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
gfarm_url points outside your accessible address space.
GFARM_ERR_NO_SUCH_OBJECT
gfarm_url does not exist.
GFARM_ERR_NOT_A_DIRECTORY
A component of the path prefix is not a directory.
An error except the above occurred. The reason is shown by its pointed strings.