NAME

       globus_ftp_client_plugins - Plugins

        - Plugin API.

SYNOPSIS

   Modules
       Debugging Plugin
           Debugging Plugin.
       Performance Marker Plugin
           Performance Marker Plugin.
       Restart Marker Plugin
           Restart Marker Plugin.
       Restart Plugin
           Restart Plugin.
       Netlogger Throughput Plugin
           Netlogger Throughput Plugin.
       Throughput Performance Plugin
           Throughput Performance Plugin.

   Data Structures
       struct globus_i_ftp_client_plugin_t
           FTP Client Plugin.

   Typedefs
       typedef struct globus_i_ftp_client_plugin_t * globus_ftp_client_plugin_t
           FTP Client plugin.
       typedef globus_ftp_client_plugin_t *(* globus_ftp_client_plugin_copy_t)
           (globus_ftp_client_plugin_t *plugin_template, void *plugin_specific)
       typedef void(* globus_ftp_client_plugin_destroy_t) (globus_ftp_client_plugin_t *plugin,
           void *plugin_specific)
       typedef void(* globus_ftp_client_plugin_connect_t) (globus_ftp_client_plugin_t *plugin,
           void *plugin_specific, globus_ftp_client_handle_t *handle, const char *url)
       typedef void(* globus_ftp_client_plugin_authenticate_t) (globus_ftp_client_plugin_t
           *plugin, void *plugin_specific, globus_ftp_client_handle_t *handle, const char *url,
           const globus_ftp_control_auth_info_t *auth_info)
       typedef void(* globus_ftp_client_plugin_chmod_t) (globus_ftp_client_plugin_t *plugin, void
           *plugin_specific, globus_ftp_client_handle_t *handle, const char *url, int mode, const
           globus_ftp_client_operationattr_t *attr, globus_bool_t restart)
       typedef void(* globus_ftp_client_plugin_chgrp_t) (globus_ftp_client_plugin_t *plugin, void
           *plugin_specific, globus_ftp_client_handle_t *handle, const char *url, const char
           *group, const globus_ftp_client_operationattr_t *attr, globus_bool_t restart)
       typedef void(* globus_ftp_client_plugin_utime_t) (globus_ftp_client_plugin_t *plugin, void
           *plugin_specific, globus_ftp_client_handle_t *handle, const char *url, const struct tm
           *utime_time, const globus_ftp_client_operationattr_t *attr, globus_bool_t restart)
       typedef void(* globus_ftp_client_plugin_symlink_t) (globus_ftp_client_plugin_t *plugin,
           void *plugin_specific, globus_ftp_client_handle_t *handle, const char *url, const char
           *link_url, const globus_ftp_client_operationattr_t *attr, globus_bool_t restart)
       typedef void(* globus_ftp_client_plugin_cksm_t) (globus_ftp_client_plugin_t *plugin, void
           *plugin_specific, globus_ftp_client_handle_t *handle, const char *url, globus_off_t
           offset, globus_off_t length, const char *algorithm, const
           globus_ftp_client_operationattr_t *attr, globus_bool_t restart)
       typedef void(* globus_ftp_client_plugin_delete_t) (globus_ftp_client_plugin_t *plugin,
           void *plugin_specific, globus_ftp_client_handle_t *handle, const char *url, const
           globus_ftp_client_operationattr_t *attr, globus_bool_t restart)
       typedef void(* globus_ftp_client_plugin_feat_t) (globus_ftp_client_plugin_t *plugin, void
           *plugin_specific, globus_ftp_client_handle_t *handle, const char *url, const
           globus_ftp_client_operationattr_t *attr, globus_bool_t restart)
       typedef void(* globus_ftp_client_plugin_mkdir_t) (globus_ftp_client_plugin_t *plugin, void
           *plugin_specific, globus_ftp_client_handle_t *handle, const char *url, const
           globus_ftp_client_operationattr_t *attr, globus_bool_t restart)
       typedef void(* globus_ftp_client_plugin_rmdir_t) (globus_ftp_client_plugin_t *plugin, void
           *plugin_specific, globus_ftp_client_handle_t *handle, const char *url, const
           globus_ftp_client_operationattr_t *attr, globus_bool_t restart)
       typedef void(* globus_ftp_client_plugin_list_t) (globus_ftp_client_plugin_t *plugin, void
           *plugin_specific, globus_ftp_client_handle_t *handle, const char *url, const
           globus_ftp_client_operationattr_t *attr, globus_bool_t restart)
       typedef void(* globus_ftp_client_plugin_verbose_list_t) (globus_ftp_client_plugin_t
           *plugin, void *plugin_specific, globus_ftp_client_handle_t *handle, const char *url,
           const globus_ftp_client_operationattr_t *attr, globus_bool_t restart)
       typedef void(* globus_ftp_client_plugin_machine_list_t) (globus_ftp_client_plugin_t
           *plugin, void *plugin_specific, globus_ftp_client_handle_t *handle, const char *url,
           const globus_ftp_client_operationattr_t *attr, globus_bool_t restart)
       typedef void(* globus_ftp_client_plugin_recursive_list_t) (globus_ftp_client_plugin_t
           *plugin, void *plugin_specific, globus_ftp_client_handle_t *handle, const char *url,
           const globus_ftp_client_operationattr_t *attr, globus_bool_t restart)
       typedef void(* globus_ftp_client_plugin_mlst_t) (globus_ftp_client_plugin_t *plugin, void
           *plugin_specific, globus_ftp_client_handle_t *handle, const char *url, const
           globus_ftp_client_operationattr_t *attr, globus_bool_t restart)
       typedef void(* globus_ftp_client_plugin_stat_t) (globus_ftp_client_plugin_t *plugin, void
           *plugin_specific, globus_ftp_client_handle_t *handle, const char *url, const
           globus_ftp_client_operationattr_t *attr, globus_bool_t restart)
       typedef void(* globus_ftp_client_plugin_move_t) (globus_ftp_client_plugin_t *plugin, void
           *plugin_specific, globus_ftp_client_handle_t *handle, const char *source_url, const
           char *dest_url, const globus_ftp_client_operationattr_t *attr, globus_bool_t restart)
       typedef void(* globus_ftp_client_plugin_get_t) (globus_ftp_client_plugin_t *plugin, void
           *plugin_specific, globus_ftp_client_handle_t *handle, const char *url, const
           globus_ftp_client_operationattr_t *attr, globus_bool_t restart)
       typedef void(* globus_ftp_client_plugin_put_t) (globus_ftp_client_plugin_t *plugin, void
           *plugin_specific, globus_ftp_client_handle_t *handle, const char *url, const
           globus_ftp_client_operationattr_t *attr, globus_bool_t restart)
       typedef void(* globus_ftp_client_plugin_third_party_transfer_t)
           (globus_ftp_client_plugin_t *plugin, void *plugin_specific, globus_ftp_client_handle_t
           *handle, const char *source_url, const globus_ftp_client_operationattr_t *source_attr,
           const char *dest_url, const globus_ftp_client_operationattr_t *dest_attr,
           globus_bool_t restart)
       typedef void(* globus_ftp_client_plugin_modification_time_t) (globus_ftp_client_plugin_t
           *plugin, void *plugin_specific, globus_ftp_client_handle_t *handle, const char *url,
           const globus_ftp_client_operationattr_t *attr, globus_bool_t restart)
       typedef void(* globus_ftp_client_plugin_size_t) (globus_ftp_client_plugin_t *plugin, void
           *plugin_specific, globus_ftp_client_handle_t *handle, const char *url, const
           globus_ftp_client_operationattr_t *attr, globus_bool_t restart)
       typedef void(* globus_ftp_client_plugin_abort_t) (globus_ftp_client_plugin_t *plugin, void
           *plugin_specific, globus_ftp_client_handle_t *handle)
       typedef void(* globus_ftp_client_plugin_read_t) (globus_ftp_client_plugin_t *plugin, void
           *plugin_specific, globus_ftp_client_handle_t *handle, const globus_byte_t *buffer,
           globus_size_t buffer_length)
       typedef void(* globus_ftp_client_plugin_write_t) (globus_ftp_client_plugin_t *plugin, void
           *plugin_specific, globus_ftp_client_handle_t *handle, const globus_byte_t *buffer,
           globus_size_t buffer_length, globus_off_t offset, globus_bool_t eof)
       typedef void(* globus_ftp_client_plugin_data_t) (globus_ftp_client_plugin_t *plugin, void
           *plugin_specific, globus_ftp_client_handle_t *handle, globus_object_t *error, const
           globus_byte_t *buffer, globus_size_t length, globus_off_t offset, globus_bool_t eof)
       typedef void(* globus_ftp_client_plugin_command_t) (globus_ftp_client_plugin_t *plugin,
           void *plugin_specific, globus_ftp_client_handle_t *handle, const char *url, const char
           *command)
       typedef void(* globus_ftp_client_plugin_response_t) (globus_ftp_client_plugin_t *plugin,
           void *plugin_specific, globus_ftp_client_handle_t *handle, const char *url,
           globus_object_t *error, const globus_ftp_control_response_t *ftp_response)
       typedef void(* globus_ftp_client_plugin_fault_t) (globus_ftp_client_plugin_t *plugin, void
           *plugin_specific, globus_ftp_client_handle_t *handle, const char *url, globus_object_t
           *error)
       typedef void(* globus_ftp_client_plugin_complete_t) (globus_ftp_client_plugin_t *plugin,
           void *plugin_specific, globus_ftp_client_handle_t *handle)
       typedef struct globus_i_ftp_client_plugin_t globus_i_ftp_client_plugin_t
           FTP Client Plugin.

