_link = map { $_ => 1 } (
115 @source_no_preprocess,
117 my %extensions_compile = map { $_ => 1 } (
118 @source_preprocess_compile,
119 @source_no_preprocess_compile,
121 my %extensions_no_compile = map { $_ => 1 } (
122 @source_preprocess_no_compile,
123 @source_no_preprocess_no_compile,
125 my %extensions_compile_cpp = map { $_ => 1 } (
126 @source_preprocess_compile_cpp,
127 @source_no_preprocess_compile_cpp,
129 my %extension = map { $_ => 1 } (
130 @source_no_preprocess,
135 # Regexp to match file extensions.
136 my $file_extension_regex = qr/
138 \S+ # Filename without extension.
140 ([^\/\\.,;:\s]+)# File extension.
141 (?=\s|\\) # At end of word. Can't use \b because some files have non
142 # word characters at the end and because \b matches double
143 # extensions (like .cpp.o). Works always as all lines are
144 # terminated with "\n".
147 # Expected (hardening) flags. All flags are used as regexps.
152 my @def_cflags_format = (
155 '-Werror=format-security',
157 my @def_cflags_fortify = (
158 # fortify needs at least -O1, but -O2 is recommended anyway
160 my @def_cflags_stack = (
162 '--param=ssp-buffer-size=4',
164 my @def_cflags_pie = (
170 # @def_cxxflags_* is the same as @def_cflags_*.
171 my @def_cppflags = ();
172 my @def_cppflags_fortify = (
173 '-D_FORTIFY_SOURCE=2',
175 my @def_ldflags = ();
176 my @def_ldflags_relro = (
179 my @def_ldflags_bindnow = (
182 my @def_ldflags_pie = (
186 my @def_ldflags_pic = (
191 # Renaming rules for the output so the regex parts are not visible. Also
192 # stores string values of flag regexps above, see compile_flag_regexp().
194 '-O(?:2|3)' => '-O2',
195 '-Wl,(?:-z,)?relro' => '-Wl,-z,relro',
196 '-Wl,(?:-z,)?now' => '-Wl,-z,now',
200 no_compiler_commands => 1 << 0,
201 # used by POD::Usage => 1 << 1,
202 non_verbose_build => 1 << 2,
203 flags_missing => 1 << 3,
204 hardening_wrapper => 1 << 4,
205 invalid_cmake => 1 << 5,
208 # Statistics of missing flags and non-verbose build commands. Used for
212 preprocess_missing => 0,
214 compile_missing => 0,
216 compile_cpp_missing => 0,
220 commands_nonverbose => 0,
223 # Use colored (ANSI) output?
230 my ($message, $missing_flags_ref, $flag_renames_ref, $line) = @_;
232 # Get string value of qr//-escaped regexps and if requested rename them.
233 my @missing_flags = map {
234 $flag_renames_ref->{$_}
235 } @{$missing_flags_ref};
237 my $flags = join ' ', @missing_flags;
238 printf "%s (%s)%s %s",
239 error_color($message, 'red'), $flags, error_color(':', 'yellow'),
242 sub error_non_verbose_build {
246 error_color('NONVERBOSE BUILD', 'red'),
247 error_color(':', 'yellow'),
250 sub error_invalid_cmake {
254 error_color('INVALID CMAKE', 'red'),
255 error_color(':', 'yellow'),
258 sub error_hardening_wrapper {
260 error_color('HARDENING WRAPPER', 'red'),
261 error_color(':', 'yellow'),
262 'no checks possible, aborting';
265 my ($message, $color) = @_;
268 return Term::ANSIColor::colored($message, $color);
275 my ($line, @flags) = @_;
277 foreach my $flag (@flags) {
278 return 1 if $line =~ /$flag/;
284 my ($line, $missing_flags_ref, @flags) = @_;
286 my @missing_flags = ();
287 foreach my $flag (@flags) {
288 if (not $line =~ /$flag/) {
289 push @missing_flags, $flag;
293 return 1 if scalar @missing_flags == 0;
295 @{$missing_flags_ref} = @missing_flags;
299 # Modifies $missing_flags_ref array.
