GETDTABLESIZE(2) Linux Programmer's Manual GETDTABLESIZE(2)NAMEgetdtablesize - get descriptor table size
SYNOPSIS
#include <unistd.h>
int getdtablesize(void);
DESCRIPTIONgetdtablesize() returns the maximum number of files a process can have
open, one more than the largest possible value for a file descriptor.
RETURN VALUE
The current limit on the number of open files per process.
NOTESgetdtablesize() is implemented as a libc library function. The glibc
version calls getrlimit(2) and returns the current RLIMIT_NOFILE limit,
or OPEN_MAX when that fails. The libc4 and libc5 versions return
OPEN_MAX (set to 256 since Linux 0.98.4).
CONFORMING TO
SVr4, 4.4BSD (the getdtablesize() function first appeared in 4.2BSD).
SEE ALSOclose(2), dup(2), getrlimit(2), open(2)Linux 2.4 2002-04-15 GETDTABLESIZE(2)