   Enumerations
       enum globus_ftp_client_plugin_command_mask_t {  }

   Functions
       globus_result_t globus_ftp_client_plugin_restart_list (globus_ftp_client_handle_t *handle,
           const char *url, const globus_ftp_client_operationattr_t *attr, const globus_abstime_t
           *when)
       globus_result_t globus_ftp_client_plugin_restart_verbose_list (globus_ftp_client_handle_t
           *handle, const char *url, const globus_ftp_client_operationattr_t *attr, const
           globus_abstime_t *when)
       globus_result_t globus_ftp_client_plugin_restart_machine_list (globus_ftp_client_handle_t
           *handle, const char *url, const globus_ftp_client_operationattr_t *attr, const
           globus_abstime_t *when)
       globus_result_t globus_ftp_client_plugin_restart_recursive_list
           (globus_ftp_client_handle_t *handle, const char *url, const
           globus_ftp_client_operationattr_t *attr, const globus_abstime_t *when)
       globus_result_t globus_ftp_client_plugin_restart_mlst (globus_ftp_client_handle_t *handle,
           const char *url, const globus_ftp_client_operationattr_t *attr, const globus_abstime_t
           *when)
       globus_result_t globus_ftp_client_plugin_restart_stat (globus_ftp_client_handle_t *handle,
           const char *url, const globus_ftp_client_operationattr_t *attr, const globus_abstime_t
           *when)
       globus_result_t globus_ftp_client_plugin_restart_chmod (globus_ftp_client_handle_t
           *handle, const char *url, int mode, const globus_ftp_client_operationattr_t *attr,
           const globus_abstime_t *when)
       globus_result_t globus_ftp_client_plugin_restart_chgrp (globus_ftp_client_handle_t
           *handle, const char *url, const char *group, const globus_ftp_client_operationattr_t
           *attr, const globus_abstime_t *when)
       globus_result_t globus_ftp_client_plugin_restart_utime (globus_ftp_client_handle_t
           *handle, const char *url, const struct tm *utime_time, const
           globus_ftp_client_operationattr_t *attr, const globus_abstime_t *when)
       globus_result_t globus_ftp_client_plugin_restart_symlink (globus_ftp_client_handle_t
           *handle, const char *url, const char *link_url, const
           globus_ftp_client_operationattr_t *attr, const globus_abstime_t *when)
       globus_result_t globus_ftp_client_plugin_restart_cksm (globus_ftp_client_handle_t *handle,
           const char *url, globus_off_t offset, globus_off_t length, const char *algorithm,
           const globus_ftp_client_operationattr_t *attr, const globus_abstime_t *when)
       globus_result_t globus_ftp_client_plugin_restart_delete (globus_ftp_client_handle_t
           *handle, const char *url, const globus_ftp_client_operationattr_t *attr, const
           globus_abstime_t *when)
       globus_result_t globus_ftp_client_plugin_restart_feat (globus_ftp_client_handle_t *handle,
           const char *url, const globus_ftp_client_operationattr_t *attr, const globus_abstime_t
           *when)
       globus_result_t globus_ftp_client_plugin_restart_mkdir (globus_ftp_client_handle_t
           *handle, const char *url, const globus_ftp_client_operationattr_t *attr, const
           globus_abstime_t *when)
       globus_result_t globus_ftp_client_plugin_restart_rmdir (globus_ftp_client_handle_t
           *handle, const char *url, const globus_ftp_client_operationattr_t *attr, const
           globus_abstime_t *when)
       globus_result_t globus_ftp_client_plugin_restart_move (globus_ftp_client_handle_t *handle,
           const char *source_url, const char *dest_url, const globus_ftp_client_operationattr_t
           *attr, const globus_abstime_t *when)
       globus_result_t globus_ftp_client_plugin_restart_get (globus_ftp_client_handle_t *handle,
           const char *url, const globus_ftp_client_operationattr_t *attr,
           globus_ftp_client_restart_marker_t *restart_marker, const globus_abstime_t *when)
       globus_result_t globus_ftp_client_plugin_restart_put (globus_ftp_client_handle_t *handle,
           const char *url, const globus_ftp_client_operationattr_t *attr,
           globus_ftp_client_restart_marker_t *restart_marker, const globus_abstime_t *when)
       globus_result_t globus_ftp_client_plugin_restart_third_party_transfer
           (globus_ftp_client_handle_t *handle, const char *source_url, const
           globus_ftp_client_operationattr_t *source_attr, const char *dest_url, const
           globus_ftp_client_operationattr_t *dest_attr, globus_ftp_client_restart_marker_t
           *restart_marker, const globus_abstime_t *when)
       globus_result_t globus_ftp_client_plugin_restart_size (globus_ftp_client_handle_t *handle,
           const char *url, const globus_ftp_client_operationattr_t *attr, const globus_abstime_t
           *when)
       globus_result_t globus_ftp_client_plugin_restart_modification_time
           (globus_ftp_client_handle_t *handle, const char *url, const
           globus_ftp_client_operationattr_t *attr, const globus_abstime_t *when)
       globus_result_t globus_ftp_client_plugin_restart_get_marker (globus_ftp_client_handle_t
           *handle, globus_ftp_client_restart_marker_t *marker)
       globus_result_t globus_ftp_client_plugin_abort (globus_ftp_client_handle_t *handle)
       globus_result_t globus_ftp_client_plugin_add_data_channels (globus_ftp_client_handle_t
           *handle, unsigned int num_channels, unsigned int stripe)
       globus_result_t globus_ftp_client_plugin_remove_data_channels (globus_ftp_client_handle_t
           *handle, unsigned int num_channels, unsigned int stripe)

Detailed Description

       Plugin API.

       A plugin is a way to implement application-independent reliability and performance tuning
       behavior. Plugins are written using the API described in this document.

       A plugin is created by defining a globus_ftp_client_plugin_t which contains the function
       pointers and plugin-specific data needed for the plugin's operation. It is recommended
       that a plugin define a a globus_module_descriptor_t and plugin initialization functions,
       to ensure that the plugin is properly initialized.

       The functions pointed to in a plugin are called when significant events in the life of an
       FTP Client operation occur. Note that plugins will only be called when the plugin has the
       function pointer for both the operation (get, put, list, etc), and the event (connect,
       authenticate, command, etc), are defined. The command and response functions are filtered
       based on the command_mask defined in the plugin structure.

       Every plugin must define copy  and destroy  functions. The copy function is called when
       the plugin is added to an attribute set or a handle is initialized with an attribute set
       containing the plugin. The destroy function is called when the handle or attribute set is
       destroyed.

Typedef Documentation

   typedef void(* globus_ftp_client_plugin_abort_t) (globus_ftp_client_plugin_t *plugin, void
       *plugin_specific, globus_ftp_client_handle_t *handle)
       Plugin abort notification callback.

       This callback is used to notify a plugin that an abort is being requested on a client
       handle. This notification happens both when the user aborts a request and when a plugin
       aborts the currently active request.

       Parameters
           plugin The plugin which is being notified.
           plugin_specific Plugin-specific data.
           handle The handle associated with the request.

   typedef void(* globus_ftp_client_plugin_authenticate_t) (globus_ftp_client_plugin_t *plugin,
       void *plugin_specific, globus_ftp_client_handle_t *handle, const char *url, const
       globus_ftp_control_auth_info_t *auth_info)
       Plugin authentication notification callback.

       This callback is used to notify a plugin that an authentication handshake is being done
       for this client handle. This notification can occur when a new request is made or when a
       hard restart is done by a plugin.

       If a response_callback is defined by a plugin, then that will be once the authentication
       has completed (successfully or unsuccessfully).

       Parameters
           plugin The plugin which is being notified.
           plugin_specific Plugin-specific data.
           handle The handle associated with the connection.
           url The URL of the server to connect to.
           auth_info Authentication and authorization info being used to authenticate with the
           FTP or GridFTP server.

   typedef void(* globus_ftp_client_plugin_chgrp_t) (globus_ftp_client_plugin_t *plugin, void
       *plugin_specific, globus_ftp_client_handle_t *handle, const char *url, const char *group,
       const globus_ftp_client_operationattr_t *attr, globus_bool_t restart)
       Plugin chgrp notification callback.

       This callback is used to notify a plugin that a chgrp is being requested on a client
       handle. This notification happens both when the user requests a chgrp, and when a plugin
       restarts the currently active chgrp request.

       If this function is not defined by the plugin, then no plugin callbacks associated with
       the chgrp will be called.

       Parameters
           plugin The plugin which is being notified.
           plugin_specific Plugin-specific data.
           handle The handle associated with the delete operation.
           url The url to chgrp.
           group The group name or ID to change to.
           attr The attributes to be used during this operation.
           restart This value is set to GLOBUS_TRUE when this callback is caused by a plugin
           restarting the current delete operation; otherwise, this is set to GLOBUS_FALSE.

   typedef void(* globus_ftp_client_plugin_chmod_t) (globus_ftp_client_plugin_t *plugin, void
       *plugin_specific, globus_ftp_client_handle_t *handle, const char *url, int mode, const
       globus_ftp_client_operationattr_t *attr, globus_bool_t restart)
       Plugin chmod notification callback.