300 sub pic_pie_conflict {
301 my ($line, $pie, $missing_flags_ref, @flags_pie) = @_;
303 return 0 if not $pie;
304 return 0 if not any_flags_used($line, @def_ldflags_pic);
306 my %flags = map { $_ => 1 } @flags_pie;
308 # Remove all PIE flags from @missing_flags as they are not required with
311 not exists $flags{$_}
312 } @{$missing_flags_ref};
313 @{$missing_flags_ref} = @result;
315 # We got a conflict when no flags are left, thus only PIE flags were
316 # missing. If other flags were missing abort because the conflict is not
318 return scalar @result == 0;
321 sub is_non_verbose_build {
322 my ($line, $next_line, $skip_ref) = @_;
324 if (not ($line =~ /^checking if you want to see long compiling messages\.\.\. no/
325 or $line =~ /^\s*\[?(?:CC|CCLD|C\+\+|CXX|CXXLD|LD|LINK)\]?\s+(.+?)$/
326 or $line =~ /^\s*(?:C|c)ompiling\s+(.+?)(?:\.\.\.)?$/
327 or $line =~ /^\s*(?:B|b)uilding (?:program|shared library)\s+(.+?)$/
328 or $line =~ /^\s*\[[\d ]+%\] Building (?:C|CXX) object (.+?)$/)) {
334 # C++ compiler setting.
335 return 0 if $line =~ /^\s*C\+\+.+?:\s+(?:yes|no)\s*$/;
336 # "Compiling" with no file name.
337 if ($line =~ /^\s*(?:C|c)ompiling\s+(.+?)(?:\.\.\.)?$/) {
338 # $file_extension_regex may need spaces around the filename.
339 return 0 if not " $1 " =~ /$file_extension_regex/o;
344 # On the first pass we only check if this line is verbose or not.
345 return 1 if not defined $next_line;
347 # Second pass, we have access to the next line.
350 # CMake and other build systems print the non-verbose messages also when
351 # building verbose. If a compiler and the file name occurs in the next
352 # line, treat it as verbose build.
354 # Get filename, we can't use the complete path as only parts of it are
355 # used in the real compiler command.
356 $file =~ m{/([^/\s]+)$};
359 if ($next_line =~ /\Q$file\E/ and $next_line =~ /$cc_regex/o) {
360 # We still have to skip the current line as it doesn't contain any
370 sub compile_flag_regexp {
371 my ($flag_renames_ref, @flags) = @_;
374 foreach my $flag (@flags) {
375 # Store flag name in replacement string for correct flags in messages
376 # with qr//ed flag regexps.
377 $flag_renames_ref->{qr/\s$flag(?:\s|\\)/}
378 = (exists $flag_renames_ref->{$flag})
379 ? $flag_renames_ref->{$flag}
382 # Compile flag regexp for faster execution.
383 push @result, qr/\s$flag(?:\s|\\)/;
388 sub extension_found {
389 my ($extensions_ref, @extensions) = @_;
392 foreach my $extension (@extensions) {
393 if (exists $extensions_ref->{$extension}) {
404 # Parse command line arguments.
406 my $option_version = 0;
408 my $option_bindnow = 0;
410 my $option_arch = undef;
411 my $option_buildd = 0;
413 if (not Getopt::Long::GetOptions(
414 'help|h|?' => \$option_help,
415 'version' => \$option_version,
417 'pie' => \$option_pie,
418 'bindnow' => \$option_bindnow,
419 'all' => \$option_all,
421 'color' => \$option_color,
422 'arch=s' => \$option_arch,
423 'buildd' => \$option_buildd,
426 Pod::Usage::pod2usage(2);
430 Pod::Usage::pod2usage(1);
432 if ($option_version) {
433 print "blhc $VERSION Copyright (C) 2012 Simon Ruderich
435 This program is free software: you can redistribute it and/or modify
436 it under the terms of the GNU General Public License as published by
437 the Free Software Foundation, either version 3 of the License, or
438 (at your option) any later version.
440 This program is distributed in the hope that it will be useful,
441 but WITHOUT ANY WARRANTY; without even the implied warranty of
442 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
443 GNU General Public License for more details.
445 You should have received a copy of the GNU General Public License
446 along with this program. If not, see <http://www.gnu.org/licenses/>.
451 # Don't load Term::ANSIColor in buildd mode because Term::ANSIColor is not
452 # installed on Debian's buildds.
