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 $file_extension_regex = qr/
138 \S+ # Filename without extension.
140 ([^\/\\.,;:\s]+)# File extension.
141 (?=\s|\\) # At end of word. Can't use \b because some files have non
142 # word characters at the end and because \b matches double
143 # extensions (like .cpp.o). Works always as all lines are
144 # terminated with "\n".
147 # Expected (hardening) flags. All flags are used as regexps.
152 my @def_cflags_format = (
155 '-Werror=format-security',
157 my @def_cflags_fortify = (
158 # fortify needs at least -O1, but -O2 is recommended anyway
160 my @def_cflags_stack = (
162 '--param=ssp-buffer-size=4',
164 my @def_cflags_pie = (
170 # @def_cxxflags_* is the same as @def_cflags_*.
171 my @def_cppflags = ();
172 my @def_cppflags_fortify = (
173 '-D_FORTIFY_SOURCE=2',
175 my @def_ldflags = ();
176 my @def_ldflags_relro = (
179 my @def_ldflags_bindnow = (
182 my @def_ldflags_pie = (
186 my @def_ldflags_pic = (
191 # References to all flags checked by the parser.
195 \@def_cflags_fortify,
200 \@def_cppflags_fortify,
203 \@def_ldflags_bindnow,
205 # References to all used flags.
206 my @flag_refs_all = (
211 # Renaming rules for the output so the regex parts are not visible. Also
212 # stores string values of flag regexps above, see compile_flag_regexp().
214 '-O(?:2|3)' => '-O2',
215 '-Wl,(?:-z,)?relro' => '-Wl,-z,relro',
216 '-Wl,(?:-z,)?now' => '-Wl,-z,now',
220 no_compiler_commands => 1 << 0,
221 # used by POD::Usage => 1 << 1,
222 non_verbose_build => 1 << 2,
223 flags_missing => 1 << 3,
224 hardening_wrapper => 1 << 4,
225 invalid_cmake => 1 << 5,
228 # Statistics of missing flags and non-verbose build commands. Used for
232 preprocess_missing => 0,
234 compile_missing => 0,
236 compile_cpp_missing => 0,
240 commands_nonverbose => 0,
243 # Use colored (ANSI) output?
250 my ($message, $missing_flags_ref, $flag_renames_ref, $line) = @_;
252 # Get string value of qr//-escaped regexps and if requested rename them.
253 my @missing_flags = map {
254 $flag_renames_ref->{$_}
255 } @{$missing_flags_ref};
257 my $flags = join ' ', @missing_flags;
258 printf "%s (%s)%s %s",
259 error_color($message, 'red'), $flags, error_color(':', 'yellow'),
262 sub error_non_verbose_build {
266 error_color('NONVERBOSE BUILD', 'red'),
267 error_color(':', 'yellow'),
270 sub error_invalid_cmake {
274 error_color('INVALID CMAKE', 'red'),
275 error_color(':', 'yellow'),
278 sub error_hardening_wrapper {
280 error_color('HARDENING WRAPPER', 'red'),
281 error_color(':', 'yellow'),
282 'no checks possible, aborting';
285 my ($message, $color) = @_;
288 return Term::ANSIColor::colored($message, $color);
295 my ($line, @flags) = @_;
297 foreach my $flag (@flags) {
298 return 1 if $line =~ /$flag/;
304 my ($line, $missing_flags_ref, @flags) = @_;
306 my @missing_flags = ();
307 foreach my $flag (@flags) {
308 if (not $line =~ /$flag/) {
309 push @missing_flags, $flag;
313 return 1 if scalar @missing_flags == 0;
315 @{$missing_flags_ref} = @missing_flags;
319 # Modifies $missing_flags_ref array.
320 sub pic_pie_conflict {
321 my ($line, $pie, $missing_flags_ref, @flags_pie) = @_;
323 return 0 if not $pie;
324 return 0 if not any_flags_used($line, @def_ldflags_pic);
326 my %flags = map { $_ => 1 } @flags_pie;
328 # Remove all PIE flags from @missing_flags as they are not required with
331 not exists $flags{$_}
332 } @{$missing_flags_ref};
333 @{$missing_flags_ref} = @result;
335 # We got a conflict when no flags are left, thus only PIE flags were
336 # missing. If other flags were missing abort because the conflict is not
338 return scalar @result == 0;
341 sub is_non_verbose_build {
342 my ($line, $next_line, $skip_ref) = @_;
344 if (not ($line =~ /^checking if you want to see long compiling messages\.\.\. no/
345 or $line =~ /^\s*\[?(?:CC|CCLD|C\+\+|CXX|CXXLD|LD|LINK)\]?\s+(.+?)$/
346 or $line =~ /^\s*(?:C|c)ompiling\s+(.+?)(?:\.\.\.)?$/
347 or $line =~ /^\s*(?:B|b)uilding (?:program|shared library)\s+(.+?)$/
348 or $line =~ /^\s*\[[\d ]+%\] Building (?:C|CXX) object (.+?)$/)) {
354 # C++ compiler setting.