       This callback is used to notify a plugin that a chmod is being requested on a client
       handle. This notification happens both when the user requests a chmod, and when a plugin
       restarts the currently active chmod request.

       If this function is not defined by the plugin, then no plugin callbacks associated with
       the chmod will be called.

       Parameters
           plugin The plugin which is being notified.
           plugin_specific Plugin-specific data.
           handle The handle associated with the delete operation.
           url The url to chmod.
           mode The file mode to be applied.
           attr The attributes to be used during this operation.
           restart This value is set to GLOBUS_TRUE when this callback is caused by a plugin
           restarting the current delete operation; otherwise, this is set to GLOBUS_FALSE.

   typedef void(* globus_ftp_client_plugin_cksm_t) (globus_ftp_client_plugin_t *plugin, void
       *plugin_specific, globus_ftp_client_handle_t *handle, const char *url, globus_off_t
       offset, globus_off_t length, const char *algorithm, const
       globus_ftp_client_operationattr_t *attr, globus_bool_t restart)
       Plugin cksm notification callback.

       This callback is used to notify a plugin that a cksm is being requested on a client
       handle. This notification happens both when the user requests a cksm, and when a plugin
       restarts the currently active cksm request.

       If this function is not defined by the plugin, then no plugin callbacks associated with
       the cksm will be called.

       Parameters
           plugin The plugin which is being notified.
           plugin_specific Plugin-specific data.
           handle The handle associated with the delete operation.
           url The url to cksm.
           offset File offset to start calculating checksum.

           length Length of data to read from the starting offset. Use -1 to read the entire
           file.
           algorithm A pointer to a string to be filled with the checksum of the file. On error
           the value pointed to by it is undefined.

           attr The attributes to be used during this operation.
           restart This value is set to GLOBUS_TRUE when this callback is caused by a plugin
           restarting the current delete operation; otherwise, this is set to GLOBUS_FALSE.

   typedef void(* globus_ftp_client_plugin_command_t) (globus_ftp_client_plugin_t *plugin, void
       *plugin_specific, globus_ftp_client_handle_t *handle, const char *url, const char
       *command)
       Command callback.

       This callback is used to notify a plugin that a FTP control command is being sent. The
       client library will only call this function for response callbacks associated with a
       command which is in the plugin's command mask, and associated with one of the other ftp
       operations with a defined callback in the plugin.

       Parameters
           plugin The plugin which is being notified.
           plugin_specific Plugin-specific data.
           handle The handle associated with the request.
           url The URL which this command is being sent to.
           command A string containing the command which is being sent to the server (TYPE I, for
           example).

   typedef void(* globus_ftp_client_plugin_complete_t) (globus_ftp_client_plugin_t *plugin, void
       *plugin_specific, globus_ftp_client_handle_t *handle)
       Completion notification callback.

       This callback is used to notify a plugin that an operation previously begun has completed.
       The plugin may not call any other plugin operation on this handle after this has occurred.
       This is the final callback for the plugin while processing the operation. The plugin may
       free any internal state associated with the operation at this point.

       Parameters
           plugin The plugin which is being notified.
           plugin_specific Plugin-specific data.
           handle The handle associated with the operation.

   typedef void(* globus_ftp_client_plugin_connect_t) (globus_ftp_client_plugin_t *plugin, void
       *plugin_specific, globus_ftp_client_handle_t *handle, const char *url)
       Plugin connection begin function.

       This callback is used to notify a plugin that connection establishment is being done for
       this client handle. This notification can occur when a new request is made or when a
       restart is done by a plugin.

       If a response_callback is defined by a plugin, then that will be once the connection
       establishment has completed (successfully or unsuccessfully).

       Parameters
           plugin The plugin which is being notified.
           plugin_specific Plugin-specific data.
           handle The handle associated with the connection.
           url The URL of the server to connect to.

       Note
           This function will not be called for a get, put, or third-party transfer operation
           when a cached connection is used.

   typedef globus_ftp_client_plugin_t *(* globus_ftp_client_plugin_copy_t)
       (globus_ftp_client_plugin_t *plugin_template, void *plugin_specific)
       Plugin copy function.

       This function is used to create a new copy or reference count a plugin. This function is
       called by the FTP Client library when a plugin is added to a handle attribute set, or when
       a handle is initialized with an attribute which contains the plugin.

       A plugin may not call any of the plugin API functions from it's instantiate method.

       Parameters
           plugin_template A plugin previously initialized by a call to the plugin-specific
           initialization function. by the user.
           plugin_specific Plugin-specific data.

       Returns
           A pointer to a plugin. This plugin copy must remain valid until the copy's destroy
           function is called on the copy.

       See also
           globus_ftp_client_plugin_destroy_t

   typedef void(* globus_ftp_client_plugin_data_t) (globus_ftp_client_plugin_t *plugin, void
       *plugin_specific, globus_ftp_client_handle_t *handle, globus_object_t *error, const
       globus_byte_t *buffer, globus_size_t length, globus_off_t offset, globus_bool_t eof)
       Plugin data callback handler.

       This callback is used to notify a plugin that a read or write operation previously
       registered has completed. The buffer pointer will match that of a previous plugin read or
       write registration callback.

       Parameters
           plugin The plugin which is being notified.
           plugin_specific Plugin-specific data.
           handle The handle associated with the request.
           error An error which occurred while processing this command/response pair.
           buffer The buffer which was successfully transferred over the network.
           length The amount of data to read or written.
           offset The offset into the file where this data buffer belongs.
           eof This value is set to GLOBUS_TRUE if end-of-file is being processed for this
           transfer.

   typedef void(* globus_ftp_client_plugin_delete_t) (globus_ftp_client_plugin_t *plugin, void
       *plugin_specific, globus_ftp_client_handle_t *handle, const char *url, const
       globus_ftp_client_operationattr_t *attr, globus_bool_t restart)
       Plugin delete notification callback.

       This callback is used to notify a plugin that a delete is being requested on a client
       handle. This notification happens both when the user requests a delete, and when a plugin
       restarts the currently active delete request.

       If this function is not defined by the plugin, then no plugin callbacks associated with
       the delete will be called.

       Parameters
           plugin The plugin which is being notified.
           plugin_specific Plugin-specific data.
           handle The handle associated with the delete operation.
           url The url to be deleted.
           attr The attributes to be used during this operation.
           restart This value is set to GLOBUS_TRUE when this callback is caused by a plugin
           restarting the current delete operation; otherwise, this is set to GLOBUS_FALSE.

   typedef void(* globus_ftp_client_plugin_destroy_t) (globus_ftp_client_plugin_t *plugin, void
       *plugin_specific)
       Plugin destroy function.

       This function is used to free or unreference a copy of a plugin which was allocated by
       calling the instantiate function from the plugin.

       Parameters
           plugin The plugin, created by the create function, which is to be destroyed.
           plugin_specific Plugin-specific data.

   typedef void(* globus_ftp_client_plugin_fault_t) (globus_ftp_client_plugin_t *plugin, void
       *plugin_specific, globus_ftp_client_handle_t *handle, const char *url, globus_object_t
       *error)
       Fault notification callback.

       This callback is used to notify a plugin that a fault occurred while processing the
       request. The fault may be internally generated, or come from a call to another library.

       Parameters
           plugin The plugin which is being notified.
           plugin_specific Plugin-specific data.
           handle The handle associated with the request.
           url The url being processed when the fault ocurred.
           error An error object describing the fault.

   typedef void(* globus_ftp_client_plugin_feat_t) (globus_ftp_client_plugin_t *plugin, void
       *plugin_specific, globus_ftp_client_handle_t *handle, const char *url, const
       globus_ftp_client_operationattr_t *attr, globus_bool_t restart)
       Plugin feat notification callback.

       This callback is used to notify a plugin that a feat is being requested on a client
       handle. This notification happens both when the user requests a feat, and when a plugin
       restarts the currently active feat request.

       If this function is not defined by the plugin, then no plugin callbacks associated with
       the feat will be called.

       Parameters
           plugin The plugin which is being notified.
           plugin_specific Plugin-specific data.
           handle The handle associated with the feat operation.
           url The url to be feat'd.
           attr The attributes to be used during this operation.
           restart This value is set to GLOBUS_TRUE when this callback is caused by a plugin
           restarting the current feat operation; otherwise, this is set to GLOBUS_FALSE.

   typedef void(* globus_ftp_client_plugin_get_t) (globus_ftp_client_plugin_t *plugin, void
       *plugin_specific, globus_ftp_client_handle_t *handle, const char *url, const
       globus_ftp_client_operationattr_t *attr, globus_bool_t restart)
       Plugin get notification callback.

       This callback is used to notify a plugin that a get is being requested on a client handle.
       This notification happens both when the user requests a get, and when a plugin restarts
       the currently active get request.

       If this function is not defined by the plugin, then no plugin callbacks associated with
       the get will be called.

       Parameters
           plugin The plugin which is being notified.
           plugin_specific Plugin-specific data.
           handle The handle associated with the get operation.
           url The url of the get operation.
           attr The attributes to be used during this transfer.
           restart This value is set to GLOBUS_TRUE when this callback is caused by a plugin
           restarting the current get transfer; otherwise, this is set to GLOBUS_FALSE.

   typedef void(* globus_ftp_client_plugin_list_t) (globus_ftp_client_plugin_t *plugin, void
       *plugin_specific, globus_ftp_client_handle_t *handle, const char *url, const
       globus_ftp_client_operationattr_t *attr, globus_bool_t restart)
       Plugin list notification callback.