453 if (not $option_buildd) {
454 require Term::ANSIColor;
462 # Precompile all flag regexps. any_flags_used(), all_flags_used() get a lot
464 @def_cflags = compile_flag_regexp(\%flag_renames, @def_cflags);
465 @def_cflags_format = compile_flag_regexp(\%flag_renames, @def_cflags_format);
466 @def_cflags_fortify = compile_flag_regexp(\%flag_renames, @def_cflags_fortify);
467 @def_cflags_stack = compile_flag_regexp(\%flag_renames, @def_cflags_stack);
468 @def_cflags_pie = compile_flag_regexp(\%flag_renames, @def_cflags_pie);
469 @def_cxxflags = compile_flag_regexp(\%flag_renames, @def_cxxflags);
470 @def_cppflags = compile_flag_regexp(\%flag_renames, @def_cppflags);
471 @def_cppflags_fortify = compile_flag_regexp(\%flag_renames, @def_cppflags_fortify);
472 @def_ldflags = compile_flag_regexp(\%flag_renames, @def_ldflags);
473 @def_ldflags_relro = compile_flag_regexp(\%flag_renames, @def_ldflags_relro);
474 @def_ldflags_bindnow = compile_flag_regexp(\%flag_renames, @def_ldflags_bindnow);
475 @def_ldflags_pie = compile_flag_regexp(\%flag_renames, @def_ldflags_pie);
476 @def_ldflags_pic = compile_flag_regexp(\%flag_renames, @def_ldflags_pic);
481 FILE: foreach my $file (@ARGV) {
482 print "checking '$file'...\n" if scalar @ARGV > 1;
484 open my $fh, '<', $file or die "$!: $file";
486 # Architecture of this file.
487 my $arch = $option_arch;
489 # Hardening options. Not all architectures support all hardening options.
490 my $harden_format = 1;
491 my $harden_fortify = 1;
492 my $harden_stack = 1;
493 my $harden_relro = 1;
494 my $harden_bindnow = $option_bindnow; # defaults to 0
495 my $harden_pie = $option_pie; # defaults to 0
497 while (my $line = <$fh>) {
498 # dpkg-buildflags only provides hardening flags since 1.16.1, don't
499 # check for hardening flags in buildd mode if an older dpkg-dev is
500 # used. Default flags (-g -O2) are still checked.
502 # Packages which were built before 1.16.1 but used their own hardening
503 # flags are not checked.
504 if ($option_buildd and $line =~ /^Toolchain package versions: /) {
505 require Dpkg::Version;
506 if ($line !~ /\bdpkg-dev_(\S+)/
507 or Dpkg::Version::version_compare($1, '1.16.1') < 0) {
517 # The following two versions of CMake in Debian obeyed CPPFLAGS, but
518 # this was later dropped because upstream rejected the patch. Thus
519 # build logs with these versions will have fortify hardening flags
520 # enabled, even though they may be not correctly set and are missing
521 # when build with later CMake versions. Thanks to Aron Xu for letting
523 if ($line =~ /^Package versions: /
524 and $line =~ /\bcmake_(\S+)/
525 and ($1 eq '2.8.7-1' or $1 eq '2.8.7-2')) {
526 if (not $option_buildd) {
527 error_invalid_cmake($1);
529 print "W-invalid-cmake-used $1\n";
531 $exit |= $exit_code{invalid_cmake};
534 # If hardening wrapper is used (wraps calls to gcc and adds hardening
535 # flags automatically) we can't perform any checks, abort.
536 if ($line =~ /^Build-Depends: .*\bhardening-wrapper\b/) {
537 if (not $option_buildd) {
538 error_hardening_wrapper();
540 print "I-hardening-wrapper-used\n";
542 $exit |= $exit_code{hardening_wrapper};
546 # We skip over unimportant lines at the beginning of the log to
547 # prevent false positives.
548 last if $line =~ /^dpkg-buildpackage:/;
551 # Input lines, contain only the lines with compiler commands.
554 my $continuation = 0;
555 my $complete_line = undef;
556 while (my $line = <$fh>) {
557 # And stop at the end of the build log. Package details (reported by
558 # the buildd logs) are not important for us. This also prevents false
560 last if $line =~ /^Build finished at \d{8}-\d{4}$/;
562 # Detect architecture automatically unless overridden.
564 and $line =~ /^dpkg-buildpackage: host architecture (.+)$/) {
568 # Ignore compiler warnings for now.
569 next if $line =~ /$warning_regex/o;
571 if (not $option_buildd and $line =~ /\033/) { # esc
572 # Remove all ANSI color sequences which are sometimes used in
573 # non-verbose builds.
