Part: libblockdev Reference Manual for libblockdev 3.3.0.

## Part Part — plugin for operations with partition tables |

## Functions

gboolean | bd_part_init ()
void | bd_part_close ()
gboolean | bd_part_create_table ()
BDPartSpec * | bd_part_create_part ()
gboolean | bd_part_delete_part ()
gboolean | bd_part_resize_part ()
BDPartSpec ** | bd_part_get_disk_parts ()
BDPartSpec * | bd_part_get_part_spec ()
BDPartSpec * | bd_part_spec_copy ()
void | bd_part_spec_free ()
GType | bd_part_spec_get_type ()
const gchar * | bd_part_get_part_table_type_str ()
const gchar * | bd_part_get_type_str ()
BDPartSpec * | bd_part_get_best_free_region ()
BDPartSpec ** | bd_part_get_disk_free_regions ()
BDPartDiskSpec * | bd_part_get_disk_spec ()
BDPartSpec * | bd_part_get_part_by_pos ()
gboolean | bd_part_set_part_name ()
gboolean | bd_part_set_part_type ()
gboolean | bd_part_set_part_id ()
gboolean | bd_part_set_part_bootable ()
gboolean | bd_part_set_part_attributes ()
gboolean | bd_part_set_part_uuid ()
GQuark | bd_part_error_quark ()
gboolean | bd_part_is_tech_avail ()
BDPartDiskSpec * | bd_part_disk_spec_copy ()
void | bd_part_disk_spec_free ()

## Types and Values

#define | BD_PART_ERROR
#define | BD_PART_TYPE_SPEC
enum | BDPartAlign
| BDPartSpec
enum | BDPartType
enum | BDPartTypeReq
enum | BDPartError
enum | BDPartTableType
| BDPartDiskSpec
enum | BDPartTech
enum | BDPartTechMode

## Includes

    #include <part.h>

## Description

A plugin for operations with partition tables. Currently supported table (disk label) types are MBR and GPT. See the functions below to get an overview of which operations are supported. If there's anything missing, please don't hesitate to report it as this plugin (just like all the others) is subject to future development and enhancements.

This particular implementation of the part plugin uses libfdisk for manipulations of both the MBR and GPT disk label types.

## Functions

### bd_part_init ()

    gboolean
    bd_part_init (void);

Initializes the plugin. **This function is called automatically by the library's initialization functions.**

### bd_part_close ()

    void
    bd_part_close (void);

Cleans up after the plugin. **This function is called automatically by the library's functions that unload it.**

### bd_part_create_table ()

    gboolean
    bd_part_create_table (const gchar *disk,
                          BDPartTableType type,
                          gboolean ignore_existing,
                          GError **error);

#### Parameters

disk | path of the disk block device to create partition table on |
type | type of the partition table to create |
ignore_existing | whether to ignore/overwrite the existing table or not (reports an error if `FALSE` and there's some table on `disk` ) |
error | place to store error (if any). | [out][optional]

#### Returns

whether the partition table was successfully created or not

Tech category: `BD_PART_TECH_MODE_CREATE_TABLE` + the tech according to `type`

### bd_part_create_part ()

    BDPartSpec *
    bd_part_create_part (const gchar *disk,
                         BDPartTypeReq type,
                         guint64 start,
                         guint64 size,
                         BDPartAlign align,
                         GError **error);

#### Parameters

disk | disk to create partition on |
type | type of the partition to create (if `BD_PART_TYPE_REQ_NEXT`, the partition type will be determined automatically based on the existing partitions) |
start | where the partition should start (i.e. offset from the disk start) |
size | desired size of the partition (if 0, a max-sized partition is created) |
align | alignment to use for the partition |
error | place to store error (if any). | [out][optional]

#### Returns

specification of the created partition or `NULL` in case of error

NOTE: The resulting partition may start at a different position than given by `start` and can have different size than `size` due to alignment.

Tech category: `BD_PART_TECH_MODE_MODIFY_TABLE` + the tech according to the partition table type.

