--- /dev/null
+# shared-libs -- lintian check script -*- perl -*-
+
+# Copyright (C) 1998 Christian Schwarz
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, you can find it on the World Wide
+# Web at http://www.gnu.org/copyleft/gpl.html, or write to the Free
+# Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
+# MA 02110-1301, USA.
+
+package Lintian::shared_libs;
+use strict;
+
+use File::Basename;
+
+use Lintian::Data;
+use Dep;
+use Tags;
+use Util;
+
+sub run {
+
+# Libraries that should only be used in the presence of certain capabilities
+# may be located in subdirectories of the standard ldconfig search path with
+# one of the following names.
+my %hwcap_dir = map { $_ => 1 }
+ qw( i486 i586 i686 cmov tls );
+
+# The following architectures should always have a STACK setting in shared
+# libraries to disable executable stack. Other architectures don't always add
+# this section and therefore can't be checked.
+my %stack_arches = map { $_ => 1 }
+ qw( alpha
+ amd64
+ i386
+ m68k
+ powerpc
+ s390
+ sparc
+ );
+
+my $ldconfig_dirs = Lintian::Data->new('shared-libs/ldconfig-dirs');
+my $file;
+my $must_call_ldconfig;
+my $postrm = "control/postrm";
+my $postinst = "control/postinst";
+my $preinst = "control/preinst";
+my $prerm = "control/prerm";
+my $shlibs_control_file = "control/shlibs";
+my $symbols_control_file = "control/symbols";
+my %SONAME;
+my %INTERP;
+my %STACK;
+my %TEXTREL;
+my %objsomething;
+my %sharedobject;
+my %index_info;
+my %link_info;
+my @shlibs;
+my @words;
+
+# ---end-of-configuration-part---
+
+my $pkg = shift;
+my $type = shift;
+
+# 1st step: get info about shared libraries installed by this package
+open(IN, '<', "objdump-info")
+ or fail("cannot find objdump-info for $type package $pkg");
+while (<IN>) {
+ chop;
+
+ #skip blank lines
+ next if m/^\s*$/o;
+
+ if (m/^-- (\S+)\s*$/o) {
+ $file = $1;
+ $file =~ s,^(\./)?,,;
+ } elsif (m/^\s*SONAME\s+(\S+)/o) {
+ $SONAME{$file} = $1;
+ } elsif (m/^\s*TEXTREL\s/o) {
+ $TEXTREL{$file} = 1;
+ } elsif (m/^\s*INTERP\s/) {
+ $INTERP{$file} = 1;
+ } elsif (m/^\s*STACK\s/) {
+ $STACK{$file} = 0;
+ } else {
+ if (defined $STACK{$file} and $STACK{$file} eq 0) {
+ m/\sflags\s+(\S+)/o;
+ $STACK{$file} = $1;
+ }
+ else {
+ $objsomething{$file} = 1;
+ }
+ }
+}
+close(IN);
+
+open (IN, '<', "file-info")
+ or fail("cannot find file-info for $type package $pkg");
+while (<IN>) {
+ chomp;
+ # with file names containing colons and spaces, we're fucked.
+ m/^(?:\.\/)?(.+?):\s+(.*)$/o or fail("unrecognized file(1) output: $_");
+ my ($file,$info) = ($1,$2);
+ if ($info =~ m/^[^,]*\bELF\b/ && $info =~ m/shared object/) {
+ $sharedobject{$file} = 1;
+ }
+}
+close(IN);
+
+# 2nd step: read package contents
+my %files;
+open(IN, '<', "index") or fail("cannot open index file index: $!");
+while (<IN>) {
+ chop;
+ @words = split(/\s+/o, $_, 6);
+ my $perm = $words[0];
+ my $cur_file = $words[5];
+ $cur_file =~ s,^(\./),,;
+ $cur_file =~ s/ link to .*//;
+
+ if ($perm =~ m/^l/) {
+ my $link;
+ ($cur_file, $link) = split(' -> ', $cur_file);
+ $link_info{$cur_file} = $link;
+ }
+ $index_info{$cur_file} = 1;
+ $files{$cur_file} = $perm;
+}
+
+for (keys %files) {
+ my ($cur_file, $perm) = ($_, $files{$_});
+
+ # shared library?
+ if (exists $SONAME{$cur_file} or
+ ($link_info{$cur_file} and exists $SONAME{abs_path(dirname($cur_file)."/".$link_info{$cur_file})})) {
+ # yes!!
