---
name: "Filter::Util::Exec"
section: "3pm"
platform: "linux"
package: "libfilter-perl"
version: "1.64-2"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/Filter::Util::Exec"
---

# Filter::Util::Exec(3pm)

exec source filter

## NAME

Filter::Util::Exec - exec source filter

## SYNOPSIS

```
    use Filter::Util::Exec;
```

## DESCRIPTION

This module is provides the interface to allow the creation of *Source* *Filters* which use a Unix coprocess.

See Filter::exec, Filter::cpp and Filter::sh for examples of the use of this module.

Note that the size of the buffers is limited to 32-bit.

### filter\_add()

The function, `"filter_add"` installs a filter. It takes one parameter which should be a reference. The kind of reference used will dictate which of the two filter types will be used.

If a CODE reference is used then a *closure filter* will be assumed.

If a CODE reference is not used, a *method filter* will be assumed. In a *method filter*, the reference can be used to store context information. The reference will be *blessed* into the package by `"filter_add"`.

See Filter::Util::Call for examples of using context information using both *method filters* and *closure filters*.

## AUTHOR

Paul Marquess

## DATE

11th December 1995.