[transfer full]

### bd_part_delete_part ()

    gboolean
    bd_part_delete_part (const gchar *disk,
                         const gchar *part,
                         GError **error);

#### Parameters

disk | disk to remove the partition from |
part | partition to remove |
error | place to store error (if any). | [out][optional]

#### Returns

whether the `part` partition was successfully deleted from `disk`

Tech category: `BD_PART_TECH_MODE_MODIFY_TABLE` + the tech according to the partition table type

### bd_part_resize_part ()

    gboolean
    bd_part_resize_part (const gchar *disk,
                         const gchar *part,
                         guint64 size,
                         BDPartAlign align,
                         GError **error);

#### Parameters

disk | disk containing the partition |
part | partition to resize |
size | new partition size, 0 for maximal size |
align | alignment to use for the partition end |
error | place to store error (if any). | [out][optional]

#### Returns

whether the `part` partition was successfully resized on `disk` to `size`

NOTE: The resulting partition may be slightly bigger than requested due to alignment.

Tech category: `BD_PART_TECH_MODE_MODIFY_TABLE` + the tech according to the partition table type

### bd_part_get_disk_parts ()

    BDPartSpec **
    bd_part_get_disk_parts (const gchar *disk,
                            GError **error);

#### Parameters

disk | disk to get information about partitions for |
error | place to store error (if any). | [out][optional]

#### Returns

specs of the partitions from `disk` or `NULL` in case of error

Tech category: `BD_PART_TECH_MODE_QUERY_TABLE` + the tech according to the partition table type.

[transfer full][array zero-terminated=1]

### bd_part_get_part_spec ()

    BDPartSpec *
    bd_part_get_part_spec (const gchar *disk,
                           const gchar *part,
                           GError **error);

#### Parameters

disk | disk to remove the partition from |
part | partition to get spec for |
error | place to store error (if any). | [out][optional]

#### Returns

spec of the `part` partition from `disk` or `NULL` in case of error

Tech category: `BD_PART_TECH_MODE_QUERY_PART` + the tech according to the partition table type.

[transfer full]

### bd_part_spec_copy ()

    BDPartSpec *
    bd_part_spec_copy (BDPartSpec *data);

### bd_part_spec_free ()

    void
    bd_part_spec_free (BDPartSpec *data);

### bd_part_spec_get_type ()

    GType
    bd_part_spec_get_type ();

### bd_part_get_part_table_type_str ()

    const gchar *
    bd_part_get_part_table_type_str (BDPartTableType type,
                                     GError **error);

#### Parameters

type | table type to get string representation for |
error | place to store error (if any). | [out][optional]

#### Returns

string representation of `table_type`

Tech category: the tech according to `type` .

[transfer none]

### bd_part_get_type_str ()

    const gchar *
    bd_part_get_type_str (BDPartType type,
                          GError **error);

#### Parameters

type | type to get string representation for |
error | place to store error (if any). | [out][optional]

#### Returns

string representation of `type`

Tech category: always available.

[transfer none]

### bd_part_get_best_free_region ()

    BDPartSpec *
    bd_part_get_best_free_region (const gchar *disk,
                                  BDPartType type,
                                  guint64 size,
                                  GError **error);

#### Parameters

disk | disk to get the best free region for |
type | type of the partition that is planned to be added |
size | size of the partition to be added |
error | place to store error (if any). | [out][optional]

#### Returns

spec of the best free region on `disk` for a new partition of type `type` with the size of `size` or `NULL` if there is none such region or if there was an error (`error` gets populated)

Note: For the `type` `BD_PART_TYPE_NORMAL`, the smallest possible space that *is not* in an extended partition is found. For the `type` `BD_PART_TYPE_LOGICAL`, the smallest possible space that *is* in an extended partition is found. For `BD_PART_TYPE_EXTENDED`, the biggest possible space is found as long as there is no other extended partition (there can only be one).

Tech category: `BD_PART_TECH_MODE_QUERY_TABLE` + the tech according to the partition table type.

[transfer full]

### bd_part_get_disk_free_regions ()

    BDPartSpec **
    bd_part_get_disk_free_regions (const gchar *disk,
                                   GError **error);

#### Parameters

disk | disk to get free regions for |
error | place to store error (if any). | [out][optional]

#### Returns

specs of the free regions from `disk` or `NULL` in case of error

Tech category: `BD_PART_TECH_MODE_QUERY_TABLE` + the tech according to the partition table type.

