le_update_interface.h File Reference

#include "legato.h"
#include "le_limit_interface.h"

Go to the source code of this file.

Typedefs

typedef struct le_update_ProgressHandler * le_update_ProgressHandlerRef_t
 
typedef void(* le_update_ProgressHandlerFunc_t) (le_update_State_t updateState, uint32_t percentDone, void *contextPtr)
 

Enumerations

enum  le_update_State_t { LE_UPDATE_STATE_UNPACKING = 0, LE_UPDATE_STATE_APPLYING = 1, LE_UPDATE_STATE_SUCCESS = 2, LE_UPDATE_STATE_FAILED = 3 }
 
enum  le_update_ErrorCode_t { LE_UPDATE_ERR_NONE = 0, LE_UPDATE_ERR_BAD_PACKAGE = 1, LE_UPDATE_ERR_INTERNAL_ERROR = 2, LE_UPDATE_ERR_SECURITY_FAILURE = 3 }
 

Functions

void le_update_ConnectService (void)
 
le_result_t le_update_TryConnectService (void)
 
void le_update_DisconnectService (void)
 
le_update_ProgressHandlerRef_t le_update_AddProgressHandler (le_update_ProgressHandlerFunc_t handlerPtr, void *contextPtr)
 
void le_update_RemoveProgressHandler (le_update_ProgressHandlerRef_t addHandlerRef)
 
le_result_t le_update_Start (int fd)
 
void le_update_End (void)
 
le_update_ErrorCode_t le_update_GetErrorCode (void)
 
int32_t le_update_GetCurrentSysIndex (void)
 
le_result_t le_update_GetSystemHash (int32_t systemIndex, char *hashStr, size_t hashStrNumElements)
 
int32_t le_update_GetPreviousSystemIndex (int32_t systemIndex)
 

Detailed Description

Legato Software Update include file.

Typedef Documentation

typedef void(* le_update_ProgressHandlerFunc_t) (le_update_State_t updateState, uint32_t percentDone, void *contextPtr)

The client callback function (handler) passed to le_update_Start() must look like this.

Parameters
updateStateCurrent state of update.
percentDonePercent done for current state. For example, in state UNPACKING, a percentDone of 80 means that 80% of the update data has been unpacked.
contextPtr
typedef struct le_update_ProgressHandler* le_update_ProgressHandlerRef_t

Reference type used by Add/Remove functions for EVENT 'le_update_Progress'

Enumeration Type Documentation

Error code used to provide diagnostic information after a failed update.

Note
Additional information may also be available in the target device's system log.
Enumerator
LE_UPDATE_ERR_NONE 

No error.

LE_UPDATE_ERR_BAD_PACKAGE 

Encountered bad update package. Check logs.

LE_UPDATE_ERR_INTERNAL_ERROR 

Something failed while doing update. Check logs.

LE_UPDATE_ERR_SECURITY_FAILURE 

Error while doing security check of the package.

Different states in the update state machine. The state machine is maintained to track the update task underway.

Example: for successful installation task, state transitions look like:

    --> UNPACKING --> APPLYING --> SUCCESS.
            |            |
            +------------+-------> FAILED.
Enumerator
LE_UPDATE_STATE_UNPACKING 

Unpacking update data.

LE_UPDATE_STATE_APPLYING 

Applying update(i.e. installation/removal operation going on).

LE_UPDATE_STATE_SUCCESS 

Successfully completed all update task.

LE_UPDATE_STATE_FAILED 

Update failed due to some error or deletion request.

Function Documentation

le_update_ProgressHandlerRef_t le_update_AddProgressHandler ( le_update_ProgressHandlerFunc_t  handlerPtr,
void *  contextPtr 
)

Add handler function for EVENT 'le_update_Progress'

Register for notification of the progress of a given update.

Parameters
[in]handlerPtr
[in]contextPtr
void le_update_ConnectService ( void  )

Connect the current client thread to the service providing this API. Block until the service is available.

For each thread that wants to use this API, either ConnectService or TryConnectService must be called before any other functions in this API. Normally, ConnectService is automatically called for the main thread, but not for any other thread. For details, see Client-specific Functions.

This function is created automatically.

void le_update_DisconnectService ( void  )

Disconnect the current client thread from the service providing this API.

Normally, this function doesn't need to be called. After this function is called, there's no longer a connection to the service, and the functions in this API can't be used. For details, see Client-specific Functions.

This function is created automatically.

void le_update_End ( void  )

Ends an update session. If the update isn't finished yet, cancels it.

int32_t le_update_GetCurrentSysIndex ( void  )

Get the index of the currently running system.

Returns
The index of the running system.
le_update_ErrorCode_t le_update_GetErrorCode ( void  )

Function to get error code when update fails.

Returns
  • Error code of encountered error.
  • ERR_NONE if update is in any other state.
int32_t le_update_GetPreviousSystemIndex ( int32_t  systemIndex)

Get the index for the previous system in the chain, using the current system as a starting point.

Returns
The index to the system that's previous to the given system. -1 is returned if the previous system was not found.
Parameters
[in]systemIndexGet the system that's older than this system.
le_result_t le_update_GetSystemHash ( int32_t  systemIndex,
char *  hashStr,
size_t  hashStrNumElements 
)

Gets the hash ID for a given system.

Returns
  • LE_OK if no problems are encountered.
  • LE_NOT_FOUND if the given index does not correspond to an available system.
  • LE_OVERFLOW if the supplied buffer is too small.
  • LE_FORMAT_ERROR if there are problems reading the hash for the system.
Parameters
[in]systemIndexThe system to read the hash for.
[out]hashStrBuffer to hold the system hash string.
[in]hashStrNumElements
void le_update_RemoveProgressHandler ( le_update_ProgressHandlerRef_t  addHandlerRef)

Remove handler function for EVENT 'le_update_Progress'

Parameters
[in]addHandlerRef
le_result_t le_update_Start ( int  fd)

Starts an update.

Progress is reported via the progress handler callback.

Returns
  • LE_OK if accepted.
  • LE_BUSY if another update is in progress.
  • LE_UNAVAILABLE if the system is still in "probation" (not marked "good" yet).
Parameters
[in]fdOpen file descriptor from which the update can be read.
le_result_t le_update_TryConnectService ( void  )

Try to connect the current client thread to the service providing this API. Return with an error if the service is not available.

For each thread that wants to use this API, either ConnectService or TryConnectService must be called before any other functions in this API. Normally, ConnectService is automatically called for the main thread, but not for any other thread. For details, see Client-specific Functions.

This function is created automatically.

Returns
  • LE_OK if the client connected successfully to the service.
  • LE_UNAVAILABLE if the server is not currently offering the service to which the client is bound.
  • LE_NOT_PERMITTED if the client interface is not bound to any service (doesn't have a binding).
  • LE_COMM_ERROR if the Service Directory cannot be reached.