GETDTABLESIZE(2) System Calls GETDTABLESIZE(2)
getdtablesize - get descriptor table size
Each process has a fixed size descriptor table, which is guaranteed to
have at least 20 slots. The entries in the descriptor table are num-
bered with small integers starting at 0. The call getdtablesize
returns the size of this table.
This call is mainly intended for use on systems which have configurable
kernels. Since the GNO kernel is not yet configurable, this function
always returns OPEN_MAX.
The concept of the maximum number of concurrently open files is not yet
consistent between GS/OS, the GNO kernel, and the C library. For exam-
ple, the kernel uses OPEN_MAX as the largest number of open files, yet
GS/OS does not have a hard upper limit. It is recommended for now that
the return value of getdtablesize be assumed in applications to be the
largest number of open files, as it is the smallest value.
close(2), dup(2), open(2), select(2)
The getdtablesize function call appeared in 4.2BSD.
GNO 22 February 1996 GETDTABLESIZE(2)
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