       This callback is used to notify a plugin that a list is being requested on a client
       handle. This notification happens both when the user requests a list, and when a plugin
       restarts the currently active list request.

       If this function is not defined by the plugin, then no plugin callbacks associated with
       the list will be called.

       Parameters
           plugin The plugin which is being notified.
           plugin_specific Plugin-specific data.
           handle The handle associated with the list operation.
           url The url of the list operation.
           attr The attributes to be used during this transfer.
           restart This value is set to GLOBUS_TRUE when this callback is caused by a plugin
           restarting the current list transfer; otherwise, this is set to GLOBUS_FALSE.

   typedef void(* globus_ftp_client_plugin_machine_list_t) (globus_ftp_client_plugin_t *plugin,
       void *plugin_specific, globus_ftp_client_handle_t *handle, const char *url, const
       globus_ftp_client_operationattr_t *attr, globus_bool_t restart)
       Plugin machine list notification callback.

       This callback is used to notify a plugin that a list is being requested on a client
       handle. This notification happens both when the user requests a list, and when a plugin
       restarts the currently active list request.

       If this function is not defined by the plugin, then no plugin callbacks associated with
       the list will be called.

       Parameters
           plugin The plugin which is being notified.
           plugin_specific Plugin-specific data.
           handle The handle associated with the list operation.
           url The url of the list operation.
           attr The attributes to be used during this transfer.
           restart This value is set to GLOBUS_TRUE when this callback is caused by a plugin
           restarting the current list transfer; otherwise, this is set to GLOBUS_FALSE.

   typedef void(* globus_ftp_client_plugin_mkdir_t) (globus_ftp_client_plugin_t *plugin, void
       *plugin_specific, globus_ftp_client_handle_t *handle, const char *url, const
       globus_ftp_client_operationattr_t *attr, globus_bool_t restart)
       Plugin mkdir notification callback.

       This callback is used to notify a plugin that a mkdir is being requested on a client
       handle. This notification happens both when the user requests a mkdir, and when a plugin
       restarts the currently active mkdir request.

       If this function is not defined by the plugin, then no plugin callbacks associated with
       the mkdir will be called.

       Parameters
           plugin The plugin which is being notified.
           plugin_specific Plugin-specific data.
           handle The handle associated with the mkdir operation.
           url The url of the directory to create.
           attr The attributes to be used during this operation.
           restart This value is set to GLOBUS_TRUE when this callback is caused by a plugin
           restarting the current mkdir operation; otherwise, this is set to GLOBUS_FALSE.

   typedef void(* globus_ftp_client_plugin_mlst_t) (globus_ftp_client_plugin_t *plugin, void
       *plugin_specific, globus_ftp_client_handle_t *handle, const char *url, const
       globus_ftp_client_operationattr_t *attr, globus_bool_t restart)
       Plugin mlst notification callback.

       This callback is used to notify a plugin that a mlst is being requested on a client
       handle. This notification happens both when the user requests a list, and when a plugin
       restarts the currently active list request.

       If this function is not defined by the plugin, then no plugin callbacks associated with
       the list will be called.

       Parameters
           plugin The plugin which is being notified.
           plugin_specific Plugin-specific data.
           handle The handle associated with the list operation.
           url The url of the list operation.
           attr The attributes to be used during this transfer.
           restart This value is set to GLOBUS_TRUE when this callback is caused by a plugin
           restarting the current list transfer; otherwise, this is set to GLOBUS_FALSE.

   typedef void(* globus_ftp_client_plugin_modification_time_t) (globus_ftp_client_plugin_t
       *plugin, void *plugin_specific, globus_ftp_client_handle_t *handle, const char *url, const
       globus_ftp_client_operationattr_t *attr, globus_bool_t restart)
       Plugin modification time notification callback.

       This callback is used to notify a plugin that a modification time check is being requested
       on a client handle. This notification happens both when the user requests the modification
       time of a file, and when a plugin restarts the currently active request.

       If this function is not defined by the plugin, then no plugin callbacks associated with
       the modification time request will be called.

       Parameters
           plugin The plugin which is being notified.
           plugin_specific Plugin-specific data.
           handle The handle associated with the list operation.
           url The url of the list operation.
           attr The attributes to be used during this transfer.
           restart This value is set to GLOBUS_TRUE when this callback is caused by a plugin
           restarting the current list transfer; otherwise, this is set to GLOBUS_FALSE.

   typedef void(* globus_ftp_client_plugin_move_t) (globus_ftp_client_plugin_t *plugin, void
       *plugin_specific, globus_ftp_client_handle_t *handle, const char *source_url, const char
       *dest_url, const globus_ftp_client_operationattr_t *attr, globus_bool_t restart)
       Plugin move notification callback.

       This callback is used to notify a plugin that a move is being requested on a client
       handle. This notification happens both when the user requests a move, and when a plugin
       restarts the currently active move request.

       If this function is not defined by the plugin, then no plugin callbacks associated with
       the move will be called.

       Parameters
           plugin The plugin which is being notified.
           plugin_specific Plugin-specific data.
           handle The handle associated with the move operation.
           source_url The source url of the move operation.
           dest_url The destination url of the move operation.
           attr The attributes to be used during this move.
           restart This value is set to GLOBUS_TRUE when this callback is caused by a plugin
           restarting the current move transfer; otherwise, this is set to GLOBUS_FALSE.

   typedef void(* globus_ftp_client_plugin_put_t) (globus_ftp_client_plugin_t *plugin, void
       *plugin_specific, globus_ftp_client_handle_t *handle, const char *url, const
       globus_ftp_client_operationattr_t *attr, globus_bool_t restart)
       Plugin put notification callback.

       This callback is used to notify a plugin that a put is being requested on a client handle.
       This notification happens both when the user requests a put, and when a plugin restarts
       the currently active put request.

       If this function is not defined by the plugin, then no plugin callbacks associated with
       the put will be called.

       Parameters
           plugin The plugin which is being notified.
           plugin_specific Plugin-specific data.
           handle The handle associated with the put operation.
           url The url of the put operation.
           attr The attributes to be used during this transfer.
           restart This value is set to GLOBUS_TRUE when this callback is caused by a plugin
           restarting the current put transfer; otherwise, this is set to GLOBUS_FALSE.

   typedef void(* globus_ftp_client_plugin_read_t) (globus_ftp_client_plugin_t *plugin, void
       *plugin_specific, globus_ftp_client_handle_t *handle, const globus_byte_t *buffer,
       globus_size_t buffer_length)
       Plugin read registration callback.

       This callback is used to notify a plugin that the client API has registered a buffer with
       the FTP control API for reading when processing a get.

       Parameters
           plugin The plugin which is being notified.
           plugin_specific Plugin-specific data.
           handle The handle associated with the request.
           buffer The data buffer to read into.
           buffer_length The maximum amount of data to read into the buffer.

   typedef void(* globus_ftp_client_plugin_recursive_list_t) (globus_ftp_client_plugin_t *plugin,
       void *plugin_specific, globus_ftp_client_handle_t *handle, const char *url, const
       globus_ftp_client_operationattr_t *attr, globus_bool_t restart)
       Plugin recursive list notification callback.

       This callback is used to notify a plugin that a list is being requested on a client
       handle. This notification happens both when the user requests a list, and when a plugin
       restarts the currently active list request.

       If this function is not defined by the plugin, then no plugin callbacks associated with
       the list will be called.

       Parameters
           plugin The plugin which is being notified.
           plugin_specific Plugin-specific data.
           handle The handle associated with the list operation.
           url The url of the list operation.
           attr The attributes to be used during this transfer.
           restart This value is set to GLOBUS_TRUE when this callback is caused by a plugin
           restarting the current list transfer; otherwise, this is set to GLOBUS_FALSE.

   typedef void(* globus_ftp_client_plugin_response_t) (globus_ftp_client_plugin_t *plugin, void
       *plugin_specific, globus_ftp_client_handle_t *handle, const char *url, globus_object_t
       *error, const globus_ftp_control_response_t *ftp_response)
       Response callback.

       This callback is used to notify a plugin that a FTP control response has occurred on a
       control connection. FTP response callbacks will come back to the user in the order which
       the commands were executed. The client library will only call this function for response
       callbacks associated with a command which is in the plugin's command mask, or associated
       with one of the other ftp operations with a defined callback in the plugin.

       Parameters
           plugin The plugin which is being notified.
           plugin_specific Plugin-specific data.
           handle The handle associated with the request.
           url The URL which this response came from.
           error An error which occurred while processing this command/response pair.
           ftp_response The response structure from the ftp control library.

   typedef void(* globus_ftp_client_plugin_rmdir_t) (globus_ftp_client_plugin_t *plugin, void
       *plugin_specific, globus_ftp_client_handle_t *handle, const char *url, const
       globus_ftp_client_operationattr_t *attr, globus_bool_t restart)
       Plugin rmdir notification callback.

       This callback is used to notify a plugin that a rmdir is being requested on a client
       handle. This notification happens both when the user requests a rmdir, and when a plugin
       restarts the currently active rmdir request.

       If this function is not defined by the plugin, then no plugin callbacks associated with
       the rmdir will be called.