355 return 0 if $line =~ /^\s*C\+\+.+?:\s+(?:yes|no)\s*$/;
356 # "Compiling" with no file name.
357 if ($line =~ /^\s*(?:C|c)ompiling\s+(.+?)(?:\.\.\.)?$/) {
358 # $file_extension_regex may need spaces around the filename.
359 return 0 if not " $1 " =~ /$file_extension_regex/o;
364 # On the first pass we only check if this line is verbose or not.
365 return 1 if not defined $next_line;
367 # Second pass, we have access to the next line.
370 # CMake and other build systems print the non-verbose messages also when
371 # building verbose. If a compiler and the file name occurs in the next
372 # line, treat it as verbose build.
374 # Get filename, we can't use the complete path as only parts of it are
375 # used in the real compiler command.
376 $file =~ m{/([^/\s]+)$};
379 if ($next_line =~ /\Q$file\E/ and $next_line =~ /$cc_regex/o) {
380 # We still have to skip the current line as it doesn't contain any
390 sub compile_flag_regexp {
391 my ($flag_renames_ref, @flags) = @_;
394 foreach my $flag (@flags) {
395 # Store flag name in replacement string for correct flags in messages
396 # with qr//ed flag regexps.
397 $flag_renames_ref->{qr/\s$flag(?:\s|\\)/}
398 = (exists $flag_renames_ref->{$flag})
399 ? $flag_renames_ref->{$flag}
402 # Compile flag regexp for faster execution.
403 push @result, qr/\s$flag(?:\s|\\)/;
408 sub extension_found {
409 my ($extensions_ref, @extensions) = @_;
412 foreach my $extension (@extensions) {
413 if (exists $extensions_ref->{$extension}) {
424 # Parse command line arguments.
426 my $option_version = 0;
428 my $option_bindnow = 0;
429 my @option_ignore_flag = ();
430 my @option_ignore_line = ();
432 my $option_arch = undef;
433 my $option_buildd = 0;
435 if (not Getopt::Long::GetOptions(
436 'help|h|?' => \$option_help,
437 'version' => \$option_version,
439 'pie' => \$option_pie,
440 'bindnow' => \$option_bindnow,
441 'all' => \$option_all,
443 'ignore-flag=s' => \@option_ignore_flag,
444 'ignore-line=s' => \@option_ignore_line,
446 'color' => \$option_color,
447 'arch=s' => \$option_arch,
448 'buildd' => \$option_buildd,
450 or scalar @ARGV == 0) {
452 Pod::Usage::pod2usage(2);
456 Pod::Usage::pod2usage(1);
458 if ($option_version) {
459 print "blhc $VERSION Copyright (C) 2012 Simon Ruderich
461 This program is free software: you can redistribute it and/or modify
462 it under the terms of the GNU General Public License as published by
463 the Free Software Foundation, either version 3 of the License, or
464 (at your option) any later version.
466 This program is distributed in the hope that it will be useful,
467 but WITHOUT ANY WARRANTY; without even the implied warranty of
468 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
469 GNU General Public License for more details.
471 You should have received a copy of the GNU General Public License
472 along with this program. If not, see <http://www.gnu.org/licenses/>.
477 # Don't load Term::ANSIColor in buildd mode because Term::ANSIColor is not
478 # installed on Debian's buildds.
479 if (not $option_buildd) {
480 require Term::ANSIColor;
488 # Strip flags which should be ignored.
489 if (scalar @option_ignore_flag > 0) {
490 my %ignores = map { $_ => 1 } @option_ignore_flag;
491 foreach my $flags (@flag_refs) {
493 # Flag found as string.
494 not exists $ignores{$_}
495 # Flag found as string representation of regexp.