574 $line = Term::ANSIColor::colorstrip($line);
575 # Also strip '\0xf' (delete previous character), used by Elinks'
578 # And "ESC(B" which seems to be used on armhf and hurd (not sure
580 $line =~ s/\033\(B//g;
583 # Check if this line indicates a non verbose build.
584 my $non_verbose = is_non_verbose_build($line);
586 # One line may contain multiple commands (";"). Treat each one as
587 # single line. parse_line() is slow, only use it when necessary.
588 my @line = (not $line =~ /;/)
591 # Ensure newline at the line end - necessary for
592 # correct parsing later.
595 } Text::ParseWords::parse_line(';', 1, $line);
596 foreach $line (@line) {
600 # Join lines, but leave the "\" in place so it's clear where
601 # the original line break was.
602 chomp $complete_line;
603 $complete_line .= ' ' . $line;
605 # Line continuation, line ends with "\".
606 if ($line =~ /\\\s*$/) {
608 # Start line continuation.
609 if (not defined $complete_line) {
610 $complete_line = $line;
615 if (not $continuation) {
616 # Use the complete line if a line continuation occurred.
617 if (defined $complete_line) {
618 $line = $complete_line;
619 $complete_line = undef;
622 # Ignore lines with no compiler commands.
623 next if not $non_verbose
624 and not $line =~ /\b$cc_regex(?:\s|\\)/o;
625 # Ignore lines with no filenames with extensions. May miss
626 # some non-verbose builds (e.g. "gcc -o test" [sic!]), but
627 # shouldn't be a problem as the log will most likely contain
628 # other non-verbose commands which are detected.
629 next if not $non_verbose
630 and not $line =~ /$file_extension_regex/o;
632 # Ignore false positives.
634 # `./configure` output.
635 next if not $non_verbose
636 and $line =~ /^(?:checking|(?:C|c)onfigure:) /;
637 next if $line =~ /^\s*(?:Host\s+)?(?:C(?:\+\+)?\s+)?
638 (?:C|c)ompiler[\s.]*:?\s+
640 next if $line =~ /^\s*(?:- )?(?:HOST_)?(?:CC|CXX)\s*=\s*$cc_regex_full\s*$/o;
642 # Check if additional hardening options were used. Used to
643 # ensure they are used for the complete build.
644 $harden_pie = 1 if any_flags_used($line, @def_cflags_pie, @def_ldflags_pie);
645 $harden_bindnow = 1 if any_flags_used($line, @def_ldflags_bindnow);
654 if (scalar @input == 0) {
655 if (not $option_buildd) {
656 print "No compiler commands!\n";
658 print "W-no-compiler-commands\n";
660 $exit |= $exit_code{no_compiler_commands};
664 if ($option_buildd) {
665 $statistics{commands} += scalar @input;
668 # Option or auto detected.
670 # The following was partially copied from dpkg-dev 1.16.1.2
671 # (/usr/share/perl5/Dpkg/Vendor/Debian.pm, add_hardening_flags()),
672 # copyright Raphaël Hertzog <hertzog@debian.org>, Kees Cook
673 # <kees@debian.org>, Canonical, Ltd. licensed under GPL version 2 or
674 # later. Keep it in sync.
677 my ($abi, $os, $cpu) = Dpkg::Arch::debarch_to_debtriplet($arch);
679 # Disable unsupported hardening options.
680 if ($cpu =~ /^(ia64|alpha|mips|mipsel|hppa)$/ or $arch eq 'arm') {
683 if ($cpu =~ /^(ia64|hppa|avr32)$/) {
690 my @cflags = @def_cflags;
691 my @cxxflags = @def_cxxflags;
692 my @cppflags = @def_cppflags;
693 my @ldflags = @def_ldflags;
694 # Check the specified hardening options, same order as dpkg-buildflags.
696 @cflags = (@cflags, @def_cflags_pie);
697 @cxxflags = (@cxxflags, @def_cflags_pie);
698 @ldflags = (@ldflags, @def_ldflags_pie);
701 @cflags = (@cflags, @def_cflags_stack);
702 @cxxflags = (@cxxflags, @def_cflags_stack);
704 if ($harden_fortify) {
705 @cflags = (@cflags, @def_cflags_fortify);
706 @cxxflags = (@cxxflags, @def_cflags_fortify);
707 @cppflags = (@cppflags, @def_cppflags_fortify);
709 if ($harden_format) {
710 @cflags = (@cflags, @def_cflags_format);
711 @cxxflags = (@cxxflags, @def_cflags_format);
714 @ldflags = (@ldflags, @def_ldflags_relro);
716 if ($harden_bindnow) {
717 @ldflags = (@ldflags, @def_ldflags_bindnow);
720 for (my $i = 0; $i < scalar @input; $i++) {
721 my $line = $input[$i];
724 if (is_non_verbose_build($line, $input[$i + 1], \$skip)) {
725 if (not $option_buildd) {
726 error_non_verbose_build($line);
728 $statistics{commands_nonverbose}++;
730 $exit |= $exit_code{non_verbose_build};
733 # Even if it's a verbose build, we might have to skip this line.