       Parameters
           plugin The plugin which is being notified.
           plugin_specific Plugin-specific data.
           handle The handle associated with the rmdir operation.
           url The url of the rmdir operation.
           attr The attributes to be used during this operation.
           restart This value is set to GLOBUS_TRUE when this callback is caused by a plugin
           restarting the current rmdir operation; otherwise, this is set to GLOBUS_FALSE.

   typedef void(* globus_ftp_client_plugin_size_t) (globus_ftp_client_plugin_t *plugin, void
       *plugin_specific, globus_ftp_client_handle_t *handle, const char *url, const
       globus_ftp_client_operationattr_t *attr, globus_bool_t restart)
       Plugin size notification callback.

       This callback is used to notify a plugin that a size check is being requested on a client
       handle. This notification happens both when the user requests the size of a file, and when
       a plugin restarts the currently active request.

       If this function is not defined by the plugin, then no plugin callbacks associated with
       the size request will be called.

       Parameters
           plugin The plugin which is being notified.
           plugin_specific Plugin-specific data.
           handle The handle associated with the list operation.
           url The url of the list operation.
           attr The attributes to be used during this transfer.
           restart This value is set to GLOBUS_TRUE when this callback is caused by a plugin
           restarting the current list transfer; otherwise, this is set to GLOBUS_FALSE.

   typedef void(* globus_ftp_client_plugin_stat_t) (globus_ftp_client_plugin_t *plugin, void
       *plugin_specific, globus_ftp_client_handle_t *handle, const char *url, const
       globus_ftp_client_operationattr_t *attr, globus_bool_t restart)
       Plugin stat notification callback.

       This callback is used to notify a plugin that a stat is being requested on a client
       handle. This notification happens both when the user requests a list, and when a plugin
       restarts the currently active list request.

       If this function is not defined by the plugin, then no plugin callbacks associated with
       the list will be called.

       Parameters
           plugin The plugin which is being notified.
           plugin_specific Plugin-specific data.
           handle The handle associated with the list operation.
           url The url of the list operation.
           attr The attributes to be used during this transfer.
           restart This value is set to GLOBUS_TRUE when this callback is caused by a plugin
           restarting the current list transfer; otherwise, this is set to GLOBUS_FALSE.

   typedef void(* globus_ftp_client_plugin_symlink_t) (globus_ftp_client_plugin_t *plugin, void
       *plugin_specific, globus_ftp_client_handle_t *handle, const char *url, const char
       *link_url, const globus_ftp_client_operationattr_t *attr, globus_bool_t restart)
       Plugin symlink notification callback.

       This callback is used to notify a plugin that a symlink is being requested on a client
       handle. This notification happens both when the user requests a symlink, and when a plugin
       restarts the currently active symlink request.

       If this function is not defined by the plugin, then no plugin callbacks associated with
       the symlink will be called.

       Parameters
           plugin The plugin which is being notified.
           plugin_specific Plugin-specific data.
           handle The handle associated with the symlink operation.
           url The url of the new link.
           link_url The url to which the new link should point.
           attr The attributes to be used during this operation.
           restart This value is set to GLOBUS_TRUE when this callback is caused by a plugin
           restarting the current utime operation; otherwise, this is set to GLOBUS_FALSE.

   typedef struct globus_i_ftp_client_plugin_t* globus_ftp_client_plugin_t
       FTP Client plugin. An FTP Client plugin is used to add restart, monitoring, and
       performance tuning operations to the FTP Client library, without modifying the base API.
       Multiple plugins may be associated with a globus_ftp_client_handle_t.

       See also
           globus_ftp_client_handle_init(), globus_ftp_client_handle_destroy(),
           globus_ftp_client_handleattr_t, Debugging Plugin

   typedef void(* globus_ftp_client_plugin_third_party_transfer_t) (globus_ftp_client_plugin_t
       *plugin, void *plugin_specific, globus_ftp_client_handle_t *handle, const char
       *source_url, const globus_ftp_client_operationattr_t *source_attr, const char *dest_url,
       const globus_ftp_client_operationattr_t *dest_attr, globus_bool_t restart)
       Plugin third-party transfer notification callback.

       This callback is used to notify a plugin that a transfer is being requested on a client
       handle. This notification happens both when the user requests a transfer, and when a
       plugin restarts the currently active transfer request.

       If this function is not defined by the plugin, then no plugin callbacks associated with
       the third-party transfer will be called.

       Parameters
           plugin The plugin which is being notified.
           plugin_specific Plugin-specific data.
           handle The handle associated with the transfer operation.
           source_url The source url of the transfer operation.
           source_attr The attributes to be used during this transfer on the source.
           dest_url The destination url of the third-party transfer operation.
           dest_attr The attributes to be used during this transfer on the destination.
           restart This value is set to GLOBUS_TRUE when this callback is caused by a plugin
           restarting the current transfer transfer; otherwise, this is set to GLOBUS_FALSE.

   typedef void(* globus_ftp_client_plugin_utime_t) (globus_ftp_client_plugin_t *plugin, void
       *plugin_specific, globus_ftp_client_handle_t *handle, const char *url, const struct tm
       *utime_time, const globus_ftp_client_operationattr_t *attr, globus_bool_t restart)
       Plugin utime notification callback.

       This callback is used to notify a plugin that a utime is being requested on a client
       handle. This notification happens both when the user requests a utime, and when a plugin
       restarts the currently active utime request.

       If this function is not defined by the plugin, then no plugin callbacks associated with
       the utime will be called.

       Parameters
           plugin The plugin which is being notified.
           plugin_specific Plugin-specific data.
           handle The handle associated with the utime operation.
           url The url to utime.
           utime_time The modification time to change the file to.
           attr The attributes to be used during this operation.
           restart This value is set to GLOBUS_TRUE when this callback is caused by a plugin
           restarting the current utime operation; otherwise, this is set to GLOBUS_FALSE.

   typedef void(* globus_ftp_client_plugin_verbose_list_t) (globus_ftp_client_plugin_t *plugin,
       void *plugin_specific, globus_ftp_client_handle_t *handle, const char *url, const
       globus_ftp_client_operationattr_t *attr, globus_bool_t restart)
       Plugin verbose list notification callback.

       This callback is used to notify a plugin that a list is being requested on a client
       handle. This notification happens both when the user requests a list, and when a plugin
       restarts the currently active list request.

       If this function is not defined by the plugin, then no plugin callbacks associated with
       the list will be called.

       Parameters
           plugin The plugin which is being notified.
           plugin_specific Plugin-specific data.
           handle The handle associated with the list operation.
           url The url of the list operation.
           attr The attributes to be used during this transfer.
           restart This value is set to GLOBUS_TRUE when this callback is caused by a plugin
           restarting the current list transfer; otherwise, this is set to GLOBUS_FALSE.

   typedef void(* globus_ftp_client_plugin_write_t) (globus_ftp_client_plugin_t *plugin, void
       *plugin_specific, globus_ftp_client_handle_t *handle, const globus_byte_t *buffer,
       globus_size_t buffer_length, globus_off_t offset, globus_bool_t eof)
       Plugin write registration callback.

       This callback is used to notify a plugin that the client API has registered a buffer with
       the FTP control API for writing when processing a put.

       Parameters
           plugin The plugin which is being notified.
           plugin_specific Plugin-specific data.
           handle The handle associated with the request.
           buffer The buffer which is being written.
           buffer_length The amount of data in the buffer.
           offset The offset within the file where the buffer is to be written.
           eof This value is set to GLOBUS_TRUE if this is the last data buffer to be sent for
           this put request.

   typedef struct globus_i_ftp_client_plugin_t globus_i_ftp_client_plugin_t
       FTP Client Plugin. Each plugin implementation should define a method for initializing one
       of these structures. Plugins may be implemented as either a static function table, or a
       specialized plugin with plugin-specific attributes.

       Each plugin function may be either GLOBUS_NULL, or a valid function pointer. If the
       function is GLOBUS_NULL, then the plugin will not be notified when the corresponding event
       happens.

Enumeration Type Documentation

   enum globus_ftp_client_plugin_command_mask_t
       Command Mask.

       This enumeration includes the types of commands which the plugin is interested in.

       Enumerator

       GLOBUS_FTP_CLIENT_CMD_MASK_CONTROL_ESTABLISHMENT
              connect, authenticate

       GLOBUS_FTP_CLIENT_CMD_MASK_DATA_ESTABLISHMENT
              PASV, PORT, SPOR, SPAS

       GLOBUS_FTP_CLIENT_CMD_MASK_TRANSFER_PARAMETERS
              MODE, TYPE, STRU, OPTS RETR, DCAU

       GLOBUS_FTP_CLIENT_CMD_MASK_TRANSFER_MODIFIERS
              ALLO, REST

       GLOBUS_FTP_CLIENT_CMD_MASK_FILE_ACTIONS
              STOR, RETR, ESTO, ERET, APPE, LIST, NLST, MLSD, MLSR, GET, PUT

       GLOBUS_FTP_CLIENT_CMD_MASK_INFORMATION
              HELP, SITE HELP, FEAT, STAT, SYST, SIZE

       GLOBUS_FTP_CLIENT_CMD_MASK_MISC
              SITE, NOOP

       GLOBUS_FTP_CLIENT_CMD_MASK_BUFFER
              SBUF, ABUF

       GLOBUS_FTP_CLIENT_CMD_MASK_ALL
              All possible commands

Function Documentation

   globus_result_t globus_ftp_client_plugin_abort (globus_ftp_client_handle_t * handle)
       Abort a transfer operation.

