---
name: "Perl::Critic::Policy::InputOutput::ProhibitOneArgSelect"
section: "3pm"
platform: "linux"
package: "perl-perl-critic"
version: "1.156-3"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/Perl::Critic::Policy::InputOutput::ProhibitOneArgSelect"
---

# Perl::Critic::Policy::InputOutput::ProhibitOneArgSelect(3pm)

Never write "select($fh)".

## NAME

Perl::Critic::Policy::InputOutput::ProhibitOneArgSelect - Never write "select($fh)".

## AFFILIATION

This Policy is part of the core Perl::Critic distribution.

## DESCRIPTION

Conway discourages the use of a raw `select()` when setting autoflushes.  We'll extend that further by simply prohibiting the one-argument form of `select()` entirely; if you really need it you should know when/where/why that is.  For performing autoflushes, Conway recommends the use of `"IO::Handle"` instead.

```
  select((select($fh), $|=1)[0]);     # not ok
  select $fh;                         # not ok
   use IO::Handle;
   $fh->autoflush();                   # ok
   *STDOUT->autoflush();               # ok
```

## CONFIGURATION

This Policy is not configurable except for the standard options.

## SEE ALSO

IO::Handle.

## AUTHOR

Graham TerMarsch \<graham@howlingfrog.com\>

## COPYRIGHT

Copyright (c) 2005-2011 Graham TerMarsch.  All rights reserved.

This program is free software; you can redistribute it and/or modify it under the same terms as Perl itself.