gd_move—move a Dirfile entry between format specification fragments
int gd_move(DIRFILE *dirfile, const char *field_code, int new_fragment, unsigned int flags);
The gd_move() function transfers the field or alias specified by field_code, which should not have a representation suffix, defined in the dirfile specified by dirfile from it's current format specification fragment to the fragment indexed by new_fragment. If the field is already defined in the fragment index by new_fragment, this function does nothing and returns no error.
If the new fragment has different affixes, the field will be renamed as part of the move. See gd_rename(3) for details on field renaming. The field is closed before moving, resulting in it's I/O pointer being reset to the beginning-of-field.
The flags parameter should be zero or more of the following flags, bitwise or'd together:
If this flag is not specified, no changes will be made to the binary file. If field_code specifies a field of type other than RAW, this flag is ignored.
If the binary file is translated, and the frame offset of the destination fragment is larger than that of the source fragment, this will result in permanent deletion of data from the database. If the new frame offset is smaller than the old frame offset, the binary file will be padded at the front with zeroes.
On success, gd_move() returns zero. On error, a negative-valued error code is returned. Possible error codes are:
The error code is also stored in the DIRFILE object and may be retrieved after this function returns by calling gd_error(3). A descriptive error string for the error may be obtained by calling gd_error_string(3).
A binary file translation occurs out-of-place. As a result, sufficient space must be present on the filesystem for both the binary file before translation and the binary file after translation.
The dirfile_move() function appeared in GetData-0.5.0. It had no flags parameter. In place of flags was int move_data. Passing a non-zero value for this parameter had the same effect as the GD_REN_DATA flag does now.
In GetData-0.7.0, this function was renamed to gd_move().
In all GetData-0.8.x releases, passing an alias name to this function would move the target of the alias. To move an alias itself, a separate function, gd_move_alias() was available.
In GetData-0.9.0, gd_move_alias() was removed. Also in this release, the move_data parameter was repaced with the flags parameter.
In GetData-0.10.0, the error return from this function changed from −1 to a negative-valued error code.
gd_metaflush(3), gd_open(3), gd_error(3), gd_error_string(3), dirfile(5), dirfile-format(5)