Here are some restrictions to be aware of when handling files in
the QSYS.LIB file system.
- Logical files are not supported.
- Physical files supported for text mode access are program-described physical
files containing a single field and source physical files containing a single
text field. Physical files supported for binary mode access include externally-described
physical files in addition to those files supported for text mode access.
- Byte-range locking is not supported. For more
information about byte-range locking, see the fcntl() topic
.
- If any job has a database file member open, only one job is given write
access to that file member at any time. Other requests are allowed only read
access.