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Bootloader::Tools

NAME
PREFACE
SYNOPSIS
DESCRIPTION

NAME

Bootloader::Tools − set of high−level bootloader configuration functions

PREFACE

This package contains a set of high-level bootloader configuration functions

SYNOPSIS

"use Bootloader::Tools;"

"$mp_ref = Bootloader::Tools::ReadMountPoints ();"

"$part_ref = Bootloader::Tools::ReadPartitions ();"

"$numDM = Bootloader::Tools::DMRaidAvailable ();"

"$part_ref = Bootloader::Tools::ReadDMRaidPartitions ();"

"$part_ref = Bootloader::Tools::ReadDMRaidDisks ();"

"Bootloader::Tools::IsDMRaidSlave ($kernel_disk);"

"Bootloader::Tools::IsDMDevice($dev);"

"$md_ref = Bootloader::Tools::ReadRAID1Arrays ();"

"$loader = Bootloader::Tools::GetBootloader ();"

"$value = Bootloader::Tools::GetSysconfigValue ();"

"Bootloader::Tools::InitLibrary ();"

"Bootloader::Tools::CountImageSections ($image);"

"Bootloader::Tools::RemoveImageSections ($image);"

"Bootloader::Tools::GetSystemLanguage ();"

"Bootloader::Tools::GetDefaultSection ();"

"Bootloader::Tools::GetDefaultImage ();"

"Bootloader::Tools::GetDefaultInitrd ();"

"Bootloader::Tools::GetGlobals();"

"Bootloader::Tools::SetGlobals(@params);"

"Bootloader::Tools::GetSectionList(@selectors);"

"Bootloader::Tools::GetSection($name);"

"Bootloader::Tools::AddSection($name, @params);"

"Bootloader::Tools::RemoveSections($name);"

"Bootloader::Tools::AdjustSectionNameAppendix ($mode, $sect_ref_new, $sect_ref_old);"

"$exec_with_path = Bootloader::Tools::AddPathToExecutable($executable);"

"Bootloader::Tools::DeviceMapperActive ();"

DESCRIPTION

"$mp_ref = Bootloader::Tools::ReadMountPoints ();"

reads the information about mountpoints in the system. The returned data is needed to initialize the bootloader library properly.

See InitLibrary function for example.

"$part_ref = Bootloader::Tools::ReadPartitions ();"

reads the information about disk partitions. This data is needed to initialize the bootloader library properly.

See InitLibrary function for example.

"Bootloader::Tools::GetMultipath ();"

Gets multipath configuration. Return reference to hash map, empty if system doesn’t contain multipath.

"Bootloader::Tools::GetMultipath ();"

Gets multipath configuration. Return reference to hash map, empty if system doesn’t contain multipath.

"$numDM = Bootloader::Tools::DMRaidAvailable ();"

Tests wether DMRAID is available. Return 0 if no device, 1 if there are any.

"$part_ref = Bootloader::Tools::ReadDMRaidPartitions ();"

reads partitions belonging to a Devicemapper RAID device. needed to be able to put get the correct translation into Grub notation DMRaid Devices look like: <strange name>

DMRaid Partitions look like: <strange name>_part\d

"$part_ref = Bootloader::Tools::ReadDMRaidDisks ();"

returns a refenrence to a list of DMRaid devices

"Bootloader::Tools::IsDMRaidSlave ($kernel_disk);"

checks wether a kernel_device is part of a DMRAID returns 1 if yes, 0 if no

"Bootloader::Tools:IsDMDevice ($device);"

returns 1 if $device is a Devicemapper device, otherwise 0.

"$md_ref = Bootloader::Tools::ReadRAID1Arrays ();"

reads the information about disk MD RAID1 arrays. This data is needed to initialize the bootloader library properly.

"$loader = Bootloader::Tools::GetBootloader ();"

returns the used bootloader. Reads the value from sysconfig. Returns the string − bootloader type.

See InitLibrary function for example.

"$value = Bootloader::Tools::GetSysconfigValue ();"

returns specified option from the /etc/sysconfig/bootloader file or undef if variable is not set.

See AddSection for example

"Bootloader::Tools::InitLibrary ();"

initializes the bootloader configuration library. Fills its internal structures needed for it to run properly.

