Most MPI users will probably not need to use the
fctl
command; see lamclean(1).
The
fctl
command controls important file daemon (filed) attributes and support features.
With no options,
fctl
reports the current working directory that is prepended to all partial
pathnames on rfopen(2).
A file name on the command line becomes the new working directory.
Another important role of
fctl
is cleaning the debris that can form in filed in certain application
crashes or bugs.
Any file descriptor can be swept clean by indicating its handle (number)
with the
-c
option.
If desired, all descriptors, save stdio (0, 1, 2), can be cleaned
and filed effectively reset with the
-S
option.