496 and (not defined $flag_renames{$_}
497 or not exists $ignores{$flag_renames{$_}})
502 # Precompile all flag regexps. any_flags_used(), all_flags_used() get a lot
504 foreach my $flags (@flag_refs_all) {
505 @{$flags} = compile_flag_regexp(\%flag_renames, @{$flags});
508 # Precompile ignore line regexps, also anchor at beginning and end of line.
509 foreach my $ignore (@option_ignore_line) {
510 $ignore = qr/^$ignore$/;
517 foreach my $file (@ARGV) {
518 print "checking '$file'...\n" if scalar @ARGV > 1;
520 open my $fh, '<', $file or die "$!: $file";
522 # Architecture of this file.
523 my $arch = $option_arch;
525 # Hardening options. Not all architectures support all hardening options.
526 my $harden_format = 1;
527 my $harden_fortify = 1;
528 my $harden_stack = 1;
529 my $harden_relro = 1;
530 my $harden_bindnow = $option_bindnow; # defaults to 0
531 my $harden_pie = $option_pie; # defaults to 0
533 while (my $line = <$fh>) {
534 # dpkg-buildflags only provides hardening flags since 1.16.1, don't
535 # check for hardening flags in buildd mode if an older dpkg-dev is
536 # used. Default flags (-g -O2) are still checked.
538 # Packages which were built before 1.16.1 but used their own hardening
539 # flags are not checked.
540 if ($option_buildd and $line =~ /^Toolchain package versions: /) {
541 require Dpkg::Version;
542 if ($line !~ /\bdpkg-dev_(\S+)/
543 or Dpkg::Version::version_compare($1, '1.16.1') < 0) {
553 # The following two versions of CMake in Debian obeyed CPPFLAGS, but
554 # this was later dropped because upstream rejected the patch. Thus
555 # build logs with these versions will have fortify hardening flags
556 # enabled, even though they may be not correctly set and are missing
557 # when build with later CMake versions. Thanks to Aron Xu for letting
559 if ($line =~ /^Package versions: /
560 and $line =~ /\bcmake_(\S+)/
561 and ($1 eq '2.8.7-1' or $1 eq '2.8.7-2')) {
562 if (not $option_buildd) {
563 error_invalid_cmake($1);
565 print "W-invalid-cmake-used $1\n";
567 $exit |= $exit_code{invalid_cmake};
570 # If hardening wrapper is used (wraps calls to gcc and adds hardening
571 # flags automatically) we can't perform any checks, abort.
572 if ($line =~ /^Build-Depends: .*\bhardening-wrapper\b/) {
573 if (not $option_buildd) {
574 error_hardening_wrapper();
576 print "I-hardening-wrapper-used\n";
578 $exit |= $exit_code{hardening_wrapper};
582 # We skip over unimportant lines at the beginning of the log to
583 # prevent false positives.
584 last if $line =~ /^dpkg-buildpackage:/;
587 # Input lines, contain only the lines with compiler commands.
590 my $continuation = 0;
591 my $complete_line = undef;
592 while (my $line = <$fh>) {
593 # And stop at the end of the build log. Package details (reported by
594 # the buildd logs) are not important for us. This also prevents false
596 last if $line =~ /^Build finished at \d{8}-\d{4}$/;
598 # Detect architecture automatically unless overridden.
600 and $line =~ /^dpkg-buildpackage: host architecture (.+)$/) {
604 # Ignore compiler warnings for now.
605 next if $line =~ /$warning_regex/o;
607 if (not $option_buildd and $line =~ /\033/) { # esc
608 # Remove all ANSI color sequences which are sometimes used in
609 # non-verbose builds.
610 $line = Term::ANSIColor::colorstrip($line);
611 # Also strip '\0xf' (delete previous character), used by Elinks'
614 # And "ESC(B" which seems to be used on armhf and hurd (not sure
616 $line =~ s/\033\(B//g;
619 # Check if this line indicates a non verbose build.
620 my $non_verbose = is_non_verbose_build($line);
622 # One line may contain multiple commands (";"). Treat each one as
623 # single line. parse_line() is slow, only use it when necessary.
624 my @line = (not $line =~ /;/)
627 # Ensure newline at the line end - necessary for
628 # correct parsing later.
631 } Text::ParseWords::parse_line(';', 1, $line);
632 foreach $line (@line) {
636 # Join lines, but leave the "\" in place so it's clear where
637 # the original line break was.
638 chomp $complete_line;
639 $complete_line .= ' ' . $line;
641 # Line continuation, line ends with "\".
