gd_flush(3) [debian man page]

gd_flush(3)							      GETDATA							       gd_flush(3)

NAME

       gd_flush -- write all pending dirfile changes to disk.

SYNOPSIS

       #include <getdata.h>

       int gd_flush(DIRFILE *dirfile, const char *field_code);

DESCRIPTION

       The  gd_flush()	function  flushes  and	closes	all  file handles associated with field_code, or its input(s), in the dirfile specified by
       dirfile.  If the field_code contains a valid representation suffix, it will be ignored.	As a special case,  if	field_code  is	NULL,  all
       fields  in  dirfile will be flushed and closed.	In this special case, modified metadata will also be flushed to disk as if gd_metaflush(3)
       had been called.

       Metadata is written to disk using the current Standards Version as stored in the dirfile object.  See gd_dirfile_standards(3) to change	or
       report  the  current Standards Version.	If the dirfile metadata conforms to no known Standards Version, a Standards non-compliant fragment
       will be written.

RETURN VALUE

       On success, zero is returned.  On error, -1 is returned and the dirfile error is set to a non-zero error value.	Possible error values are:

       GD_E_BAD_CODE
	       The field specified by field_code was not found in the database.

       GD_E_BAD_DIRFILE
	       The supplied dirfile was invalid.

       GD_E_BAD_REPR
	       The representation suffix specified in field_code was not recognised.

       GD_E_FLUSH
	       A temporary file could not be opened into which to write the modified metadata, or renaming the temporary file  over  the  original
	       fragment failed.  Only returned when field_code is NULL.

       GD_E_RAW_IO
	       An error occurred while trying to flush or close the field(s).

       The  dirfile error may be retrieved by calling gd_error(3).  A descriptive error string for the last error encountered can be obtained from
       a call to gd_error_string(3).

SEE ALSO

       gd_open(3), gd_close(3), gd_dirfile_standards(3), gd_error(3), gd_error_string(3), gd_metaflush(3)

Version 0.7.0							   24 July 2010 						       gd_flush(3)

gd_close(3)							      GETDATA							       gd_close(3)

NAME

       gd_close, gd_discard -- close a dirfile and free associated memory.

SYNOPSIS

       #include <getdata.h>

       int gd_close(DIRFILE *dirfile);

       int gd_discard(DIRFILE *dirfile);

DESCRIPTION

       The  gd_close()	function first calls gd_flush(3) (with field_code set to NULL) to flush all metadata changes to disk and to close all file
       handles associated with dirfile.  It then frees memory associated with the DIRFILE object.  If dirfile is NULL, nothing	happens,  and  the
       call succeeds.

       The  gd_discard()  function  behaves  similarly, except modified metadata is not written to disk, but simply discarded.	In order to ensure
       that modified data files associated with RAW fields are properly terminated, changes to RAW data files are still flushed to  disk  by  this
       function.  If dirfile was opened in read-only mode, gd_discard() and gd_close() behave identically.

       One  of	these functions should be called on all pointers returned by gd_cbopen(3), gd_open(3), and gd_invalid_dirfile(3), even if the call
       to those function failed.  After gd_close() or gd_discard() returns successfully, the pointer dirfile should be considered invalid.

       Metadata is written to disk using the current Standards Version as stored in the dirfile object.  See gd_dirfile_standards(3) to change	or
       report  the  current  Standards	Version.  If the dirfile metadata conforms to no known Standards Version, Standards non-compliant metadata
       will be written.

RETURN VALUE

       gd_close() and gd_discard() return zero on success.  On error, they do not de-allocate dirfile and set the dirfile error to a non-zero  er-
       ror value.  Possible error values are:

       GD_E_FLUSH
	       A  temporary  file  could not be opened into which to write the modified metadata, or renaming the temporary file over the original
	       fragment failed.

       GD_E_RAW_IO
	       An error occurred while trying to flush or close one or more open raw files.  In this case, another call to gd_close()  or  gd_dis-
	       card() may be attempted.

       The  dirfile error may be retrieved by calling gd_error(3).  A descriptive error string for the last error encountered can be obtained from
       a call to gd_error_string(3).

SEE ALSO

       gd_cbopen(3), gd_dirfile_standards(3), gd_error(3), gd_error_string(3), gd_flush(3), gd_invalid_dirfile(3), gd_open(3)

Version 0.7.0							  20 October 2010						       gd_close(3)