package common; # $Id: common.pm 245955 2008-09-18 14:19:04Z pixel $ use MDK::Common; se diagnostics; use strict; BEGIN { eval { require Locale::gettext } } #- allow common.pm to be used in drakxtools-backend without perl-Locale-gettext use log; use run_program; use Exporter; our @ISA = qw(Exporter); our @EXPORT = qw($SECTORSIZE N P N_ check_for_xserver files_exist formatTime MB formatXiB get_parent_uid is_running makedev mageia_release mageia_release_info removeXiBSuffix require_root_capability setVirtual set_alternative set_l10n_sort set_permissions to_utf8 translate unmakedev); # perl_checker: RE-EXPORT-ALL push @EXPORT, @MDK::Common::EXPORT; =head1 SYNOPSYS B re-export L and offers a couple widely used functions. =cut $::prefix ||= ""; # no warning #-##################################################################################### #- Globals #-##################################################################################### our $SECTORSIZE = 512; =head1 Functions =head2 Translating =over =item N($format, ...) translate a message by calling gettext(). eg: N("Summary") N("File %s is on %s", "/etc/passwd", "/dev/sda2") It must B be used called before L is initialized, otherwise the gettext is not forced to UTF-8. =cut sub N { my ($s, @para) = @_; sprintf(translate($s), @para); } =item N_($format, @param) Similar to C, but message is not actually translated. It tags the message as translatable so that it will end in the translation catalogs. In order for the message to be translated, C must be called before using the message. =cut sub N_ { $_[0] } =item P($s_singular, $s_plural, $nb, @extra_para) Similar to C, but two messages are provided: one for the singular case, one for the plural case. At runtime, a number is provided in order to choose the message to use. eg: P("%d package", "%d packages", $nb, $nb) =cut sub P { my ($s_singular, $s_plural, $nb, @para) = @_; sprintf(translate($s_singular, $s_plural, $nb), @para); } sub translate_real { my ($s, $o_plural, $o_nb) = @_; $s or return ''; my $s2; foreach (@::textdomains, 'libDrakX') { if ($o_plural) { $s2 = Locale::gettext::dngettext($_, $s, $o_plural, $o_nb); } else { $s2 = Locale::gettext::dgettext($_, $s); } # when utf8 pragma is in use, Locale::gettext() returns an utf8 string not tagged as such: c::set_tagged_utf8($s2) if !utf8::is_utf8($s2) && utf8::is_utf8($s); return $s2 if $s ne $s2 && $s2 ne $o_plural; } # didn't lookup anything or locale is "C": $s2; } =item remove_translate_context($string) Remove an ala-KDE context message. eg: "_: this is verb\nOpen" "_: Keep these entry short\nNetworking" =cut sub remove_translate_context { my ($s) = @_; #- translation with context, kde-like $s =~ s/^_:.*(?:\n)?//g; $s; } =item translate($string) Translate the message according to the current locale. The string is B tagged as translatable and will B end in translations catalogs. perl_checker only extracts strings tagged by C, C or C. =cut sub translate { my $s = translate_real(@_); $::one_message_has_been_translated ||= join(':', (caller(1))[1,2]); #- see mygtk3.pm remove_translate_context($s); } =back =head2 Conversion =over =item from_utf8($s) Convert an UTF-8 string into current locale's encoding. =cut sub from_utf8 { my ($s) = @_; Locale::gettext::iconv($s, "utf-8", undef); #- undef = locale charmap = nl_langinfo(CODESET) } =item to_utf8($s) The reverse of C: convert a string from current locale's encoding to UTF-8. Also make sure the string is properly tagged as UTF-8 as concerning Perl =cut sub to_utf8 { my ($s) = @_; my $str = Locale::gettext::iconv($s, undef, "utf-8"); #- undef = locale charmap = nl_langinfo(CODESET) c::set_tagged_utf8($str); $str; } =item set_l10n_sort() This is needed because text printed by L will always be encoded in UTF-8; we first check if LC_ALL is defined, because if it is, changing only LC_COLLATE will have no effect. =cut sub set_l10n_sort() { my $collation_locale = $ENV{LC_ALL}; if (!