642 if ($line =~ /\\\s*$/) {
644 # Start line continuation.
645 if (not defined $complete_line) {
646 $complete_line = $line;
651 # Use the complete line if a line continuation occurred.
652 if (defined $complete_line) {
653 $line = $complete_line;
654 $complete_line = undef;
657 # Ignore lines with no compiler commands.
658 next if not $non_verbose
659 and not $line =~ /\b$cc_regex(?:\s|\\)/o;
660 # Ignore lines with no filenames with extensions. May miss some
661 # non-verbose builds (e.g. "gcc -o test" [sic!]), but shouldn't be
662 # a problem as the log will most likely contain other non-verbose
663 # commands which are detected.
664 next if not $non_verbose
665 and not $line =~ /$file_extension_regex/o;
667 # Ignore false positives.
669 # `./configure` output.
670 next if not $non_verbose
671 and $line =~ /^(?:checking|(?:C|c)onfigure:) /;
672 next if $line =~ /^\s*(?:Host\s+)?(?:C(?:\+\+)?\s+)?
673 (?:C|c)ompiler[\s.]*:?\s+
675 next if $line =~ /^\s*(?:- )?(?:HOST_)?(?:CC|CXX)\s*=\s*$cc_regex_full\s*$/o;
677 # Check if additional hardening options were used. Used to ensure
678 # they are used for the complete build.
679 $harden_pie = 1 if any_flags_used($line, @def_cflags_pie, @def_ldflags_pie);
680 $harden_bindnow = 1 if any_flags_used($line, @def_ldflags_bindnow);
688 if (scalar @input == 0) {
689 if (not $option_buildd) {
690 print "No compiler commands!\n";
692 print "W-no-compiler-commands\n";
694 $exit |= $exit_code{no_compiler_commands};
698 if ($option_buildd) {
699 $statistics{commands} += scalar @input;
702 # Option or auto detected.
704 # The following was partially copied from dpkg-dev 1.16.1.2
705 # (/usr/share/perl5/Dpkg/Vendor/Debian.pm, add_hardening_flags()),
706 # copyright Raphaël Hertzog <hertzog@debian.org>, Kees Cook
707 # <kees@debian.org>, Canonical, Ltd. licensed under GPL version 2 or
708 # later. Keep it in sync.
711 my ($abi, $os, $cpu) = Dpkg::Arch::debarch_to_debtriplet($arch);
713 # Disable unsupported hardening options.
714 if ($cpu =~ /^(ia64|alpha|mips|mipsel|hppa)$/ or $arch eq 'arm') {
717 if ($cpu =~ /^(ia64|hppa|avr32)$/) {
724 my @cflags = @def_cflags;
725 my @cxxflags = @def_cxxflags;
726 my @cppflags = @def_cppflags;
727 my @ldflags = @def_ldflags;
728 # Check the specified hardening options, same order as dpkg-buildflags.
730 @cflags = (@cflags, @def_cflags_pie);
731 @cxxflags = (@cxxflags, @def_cflags_pie);
732 @ldflags = (@ldflags, @def_ldflags_pie);
735 @cflags = (@cflags, @def_cflags_stack);
736 @cxxflags = (@cxxflags, @def_cflags_stack);
738 if ($harden_fortify) {
739 @cflags = (@cflags, @def_cflags_fortify);
740 @cxxflags = (@cxxflags, @def_cflags_fortify);
741 @cppflags = (@cppflags, @def_cppflags_fortify);
743 if ($harden_format) {
744 @cflags = (@cflags, @def_cflags_format);
745 @cxxflags = (@cxxflags, @def_cflags_format);
748 @ldflags = (@ldflags, @def_ldflags_relro);
750 if ($harden_bindnow) {
751 @ldflags = (@ldflags, @def_ldflags_bindnow);
755 for (my $i = 0; $i < scalar @input; $i++) {
756 my $line = $input[$i];
758 # Ignore line if requested.
759 foreach my $ignore (@option_ignore_line) {
760 next LINE if $line =~ /$ignore/;
764 if (is_non_verbose_build($line, $input[$i + 1], \$skip)) {
765 if (not $option_buildd) {
766 error_non_verbose_build($line);
768 $statistics{commands_nonverbose}++;
770 $exit |= $exit_code{non_verbose_build};
773 # Even if it's a verbose build, we might have to skip this line.
776 # Remove everything until and including the compiler command. Makes
777 # checks easier and faster.