       This function will cause the currently executing transfer operation to be aborted. When
       this happens, all plugins will be notified by their abort callbacks. Once those are
       processed, the complete callback will be called for all plugins, and then for the user's
       callback.

       The complete callback will indicate that the transfer did not complete successfully.

       Parameters
           handle The handle which is associated with the transfer.

   globus_result_t globus_ftp_client_plugin_add_data_channels (globus_ftp_client_handle_t *
       handle, unsigned int num_channels, unsigned int stripe)
       Add data channels to an existing put transfer.

       This function will cause the currently executing transfer operation to have additional
       data channels acquired if the attribute set allows it.

       Parameters
           handle The handle which is associated with the transfer.
           num_channels The number of channels to add to the transfer.
           stripe The stripe number to have the channels added to.

       Note
           Do the plugins need to be notified when this happens?

   globus_result_t globus_ftp_client_plugin_remove_data_channels (globus_ftp_client_handle_t *
       handle, unsigned int num_channels, unsigned int stripe)
       Remove data channels from an existing put transfer.

       This function will cause the currently executing transfer operation to have data channels
       removed, if the attribute set allows it.

       Parameters
           handle The handle which is associated with the transfer.
           num_channels The number of channels to remove from the transfer.
           stripe The stripe number to have the channels removed from.

       Note
           Do the plugins need to be notified when this happens?

   globus_result_t globus_ftp_client_plugin_restart_chgrp (globus_ftp_client_handle_t * handle,
       const char * url, const char * group, const globus_ftp_client_operationattr_t * attr,
       const globus_abstime_t * when)
       Restart an existing chgrp.

       This function will cause the currently executing chgrp operation to be restarted. When a
       restart happens, the operation will be silently aborted, and then restarted with
       potentially a new URL and attributes. Any data buffers which are currently queued will be
       cleared and reused once the connection is re-established.

       The user will not receive any notification that a restart has happened. Each plugin which
       is interested in chgrp events will receive a chgrp callback with the restart boolean set
       to GLOBUS_TRUE.

       Parameters
           handle The handle which is associated with the chgrp.
           url The destination URL of the transfer. This may be different than the original
           chgrp's URL, if the plugin decides to redirect to another FTP server due to
           performance or reliability problems with the original URL.
           group The group name or ID to change the file to.
           attr The attributes to use for the new transfer. This may be a modified version of the
           original chgrp's attribute set.
           when Absolute time for when to restart the chgrp. The current control and data
           connections will be stopped immediately. If this completes before when, then the
           restart will be delayed until that time. Otherwise, it will be immediately restarted.

   globus_result_t globus_ftp_client_plugin_restart_chmod (globus_ftp_client_handle_t * handle,
       const char * url, int mode, const globus_ftp_client_operationattr_t * attr, const
       globus_abstime_t * when)
       Restart an existing chmod.

       This function will cause the currently executing chmod operation to be restarted. When a
       restart happens, the operation will be silently aborted, and then restarted with
       potentially a new URL and attributes. Any data buffers which are currently queued will be
       cleared and reused once the connection is re-established.

       The user will not receive any notification that a restart has happened. Each plugin which
       is interested in chmod events will receive a chmod callback with the restart boolean set
       to GLOBUS_TRUE.

       Parameters
           handle The handle which is associated with the chmod.
           url The destination URL of the transfer. This may be different than the original
           chmod's URL, if the plugin decides to redirect to another FTP server due to
           performance or reliability problems with the original URL.
           mode The file mode that will be applied. Must be an octal number repre- senting the
           bit pattern for the new permissions.
           attr The attributes to use for the new transfer. This may be a modified version of the
           original chmod's attribute set.
           when Absolute time for when to restart the chmod. The current control and data
           connections will be stopped immediately. If this completes before when, then the
           restart will be delayed until that time. Otherwise, it will be immediately restarted.

   globus_result_t globus_ftp_client_plugin_restart_cksm (globus_ftp_client_handle_t * handle,
       const char * url, globus_off_t offset, globus_off_t length, const char * algorithm, const
       globus_ftp_client_operationattr_t * attr, const globus_abstime_t * when)
       Restart an existing cksm.

       This function will cause the currently executing cksm operation to be restarted. When a
       restart happens, the operation will be silently aborted, and then restarted with
       potentially a new URL and attributes. Any data buffers which are currently queued will be
       cleared and reused once the connection is re-established.

       The user will not receive any notification that a restart has happened. Each plugin which
       is interested in cksm events will receive a cksm callback with the restart boolean set to
       GLOBUS_TRUE.

       Parameters
           handle The handle which is associated with the cksm.
           url The destination URL of the transfer. This may be different than the original
           cksm's URL, if the plugin decides to redirect to another FTP server due to performance
           or reliability problems with the original URL.
           offset File offset to start calculating checksum.

           length Length of data to read from the starting offset. Use -1 to read the entire
           file.
           algorithm A pointer to a string to be filled with the checksum of the file. On error
           the value pointed to by it is undefined.

           attr The attributes to use for the new transfer. This may be a modified version of the
           original cksm's attribute set.
           when Absolute time for when to restart the cksm. The current control and data
           connections will be stopped immediately. If this completes before when, then the
           restart will be delayed until that time. Otherwise, it will be immediately restarted.

   globus_result_t globus_ftp_client_plugin_restart_delete (globus_ftp_client_handle_t * handle,
       const char * url, const globus_ftp_client_operationattr_t * attr, const globus_abstime_t *
       when)
       Restart an existing delete.

       This function will cause the currently executing delete operation to be restarted. When a
       restart happens, the operation will be silently aborted, and then restarted with
       potentially a new URL and attributes. Any data buffers which are currently queued will be
       cleared and reused once the connection is re-established.

       The user will not receive any notification that a restart has happened. Each plugin which
       is interested in delete events will receive a delete callback with the restart boolean set
       to GLOBUS_TRUE.

       Parameters
           handle The handle which is associated with the delete.
           url The destination URL of the transfer. This may be different than the original
           delete's URL, if the plugin decides to redirect to another FTP server due to
           performance or reliability problems with the original URL.
           attr The attributes to use for the new transfer. This may be a modified version of the
           original delete's attribute set.
           when Absolute time for when to restart the delete. The current control and data
           connections will be stopped immediately. If this completes before when, then the
           restart will be delayed until that time. Otherwise, it will be immediately restarted.

   globus_result_t globus_ftp_client_plugin_restart_feat (globus_ftp_client_handle_t * handle,
       const char * url, const globus_ftp_client_operationattr_t * attr, const globus_abstime_t *
       when)
       Restart an existing feat.

       This function will cause the currently executing feat operation to be restarted. When a
       restart happens, the operation will be silently aborted, and then restarted with
       potentially a new URL and attributes. Any data buffers which are currently queued will be
       cleared and reused once the connection is re-established.

       The user will not receive any notification that a restart has happened. Each plugin which
       is interested in feat events will receive a feat callback with the restart boolean set to
       GLOBUS_TRUE.

       Parameters
           handle The handle which is associated with the feat.
           url The destination URL of the transfer. This may be different than the original
           feat's URL, if the plugin decides to redirect to another FTP server due to performance
           or reliability problems with the original URL.
           attr The attributes to use for the new transfer. This may be a modified version of the
           original feat's attribute set.
           when Absolute time for when to restart the feat. The current control and data
           connections will be stopped immediately. If this completes before when, then the
           restart will be delayed until that time. Otherwise, it will be immediately restarted.

   globus_result_t globus_ftp_client_plugin_restart_get (globus_ftp_client_handle_t * handle,
       const char * url, const globus_ftp_client_operationattr_t * attr,
       globus_ftp_client_restart_marker_t * restart_marker, const globus_abstime_t * when)
       Restart an existing get.

       This function will cause the currently executing transfer operation to be restarted. When
       a restart happens, the operation will be silently aborted, and then restarted with
       potentially a new URL and attributes. Any data buffers which are currently queued will be
       cleared and reused once the connection is re-established.

       The user will not receive any notification that a restart has happened. Each plugin which
       is interested in get events will receive a get callback with the restart boolean set to
       GLOBUS_TRUE.

       Parameters
           handle The handle which is associated with the get.
           url The source URL of the transfer. This may be different than the original get's URL,
           if the plugin decides to redirect to another FTP server due to performance or
           reliability problems with the original URL.
           attr The attributes to use for the new transfer. This may be a modified version of the
           original get's attribute set. This may be useful when the plugin wishes to send
           restart markers to the FTP server to prevent re-sending the data which has already
           been sent.
           restart_marker Plugin-provided restart marker for resuming at a non-default restart
           point. This may be used to implement a persistent restart across process invocations.
           The default behavior if this is NULL is to use any restart information which has been
           received by the ftp client library while processing this operation when restarted.
           when Absolute time for when to restart the get. The current control and data
           connections will be stopped immediately. If this completes before when, then the
           restart will be delayed until that time. Otherwise, it will be immediately restarted.

   globus_result_t globus_ftp_client_plugin_restart_get_marker (globus_ftp_client_handle_t *
       handle, globus_ftp_client_restart_marker_t * marker)
       Get restart marker

       This function will allow this user to get the restart marker associated with a restarted
       file transfer. This function may only be called within the get, put, or third party
       transfer callback in which the 'restart' argument is GLOBUS_TRUE

       Parameters
           handle The handle which is associated with the transfer.
           marker Pointer to an uninitialized restart marker type

       Returns

           • Error on NULL handle or marker

           • Error on invalid use of function

           • GLOBUS_SUCCESS (marker will be populated)

   globus_result_t globus_ftp_client_plugin_restart_list (globus_ftp_client_handle_t * handle,
       const char * url, const globus_ftp_client_operationattr_t * attr, const globus_abstime_t *
       when)
       Restart an existing list.

