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|
#!/usr/bin/perl
use strict;
use warnings;
use File::Find ();
use File::Spec ();
# Dummy filename for when we find that a module is actually built-in
use constant BUILTIN => "<builtin>";
my $defconfigdir = $ENV{KW_DEFCONFIG_DIR};
if (!defined($defconfigdir)) {
print STDERR "$0: Required environment variable \$KW_DEFCONFIG_DIR is not defined\n";
exit 2;
}
my $sysdir="$defconfigdir/modules/";
my $os = `dpkg-architecture -qDEB_HOST_ARCH_OS`;
chomp $os;
my @module_files;
my @modules_builtin;
my %modules;
my %missing;
my %loaded;
sub find_all_modules {
my ($moddir) = @_;
File::Find::find({
follow => 1, # If $moddir is a symlink, follow it.
wanted => sub {
if (/\.ko(?:\.(?:xz|zstd))?$/) {
push @module_files,
File::Spec->abs2rel($File::Find::name,
$moddir);
}
}
}, $moddir);
if ($os eq 'linux') {
if (open(my $builtin, "$moddir/modules.builtin")) {
while (<$builtin>) {
chomp;
push @modules_builtin, $_;
}
close($builtin);
}
}
}
sub wildcard_to_regexp {
my ($pattern) = @_;
# Convert to regexp syntax. We handle '**' as a recursive
# match-all. We don't bother to handle '\' or '[...]'.
my %glob_re = ('?' => '[^/]',
'*' => '[^/]*',
'**' => '.*',
'' => '');
my $extra_wild;
if ($os eq 'linux') {
# Linux treats '-' and '_' as equivalent, and neither
# is used consistently. So let each match the other.
$glob_re{'-'} = $glob_re{'_'} = '[-_]';
$extra_wild = '|[-_]';
} else {
$extra_wild = '';
}
$pattern =~ s/(.*?)(\*\*|[?*]$extra_wild|)/
quotemeta($1) . $glob_re{$2}/eg;
return $pattern;
}
sub is_really_wild {
my ($pattern) = @_;
return scalar($pattern =~ /[?*]/);
}
sub find_modules {
my ($moddir, $pattern, $optional) = @_;
my $wild = is_really_wild($pattern);
my @regexps;
if ($wild) {
my $re;
if ($pattern =~ m|^([^?*]*)/(.*)|) {
my $subdir = $1;
if (! -d "$moddir/$subdir") {
if (-d "$moddir/kernel/$subdir") {
$subdir = "kernel/$subdir";
} elsif (!$optional) {
print STDERR "pattern $pattern refers to nonexistent subdirectory\n";
unless ($ENV{KW_CHECK_NONFATAL}) {
$! = 1;
die;
}
} else {
return ();
}
}
$re = quotemeta($subdir) . '/' . wildcard_to_regexp($2);
} else {
$re = wildcard_to_regexp($pattern);
}
# Add module suffix; anchor at start and end of string
@regexps = ('^' . $re . '\.ko(?:\.(?:xz|zstd))?$');
} else {
# If pattern doesn't include a wildcard, find the
# module in any subdir, but prefer a module in the
# kernel subdir. We still do wildcard processing
# to handle equivalence of '-' and '_' for Linux.
my $re = wildcard_to_regexp($pattern);
@regexps = ('^kernel/(?:.*/)?' . $re . '\.ko(?:\.(?:xz|zstd))?$',
'(?:^|/)' . $re . '\.ko(?:\.(?:xz|zstd))?$');
}
my @modules;
regexp_loop:
for my $re (@regexps) {
for (@module_files) {
if (/$re/) {
push @modules, $_;
last regexp_loop unless $wild;
}
}
if (!$wild && grep(/$re/, @modules_builtin)) {
push @modules, BUILTIN;
last;
}
}
return @modules;
}
sub loadlist {
my ($list, $moddir) = @_;
if ($loaded{$list}) {
$! = 1;
die "include loop detected loading $list\n";
}
$loaded{$list}=1;
my $fh;
unless (open($fh, $list)) {
$! = 1;
die "cannot read $list\n";
}
while (<$fh>) {
s/^\s*//;
s/\s*$//;
if (/^#include\s+<(.*)>$/) {
my $basename=$1;
loadlist($sysdir.$basename, $moddir);
}
elsif (/^#include\s+"(.*)"$/) {
my $include=$1;
my ($dirname)=$list=~m!(.*/).*!;
loadlist($dirname.$include, $moddir);
}
elsif (/^$/) {
next;
}
elsif (/^#/) {
next;
}
elsif (/^(.*) -$/) {
# If this was explicitly included and is missing,
# we no longer care
delete $missing{$1};
for (find_modules($moddir, $1, 1)) {
delete $modules{$_};
}
}
else {
my ($pattern, $optional, @found);
if (/^(.*) \?$/) {
($pattern, $optional) = ($1, 1);
}
# Support dash prefixing for backwards compatibility.
elsif (/^-(.*)/) {
($pattern, $optional) = ($1, 1);
} else {
($pattern, $optional) = ($_, 0);
}
@found = find_modules($moddir, $pattern, $optional);
for (@found) {
$modules{$_} = 1 unless $_ eq BUILTIN;
}
# Check for missing required module. This is not
# yet an error as it might be excluded later.
if (!is_really_wild($pattern) && !$optional
&& !@found) {
$missing{$pattern} = 1;
}
}
}
close $fh;
}
if (@ARGV < 2) {
print STDERR "$0: Required parameters missing\n";
exit 2;
}
my ($file, $moddir) = @ARGV;
find_all_modules($moddir);
loadlist($file, $moddir);
if (keys %missing) {
for (keys %missing) {
print STDERR "missing module $_\n";
}
exit 1 unless $ENV{'KW_CHECK_NONFATAL'};
}
foreach my $m (sort keys %modules) {
print "$m\n";
}
|
