GETDTABLESIZE(2) BSD System Calls Manual GETDTABLESIZE(2)NAME
getdtablesize -- get descriptor table size
Standard C Library (libc, -lc)
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.
The getrlimit(2) function returns a value of type rlim_t. This interface, returning an int, may have problems representing appropriate val-
ues in the future. Applications should use the getrlimit(2) function instead.
SEE ALSO close(2), dup(2), getrlimit(2), open(2), select(2)HISTORY
The getdtablesize() function call appeared in 4.2BSD.
BSD June 4, 1993 BSD
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getdtablesize(3C) Standard C Library Functions getdtablesize(3C)NAME
getdtablesize - get the file descriptor table size
The getdtablesize() function is equivalent to getrlimit(2) with the RLIMIT_NOFILE option.
The getdtablesize() function returns the current soft limit as if obtained from a call to getrlimit() with the RLIMIT_NOFILE option.
No errors are defined.
There is no direct relationship between the value returned by getdtablesize() and OPEN_MAX defined in <limits.h>.
Each process has a file 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 getdtablesize() function returns the current maximum size of this table by calling the getrlimit()
SEE ALSO close(2), getrlimit(2), open(2), setrlimit(2), select(3C)SunOS 5.11 1 Mar 1996 getdtablesize(3C)
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