[#subprocess-input-2constructor-05]
= xref:subprocess.adoc[subprocess]::xref:subprocess/input.adoc[input]::input
:relfileprefix: ../../
:mrdocs:

Uses an already open file descriptor as the child's input.

== Synopsis

Declared in `<util/subprocess.h>`

[source,cpp,subs="verbatim,replacements,macros,-callouts"]
----
explicit
input(int fd);
----

== Parameters

[cols="1,4"]
|===
| Name| Description
| *fd*
| Readable file descriptor to feed to the child.
|===


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