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package modules::modprobe_conf; # $Id: modprobe_conf.pm 259199 2009-08-13 10:18:59Z pterjan $
use log;
use common;
# perl_checker: require modules::any_conf
our @ISA = qw(modules::any_conf);
sub file { '/etc/modprobe.conf' }
sub handled_fields { qw(alias options install remove) }
sub mapping {
my ($_conf, @modules) = @_;
my @l = map { modules::mapping_24_26($_) } @modules;
wantarray() ? @l : $l[0];
}
sub get_above {
my ($conf, $module) = @_;
$module = $conf->mapping($module);
my (undef, $after) = parse_non_virtual($module, $conf->{$module}{install}) or return;
my ($l, $_other_cmds) = partition_modprobes($after);
@$l;
}
sub set_above {
my ($conf, $module, $o_modules) = @_;
$module = $conf->mapping($module);
my @modules = $conf->mapping(split(' ', $o_modules || ''));
{ #- first add to "install" command
my ($before, $after) = parse_non_virtual($module, $conf->{$module}{install});
my ($_previous_modules, $other_cmds) = partition_modprobes($after || '');
$after = join('; ', @$other_cmds, map { "/sbin/modprobe $_" } @modules);
$conf->{$module}{install} = unparse_non_virtual($module, '--ignore-install', $before, $after);
}
{ #- then to "remove" command
my ($before, $after) = parse_non_virtual($module, $conf->{$module}{remove});
my ($_previous_modules, $other_cmds) = partition_modprobes($before || '');
$before = join('; ', @$other_cmds, map { "/sbin/modprobe -r $_" } @modules);
$conf->{$module}{remove} = unparse_non_virtual($module, '-r --ignore-remove', $before, $after);
}
}
sub create_from_old() {
#- use module-init-tools script
run_program::rooted($::prefix, "/sbin/generate-modprobe.conf", ">", file());
}
sub read {
my ($type, $o_file) = @_;
my $file = $o_file || do {
my $f = $::prefix . file();
if (!-e $f && -e "$::prefix/etc/modules.conf") {
create_from_old();
}
$f;
};
my $conf = modules::any_conf::read_handled($type, $file);
extract_probeall_field($conf);
$conf;
}
sub write {
my ($conf, $o_file) = @_;
remove_probeall_field($conf);
my $_b = before_leaving { extract_probeall_field($conf) };
modules::any_conf::write($conf, $o_file);
}
################################################################################
sub remove_braces {
my ($s) = @_;
$s =~ s/^\s*\{\s*(.*)\s*;\s*\}\s*$/$1/;
$s;
}
sub parse_non_virtual {
my ($module, $s) = @_;
my ($before, $options, $after) =
$s =~ m!^(?:(.*);)?
\s*(?:/sbin/)?modprobe\s+(-\S+\s+)*\Q$module\E
\s*(?:&&\s*(.*))?$!x
or return;
$options =~ /--ignore-(install|remove)\b/ or return;
($before, $after) = map { remove_braces($_ || '') } $before, $after;
$after =~ s!\s*;\s*/bin/true$!!;
$before, $after;
}
sub unparse_non_virtual {
my ($module, $mode, $before, $after) = @_;
($before ? "$before; " : '')
. (($before || $after) ? "/sbin/modprobe --first-time $mode $module" : '')
. ($after ? " && { $after; /bin/true; }" : '');
}
sub partition_modprobes {
my ($s) = @_;
my (@modprobes, @other_cmds);
my @l = split(/\s*;\s*/, $s);
foreach (@l) {
if (m!^(?:/sbin/)?modprobe\s+(?:-r\s+)?(\S+)$!) {
push @modprobes, $1;
} else {
push @other_cmds, $1;
}
}
\@modprobes, \@other_cmds;
}
sub parse_for_probeall {
my ($module, $s) = @_;
parse_non_virtual($module, $s) and return;
if ($s =~ /[{&|]/) {
log::l("weird install line in modprobe.conf for $module: $s");
return;
}
$s ne '/bin/true' or return; #- we have "alias $module off" here
$s =~ s!\s*;\s*/bin/true$!!;
my ($l, $other_cmds) = partition_modprobes($s);
@$other_cmds ? undef : $l;
}
sub extract_probeall_field {
my ($conf) = @_;
foreach my $module (keys %$conf) {
$conf->{$module}{install} or next;
my $l = parse_for_probeall($module, $conf->{$module}{install}) or next;
$conf->{$module}{probeall} = join(' ', @$l);
delete $conf->{$module}{install};
}
}
sub remove_probeall_field {
my ($conf) = @_;
foreach my $module (keys %$conf) {
my $modules = delete $conf->{$module}{probeall} or next;
$conf->{$module}{install} = join('; ', (map { "/sbin/modprobe $_" } split(' ', $modules)), '/bin/true');
}
}
1;
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