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# getdtablesize() - Unix, Linux System Call

# 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 4.2BSD).

# SEE ALSO

- close (2)

- dup (2)

- getrlimit (2)

- open (2)

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