       This function will cause the currently executing transfer operation to be restarted. When
       a restart happens, the operation will be silently aborted, and then restarted with
       potentially a new URL and attributes. Any data buffers which are currently queued will be
       cleared and reused once the connection is re-established.

       The user will not receive any notification that a restart has happened. Each plugin which
       is interested in list events will receive a list callback with the restart boolean set to
       GLOBUS_TRUE.

       Parameters
           handle The handle which is associated with the list.
           url The destination URL of the transfer. This may be different than the original
           list's URL, if the plugin decides to redirect to another FTP server due to performance
           or reliability problems with the original URL.
           attr The attributes to use for the new transfer. This may be a modified version of the
           original list's attribute set.
           when Absolute time for when to restart the list. The current control and data
           connections will be stopped immediately. If this completes before when, then the
           restart will be delayed until that time. Otherwise, it will be immediately restarted.

   globus_result_t globus_ftp_client_plugin_restart_machine_list (globus_ftp_client_handle_t *
       handle, const char * url, const globus_ftp_client_operationattr_t * attr, const
       globus_abstime_t * when)
       Restart an existing machine list.

       This function will cause the currently executing transfer operation to be restarted. When
       a restart happens, the operation will be silently aborted, and then restarted with
       potentially a new URL and attributes. Any data buffers which are currently queued will be
       cleared and reused once the connection is re-established.

       The user will not receive any notification that a restart has happened. Each plugin which
       is interested in list events will receive a list callback with the restart boolean set to
       GLOBUS_TRUE.

       Parameters
           handle The handle which is associated with the list.
           url The destination URL of the transfer. This may be different than the original
           list's URL, if the plugin decides to redirect to another FTP server due to performance
           or reliability problems with the original URL.
           attr The attributes to use for the new transfer. This may be a modified version of the
           original list's attribute set.
           when Absolute time for when to restart the list. The current control and data
           connections will be stopped immediately. If this completes before when, then the
           restart will be delayed until that time. Otherwise, it will be immediately restarted.

   globus_result_t globus_ftp_client_plugin_restart_mkdir (globus_ftp_client_handle_t * handle,
       const char * url, const globus_ftp_client_operationattr_t * attr, const globus_abstime_t *
       when)
       Restart an existing mkdir.

       This function will cause the currently executing operation to be restarted. When a restart
       happens, the operation will be silently aborted, and then restarted with potentially a new
       URL and attributes. Any data buffers which are currently queued will be cleared and reused
       once the connection is re-established.

       The user will not receive any notification that a restart has happened. Each plugin which
       is interested in mkdir events will receive a mkdir callback with the restart boolean set
       to GLOBUS_TRUE.

       Parameters
           handle The handle which is associated with the mkdir.
           url The destination URL of the transfer. This may be different than the original
           mkdir's URL, if the plugin decides to redirect to another FTP server due to
           performance or reliability problems with the original URL.
           attr The attributes to use for the new transfer. This may be a modified version of the
           original mkdir's attribute set.
           when Absolute time for when to restart the mkdir. The current control and data
           connections will be stopped immediately. If this completes before when, then the
           restart will be delayed until that time. Otherwise, it will be immediately restarted.

   globus_result_t globus_ftp_client_plugin_restart_mlst (globus_ftp_client_handle_t * handle,
       const char * url, const globus_ftp_client_operationattr_t * attr, const globus_abstime_t *
       when)
       Restart an existing MLST.

       This function will cause the currently executing transfer operation to be restarted. When
       a restart happens, the operation will be silently aborted, and then restarted with
       potentially a new URL and attributes. Any data buffers which are currently queued will be
       cleared and reused once the connection is re-established.

       The user will not receive any notification that a restart has happened. Each plugin which
       is interested in list events will receive a list callback with the restart boolean set to
       GLOBUS_TRUE.

       Parameters
           handle The handle which is associated with the list.
           url The destination URL of the transfer. This may be different than the original
           list's URL, if the plugin decides to redirect to another FTP server due to performance
           or reliability problems with the original URL.
           attr The attributes to use for the new transfer. This may be a modified version of the
           original list's attribute set.
           when Absolute time for when to restart the list. The current control and data
           connections will be stopped immediately. If this completes before when, then the
           restart will be delayed until that time. Otherwise, it will be immediately restarted.

   globus_result_t globus_ftp_client_plugin_restart_modification_time (globus_ftp_client_handle_t
       * handle, const char * url, const globus_ftp_client_operationattr_t * attr, const
       globus_abstime_t * when)
       Restart a modification time check operation.

       This function will cause the currently executing modification time check operation to be
       restarted. When a restart happens, the operation will be silently aborted, and then
       restarted with potentially a new URL and attributes.

       The user will not receive any notification that a restart has happened. Each plugin which
       is interested in modification time operations will receive a modification time callback
       with the restart boolean set to GLOBUS_TRUE.

       Parameters
           handle The handle which is associated with the operation.
           url The source URL of the modification time check. This may be different than the
           original operations URL, if the plugin decides to redirect to another FTP server due
           to performance or reliability problems with the original URL.
           attr The attributes to use for the new operation. This may be a modified version of
           the original operations's attribute set.
           when Absolute time for when to restart the modification time check. The current
           control and data connections will be stopped immediately. If this completes before
           when, then the restart will be delayed until that time. Otherwise, it will be
           immediately restarted.

   globus_result_t globus_ftp_client_plugin_restart_move (globus_ftp_client_handle_t * handle,
       const char * source_url, const char * dest_url, const globus_ftp_client_operationattr_t *
       attr, const globus_abstime_t * when)
       Restart an existing move.

       This function will cause the currently executing move operation to be restarted. When a
       restart happens, the operation will be silently aborted, and then restarted with
       potentially new URLs and attributes.

       The user will not receive any notification that a restart has happened. Each plugin which
       is interested in get events will receive a move callback with the restart boolean set to
       GLOBUS_TRUE.

       Parameters
           handle The handle which is associated with the move.
           source_url The source URL of the move. This may be different than the original get's
           URL, if the plugin decides to redirect to another FTP server due to performance or
           reliability problems with the original URL.
           dest_url The destination URL of the move. This may be different than the original
           get's URL, if the plugin decides to redirect to another FTP server due to performance
           or reliability problems with the original URL. Note that only the path component of
           this URL is used.
           attr The attributes to use for the new transfer. This may be a modified version of the
           original move's attribute set. This may be useful when the plugin wishes to send
           restart markers to the FTP server to prevent re-sending the data which has already
           been sent.
           when Absolute time for when to restart the move. The current control and data
           connections will be stopped immediately. If this completes before when, then the
           restart will be delayed until that time. Otherwise, it will be immediately restarted.

   globus_result_t globus_ftp_client_plugin_restart_put (globus_ftp_client_handle_t * handle,
       const char * url, const globus_ftp_client_operationattr_t * attr,
       globus_ftp_client_restart_marker_t * restart_marker, const globus_abstime_t * when)
       Restart an existing put.

       This function will cause the currently executing transfer operation to be restarted. When
       a restart happens, the operation will be silently aborted, and then restarted with
       potentially a new URL and attributes. Any data buffers which are currently queued but not
       called back will be resent once the connection is re-established.

       The user will not receive any notification that a restart has happened. Each plugin which
       is interested in get events will receive a put callback with the restart boolean set to
       GLOBUS_TRUE.

       Parameters
           handle The handle which is associated with the put.
           url The URL of the transfer. This may be different than the original put's URL, if the
           plugin decides to redirect to another FTP server due to performance or reliability
           problems with the original URL. If the put is restarted with a different URL, the
           plugin must re-send any data which has already been acknowledged by it's callback.
           attr The attributes to use for the new transfer. This may be a modified version of the
           original put's attribute set. This may be useful when the plugin wishes to send
           restart markers to the FTP server to prevent re-sending the data which has already
           been sent.
           restart_marker Plugin-provided restart marker for resuming at a non-default restart
           point. This may be used to implement a persistent restart across process invocations.
           The default behavior if this is NULL is to use any restart information which has been
           received by the ftp client library while processing this operation when restarted.
           when Absolute time for when to restart the put. The current control and data
           connections will be stopped immediately. If this completes before when, then the
           restart will be delayed until that time. Otherwise, it will be immediately restarted.

   globus_result_t globus_ftp_client_plugin_restart_recursive_list (globus_ftp_client_handle_t *
       handle, const char * url, const globus_ftp_client_operationattr_t * attr, const
       globus_abstime_t * when)
       Restart an existing recursive list.

       This function will cause the currently executing transfer operation to be restarted. When
       a restart happens, the operation will be silently aborted, and then restarted with
       potentially a new URL and attributes. Any data buffers which are currently queued will be
       cleared and reused once the connection is re-established.

