diff options
Diffstat (limited to 'tools/drakx-in-chroot')
| -rwxr-xr-x | tools/drakx-in-chroot | 278 |
1 files changed, 278 insertions, 0 deletions
diff --git a/tools/drakx-in-chroot b/tools/drakx-in-chroot new file mode 100755 index 000000000..6565ec9e0 --- /dev/null +++ b/tools/drakx-in-chroot @@ -0,0 +1,278 @@ +#!/usr/bin/perl + +use MDK::Common; + +my $SLASH_LOCATION = '/tmp/drakx-in-chroot'; + +my $verbose = 0; +my $prefix_ROOTED = '/mnt'; +my $IMAGE_LOCATION_ROOTED = '/tmp/image'; +my $MEDIA_LOCATION_ROOTED = '/tmp/media'; +my $STAGE2_LOCATION_ROOTED = '/tmp/stage2'; +my $LOOP_MOUNT_POINT = "$SLASH_LOCATION/tmp/loop"; +my $LIVE_LOCATION_REL = 'install/stage2/live/'; +my $COMPRESSED_LOCATION_REL = 'install/stage2/'; +my $COMPRESSED_FILE_REL = $COMPRESSED_LOCATION_REL . 'mdkinst.sqfs'; +my $AUTO_INSTALL_ROOTED = '/tmp/auto_inst.cfg.pl'; +my $DEFCFG_ROOTED = '/tmp/defcfg.pl'; +my $RPMSRATE_ROOTED = '/tmp/rpmsrate'; +my $resolution = '1024x768'; +my ($disk_iso_repository, $repository_uri); + +@ARGV >= 2 or die "usage: drakx-in-chroot <root of distrib> <dir to install to> [options]\n +\nOptions specific to drakx-in-chroot: + --flang XX use XX locale + --disk-iso path of a distro + --resolution=XXXxYYYY (eg: --resolution=800x600)\n + --repository=<path> path of packages repository + --text text mode installer + --depth=XX set screen color depth + --stage2-update X,Y will mount --bind X on Y +"; + +(my $repository, my $dir, @ARGV) = @ARGV; +my ($wrapper); +foreach (@ARGV) { + if (/--resolution=(.*)/) { + $resolution = $1; + } elsif (/--disk-iso=(.*)/) { + $disk_iso_repository = $1; + } elsif (/--repository=(.*)/) { + $repository_uri = $1; + } elsif (/--gdb/) { + $wrapper = "gdb -q --args"; + } elsif (/--strace/) { + $wrapper = "strace -e file $ENV{STRACE_OPTIONS}"; + } elsif (/--depth=(.*)/) { + $resolution .= "x$1"; + } +} +my ($repository_without_arch, $repository_arch) = basename($repository) eq arch() ? (dirname($repository), '/' . arch()) : ($repository, ''); +my $STAGE2_LOCATION = $SLASH_LOCATION . $STAGE2_LOCATION_ROOTED; + +my $sudo; +if ($>) { + $sudo = "sudo"; + $ENV{PATH} = "/sbin:/usr/sbin:$ENV{PATH}"; +} + +my @mounts; +my $_b = before_leaving { sys("$sudo umount $_") foreach reverse @mounts }; + +undef $ENV{TMPDIR}; # prevent packdrake faillure on creating temporary files + +if (-d $SLASH_LOCATION) { + umount_all(1) == 0 or exit(1); + sys("$sudo rm -rf $SLASH_LOCATION/var/lib/rpm $SLASH_LOCATION/dev/mapper"); + rm_rf($SLASH_LOCATION); +} + +mkdir_p("$SLASH_LOCATION$_") foreach '/dev', '/etc', '/var', '/proc', '/sys', '/run', $STAGE2_LOCATION_ROOTED, $MEDIA_LOCATION_ROOTED, $prefix_ROOTED; + +sys("$sudo rm -rf $dir") if $ENV{CLEAN}; +-e $dir or sys("$sudo mkdir -p $dir"); + +copy_auto_install_files(); + +my $remote_repository = $repository =~ m!^(ftp|http)://! && $1; +if ($remote_repository) { + my $local_mdkinst = "$SLASH_LOCATION/tmp/mdkinst.sqfs"; + sys("curl --silent -o $local_mdkinst $repository/$COMPRESSED_FILE_REL"); + mount_mdkinst($local_mdkinst); +} elsif (-d "$repository/$LIVE_LOCATION_REL") { + mount("$repository/$LIVE_LOCATION_REL", $STAGE2_LOCATION, "-o bind"); +} elsif (-e "$repository/$COMPRESSED_FILE_REL") { + mount_mdkinst("$repository/$COMPRESSED_FILE_REL"); +} + +mount($dir, "$SLASH_LOCATION$prefix_ROOTED", "-o bind"); +$repository_uri ||= $repository_without_arch if !