778 $line =~ s/^.*?$cc_regex//o;
779 # "([...] test.c)" is not detected as 'test.c' - fix this by removing
780 # the brace and similar characters.
781 $line =~ s/['")]+$//;
783 # Skip unnecessary tests when only preprocessing.
784 my $flag_preprocess = 0;
791 # Preprocess, compile, assemble.
792 if ($line =~ /\s(-E|-S|-c)\b/) {
794 $flag_preprocess = 1 if $1 eq '-E';
795 $compile = 1 if $1 eq '-S' or $1 eq '-c';
796 # Dependency generation for Makefiles. The other flags (-MF -MG -MP
797 # -MT -MQ) are always used with -M/-MM.
798 } elsif ($line =~ /\s(?:-M|-MM)\b/) {
800 # Otherwise assume we are linking.
805 # -MD/-MMD also cause dependency generation, but they don't imply -E!
806 if ($line =~ /\s(?:-MD|-MMD)\b/) {
808 $flag_preprocess = 0;
811 # Dependency generation for Makefiles, no preprocessing or other flags
815 # Get all file extensions on this line.
816 my @extensions = $line =~ /$file_extension_regex/go;
817 # Ignore all unknown extensions to speedup the search below.
818 @extensions = grep { exists $extension{$_} } @extensions;
820 # These file types don't require preprocessing.
821 if (extension_found(\%extensions_no_preprocess, @extensions)) {
824 # These file types require preprocessing.
825 if (extension_found(\%extensions_preprocess, @extensions)) {
829 # If there are source files then it's compiling/linking in one step
830 # and we must check both. We only check for source files here, because
831 # header files cause too many false positives.
832 if (not $flag_preprocess
833 and extension_found(\%extensions_compile_link, @extensions)) {
834 # Assembly files don't need CFLAGS.
835 if (not extension_found(\%extensions_compile, @extensions)
836 and extension_found(\%extensions_no_compile, @extensions)) {
844 # Assume CXXFLAGS are required when a C++ file is specified in the
848 and extension_found(\%extensions_compile_cpp, @extensions)) {
853 if ($option_buildd) {
854 $statistics{preprocess}++ if $preprocess;
855 $statistics{compile}++ if $compile;
856 $statistics{compile_cpp}++ if $compile_cpp;
857 $statistics{link}++ if $link;
860 # Check hardening flags.
862 if ($compile and not all_flags_used($line, \@missing, @cflags)
863 # Libraries linked with -fPIC don't have to (and can't) be
864 # linked with -fPIE as well. It's no error if only PIE flags
866 and not pic_pie_conflict($line, $harden_pie, \@missing, @def_cflags_pie)
867 # Assume dpkg-buildflags returns the correct flags.
868 and not $line =~ /`dpkg-buildflags --get CFLAGS`/) {
869 if (not $option_buildd) {
870 error_flags('CFLAGS missing', \@missing, \%flag_renames, $input[$i]);
872 $statistics{compile_missing}++;
874 $exit |= $exit_code{flags_missing};
875 } elsif ($compile_cpp and not all_flags_used($line, \@missing, @cflags)
876 # Libraries linked with -fPIC don't have to (and can't) be
877 # linked with -fPIE as well. It's no error if only PIE flags
879 and not pic_pie_conflict($line, $harden_pie, \@missing, @def_cflags_pie)
880 # Assume dpkg-buildflags returns the correct flags.
881 and not $line =~ /`dpkg-buildflags --get CXXFLAGS`/) {
882 if (not $option_buildd) {
883 error_flags('CXXFLAGS missing', \@missing, \%flag_renames, $input[$i]);
885 $statistics{compile_cpp_missing}++;
887 $exit |= $exit_code{flags_missing};
889 if ($preprocess and not all_flags_used($line, \@missing, @cppflags)
890 # Assume dpkg-buildflags returns the correct flags.
891 and not $line =~ /`dpkg-buildflags --get CPPFLAGS`/) {
892 if (not $option_buildd) {
893 error_flags('CPPFLAGS missing', \@missing, \%flag_renames, $input[$i]);
895 $statistics{preprocess_missing}++;
897 $exit |= $exit_code{flags_missing};
899 if ($link and not all_flags_used($line, \@missing, @ldflags)
900 # Same here, -fPIC conflicts with -fPIE.
901 and not pic_pie_conflict($line, $harden_pie, \@missing, @def_ldflags_pie)
902 # Assume dpkg-buildflags returns the correct flags.
