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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 descriptors 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.
April 24, 2013 Linux 4.19.0-6-amd64