+
+ my ($real_file, $real_perm);
+ if ($SONAME{$cur_file}) {
+ $real_file = $cur_file;
+ $real_perm = $perm;
+ } else {
+ $real_file = abs_path(dirname($cur_file)."/".$link_info{$cur_file});
+ $real_perm = $files{$real_file} || $perm;
+ }
+
+ # Now that we're sure this is really a shared library, report on
+ # non-PIC problems.
+ if ($cur_file eq $real_file and $TEXTREL{$cur_file}) {
+ tag "shlib-with-non-pic-code", "$cur_file";
+ }
+
+ # don't apply the permission checks to links
+ # since this only results in doubled messages
+ if ($cur_file eq $real_file) {
+ # executable?
+ if ($real_perm =~ m/x/) {
+ # yes. But if the library has an INTERP section, it's designed
+ # to do something useful when executed, so don't report an error.
+ tag "shlib-with-executable-bit", $cur_file, sprintf("%04o",perm2oct($real_perm))
+ unless $INTERP{$real_file};
+ } elsif ($real_perm ne '-rw-r--r--') {
+ # bad permissions
+ tag "shlib-with-bad-permissions", $cur_file, sprintf("%04o",perm2oct($real_perm));
+ }
+ }
+
+ # Installed in a directory controlled by the dynamic linker? We have
+ # to strip off directories named for hardware capabilities.
+ my $dirname = dirname($cur_file);
+ my $last;
+ do {
+ $dirname =~ s%/([^/]+)$%%;
+ $last = $1;
+ } while ($last && $hwcap_dir{$last});
+ $dirname .= "/$last" if $last;
+ if ($ldconfig_dirs->known($dirname)) {
+ # yes! so postinst must call ldconfig
+ $must_call_ldconfig = $real_file;
+ }
+
+ # executable stack. We can only warn about a missing section on some
+ # architectures. Only warn if there's an Architecture field; if
+ # that's missing, we'll already be complaining elsewhere.
+ if (exists $objsomething{$cur_file}) {
+ if (not defined $STACK{$cur_file}) {
+ if (open(FH, '<', "fields/architecture")) {
+ my $arch = <FH>;
+ close FH;
+ chomp $arch;
+ tag "shlib-without-PT_GNU_STACK-section", $cur_file
+ if $stack_arches{$arch};
+ }
+ } elsif ($STACK{$cur_file} ne "rw-") {
+ tag "shlib-with-executable-stack", $cur_file;
+ }
+ }
+ } elsif (exists $objsomething{$cur_file}
+ && $ldconfig_dirs->known(dirname($cur_file))
+ && exists $sharedobject{$cur_file}) {
+ tag "sharedobject-in-library-directory-missing-soname", "$cur_file";
+ }
+}
+
+close(IN);
+
+# 3rd step: check if shlib symlinks are present and in correct order
+for my $shlib_file (keys %SONAME) {
+ # file found?
+ if (not exists $index_info{$shlib_file}) {
+ fail("shlib $shlib_file not found in package (should not happen!)");
+ }
+
+ my ($dir, $shlib_name) = $shlib_file =~ m,(.*)/([^/]+)$,;
+
+ # not a public shared library, skip it
+ next unless $ldconfig_dirs->known($dir);
+
+ # symlink found?
+ my $link_file = "$dir/$SONAME{$shlib_file}";
+ if (not exists $index_info{$link_file}) {
+ tag "ldconfig-symlink-missing-for-shlib", "$link_file $shlib_file $SONAME{$shlib_file}";
+ } else {
+ # $link_file really another file?
+ if ($link_file eq $shlib_file) {
+ # the library file uses its SONAME, this is ok...
+ } else {
+ # $link_file really a symlink?
+ if (exists $link_info{$link_file}) {
+ # yes.
+
+ # $link_file pointing to correct file?
+ if ($link_info{$link_file} eq $shlib_name) {
+ # ok.
+ } else {
+ tag "ldconfig-symlink-referencing-wrong-file", "$link_file -> $link_info{$link_file} instead of $shlib_name";
+ }
+ } else {
+ tag "ldconfig-symlink-is-not-a-symlink", "$shlib_file $link_file";
+ }
+
+ # symlink after shlib?
+ if ($index_info{$link_file} < $index_info{$shlib_file}) {
+ tag "ldconfig-symlink-before-shlib-in-deb", "$link_file";
+ }
+ }
+ }
+
+ # determine shlib link name (w/o version)
+ $link_file =~ s/\.so.*$/.so/o;
+
+ # -dev package?
+ if ($pkg =~ m/\-dev$/o) {
+ # yes!!