[transfer full][array zero-terminated=1]

### bd_part_get_disk_spec ()

    BDPartDiskSpec *
    bd_part_get_disk_spec (const gchar *disk,
                           GError **error);

#### Parameters

disk | disk to get information about |
error | place to store error (if any). | [out][optional]

#### Returns

information about the given `disk` or `NULL` (in case of error)

Tech category: `BD_PART_TECH_MODE_QUERY_TABLE` + the tech according to the partition table type.

[transfer full]

### bd_part_get_part_by_pos ()

    BDPartSpec *
    bd_part_get_part_by_pos (const gchar *disk,
                             guint64 position,
                             GError **error);

#### Parameters

disk | disk to remove the partition from |
position | position (in bytes) determining the partition |
error | place to store error (if any). | [out][optional]

#### Returns

spec of the partition from `disk` spanning over the `position` or `NULL` if no such partition exists or in case of error (`error` is set)

Tech category: `BD_PART_TECH_MODE_QUERY_PART` + the tech according to the partition table type.

[transfer full]

### bd_part_set_part_name ()

    gboolean
    bd_part_set_part_name (const gchar *disk,
                           const gchar *part,
                           const gchar *name,
                           GError **error);

#### Parameters

disk | device the partition belongs to |
part | partition the name should be set for |
name | name to set |
error | place to store error (if any). | [out][optional]

#### Returns

whether the name was successfully set or not

Tech category: `BD_PART_TECH_GPT`-`BD_PART_TECH_MODE_MODIFY_PART`

### bd_part_set_part_type ()

    gboolean
    bd_part_set_part_type (const gchar *disk,
                           const gchar *part,
                           const gchar *type_guid,
                           GError **error);

#### Parameters

disk | device the partition belongs to |
part | partition the type should be set for |
type_guid | GUID of the type |
error | place to store error (if any). | [out][optional]

#### Returns

whether the `type_guid` type was successfully set for `part` or not

Tech category: `BD_PART_TECH_GPT`-`BD_PART_TECH_MODE_MODIFY_PART`

### bd_part_set_part_id ()

    gboolean
    bd_part_set_part_id (const gchar *disk,
                         const gchar *part,
                         const gchar *part_id,
                         GError **error);

#### Parameters

disk | device the partition belongs to |
part | partition the ID should be set for |
part_id | partition Id |
error | place to store error (if any). | [out][optional]

#### Returns

whether the `part_id` type was successfully set for `part` or not

Tech category: `BD_PART_TECH_MBR`-`BD_PART_TECH_MODE_MODIFY_PART`

### bd_part_set_part_bootable ()

    gboolean
    bd_part_set_part_bootable (const gchar *disk,
                               const gchar *part,
                               gboolean bootable,
                               GError **error);

#### Parameters

disk | device the partition belongs to |
part | partition the bootable flag should be set for |
bootable | whether to set or unset the bootable flag |
error | place to store error (if any). | [out][optional]

#### Returns

whether the `bootable` flag was successfully set for `part` or not

Tech category: `BD_PART_TECH_MBR`-`BD_PART_TECH_MODE_MODIFY_PART`

### bd_part_set_part_attributes ()

    gboolean
    bd_part_set_part_attributes (const gchar *disk,
                                 const gchar *part,
                                 guint64 attrs,
                                 GError **error);

#### Parameters

disk | device the partition belongs to |
part | partition the attributes should be set for |
attrs | GPT attributes to set on `part` |
error | place to store error (if any). | [out][optional]

#### Returns

whether the `attrs` GPT attributes were successfully set for `part` or not

Tech category: `BD_PART_TECH_GPT`-`BD_PART_TECH_MODE_MODIFY_PART`

### bd_part_set_part_uuid ()

    gboolean
    bd_part_set_part_uuid (const gchar *disk,
                           const gchar *part,
                           const gchar *uuid,
                           GError **error);

#### Parameters

disk | device the partition belongs to |
part | partition the UUID should be set for |
uuid | partition UUID to set |
error | place to store error (if any). | [out][optional]

#### Returns

whether the `uuid` type was successfully set for `part` or not

Tech category: `BD_PART_TECH_MODE_MODIFY_PART` + the tech according to the partition table type