$remote_repository; +mount($repository_uri, "$SLASH_LOCATION$MEDIA_LOCATION_ROOTED", "-o bind") if $repository_uri; + +mount('/dev', "$SLASH_LOCATION/dev", " --bind -o ro"); +mount('none', "$SLASH_LOCATION/proc", "-t proc"); +mount('none', "$SLASH_LOCATION/sys", "-t sysfs"); +mount('none', "$SLASH_LOCATION/sys/kernel/debug", "-t debugfs"); +mount('none', "$SLASH_LOCATION/run", "-t tmpfs"); + +# - Ensure we mount the udev run dir for various extra metadata from udevadm +# - If dracut has been used (and thus udev has yummy metadata) make sure +# drakx knows about it when running in the chroot +# - Also speedup blkid by using its cache +foreach my $dir (qw(initramfs udev blkid)) { + next if !-d "/run/$dir"; + mkdir_p("$SLASH_LOCATION/run/$dir"); + mount("/run/$dir", "$SLASH_LOCATION/run/$dir", "-o bind"); +} + +if ($disk_iso_repository) { + my $repository_arch = $repository_arch || 'i586'; + mkdir_p($LOOP_MOUNT_POINT); + mount($disk_iso_repository, $LOOP_MOUNT_POINT, "-o loop,ro"); + symlinkf('loop/' . $repository_arch, "$SLASH_LOCATION$IMAGE_LOCATION_ROOTED"); # FIXME: arch() +} + +symlinkf('media' . $repository_arch, "$SLASH_LOCATION$IMAGE_LOCATION_ROOTED"); +create_initial_symlinks(); + +apply_stage2_updates(); + +output("$SLASH_LOCATION/etc/hosts", "127.0.0.1 localhost\n") if ! -e "$SLASH_LOCATION/etc/hosts"; + +#- in the chroot, we have no way to know which device corresponds to the "/" partition. +#- so helping it by giving the device which provide major/minor information +mkdir_p("$dir/dev"); +eval { cp_af($_, "$dir$_") } foreach qw(/dev/root); + +#- if the DISPLAY is remote, we may need to resolve the name: +eval { cp_af('/etc/resolv.conf', "$SLASH_LOCATION/etc/resolv.conf") }; + +{ + chomp(my $kernel_version = `uname -r`); + my $dir = "/modules/$kernel_version"; + mkdir_p("$SLASH_LOCATION$dir"); + output_p("$SLASH_LOCATION$dir" . $_, "\n") foreach "/lib/$dir/modules.dep", "/lib/$dir/modules.alias"; +} + +my $Xnest_pid; +if (!-f ($SLASH_LOCATION . $AUTO_INSTALL_ROOTED) && join('', @ARGV) !~ /--text/) { + my $Xnest_bin = find { whereis_binary($_) } 'Xephyr', 'Xnest' or die "Xephyr not found! Please install x11-server-xephyr!\n"; + my $DISPLAY = ':8'; + $Xnest_pid = fork(); + if (!$Xnest_pid) { + exec $Xnest_bin, $DISPLAY, '-ac', ($Xnest_bin eq 'Xephyr' ? '-screen' : '-geometry'), $resolution or die "Xnest failed\n"; + } + $ENV{DISPLAY} = $DISPLAY; +} + +if (my $pid = fork()) { + waitpid $pid, 0; + umount_all() == 0 or warn "umounting failed\n"; + $Xnest_pid and kill 15, $Xnest_pid; +} else { + $ENV{TERM} = 'linux'; # we only have terminfo for terminal "linux" + $ENV{HOME} = '/'; + # to kept sync with mdk-stage1/init.c::env: + $ENV{LD_LIBRARY_PATH}='/lib:/usr/lib:/mnt/lib:/mnt/usr/lib:/lib64:/usr/lib64:/mnt/lib64:/mnt/usr/lib64'; + if ($remote_repository) { + $ENV{URLPREFIX} = $repository; + } + my $cmd = join(' ', "/usr/bin/runinstall2 --local_install", + if_($disk_iso_repository, "--method disk-iso"), + if_($remote_repository, "--method $remote_repository"), + @ARGV); + if ($wrapper) { + warn qq(GDB USAGE +Beware that debug info won't be found so on segfault +just generate a core dump with "gcore" and then +analyze it offline. +Thus you sessions will look like: +(gdb) run +(gdb) gcore +(gdb) exit +); + } + exec "$sudo $wrapper chroot $SLASH_LOCATION $cmd" or die "exec $cmd in $SLASH_LOCATION failed\n"; +} + +sub system_verbose { warn join(' ', @_), "\n" if $verbose; system(@_) } +sub sys { &system_verbose; $? and die qq(running "@_" failed: $?