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ttdt_file_request(3)
CDE


NAME
  ttdt_file_request - create and send a standard ToolTalk request about a
  file

SYNOPSIS
  #include <Tt/tttk.h>
  Tt_message ttdt_file_request(Tt_message context,
			       Tttk_op op,
			       Tt_scope scope,
			       const char *pathname,
			       Ttdt_file_cb cb,
			       void *client_data,
			       int send_and_destroy);

DESCRIPTION
  The ttdt_file_request function is used to create (and optionally send) any
  of the standard Desktop file requests such as Get_Modified, Save, and
  Revert.

  The ttdt_file_request function creates a request with the specified op and
  scope, and sets its file attribute to pathname.  The function adds an unset
  argument of Tt_mode TT_IN and vtype File to the request, per the Desktop
  messaging conventions.  If op is TTDT_GET_MODIFIED, ttdt_file_request also
  adds an unset TT_OUT argument of vtype Boolean to the request.  The
  ttdt_file_request function installs cb as a message callback for the
  created request, and ensures that client_data will be passed into the
  callback.  (The Ttdt_file_cb callback is described under ttdt_file_join3).
  If send is True, ttdt_file_request sends the request before returning the
  handle to it; otherwise, it only creates the request.

  The context argument describes the environment to use.  If context is not
  zero, messages created by ttdt_file_request inherit from context all
  contexts whose slotname begins with the characters ENV_.

RETURN VALUE
  Upon successful completion, the ttdt_file_request function returns the
  created Tt_message; otherwise, it returns an error pointer.  The
  application can use tt_ptr_error3 to extract one of the following Tt_status
  values from the returned handle:
  The ToolTalk service could not access the ToolTalk database needed for this
  operation.
  The ToolTalk service could not access the specified ToolTalk database in
  the expected place.
  There is insufficient memory available to perform the function.
  The ttsession1 process is not running and the ToolTalk service cannot
  restart it.
  The ToolTalk service has more active messages than it can handle.  (The

  maximum number of active messages is implementation specific, but is at
  least 2000.)
  The pathname argument was NULL or was a ToolTalk error pointer.
  The specified process identifier is out of date or invalid.


APPLICATION USAGE
  The ttdt_file_request function is a lower-level interface than
  ttdt_Get_Modified, ttdt_Save, and ttdt_Revert, since the latter functions
  create and send the request and then block on its reply.

SEE ALSO
  Tt/tttk.h5, ttdt_Get_Modified3, ttdt_Save3, ttdt_Revert3, ttdt_file_join3.