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getdtablesize(2) -- Linux man page
NAME
getdtablesize - get descriptor table size
SYNOPSIS
#include <unistd.h>
int getdtablesize(void);
DESCRIPTION
getdtablesize
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.
NOTES
getdtablesize
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 BSD 4.2).
SEE ALSO
close(2),
dup(2),
getrlimit(2),
open(2)
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