+
+ # need shlib symlink
+ if (not exists $index_info{$link_file}) {
+ tag "dev-pkg-without-shlib-symlink", "$shlib_file $link_file";
+ }
+ } else {
+ # no.
+
+ # shlib symlink may not exist.
+ # if shlib doesn't _have_ a version, then $link_file and $shlib_file will
+ # be equal, and it's not a development link, so don't complain.
+ if (exists $index_info{$link_file} and $link_file ne $shlib_file) {
+ tag "non-dev-pkg-with-shlib-symlink", "$shlib_file $link_file";
+ }
+ }
+}
+
+# 4th step: check shlibs control file
+my $version;
+if (open (VERSION, '<', 'fields/version')) {
+ $version = <VERSION>;
+ close VERSION;
+ chomp $version;
+}
+my $provides = $pkg . "( = $version)";
+if (open (PROVIDES, '<', 'fields/provides')) {
+ my $line = <PROVIDES>;
+ close PROVIDES;
+ chomp $line;
+ $provides .= ", $line";
+}
+$provides = Dep::parse($provides);
+
+my %shlibs_control;
+my %symbols_control;
+
+@shlibs = grep { !m,^lib/libnss_[^.]+\.so(\.[0-9]+)$, } keys %SONAME;
+if ($#shlibs == -1) {
+ # no shared libraries included in package, thus shlibs control file should
+ # not be present
+ if (-f $shlibs_control_file) {
+ tag "pkg-has-shlibs-control-file-but-no-actual-shared-libs", "";
+ }
+} else {
+ # shared libraries included, thus shlibs control file has to exist
+ if (not -f $shlibs_control_file) {
+ if ($type ne 'udeb') {
+ for my $shlib (@shlibs) {
+ # skip it if it's not a public shared library
+ next unless $ldconfig_dirs->known(dirname($shlib));
+ tag "no-shlibs-control-file", "$shlib";
+ }
+ }
+ } else {
+ my %shlibs_control_used;
+ my @shlibs_depends;
+ open(SHLIBS, '<', $shlibs_control_file)
+ or fail("cannot open shlibs control file $shlibs_control_file for reading: $!");
+ while (<SHLIBS>) {
+ chop;
+ next if m/^\s*$/ or /^#/;
+
+ # We exclude udebs from the checks for correct shared library
+ # dependencies, since packages may contain dependencies on
+ # other udeb packages.
+ my $udeb="";
+ $udeb = "udeb: " if s/^udeb:\s+//o;
+ @words = split(/\s+/o,$_);
+ my $shlibs_string = $udeb.$words[0].' '.$words[1];
+ if ($shlibs_control{$shlibs_string}) {
+ tag "duplicate-entry-in-shlibs-control-file", $shlibs_string;
+ } else {
+ $shlibs_control{$shlibs_string} = 1;
+ push (@shlibs_depends, join (' ', @words[2 .. $#words]))
+ unless $udeb;
+ }
+ }
+ close(SHLIBS);
+ my $shlib_name;
+ for my $shlib (@shlibs) {
+ $shlib_name = $SONAME{$shlib};
+ $shlib_name = format_soname($shlib_name);
+ $shlibs_control_used{$shlib_name} = 1;
+ $shlibs_control_used{"udeb: ".$shlib_name} = 1;
+ unless (exists $shlibs_control{$shlib_name}) {
+ # skip it if it's not a public shared library
+ next unless $ldconfig_dirs->known(dirname($shlib));
+ # no!!
+ tag "shlib-missing-in-control-file", $shlib_name, 'for', $shlib;
+ }
+ }
+ for $shlib_name (keys %shlibs_control) {
+ tag "unused-shlib-entry-in-control-file", $shlib_name
+ unless $shlibs_control_used{$shlib_name};
+ }
+
+ # Check that all of the packages listed as dependencies in the shlibs
+ # file are satisfied by the current package or its Provides.
+ # Normally, packages should only declare dependencies in their shlibs
+ # that they themselves can satisfy.
+ #
+ # Deduplicate the list of dependencies before warning so that we don't
+ # dupliate warnings.
