Chip 2007 January, February, March & April/Chip-Cover-CD-2007-02.iso/boot/i386/root/usr/share/YaST2/include/bootloader/routines/i386.ycp

Text File | 2006-11-29 | 4.7 KB | 203 lines

/**
 * File:
 *      include/bootloader/routines/i386.ycp
 *
 * Module:
 *      Bootloader installation and configuration
 *
 * Summary:
 *      Functions for i386 architecture
 *
 * Authors:
 *      Jiri Srain <[e-mail]>
 *
 * $Id: i386.ycp 34177 2006-11-08 17:16:21Z odabrunz $
 *
 */
{

textdomain "bootloader";

// general MBR reading cache

/**
 * The last disk that was checked for the sequence
 */
string _old_mbr_disk = nil;

/**
 * Contents of the last read MBR
 */
string _old_mbr = nil;

// info about ThinkPad

/**
 * Does MBR contain special thinkpadd stuff?
 */
boolean _thinkpad_mbr = nil;

/**
 * The last disk that was checked for the sequence
 */
string _old_thinkpad_disk = nil;

// Info about keeping MBR contents

/**
 * Keep the MBR contents?
 */
boolean _keep_mbr = nil;

/**
 * Sequence specific for IBM ThinkPad laptops, see bug 86762
 */
string thinkpad_seq = "50e46124108ae0e461241038e074f8e2f458c332edb80103ba8000cd13c3be05068a04240cc0e802c3";

/**
 * Get the contents of the MBR of a disk
 * @param disk string the disk to be checked
 * @return strign the contents of the MBR of the disk in hexa form
 */
string GetMBRContents (string disk) {
    if (_old_mbr == nil || disk != _old_mbr_disk)
    {
    _old_mbr_disk = disk;
    map out = (map)SCR::Execute (.target.bash_output, sformat (
        "dd if=%1 bs=512 count=1 | od -v -t x1 -", disk));
    if (out["exit"]:0 != 0)
    {
        y2error ("Reading MBR contents failed");
        return nil;
    }
    string mbr = out["stdout"]:"";
    list<string> mbrl = splitstring (mbr, "\n");
    mbrl = maplist (string s, mbrl, {
        list<string> l = splitstring (s, " ");
        l[0] = "";
        return mergestring (l, "");
    });
    mbr = mergestring (mbrl, "");
    y2debug ("MBR contents: %1", mbr);
    _old_mbr = mbr;
    }
    return _old_mbr;
}

/**
 * Does MBR of the disk contain special IBM ThinkPad stuff?
 * @param disk string the disk to be checked
 * @return boolean true if it is MBR
 */
global boolean ThinkPadMBR (string disk) {
    if (_thinkpad_mbr == nil || disk != _old_thinkpad_disk)
    {
    _old_thinkpad_disk = disk;
    string mbr = GetMBRContents (disk);
    _thinkpad_mbr = issubstring (mbr, thinkpad_seq);
    }
    y2milestone ("MBR of %1 contains ThinkPad sequence: %2",
    disk, _thinkpad_mbr);
    return _thinkpad_mbr;

}

/**
 * Keep the MBR contents on the specified disk? Check whether the contents
 * should be kept because ot contains vendor-specific data
 * @param disk string the disk to be checked
 * @return boolean true to keep the contents
 */
global boolean KeepMBR (string disk) {
    if (ThinkPadMBR (disk))
    return true;
    return false;
}

/**
 * Add the partition holding firmware to bootloader?
 * @param disk string the disk to be checked
 * @return boolean true if firmware partition is to be added
 */
global boolean AddFirmwareToBootloader (string disk) {
    return ! ThinkPadMBR (disk);
}

/**
 * Display bootloader summary
 * @return a list of summary lines
 */
global list<string> i386Summary () {
    list<string> ret = Summary ();
    string order_sum = DiskOrderSummary ();
    if (order_sum != nil)
    ret = add (ret, order_sum);
    return ret;
}

/**
 * Propose the boot loader location for i386 (and similar) platform
 */
global void i386LocationProposal () {
    if (! was_proposed)
    {
    DetectDisks ();
    del_parts = getPartitionList (`deleted);
    // check whether edd is loaded; if not: load it
    string lsmod_command = "lsmod | grep edd";
    y2milestone ("Running command %1", lsmod_command);
    map lsmod_out = (map)SCR::Execute (.target.bash_output, lsmod_command);
    y2milestone ("Command output: %1", lsmod_out);
    boolean edd_loaded = lsmod_out["exit"]:0 == 0;
    if (! edd_loaded)
    {
        string command = "/sbin/modprobe edd";
        y2milestone ("Loading EDD module, running %1", command);
        map out = (map)SCR::Execute (.target.bash_output, command);
        y2milestone ("Command output: %1", out);
    }
    }

    // refresh device map
    if (device_mapping == nil
    || size (device_mapping) == 0)
    {
    ProposeDeviceMap ();
    }
    boolean disks_changed = RefreshDisks();
    if (disks_changed && ! Mode::autoinst ())
    {
    if (askLocationResetPopup (loader_device))
    {
        selected_location = nil;
        loader_device = nil;
        DetectDisks ();
    }
    }
}

/**
 * Do updates of MBR after the bootloader is installed
 * @return boolean true on success
 */
global boolean PostUpdateMBR () {
    boolean ret = true;
    if (ThinkPadMBR (mbrDisk))
    {
    if (loader_device != mbrDisk)
    {
        string command = sformat
        ("/usr/lib/YaST2/bin/tp_mbr %1", mbrDisk);
        y2milestone ("Running command %1", command);
        map out = (map)SCR::Execute (.target.bash_output, command);
        integer exit = out["exit"]:0;
        y2milestone ("Command output: %1", out);
        ret = ret && (0 == exit);
    }
    }

    return ret;
}

} // EOF