$collation_locale) { $collation_locale = c::setlocale(c::LC_COLLATE()); $collation_locale =~ /UTF-8/ or c::setlocale(c::LC_COLLATE(), "$collation_locale.UTF-8"); } } sub setVirtual { my ($vt_number) = @_; my $vt = ''; sysopen(my $C, "/dev/console", 2) or die "failed to open /dev/console: $!"; ioctl($C, c::VT_GETSTATE(), $vt) && ioctl($C, c::VT_ACTIVATE(), $vt_number) && ioctl($C, c::VT_WAITACTIVE(), $vt_number) or die "setVirtual failed"; unpack "S", $vt; } sub nonblock { my ($F) = @_; fcntl($F, c::F_SETFL(), fcntl($F, c::F_GETFL(), 0) | c::O_NONBLOCK()) or die "cannot fcntl F_SETFL: $!"; } =item makedev($major, $minor) Given major and minor device IDs, makedev() combines these to return a device ID (eg for mknod()) =cut sub makedev { ($_[0] << 8) | $_[1] } =item unmakedev($device_id) The reverse of C: given a device ID, it will return both major and minor device IDs. =cut sub unmakedev { $_[0] >> 8, $_[0] & 0xff } =item MB($suffixed_number) return a size in sector ie C is 2048 sectors, which is 1MB eg: MB("10") => 20480 =cut sub MB { my ($nb_MB) = @_; $nb_MB * 2048; } =item removeXiBSuffix($string) Remove the XiB suffix and return the number. eg: "10k" => 10240 "2M" => 2097152 =cut sub removeXiBSuffix { local $_ = shift; /(\d+)\s*kB?$/i and return $1 * 1024; /(\d+)\s*MB?$/i and return $1 * 1024 * 1024; /(\d+)\s*GB?$/i and return $1 * 1024 * 1024 * 1024; /(\d+)\s*TB?$/i and return $1 * 1024 * 1024 * 1024 * 1024; $_; } =item formatXiB($number [, $base]) The reverse of C, returns a nicely human size. eg: 2097152 => "2MB" The optional parameter enables to presize the unit size (default is one). eg for a 2000 512 sized sectors: formatXiB(2000, 512) =cut sub formatXiB { my ($newnb, $o_newbase) = @_; my $newbase = $o_newbase || 1; my $sign = $newnb < 0 ? -1 : 1; $newnb = abs(int($newnb)); my ($nb, $base); my $decr = sub { ($nb, $base) = ($newnb, $newbase); $base >= 1024 ? ($newbase = $base / 1024) : ($newnb = $nb / 1024); }; my $suffix; foreach (N("B"), N("KB"), N("MB"), N("GB"), N("TB")) { $decr->(); if ($newnb < 1 && $newnb * $newbase < 1) { $suffix = $_; last; } } my $v = $nb * $base; my $s = $v < 10 && int(10 * $v - 10 * int($v)); int($v * $sign) . ($s ? "." . abs($s) : '') . ($suffix || N("TB")); } sub formatTime { my ($s, $m, $h) = gmtime($_[0]); if ($h) { sprintf "%02d:%02d", $h, $m; } elsif ($m > 1) { N("%d minutes", $m); } elsif ($m == 1) { N("1 minute"); } else { N("%d seconds", $s); } } sub expand_symlinks_with_absolute_symlinks_in_prefix { my ($prefix, $link) = @_; my ($first, @l) = split '/', $link; $first eq '' or die "expand_symlinks: $link is relative\n"; my ($f, $l); foreach (@l) { $f .= "/$_"; while ($l = readlink "$prefix$f") { $f = $l =~ m!^/! ? $l : MDK::Common::File::concat_symlink($f, "../$l"); } } "$prefix$f"; } sub expand_symlinks_but_simple { my ($f) = @_; my $link = readlink($f); my $f2 = expand_symlinks($f); if ($link && $link !~ m|/|) { # put back the last simple symlink $f2 =~ s|\Q$link\E$|basename($f)|e; } $f2; } sub sync { &MDK::Common::System::sync } BEGIN { undef *formatError } sub formatError { my ($err) = @_; ref($err) eq 'SCALAR' and $err = $$err; log::l("error: $err"); &MDK::Common::String::formatError($err); } =item group_by($f, @list) Group the elements of @list in array references according to the $f comparaison function. =cut sub group_by(&@) { my $f = shift; @_ or return; my $e = shift; my @l = my $last_l = [$e]; foreach (@_) { if ($f->($e, $_)) { push @$last_l, $_; } else { push @l, $last_l = [$_]; $e = $_; } } @l; } =item group_n_lm($n, @list) Group the list by n. Returns a reference of lists of length n See also C from L =cut sub group_n_lm { my $n = shift; my @l; push @l, [ splice(@_, 0, $n) ] while @_; @l; } =item join_lines(@strings) Concat adjacent strings if laters begin with spaces. =cut sub join_lines { my @l; my $s; foreach (@_) { if (/^\s/) { $s .