---
name: "closefrom"
section: "2freebsd"
platform: "linux"
package: "freebsd-manpages"
version: "12.2-2"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/close_range/2freebsd"
---

# closefrom(2freebsd)

delete open file descriptors

Part of [close\_range(2freebsd)](/close_range/2freebsd.md).

## NAME

**closefrom**, **close\_range** – delete open file descriptors

## LIBRARY

Standard C Library (libc, -lc)

## SYNOPSIS

**#include \<unistd.h\>**

*void*\

**closefrom**(*int lowfd*);

*int*\

**close\_range**(*u\_int lowfd*, *u\_int highfd*, *int flags*);

## DESCRIPTION

The **closefrom**() system call deletes all open file descriptors greater than or equal to *lowfd* from the per-process object reference table. Any errors encountered while closing file descriptors are ignored.

The **close\_range**() system call deletes all open file descriptors between *lowfd* and *highfd* inclusive, clamped to the range of open file descriptors. Any errors encountered while closing file descriptors are ignored. There are currently no defined *flags*.

## RETURN VALUES

Upon successful completion, **close\_range**() returns a value of 0. Otherwise, a value of -1 is returned and the global variable *errno* is set to indicate the error.

## ERRORS

The **close\_range**() system call will fail if:

- \[EINVAL\]

  The *highfd* argument is lower than the *lowfd* argument.

- \[EINVAL\]

  An invalid flag was set.

## SEE ALSO

[close(2)](/close/2.md)

## HISTORY

The **closefrom**() function first appeared in FreeBSD 8.0.