### bd_part_error_quark ()

    GQuark
    bd_part_error_quark (void);

[skip]

### bd_part_is_tech_avail ()

    gboolean
    bd_part_is_tech_avail (BDPartTech tech,
                           guint64 mode,
                           GError **error);

#### Parameters

tech | the queried tech |
mode | a bit mask of queried modes of operation (BDPartTechMode) for `tech` |
error | place to store error (details about why the `tech` -`mode` combination is not available). | [out][optional]

#### Returns

whether the `tech` -`mode` combination is available -- supported by the plugin implementation and having all the runtime dependencies available

### bd_part_disk_spec_copy ()

    BDPartDiskSpec *
    bd_part_disk_spec_copy (BDPartDiskSpec *data);

### bd_part_disk_spec_free ()

    void
    bd_part_disk_spec_free (BDPartDiskSpec *data);

## Types and Values

### BD_PART_ERROR

    #define             BD_PART_ERROR

### BD_PART_TYPE_SPEC

    #define BD_PART_TYPE_SPEC (bd_part_spec_get_type ())

### enum BDPartAlign

#### Members

BD_PART_ALIGN_NONE |  |
BD_PART_ALIGN_MINIMAL |  |
BD_PART_ALIGN_OPTIMAL |  |

### BDPartSpec

    typedef struct {
        gchar *path;
        gchar *name;
        gchar *uuid;
        gchar *id;
        gchar *type_guid;
        guint64 type;
        guint64 start;
        guint64 size;
        gboolean bootable;
        guint64 attrs;
        gchar *type_name;
    } BDPartSpec;

#### Members

gchar *`path`; | path of the partition (block device) |
gchar *`name`; | name of the partition (for GPT partitions) |
gchar *`uuid`; | UUID of the partition (for GPT partitions) |
gchar *`id`; | id of the partition (for MSDOS partitions) |
gchar *`type_guid`; | GUID of the partition's type (GPT) |
guint64 `type`; | bit combination of partition's types (BDPartType) |
guint64 `start`; | start of the partition |
guint64 `size`; | size of the partition |
gboolean `bootable`; | whether the bootable flag is set or not (for MSDOS partitions) |
guint64 `attrs`; | partition GPT attributes |
gchar *`type_name`; | human readable representation of `type_guid` |

### enum BDPartType

#### Members

BD_PART_TYPE_NORMAL |  |
BD_PART_TYPE_LOGICAL |  |
BD_PART_TYPE_EXTENDED |  |
BD_PART_TYPE_FREESPACE |  |
BD_PART_TYPE_METADATA |  |
BD_PART_TYPE_PROTECTED |  |

### enum BDPartTypeReq

#### Members

BD_PART_TYPE_REQ_NORMAL |  |
BD_PART_TYPE_REQ_LOGICAL |  |
BD_PART_TYPE_REQ_EXTENDED |  |
BD_PART_TYPE_REQ_NEXT |  |

### enum BDPartError

#### Members

BD_PART_ERROR_TECH_UNAVAIL |  |
BD_PART_ERROR_FAIL |  |
BD_PART_ERROR_INVAL |  |
BD_PART_ERROR_EXISTS |  |

### enum BDPartTableType

#### Members

BD_PART_TABLE_MSDOS |  |
BD_PART_TABLE_GPT |  |
BD_PART_TABLE_UNDEF |  |

### BDPartDiskSpec

    typedef struct {
        gchar *path;
        BDPartTableType table_type;
        guint64 size;
        guint64 sector_size;
    } BDPartDiskSpec;

#### Members

gchar *`path`; | path of the disk (block device) |
BDPartTableType `table_type`; | type of the disk's partition table |
guint64 `size`; | size of the disk |
guint64 `sector_size`; | disk's sector size |

### enum BDPartTech

#### Members

BD_PART_TECH_MBR |  |
BD_PART_TECH_GPT |  |

### enum BDPartTechMode

#### Members

BD_PART_TECH_MODE_CREATE_TABLE |  |
BD_PART_TECH_MODE_MODIFY_TABLE |  |
BD_PART_TECH_MODE_QUERY_TABLE |  |
BD_PART_TECH_MODE_MODIFY_PART |  |
BD_PART_TECH_MODE_QUERY_PART |  |