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GETDTABLESIZE(2)	       System Calls Manual		GETDTABLESIZE(2)

NAME
     getdtablesize -- get file descriptor limit

LIBRARY
     Standard C Library (libc, -lc)

SYNOPSIS
     #include <unistd.h>

     int
     getdtablesize(void);

DESCRIPTION
     The getdtablesize() system call returns the maximum number of file descrip-
     tors that the current process may open.  The maximum file descriptor number
     that  the	system	may assign is the return value minus one.  Existing file
     descriptor numbers may be higher if the limit was lowered after  they  were
     opened.

SEE ALSO
     close(2), closefrom(2), dup(2), getrlimit(2), sysconf(3)

HISTORY
     The getdtablesize() system call appeared in 4.2BSD.

FreeBSD ports 15.quarterly	 April 24, 2013 		GETDTABLESIZE(2)

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<https://man.freebsd.org/cgi/man.cgi?query=getdtablesize&sektion=2&manpath=FreeBSD+15.1-RELEASE+and+Ports.quarterly>

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