       The user will not receive any notification that a restart has happened. Each plugin which
       is interested in list events will receive a list callback with the restart boolean set to
       GLOBUS_TRUE.

       Parameters
           handle The handle which is associated with the list.
           url The destination URL of the transfer. This may be different than the original
           list's URL, if the plugin decides to redirect to another FTP server due to performance
           or reliability problems with the original URL.
           attr The attributes to use for the new transfer. This may be a modified version of the
           original list's attribute set.
           when Absolute time for when to restart the list. The current control and data
           connections will be stopped immediately. If this completes before when, then the
           restart will be delayed until that time. Otherwise, it will be immediately restarted.

   globus_result_t globus_ftp_client_plugin_restart_rmdir (globus_ftp_client_handle_t * handle,
       const char * url, const globus_ftp_client_operationattr_t * attr, const globus_abstime_t *
       when)
       Restart an existing rmdir.

       This function will cause the currently executing operation to be restarted. When a restart
       happens, the operation will be silently aborted, and then restarted with potentially a new
       URL and attributes. Any data buffers which are currently queued will be cleared and reused
       once the connection is re-established.

       The user will not receive any notification that a restart has happened. Each plugin which
       is interested in rmdir events will receive a rmdir callback with the restart boolean set
       to GLOBUS_TRUE.

       Parameters
           handle The handle which is associated with the rmdir.
           url The destination URL of the transfer. This may be different than the original
           rmdir's URL, if the plugin decides to redirect to another FTP server due to
           performance or reliability problems with the original URL.
           attr The attributes to use for the new transfer. This may be a modified version of the
           original rmdir's attribute set.
           when Absolute time for when to restart the rmdir. The current control and data
           connections will be stopped immediately. If this completes before when, then the
           restart will be delayed until that time. Otherwise, it will be immediately restarted.

   globus_result_t globus_ftp_client_plugin_restart_size (globus_ftp_client_handle_t * handle,
       const char * url, const globus_ftp_client_operationattr_t * attr, const globus_abstime_t *
       when)
       Restart a size check operation.

       This function will cause the currently executing size check operation to be restarted.
       When a restart happens, the operation will be silently aborted, and then restarted with
       potentially a new URL and attributes.

       The user will not receive any notification that a restart has happened. Each plugin which
       is interested in size operations will receive a size callback with the restart boolean set
       to GLOBUS_TRUE.

       Parameters
           handle The handle which is associated with the operation.
           url The source URL of the size check. This may be different than the original
           operations URL, if the plugin decides to redirect to another FTP server due to
           performance or reliability problems with the original URL.
           attr The attributes to use for the new operation. This may be a modified version of
           the original operations's attribute set.
           when Absolute time for when to restart the size check. The current control and data
           connections will be stopped immediately. If this completes before when, then the
           restart will be delayed until that time. Otherwise, it will be immediately restarted.

   globus_result_t globus_ftp_client_plugin_restart_stat (globus_ftp_client_handle_t * handle,
       const char * url, const globus_ftp_client_operationattr_t * attr, const globus_abstime_t *
       when)
       Restart an existing STAT.

       This function will cause the currently executing transfer operation to be restarted. When
       a restart happens, the operation will be silently aborted, and then restarted with
       potentially a new URL and attributes. Any data buffers which are currently queued will be
       cleared and reused once the connection is re-established.

       The user will not receive any notification that a restart has happened. Each plugin which
       is interested in list events will receive a list callback with the restart boolean set to
       GLOBUS_TRUE.

       Parameters
           handle The handle which is associated with the list.
           url The destination URL of the transfer. This may be different than the original
           list's URL, if the plugin decides to redirect to another FTP server due to performance
           or reliability problems with the original URL.
           attr The attributes to use for the new transfer. This may be a modified version of the
           original list's attribute set.
           when Absolute time for when to restart the list. The current control and data
           connections will be stopped immediately. If this completes before when, then the
           restart will be delayed until that time. Otherwise, it will be immediately restarted.

   globus_result_t globus_ftp_client_plugin_restart_symlink (globus_ftp_client_handle_t * handle,
       const char * url, const char * link_url, const globus_ftp_client_operationattr_t * attr,
       const globus_abstime_t * when)
       Restart an existing symlink.

       This function will cause the currently executing symlink operation to be restarted. When a
       restart happens, the operation will be silently aborted, and then restarted with
       potentially a new URL and attributes. Any data buffers which are currently queued will be
       cleared and reused once the connection is re-established.

       The user will not receive any notification that a restart has happened. Each plugin which
       is interested in chgrp events will receive a chgrp callback with the restart boolean set
       to GLOBUS_TRUE.

       Parameters
           handle The handle which is associated with the chgrp.
           url The destination URL of the transfer. This may be different than the original
           symlink's URL, if the plugin decides to redirect to another FTP server due to
           performance or reliability problems with the original URL.
           link_url The URL to symbolically link the file to.
           attr The attributes to use for the new transfer. This may be a modified version of the
           original symlink's attribute set.
           when Absolute time for when to restart the symlink. The current control and data
           connections will be stopped immediately. If this completes before when, then the
           restart will be delayed until that time. Otherwise, it will be immediately restarted.

   globus_result_t globus_ftp_client_plugin_restart_third_party_transfer
       (globus_ftp_client_handle_t * handle, const char * source_url, const
       globus_ftp_client_operationattr_t * source_attr, const char * dest_url, const
       globus_ftp_client_operationattr_t * dest_attr, globus_ftp_client_restart_marker_t *
       restart_marker, const globus_abstime_t * when)
       Restart an existing third-party transfer.

       This function will cause the currently executing transfer operation to be restarted. When
       a restart happens, the operation will be silently aborted, and then restarted with
       potentially a new URLs and attributes.

       The user will not receive any notification that a restart has happened. Each plugin which
       is interested in third-party transfer events will receive a transfer callback with the
       restart boolean set to GLOBUS_TRUE.

       Parameters
           handle The handle which is associated with the transfer.
           source_url The source URL of the transfer. This may be different than the original
           URL, if the plugin decides to redirect to another FTP server due to performance or
           reliability problems with the original URL
           source_attr The attributes to use for the new transfer. This may be a modified version
           of the original transfer's attribute set. This may be useful when the plugin wishes to
           send restart markers to the FTP server to prevent re-sending the data which has
           already been sent.
           dest_url The destination URL of the transfer. This may be different than the original
           destination URL, if the plugin decides to redirect to another FTP server due to
           performance or reliability problems with the original URL.
           dest_attr The attributes to use for the new transfer. This may be a modified version
           of the original transfer's attribute set. This may be useful when the plugin wishes to
           send restart markers to the FTP server to prevent re-sending the data which has
           already been sent.
           restart_marker Plugin-provided restart marker for resuming at a non-default restart
           point. This may be used to implement a persistent restart across process invocations.
           The default behavior if this is NULL is to use any restart information which has been
           received by the ftp client library while processing this operation when restarted.
           when Absolute time for when to restart the transfer. The current control and data
           connections will be stopped immediately. If this completes before when, then the
           restart will be delayed until that time. Otherwise, it will be immediately restarted.

   globus_result_t globus_ftp_client_plugin_restart_utime (globus_ftp_client_handle_t * handle,
       const char * url, const struct tm * utime_time, const globus_ftp_client_operationattr_t *
       attr, const globus_abstime_t * when)
       Restart an existing utime.

       This function will cause the currently executing utime operation to be restarted. When a
       restart happens, the operation will be silently aborted, and then restarted with
       potentially a new URL and attributes. Any data buffers which are currently queued will be
       cleared and reused once the connection is re-established.

       The user will not receive any notification that a restart has happened. Each plugin which
       is interested in utime events will receive a utime callback with the restart boolean set
       to GLOBUS_TRUE.

       Parameters
           handle The handle which is associated with the chgrp.
           url The destination URL of the transfer. This may be different than the original
           utime's URL, if the plugin decides to redirect to another FTP server due to
           performance or reliability problems with the original URL.
           utime_time The time value to change the file to.
           attr The attributes to use for the new transfer. This may be a modified version of the
           original utime's attribute set.
           when Absolute time for when to restart the utime. The current control and data
           connections will be stopped immediately. If this completes before when, then the
           restart will be delayed until that time. Otherwise, it will be immediately restarted.

   globus_result_t globus_ftp_client_plugin_restart_verbose_list (globus_ftp_client_handle_t *
       handle, const char * url, const globus_ftp_client_operationattr_t * attr, const
       globus_abstime_t * when)
       Restart an existing verbose list.

       This function will cause the currently executing transfer operation to be restarted. When
       a restart happens, the operation will be silently aborted, and then restarted with
       potentially a new URL and attributes. Any data buffers which are currently queued will be
       cleared and reused once the connection is re-established.

       The user will not receive any notification that a restart has happened. Each plugin which
       is interested in list events will receive a list callback with the restart boolean set to
       GLOBUS_TRUE.

       Parameters
           handle The handle which is associated with the list.
           url The destination URL of the transfer. This may be different than the original
           list's URL, if the plugin decides to redirect to another FTP server due to performance
           or reliability problems with the original URL.
           attr The attributes to use for the new transfer. This may be a modified version of the
           original list's attribute set.
           when Absolute time for when to restart the list. The current control and data
           connections will be stopped immediately. If this completes before when, then the
           restart will be delayed until that time. Otherwise, it will be immediately restarted.

Author

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