gfs_rename renames a file or directory gfarm_url_from to gfarm_url_to.
If gfarm_url_to already exists, it will be replaced. In this case, when gfarm_url_from is a file gfarm_url_to also must be a file, when gfarm_url_from is a directory, gfarm_url_to must be a empty directory.
Gfs_rename() can't rename a directory to a subdirectory of itself.
NULL
The function terminated successfully.
GFARM_ERR_NO_MEMORY
Insufficient memory was available.
GFARM_ERR_AUTHENTICATION
User authentication failed when connecting to gfmd(8).
GFARM_ERR_PERMISSION_DENIED
The parent directory of gfarm_url_from or gfarm_url_to did not allow write permission.
GFARM_ERR_INVALID_ARGUMENT
A attempt was made to rename the directory gfarm_url_from to a subdirectory of itself.
GFARM_ERR_NO_SUCH_OBJECT
gfarm_url_from does not exist.
GFARM_ERR_IS_A_DIRECTORY
gfarm_url_to is a existing directory, though gfarm_url_from is not a directory.
GFARM_NOT_IS_A_DIRECTORY
gfarm_url_to is not a directory. though gfarm_url_from is a directory.
An error except the above occurred. The reason is shown by its pointed strings.