903 and not $line =~ /`dpkg-buildflags --get LDFLAGS`/) {
904 if (not $option_buildd) {
905 error_flags('LDFLAGS missing', \@missing, \%flag_renames, $input[$i]);
907 $statistics{link_missing}++;
909 $exit |= $exit_code{flags_missing};
914 # Print statistics for buildd mode, only output in this mode.
915 if ($option_buildd) {
918 if ($statistics{preprocess_missing}) {
919 push @warning, sprintf "CPPFLAGS %d (of %d)",
920 $statistics{preprocess_missing},
921 $statistics{preprocess};
923 if ($statistics{compile_missing}) {
924 push @warning, sprintf "CFLAGS %d (of %d)",
925 $statistics{compile_missing},
926 $statistics{compile};
928 if ($statistics{compile_cpp_missing}) {
929 push @warning, sprintf "CXXFLAGS %d (of %d)",
930 $statistics{compile_cpp_missing},
931 $statistics{compile_cpp};
933 if ($statistics{link_missing}) {
934 push @warning, sprintf "LDFLAGS %d (of %d)",
935 $statistics{link_missing},
938 if (scalar @warning) {
939 local $" = ', '; # array join string
940 print "W-dpkg-buildflags-missing @warning missing\n";
943 if ($statistics{commands_nonverbose}) {
944 printf "W-compiler-flags-hidden %d (of %d) hidden\n",
945 $statistics{commands_nonverbose},
946 $statistics{commands},
958 blhc - build log hardening check, checks build logs for missing hardening flags
962 B<blhc> [I<options>] I<E<lt>dpkg-buildpackage build log fileE<gt>..>
966 blhc is a small tool which checks build logs for missing hardening flags and
967 other important warnings. It's licensed under the GPL 3 or later.
975 Force check for all +all (+pie, +bindnow) hardening flags. By default it's
978 =item B<--arch> I<architecture>
980 Set the specific architecture (e.g. amd64, armel, etc.), automatically
981 disables hardening flags not available on this architecture. Is detected
982 automatically if dpkg-buildpackage is used.
986 Force check for all +bindnow hardening flags. By default it's auto detected.
990 Special mode for buildds when automatically parsing log files. The following
991 changes are in effect:
997 Print tags instead of normal warnings, see README file for a list of possible
1002 Don't check hardening flags in old log files (if dpkg-dev << 1.16.1 is
1007 Don't require Term::ANSIColor.
1013 Use colored (ANSI) output for warning messages.
1015 =item B<--ignore-flag> I<flag>
1017 Don't print an error when the specific flag is missing in a compiler line.
1018 I<flag> is a string.
1020 Used to prevent false positives. This option can be specified multiple times.
1022 =item B<--ignore-line> I<regex>
1024 Ignore lines matching the given Perl regex. I<regex> is automatically anchored
1025 at the beginning and end of the line to prevent false negatives.
1027 B<NOTE>: Not the input lines are checked, but the lines which are displayed in
1028 warnings (which have line continuation resolved).
1030 Used to prevent false positives. This option can be specified multiple times.
1034 Force check for all +pie hardening flags. By default it's auto detected.
1036 =item B<-h -? --help>
1038 Print available options.
1042 Print version number and license.
1046 Auto detection for B<--pie> and B<--bindnow> only works if at least one
1047 command uses the required hardening flag (e.g. -fPIE). Then it's required for
1048 all other commands as well.
1052 The exit status is a "bit mask", each listed status is ORed when the error
1053 condition occurs to get the result.
1063 No compiler commands were found.
1067 Invalid arguments/options given to blhc.
1075 Missing hardening flags.
1079 Hardening wrapper detected, no tests performed.
1085 Simon Ruderich, E<lt>simon@ruderich.orgE<gt>
1087 =head1 COPYRIGHT AND LICENSE
1089 Copyright (C) 2012 by Simon Ruderich
1091 This program is free software: you can redistribute it and/or modify
1092 it under the terms of the GNU General Public License as published by
1093 the Free Software Foundation, either version 3 of the License, or
1094 (at your option) any later version.
1096 This program is distributed in the hope that it will be useful,
1097 but WITHOUT ANY WARRANTY; without even the implied warranty of
1098 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
1099 GNU General Public License for more details.
1101 You should have received a copy of the GNU General Public License
1102 along with this program. If not, see <http://www.gnu.org/licenses/>.