+ my %seen;
+ @shlibs_depends = grep { !$seen{$_}++ } @shlibs_depends;
+ for my $depend (@shlibs_depends) {
+ unless (Dep::implies($provides, Dep::parse($depend))) {
+ tag "shlibs-declares-dependency-on-other-package", $depend;
+ }
+ }
+ }
+}
+
+# 5th step: check symbols control file
+if ($#shlibs == -1) {
+ # no shared libraries included in package, thus symbols control file should
+ # not be present
+ if (-f $symbols_control_file) {
+ tag "pkg-has-symbols-control-file-but-no-shared-libs", "";
+ }
+} elsif (not -f $symbols_control_file) {
+ if ($type ne 'udeb') {
+ for my $shlib (@shlibs) {
+ # skip it if it's not a public shared library
+ next unless $ldconfig_dirs->known(dirname($shlib));
+ tag "no-symbols-control-file", "$shlib";
+ }
+ }
+} elsif (open(IN, '<', $symbols_control_file)) {
+ my $version_wo_rev = $version;
+ $version_wo_rev =~ s/^(.+)-([^-]+)$/$1/;
+ my ($full_version_count, $full_version_sym) = (0, undef);
+ my ($debian_revision_count, $debian_revision_sym) = (0, undef);
+ my ($soname, $dep_package, $dep);
+ my %symbols_control_used;
+ my @symbols_depends;
+ my $dep_templates = 0;
+ my $meta_info_seen = 0;
+
+ while (<IN>) {
+ chomp;
+ next if m/^\s*$/ or /^#/;
+
+ if (m/^([^\s|*]\S+)\s(\S+)(?:\s(\S+))?/) {
+ # soname, main dependency template
+
+ ($soname, $dep_package, $dep) = ($1, $2, $3);
+ $dep ||= '';
+ $soname = format_soname($soname);
+
+ if ($symbols_control{$soname}) {
+ tag "duplicate-entry-in-symbols-control-file", $soname;
+ } else {
+ $symbols_control{$soname} = 1;
+ push @symbols_depends, $dep_package . ' ' . $dep;
+ }
+
+ $dep_templates = 0;
+ $meta_info_seen = 0;
+ } elsif (m/^\|\s+(\S+)\s(\S+(\s\S+)?)$/) {
+ # alternative dependency template
+
+ if ($meta_info_seen or not defined $soname) {
+ tag "syntax-error-in-symbols-file", $.;
+ }
+
+ ($dep_package, $dep) = ($1, $2);
+ push @symbols_depends, $dep_package . ' ' . $dep;
+ $dep_templates++;
+ } elsif (m/^\*\s(\S+):\s(\S+)/) {
+ # meta-information
+
+ # This should probably be in a hash, but there's
+ # only one supported value currently
+ tag "unknown-meta-field-in-symbols-file", "$1, line $."
+ unless $1 eq 'Build-Depends-Package';
+ tag "syntax-error-in-symbols-file", $.
+ if $dep_templates > 0;
+
+ $meta_info_seen = 1;
+ } elsif (m/^\s+(\S+)\s(\S+)(?:\s(\S+(\s\S+)?))?$/) {
+ # Symbol definition
+
+ tag "syntax-error-in-symbols-file", $.
+ unless defined $soname;
+
+ my ($sym, $v, $dep_order) = ($1, $2, $3);
+ $dep_order ||= '';
+
+ if (($v eq $version) and ($version =~ /-/)) {
+ $full_version_sym ||= $sym;
+ $full_version_count++;
+ }
+ if (($v =~ /-/) and (not $v =~ /~$/) and ($v ne $version_wo_rev)) {
+ $debian_revision_sym ||= $sym;
+ $debian_revision_count++;
+ }
+
+ if (length $dep_order) {
+ if ($dep_order !~ /^\d+$/ or $dep_order > $dep_templates) {
+ tag "invalid-template-id-in-symbols-file", $.;
+ }
+ }
+ } else {
+ # Unparseable line
+
+ tag "syntax-error-in-symbols-file", $.;
+ }
+ }
+ close IN;
+ if ($full_version_count) {
+ $full_version_count--;
+ my $others = '';
+ if ($full_version_count > 0) {
+ $others = " and $full_version_count others";
+ }
+ tag "symbols-file-contains-current-version-with-debian-revision",
+ "on symbol $full_version_sym$others";
+ }
+ if ($debian_revision_count) {
+ $debian_revision_count--;
+ my $others = '';
+ if ($debian_revision_count > 0) {
+ $others = " and $debian_revision_count others";
+ }
+ tag "symbols-file-contains-debian-revision",
+ "on symbol $debian_revision_sym$others";
+ }
+ my $shlib_name;
+ for my $shlib (@shlibs) {
+ $shlib_name = $SONAME{$shlib};
+ $shlib_name = format_soname($shlib_name);
+ $symbols_control_used{$shlib_name} = 1;
+ $symbols_control_used{"udeb: ".$shlib_name} = 1;
+ unless (exists $symbols_control{$shlib_name}) {
+ # skip it if it's not a public shared library
+ next unless $ldconfig_dirs->known(dirname($shlib));
+ tag "shlib-missing-in-symbols-control-file", $shlib_name, 'for', $shlib;
+ }
+ }
+ for $shlib_name (keys %symbols_control) {
+ tag "unused-shlib-entry-in-symbols-control-file", $shlib_name
+ unless $symbols_control_used{$shlib_name};
+ }
+
+ # Check that all of the packages listed as dependencies in the symbols
+ # file are satisfied by the current package or its Provides.