= $_; } else { push @l, $s if $s; $s = $_; } } @l, if_($s, $s); } sub read_alternative { my ($name) = @_; my $alt = readlink("$::prefix/etc/alternatives/$name"); $alt && $::prefix . $alt; } sub set_alternative { my ($command, $executable) = @_; #- check the existance of $executable as an alternative for $command #- (is this needed???) run_program::rooted_get_stdout($::prefix, 'update-alternatives', '--display', $command) =~ /^\Q$executable /m or return; #- this does not handle relative symlink, but neither does update-alternatives ;p symlinkf $executable, "$::prefix/etc/alternatives/$command"; } sub files_exist { and_(map { -f "$::prefix$_" } @_) } sub open_file { my ($file) = @_; my $F; open($F, $file) ? $F : do { log::l("Cannot open $file: $!"); undef }; } =item secured_file($f) A wrapper around c::is_secure_file(). Callers should probably just use C in /tmp. =cut # FIXME: callers should just use mkstemp in /tmp instead of relying on $TMPDIR || $ENV{HOME}/tmp # or we should just move the choice of directory from callers to here: # my $tmpdir = find { -d $_ } $ENV{TMPDIR}, "$ENV{HOME}/tmp", "$::prefix/tmp"; sub secured_file { my ($f) = @_; my $d = dirname($f); if (! -d $d) { mkdir_p($d); if ($d =~ /^$ENV{HOME}/) { my ($user) = grep { $_->[7] eq $ENV{HOME} } list_passwd(); chown($user->[2], $user->[3], $d); } } c::is_secure_file($f) or die "cannot ensure a safe $f"; $f; } sub unwind_protect { my ($to_do, $cleanup) = @_; my @l = eval { $to_do->() }; my $err = $@; $cleanup->(); $err and die $err; wantarray() ? @l : $l[0]; } sub with_private_tmp_file { my ($file, $content, $f) = @_; my $prev_umask = umask 077; unwind_protect(sub { MDK::Common::File::secured_output($file, $content); $f->($file); }, sub { umask $prev_umask; unlink $file; }); } sub chown_ { my ($b_recursive, $name, $group, @files) = @_; my ($uid, $gid) = (getpwnam($name) || $name, getgrnam($group) || $group); require POSIX; my $chown; $chown = sub { foreach (@_) { POSIX::lchown($uid, $gid, $_) or die "chown of file $_ failed: $!\n"; ! -l $_ && -d $_ && $b_recursive and &$chown(glob_($_)); } }; $chown->(@files); } sub set_permissions { my ($file, $perms, $o_owner, $o_group) = @_; # We only need to set the permissions during installation to be able to # print test pages. After installation udev does the business automatically. return 1 unless $::isInstall; if ($o_owner || $o_group) { $o_owner ||= (lstat($file))[4]; $o_group ||= (lstat($file))[5]; chown_(0, $o_owner, $o_group, $file); } chmod(oct($perms), $file) or die "chmod of file $file failed: $!\n"; } sub is_running { my ($name, $o_user) = @_; my $user = $o_user || $ENV{USER}; foreach (`ps -o '%P %p %c' -u $user`) { my ($ppid, $pid, $n) = /^\s*(\d+)\s+(\d+)\s+(.*)/; return $pid if $ppid != 1 && $pid != $$ && $n eq $name; } } =back =head2 Release files =over =item parse_release_file($prefix, $f, $part) Parses the $f release file in $prefix from the $part device. Returns a hash containing C, C, C, C & C fields. =cut sub parse_release_file { my ($prefix, $f, $part) = @_; chomp(my $s = cat_("$prefix$f")); my $version = $s =~ s/\s+release\s+(\S+)// && $1; my $arch = $s =~ s/\s+for\s+(\S+)// && $1; log::l("find_root_parts found $part->{device}: $s for $arch" . ($f !~ m!/etc/! ? " in special release file $f" : '')); { release => $s, version => $version, release_file => $f, part => $part, 'arch' => $arch }; } =item release_file($o_dir) Returns the release file name. =cut sub release_file { my ($o_dir) = @_; my @names = ('mageia-release', 'mandriva-release', 'mandrakelinux-release', 'mandrake-release', 'conectiva-release', 'release', 'redhat-release', 'fedora-release', 'SuSE-release'); find { -r "$o_dir$_" } ( (map { "/root/drakx/$_.upgrading" } @names), (map { "/etc/$_" } @names), ); } =item mageia_release_info() Parses C and returns a hash. =cut sub mageia_release_info() { parse_LDAP_namespace_structure(cat_('/etc/product.id')); } sub parse_LDAP_namespace_structure { my ($s) = @_; my %h = map { if_(/(.