"Bootloader::Tools::CountImageSections ($image);"

counts sections in the bootolader menu reffering to the specified kernel.

EXAMPLE:

  Bootloader::Tools::InitLibrary();
  my $count = Bootloader::Tools::CountImageSections ("/boot/vmlinuz−2.6.11");
  print "Sections: $count\n";

"Bootloader::Tools::CountSections (@selections);"

# FIXME: add documentation

"Bootloader::Tools::UpdateBootloader ();"

Updates the bootloader settings meaning do whatever it takes for the actual bootloader to use the current configuration

"$lang = Bootloader::Tools::GetSystemLanguage ();"

Read the System Language from /etc/sysconfig/language:RC_LANG

EXAMPLE:
my $Lang; $Lang = Bootloader::Tools::GetSystemLanguage ();

setlocale(LC_MESSAGES, $Lang);

"%defaultSelection = Bootloader::Tools::GetDefaultSection ();"

Get the default section, returns a hash reference

EXAMPLE:
my %section; %section = Bootloader::Tools::GetDefaultSection ();
my $default_kernel = $section{"image"};

"Bootloader::Tools::GetDefaultImage ();"

Get the kernel name of the default section

EXAMPLE:
my $kernel; $kernel = Bootloader::Tools::GetDefaultImage ();

print("Default Kernel Name: $kernel\n");

"Bootloader::Tools::GetDefaultInitrd ();"

Get the initrd of the default section

EXAMPLE:
my $initrd; $initrd = Bootloader::Tools::GetDefaultInitrd ();

print("Default initrd Name: $initrd\n");

"Bootloader::Tools::GetGlobals();"
"Bootloader::Tools::SetGlobals(@params);"

# FIXME: Add documentation

"Bootloader::Tools::GetSectionList(@selectors);"

# FIXME: Add documentation

"Bootloader::Tools::GetSection($name);"

# FIXME: Add documentation

"Bootloader::Tools::GetFittingSection($name, $image, $type,
\@sections);"

Fing fitting section for given name and image type. If not find return undef.

"Bootloader::Tools::AddSection($name, @params);"

Add a new section (boot entry) to config file, e.g. to /boot/grub/menu.lst

EXAMPLE:

  my $opt_name = "LabelOfSection";
  my @params = (type   => $type,
                image  => $opt_image,
                initrd => $opt_initrd,
  );
  Bootloader::Tools::AddSection ($opt_name, @params);

"Bootloader::Tools::RemoveImageSections ($image);"

removes all sections in the bootloader menu referring to the specified kernel.

EXAMPLE:

  Bootloader::Tools::InitLibrary ();
  Bootloader::Tools::RemoveImageSections ("/boot/vmlinuz−2.6.11");
  Bootloader::Tools::UpdateBootloader();

"Bootloader::Tools::RemoveSections($name);"
"Bootloader::Tools::AdjustSectionNameAppendix ($mode, $sect_ref_new,
$sect_ref_old);"

Adds and respectively removes a potential appendix of a section name.

In case of mode "add", it adjusts labels which only differ in their corresponding flavors in the following way, e.g.:

SUSE Linux Enterprise Server 10 − 2.6.16.54−0.2.3 (default) and
SUSE Linux Enterprise Server 10 − 2.6.16.54−0.2.3 (smp)

Thus, the corresponding flavors will be appended in brackets.

In case of mode "remove", an appended flavor will be removed from the section label if the corresponding section is the only one left referring to a kernel with it’s specific version.

EXAMPLE:

  my $mode = "add";
  my $sect_ref_new = \%new_section;
  Bootloader::Tools::AdjustSectionNameAppendix ($mode, $sect_ref_new);
  or
  my $mode = "remove"
  my $sect_ref_new = \@section_naems_after_removal;
  my $sect_ref_old = \@section_names_before_removal;
  Bootloader::Tools::AdjustSectionNameAppendix ($mode, $sect_ref_new, $sect_ref_old);

"Bootloader::Tools::AddPathToExecutable ($executable);"

Prepends the corresponding (absolute) path to the given executable and returns the result. If not found in path, function returns undef.

EXAMPLE:

  my $executable = "dmsetup";
  my $exec_with_path = Bootloader::Tools::AddPathToExecutable ($executable);
  if (−e $exec_with_path) {
      print ("The desired executable is located here: $exec_with_path");
  }

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