736 # Remove everything until and including the compiler command. Makes
737 # checks easier and faster.
738 $line =~ s/^.*?$cc_regex//o;
739 # "([...] test.c)" is not detected as 'test.c' - fix this by removing
740 # the brace and similar characters.
741 $line =~ s/['")]+$//;
743 # Skip unnecessary tests when only preprocessing.
744 my $flag_preprocess = 0;
751 # Preprocess, compile, assemble.
752 if ($line =~ /\s(-E|-S|-c)\b/) {
754 $flag_preprocess = 1 if $1 eq '-E';
755 $compile = 1 if $1 eq '-S' or $1 eq '-c';
756 # Dependency generation for Makefiles. The other flags (-MF -MG -MP
757 # -MT -MQ) are always used with -M/-MM.
758 } elsif ($line =~ /\s(?:-M|-MM)\b/) {
760 # Otherwise assume we are linking.
765 # -MD/-MMD also cause dependency generation, but they don't imply -E!
766 if ($line =~ /\s(?:-MD|-MMD)\b/) {
768 $flag_preprocess = 0;
771 # Dependency generation for Makefiles, no preprocessing or other flags
775 # Get all file extensions on this line.
776 my @extensions = $line =~ /$file_extension_regex/go;
777 # Ignore all unknown extensions to speedup the search below.
778 @extensions = grep { exists $extension{$_} } @extensions;
780 # These file types don't require preprocessing.
781 if (extension_found(\%extensions_no_preprocess, @extensions)) {
784 # These file types require preprocessing.
785 if (extension_found(\%extensions_preprocess, @extensions)) {
789 # If there are source files then it's compiling/linking in one step
790 # and we must check both. We only check for source files here, because
791 # header files cause too many false positives.
792 if (not $flag_preprocess
793 and extension_found(\%extensions_compile_link, @extensions)) {
794 # Assembly files don't need CFLAGS.
795 if (not extension_found(\%extensions_compile, @extensions)
796 and extension_found(\%extensions_no_compile, @extensions)) {
804 # Assume CXXFLAGS are required when a C++ file is specified in the
808 and extension_found(\%extensions_compile_cpp, @extensions)) {
813 if ($option_buildd) {
814 $statistics{preprocess}++ if $preprocess;
815 $statistics{compile}++ if $compile;
816 $statistics{compile_cpp}++ if $compile_cpp;
817 $statistics{link}++ if $link;
820 # Check hardening flags.
822 if ($compile and not all_flags_used($line, \@missing, @cflags)
823 # Libraries linked with -fPIC don't have to (and can't) be
824 # linked with -fPIE as well. It's no error if only PIE flags
826 and not pic_pie_conflict($line, $harden_pie, \@missing, @def_cflags_pie)
827 # Assume dpkg-buildflags returns the correct flags.
828 and not $line =~ /`dpkg-buildflags --get CFLAGS`/) {
829 if (not $option_buildd) {
830 error_flags('CFLAGS missing', \@missing, \%flag_renames, $input[$i]);
832 $statistics{compile_missing}++;
834 $exit |= $exit_code{flags_missing};
835 } elsif ($compile_cpp and not all_flags_used($line, \@missing, @cflags)
836 # Libraries linked with -fPIC don't have to (and can't) be
837 # linked with -fPIE as well. It's no error if only PIE flags
839 and not pic_pie_conflict($line, $harden_pie, \@missing, @def_cflags_pie)
840 # Assume dpkg-buildflags returns the correct flags.
841 and not $line =~ /`dpkg-buildflags --get CXXFLAGS`/) {
842 if (not $option_buildd) {
843 error_flags('CXXFLAGS missing', \@missing, \%flag_renames, $input[$i]);
845 $statistics{compile_cpp_missing}++;
847 $exit |= $exit_code{flags_missing};
849 if ($preprocess and not all_flags_used($line, \@missing, @cppflags)
850 # Assume dpkg-buildflags returns the correct flags.
