getdtablesize - Get the size of the descriptor table
Interfaces documented on this reference page conform to
industry standards as follows:
getdtablesize(): XSH4.2, XSH5.0
Refer to the standards(5) reference page for more information
about industry standards and associated tags.
The getdtablesize() function returns the maximum number of
file descriptors in a process' descriptor table. Each process
has a fixed size descriptor table that is guaranteed
to have at least 64 slots. The entries in the descriptor
table are numbered with small integers starting at 0
The getdtablesize() function returns the total number of
file descriptors that a process can have open simultaneously.
Each process is limited to a fixed number of open
file descriptors. This limit is at least 64. The systemdefined
limit is configurable. If it is greater than 64,
the system will allocate more file descriptors for a process
up to the defined maximum. See the descriptions of
the open_max_hard and open_max_soft attributes in
sys_attrs_proc(5) for information about changing the perprocess
limit on open file descriptors.
The getdtablesize() function returns the size of the
descriptor table, and is always successful.
Functions: close(2), getrlimit(2), open(2), select(2)
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