getdtablesize - get size of descriptor table

Syntax

#include <unistd.h> int getdtablesize(void);

Description getdtablesize() is equivalent to the getrlimit() function if RLIMIT_NOFILE is

	specified. getdtablesize() is not thread-safe.
Return val.	Current limit for the number of simultaneously open file descriptors per process
		if successful.
	-1	if an error occurs.
Notes	There is no direct relationship between the value returned by getdtablesize() and the {OPEN_MAX} constant defined in limits.h.
See also	close(), getrlimit(), open(), select(), setrlimit(), limits.h, unistd.h.