851 and not $line =~ /`dpkg-buildflags --get CPPFLAGS`/) {
852 if (not $option_buildd) {
853 error_flags('CPPFLAGS missing', \@missing, \%flag_renames, $input[$i]);
855 $statistics{preprocess_missing}++;
857 $exit |= $exit_code{flags_missing};
859 if ($link and not all_flags_used($line, \@missing, @ldflags)
860 # Same here, -fPIC conflicts with -fPIE.
861 and not pic_pie_conflict($line, $harden_pie, \@missing, @def_ldflags_pie)
862 # Assume dpkg-buildflags returns the correct flags.
863 and not $line =~ /`dpkg-buildflags --get LDFLAGS`/) {
864 if (not $option_buildd) {
865 error_flags('LDFLAGS missing', \@missing, \%flag_renames, $input[$i]);
867 $statistics{link_missing}++;
869 $exit |= $exit_code{flags_missing};
874 # Print statistics for buildd mode, only output in this mode.
875 if ($option_buildd) {
878 if ($statistics{preprocess_missing}) {
879 push @warning, sprintf "CPPFLAGS %d (of %d)",
880 $statistics{preprocess_missing},
881 $statistics{preprocess};
883 if ($statistics{compile_missing}) {
884 push @warning, sprintf "CFLAGS %d (of %d)",
885 $statistics{compile_missing},
886 $statistics{compile};
888 if ($statistics{compile_cpp_missing}) {
889 push @warning, sprintf "CXXFLAGS %d (of %d)",
890 $statistics{compile_cpp_missing},
891 $statistics{compile_cpp};
893 if ($statistics{link_missing}) {
894 push @warning, sprintf "LDFLAGS %d (of %d)",
895 $statistics{link_missing},
898 if (scalar @warning) {
899 local $" = ', '; # array join string
900 print "W-dpkg-buildflags-missing @warning missing\n";
903 if ($statistics{commands_nonverbose}) {
904 printf "W-compiler-flags-hidden %d (of %d) hidden\n",
905 $statistics{commands_nonverbose},
906 $statistics{commands},
918 blhc - build log hardening check, checks build logs for missing hardening flags
922 B<blhc> [I<options>] I<E<lt>dpkg-buildpackage build log fileE<gt>..>
926 blhc is a small tool which checks build logs for missing hardening flags and
927 other important warnings. It's licensed under the GPL 3 or later.
935 Force check for all +all (+pie, +bindnow) hardening flags. By default it's
938 =item B<--arch> I<architecture>
940 Set the specific architecture (e.g. amd64, armel, etc.), automatically
941 disables hardening flags not available on this architecture. Is detected
942 automatically if dpkg-buildpackage is used.
946 Force check for all +bindnow hardening flags. By default it's auto detected.
950 Special mode for buildds when automatically parsing log files. The following
951 changes are in effect:
957 Don't check hardening flags in old log files (if dpkg-dev << 1.16.1 is
964 Use colored (ANSI) output for warning messages.
968 Force check for all +pie hardening flags. By default it's auto detected.
970 =item B<-h -? --help>
972 Print available options.
976 Print version number and license.
980 Auto detection for B<--pie> and B<--bindnow> only works if at least one
981 command uses the required hardening flag (e.g. -fPIE). Then it's required for
982 all other commands as well.
986 The exit status is a "bit mask", each listed status is ORed when the error
987 condition occurs to get the result.
997 No compiler commands were found.
1001 Invalid arguments/options given to blhc.
1009 Missing hardening flags.
1013 Hardening wrapper detected, no tests performed.
1019 Simon Ruderich, E<lt>simon@ruderich.orgE<gt>
1021 =head1 COPYRIGHT AND LICENSE
1023 Copyright (C) 2012 by Simon Ruderich
1025 This program is free software: you can redistribute it and/or modify
1026 it under the terms of the GNU General Public License as published by
1027 the Free Software Foundation, either version 3 of the License, or
1028 (at your option) any later version.
1030 This program is distributed in the hope that it will be useful,
1031 but WITHOUT ANY WARRANTY; without even the implied warranty of
1032 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1033 GNU General Public License for more details.
1035 You should have received a copy of the GNU General Public License
1036 along with this program. If not, see <http://www.gnu.org/licenses/>.