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# Copyright (C) 2005 Mandriva
# Olivier Blin <oblin@mandriva.com>
# Copyright (C) 2017-2018 Mageia
# Martin Whitaker <mageia@martin-whitaker.me.uk>
#
# 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, 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, write to the Free Software Foundation,
# Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1335, USA.
# SYNOPSIS
# --------
# This package provides miscellaneous helper functions.
package MGA::DrakISO::Utils;
use strict;
use MDK::Common;
use common;
use fs;
use IPC::Open3;
use IO::Select;
use Exporter;
our @ISA = qw(Exporter);
our @EXPORT = qw($sudo directory_usage glob__ run_ run_as_root run_in_root copy_or_link
mk_dev_null rm_dev_null mount mount_system_fs umount_all_in_root);
our $sudo = $> ? 'sudo' : '';
sub directory_usage {
my ($dir, $o_apparent) = @_;
my $apparent = $o_apparent && "--apparent-size";
first(split /\s/, `$sudo du -s -B 1 $apparent $dir`);
}
#- expand only if the pattern contains '*'
#- and matches dot characters (like shell dotglob)
sub glob__ {
my ($pattern) = @_;
$pattern =~ /\*/ ? glob_($pattern) : $pattern;
}
sub run_ {
my @cmd = @_;
print "@cmd\n" if $::verbose > 2;
system(@cmd) == 0;
}
sub run_as_root {
my @cmd = @_;
if (@cmd > 1) {
unshift @cmd, $sudo if $sudo;
} else {
@cmd[0] = join(' ', $sudo, @cmd[0]);
}
run_(@cmd);
}
sub run_in_root {
my ($root, $arch, @cmd) = @_;
if (@cmd > 1) {
unshift @cmd, ( 'chroot', $root );
unshift @cmd, ( 'setarch', $arch ) if $arch;
unshift @cmd, $sudo if $sudo;
} else {
@cmd[0] = join(' ', $sudo, if_($arch, 'setarch', $arch), 'chroot', $root, @cmd[0]);
}
print "@cmd\n" if $::verbose > 2;
local %ENV = %ENV;
$ENV{LC_ALL} = 'C';
system(@cmd) == 0;
}
sub device_allocate_file {
my ($device, $size) = @_;
run_('dd', "of=$device", 'count=0', 'bs=1', "seek=" . removeXiBSuffix($size));
}
#- format $device as type $type
# FIXME: use fs::format
sub device_mkfs {
my ($device, $type, $o_label, $o_inode_size) = @_;
if ($type eq 'vfat') {
run_('mkfs.vfat', if_(defined $o_label, '-n', $o_label), $device);
} elsif (member($type, 'ext2', 'ext3', 'ext4')) {
run_("mkfs.$type", "-m", 0,
if_(defined $o_label, '-L', $o_label),
if_($o_inode_size, '-I', $o_inode_size),
if_(!-b $device, '-F'),
$device);
} elsif ($type eq 'swap') {
run_('mkswap', if_(defined $o_label, '-L', $o_label), $device);
} else {
die "ERROR: unable to mkfs for unsupported media type $type\n";
}
}
sub copy_or_link {
my ($src_file, $dst_file) = @_;
# TODO: support remote sources.
mkdir_p(dirname($dst_file));
symlinkf($src_file, $dst_file)
or die "ERROR: couldn't link $src_file to $dst_file\n";
}
sub mk_dev_null {
my ($root) = @_;
$root or die;
return if -e $root . '/dev/null';
run_as_root('mkdir', '-p', $root . '/dev');
run_as_root('cp', '-a', '/dev/null', $root . '/dev');
}
sub rm_dev_null {
my ($root) = @_;
$root or die;
run_as_root('rm', $root . '/dev/null') if -e $root . '/dev/null';
}
sub mount {
my ($dst, $src, @o_options) = @_;
mkdir_p($dst);
run_as_root('mount', @o_options, $src, $dst)
or die "ERROR: failed to mount $src on $dst\n";
}
sub mount_system_fs {
my ($root) = @_;
$root or die;
mount($root . '/dev', '/dev', '--bind', '-o', 'ro');
mount($root . '/proc', 'none', '-t', 'proc');
mount($root . '/sys', 'none', '-t', 'sysfs');
mount($root . '/run', 'none', '-t', 'tmpfs');
}
sub umount_all_in_root {
my ($root) = @_;
$root or die;
$root = Cwd::abs_path($root);
my @mounts = grep { $_ =~ $root } split("\n", cat_('/proc/mounts'));
foreach (reverse(@mounts)) {
my @field = split(' ' , $_);
run_as_root('umount', $field[1]);
}
}
1;
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