*?)=(.*)/, $1 => $2) } split(',', $s); \%h; } =item mageia_release($o_dir) returns the content of Mageia release file from given directory (optional). =cut sub mageia_release { my ($o_dir) = @_; my $f = release_file($o_dir); $f && chomp_(cat_("$o_dir$f")); } =back =head2 Misc =over =item get_parent_uid() Returns UID of the parent process. =cut sub get_parent_uid() { cat_('/proc/' . getppid() . '/status') =~ /Uid:\s*(\d+)/ ? $1 : undef; } =item require_root_capability() Ensure we are running as root. =cut sub require_root_capability() { return if $::testing || !$>; # we're already root die "you must be root to run this program"; } =item check_for_xserver() Test if we have access to X11. This eg enables interactive to use the proper backend (either text mode or GUI) =cut sub check_for_xserver() { if (!defined $::xtest) { $::xtest = 0; eval { require xf86misc::main; $::xtest = xf86misc::main::Xtest($ENV{DISPLAY}); } if $ENV{DISPLAY}; } return $::xtest; } =item unpack_with_refs($format, $s) special unpack: =over 4 =item * returning an array refs for each element like "C" =item * handling things like C at the end of the format =back =cut sub unpack_with_refs { my ($format, $s) = @_; my $initial_format = $format; my @r; while ($format =~ s/\s*(\w(\d*))(\*?)\s*//) { my ($sub_format, $nb, $many) = ($1, $2, $3); $many && $format and internal_error("bad * in the middle of format in $initial_format"); my $done = $many && !length($s); while (!$done) { my @l = unpack("$sub_format a*", $s); $s = pop @l; push @r, $nb ? \@l : @l; $done = !$many || !length($s); } } @r; } =item md5file(@files) Returns the MD5 signatures of @files in list context or signature of the first one in scalar context. =cut #- used in userdrake and mdkonline sub md5file { require Digest::MD5; my @md5 = map { my $sum; if (open(my $FILE, $_)) { binmode($FILE); $sum = Digest::MD5->new->addfile($FILE)->hexdigest; close($FILE); } $sum; } @_; return wantarray() ? @md5 : $md5[0]; } sub load_modules_from_base { my ($base) = @_; $base =~ s|::|/|g; my $base_file = $base . ".pm"; require $base_file; my ($inc_path) = substr($INC{$base_file}, 0, -length($base_file)); my @files = map { substr($_, length($inc_path)) } glob_($inc_path . $base . '/*.pm'); require $_ foreach @files; #- return the matching modules list map { local $_ = $_; s|/|::|g; s|\.pm$||g; $_ } @files; } sub get_alternatives { my ($name) = @_; my $dir = $::prefix . '/var/lib/rpm/alternatives'; my ($state, $main_link, @l) = chomp_(cat_("$dir/$name")) or return; my @slaves; while (@l && $l[0] ne '') { my ($name, $link) = splice(@l, 0, 2); push @slaves, { name => $name, link => $link }; } shift @l; #- empty line my @alternatives; while (@l && $l[0] ne '') { my ($file, $weight, @slave_files) = splice(@l, 0, 2 + @slaves); push @alternatives, { file => $file, weight => $weight, slave_files => \@slave_files }; } { name => $name, link => $main_link, state => $state, slaves => \@slaves, alternatives => \@alternatives }; } sub symlinkf_update_alternatives { my ($name, $wanted_file) = @_; run_program::rooted($::prefix, 'update-alternatives', '--set', $name, $wanted_file); } sub update_gnomekderc_no_create { my ($file, $category, %subst_) = @_; if (-e $file) { update_gnomekderc($file, $category, %subst_); } } =item cmp_kernel_versions($va, $vb) Compare two kernel versions =cut sub cmp_kernel_versions { my ($va, $vb) = @_; my $rel_a = $va =~ s/-(.*)$// && $1; my $rel_b = $vb =~ s/-(.*)$// && $1; ($va, $vb) = map { [ split /[.-]/ ] } $va, $vb; my $r = 0; mapn_ { $r ||= $_[0] <=> $_[1]; } $va, $vb; $r || $rel_a <=> $rel_b || $rel_a cmp $rel_b; } =back =cut 1;