+ # Normally, packages should only declare dependencies in their symbols
+ # files that they themselves can satisfy.
+ #
+ # Deduplicate the list of dependencies before warning so that we don't
+ # dupliate warnings.
+ my %seen;
+ @symbols_depends = grep { !$seen{$_}++ } @symbols_depends;
+ for my $depend (@symbols_depends) {
+ unless (Dep::implies($provides, Dep::parse($depend))) {
+ tag "symbols-declares-dependency-on-other-package", $depend;
+ }
+ }
+}
+
+# Compare the contents of the shlibs and symbols control files
+if (keys %shlibs_control and keys %symbols_control) {
+ for my $key (keys %symbols_control) {
+ unless (exists $shlibs_control{$key}) {
+ tag "symbols-declared-but-not-shlib", $key;
+ }
+ }
+}
+
+# 6th step: check pre- and post- control files
+if (-f $preinst) {
+ local $_ = slurp_entire_file($preinst);
+ if (/^[^\#]*\bldconfig\b/m) {
+ tag "preinst-calls-ldconfig", ""
+ }
+}
+
+my $we_call_postinst=0;
+if (-f $postinst) {
+ local $_ = slurp_entire_file($postinst);
+
+ # Decide if we call ldconfig
+ if (/^[^\#]*\bldconfig\b/m) {
+ $we_call_postinst=1;
+ }
+}
+
+if ($type eq 'udeb') {
+ tag "udeb-postinst-must-not-call-ldconfig"
+ if $we_call_postinst;
+} else {
+ tag "postinst-has-useless-call-to-ldconfig", ""
+ if $we_call_postinst and not $must_call_ldconfig;
+ tag "postinst-must-call-ldconfig", "$must_call_ldconfig"
+ if not $we_call_postinst and $must_call_ldconfig;
+}
+
+if (-f $prerm) {
+ local $_ = slurp_entire_file($prerm);
+ if (/^[^\#]*\bldconfig\b/m) {
+ tag "prerm-calls-ldconfig", "";
+ }
+}
+
+if (-f $postrm) {
+ local $_ = slurp_entire_file($postrm);
+
+ # Decide if we call ldconfig
+ if (/^[^\#]*\bldconfig\b/m) {
+ tag "postrm-has-useless-call-to-ldconfig", ""
+ unless $must_call_ldconfig;
+ } else {
+ tag "postrm-should-call-ldconfig", "$must_call_ldconfig"
+ if $must_call_ldconfig;
+ }
+
+ # Decide if we do it safely
+ s/\bldconfig\b/BldconfigB/g;
+ s/[ \t]//g;
+ # this one matches code from debhelper
+ s/^if\["\$1"=.?remove.?\];?\n*then\n*BldconfigB//gm;
+ # variations...
+ s/^if\[.?remove.?="\$1"\];?\n*then\n*BldconfigB//gm;
+ s/^\["\$1"=.?remove.?\]\&&BldconfigB//gm;
+ s/^\[.?remove.?="\$1"\]&&BldconfigB//gm;
+ s/remove(?:\|[^)]+)*\).*?BldconfigB.*?(;;|esac)//s;
+
+ if (/^[^\#]*BldconfigB/m) {
+ tag "postrm-unsafe-ldconfig", "";
+ }
+}
+
+}
+
+# make /tmp/baz/baz.txt from /tmp/foo/../bar/../baz/baz.txt
+sub abs_path {
+ my $path = shift;
+ while($path =~ s!/[^/]*/\.\./!/!g){1};
+ return $path;
+}
+
+sub format_soname {
+ my $soname = shift;
+
+ # libfoo.so.X.X
+ if ($soname =~ m/(.+)\.so\.(.*)$/) {
+ $soname = "$1 $2";
+ # libfoo-X.X.so
+ } elsif ($soname =~ m/(.+)\-(\w[\w\.]*)\.so$/) {
+ $soname = "$1 $2";
+ }
+
+ return $soname
+}
+
+1;
+
+# Local Variables:
+# indent-tabs-mode: t
+# cperl-indent-level: 4
+# End:
+# vim: syntax=perl sw=4 ts=8
projects / maemian / blobdiff