GETDTABLESIZE(2) System Calls Manual GETDTABLESIZE(2)NAME
getdtablesize - get descriptor table size
nfds = getdtablesize()
Each process has a fixed size descriptor table, which is guaranteed to have at least 20 slots. The entries in the descriptor table are
numbered with small integers starting at 0. The call getdtablesize returns the size of this table.
SEE ALSO close(2), dup(2), open(2), select(2)4.2 Berkeley Distribution June 28, 1985 GETDTABLESIZE(2)
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getdtablesize(2) System Calls Manual getdtablesize(2)NAME
getdtablesize - Gets the descriptor table size
int getdtablesize ( void );
Interfaces documented on this reference page conform to industry standards as follows:
Refer to the standards(5) reference page for more information about industry standards and associated tags.
The getdtablesize() function returns the total 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 start-
ing at 0 (zero).
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 system defined limit is configurable. If it is
greater than 64, the system will allocate more file descriptors for a process up to the defined maximum.
The getdtablesize() function returns the size of the descriptor table, and is always successful.
Functions: close(2), open(2), select(2)
Standards: standards(5) delim off
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