\n) } + +sub mount_mdkinst { + my ($mdkinst) = @_; + mount($mdkinst, $STAGE2_LOCATION, "-t squashfs -o loop,ro"); +} +sub create_initial_symlinks() { + foreach (cat_or_die("$STAGE2_LOCATION/usr/share/symlinks")) { + my ($from, $to_) = split; + my $to = $SLASH_LOCATION . ($to_ || $from); + $from = "$STAGE2_LOCATION_ROOTED$from" if !$to_; + if (! -l $to) { + symlink $from, $to or die "symlinking $to failed\n"; + } + } + my $from = "$STAGE2_LOCATION_ROOTED/usr"; + my $to = "$SLASH_LOCATION/usr"; + symlink $from, $to or die "symlinking $to failed\n"; + foreach ('bin', 'sbin', 'lib', 'lib64') { + $from = "usr/$_"; + $to = "$SLASH_LOCATION/$_"; + symlink $from, $to or die "symlinking $to failed\n"; + } +} + +sub mount { + my ($from, $mntpt, @opts) = @_; + push @mounts, $mntpt; + sys("$sudo mount $from $mntpt " . join(' ', @opts)); +} + +sub umount_all { + my ($b_umount_dev_too) = @_; + my $err; + clean_stage2_updates(); + my @procs = (qw(/proc /sys/kernel/debug /sys /run/udev /run/blkid /run/initramfs /run)); + # special case for !draklive case (else a 2nd run would fail): + if ($b_umount_dev_too && cat_('/proc/mounts') =~ m! $SLASH_LOCATION/dev !) { + system_verbose "$sudo umount $SLASH_LOCATION/dev" and rm_rf("$SLASH_LOCATION/dev"); + } + foreach ((map { "$prefix_ROOTED$_" } @procs, '/dev', ''), @procs, $STAGE2_LOCATION_ROOTED, $LOOP_MOUNT_POINT, $MEDIA_LOCATION_ROOTED, $IMAGE_LOCATION_ROOTED) { + my $dir = "$SLASH_LOCATION$_"; + rmdir $dir; + if (-d $dir) { + if (m!/sys/kernel/debug! || begins_with($_, $prefix_ROOTED)) { + system_verbose "$sudo umount $dir 2>/dev/null"; + next; + } + system_verbose "$sudo umount $dir"; + } + rmdir $dir; + if (-d $dir) { + warn "$dir is busy\n"; + $err++; + } + } + if (my @remaining = cat_('/proc/mounts') =~ m!($SLASH_LOCATION/mnt/\S+)!g) { + warn "umount those mount points first: ", join(' ', @remaining), "\n"; + $err++; + } + $err; +} + +sub copy_auto_install_files() { + my ($opt); + each_index { + if ($opt eq 'auto_install' && -f $_) { + cp_f($_, $SLASH_LOCATION . $AUTO_INSTALL_ROOTED); + $_ = $AUTO_INSTALL_ROOTED; + } elsif ($opt eq 'defcfg' && -f $_) { + cp_f($_, $SLASH_LOCATION . $DEFCFG_ROOTED); + $_ = $DEFCFG_ROOTED; + } elsif ($opt eq 'rpmsrate' && -f $_) { + cp_f($_, $SLASH_LOCATION . $RPMSRATE_ROOTED); + } + undef $opt; + /^--?(.*)/ and $opt = $1; + } @ARGV; +} + +my @stage2_updates; +sub apply_stage2_updates() { + each_index { + if ($_ eq '--stage2-update') { + my $file = $ARGV[$::i+1]; + my $dest = $ARGV[$::i+2]; + if (-f $file && $dest) { + undef $_; + undef $ARGV[$::i+1]; + undef $ARGV[$::i+2]; + push @stage2_updates, $dest; + mount($file, "$STAGE2_LOCATION/$dest", " --bind"); + } + } + } @ARGV; +} + +sub clean_stage2_updates() { + sys("$sudo umount $STAGE2_LOCATION/$_") foreach @stage2_updates; +} |