man NJB_Reset_Get_Datafile_Tag (Fonctions bibliothèques) - List the data files stored on the NJB.
NAME
NJB_Get_Datafile_Tag, NJB_Reset_Get_Datafile_Tag - List the data files stored on the NJB.
LIBRARY
libnjb
SYNOPSIS
#include <libnjb.h>
extern int njb_error
void NJB_Reset_Get_Datafile_Tag (njb_t *njb)
datafile_t *NJB_Get_Datafile_Tag (njb_t *njb)
DESCRIPTION
This function is used to obtain a list of data files stored on the NJB. Each call to NJB_Get_Datafile_Tag returns a datafile_t object that contains the datafile tag. It is the program's responsibility to free this memory using the datafile_destroy(3) function when the tag is no longer needed. Tags are returned one at a time, in no particular order. NJB_Reset_Get_Datafile_Tag resets the fetch list to the beginning.
When all the data file tags have been returned, a NULL pointer is returned and njb_error is set to EO_NOMEM.
RETURN VALUES
NJB_Get_Datafile_Tag returns a datafile_t object on success. If an error occurs, a NULL pointer is returned and njb_error is set accordingly.
- EO_BADDATA
- An invalid datafile tag was received.
- EO_BADSTATUS
- The NJB returned a non-zero status.
- EO_EOM
- No more data file tags remain.
- EO_NOMEM
- There was not enough memory available to create the datafile_t object.
- EO_RDSHORT
- Fewer bytes than expected were sent by the NJB on the bulk data pipe.
- EO_USBBLK
- An I/O error occurred on the bulk data pipe.
- EO_USBCTL
- An I/O error occurred on the control pipe.