[#subprocess-output-2constructor-06]
= xref:subprocess.adoc[subprocess]::xref:subprocess/output.adoc[output]::output
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Constructors

== Synopses

Declared in `<util/subprocess.h>`

Sets up a pipe as the child's output channel.


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explicit
xref:subprocess/output/2constructor-00.adoc[output](xref:subprocess/IOTYPE.adoc[IOTYPE] typ);
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Uses an already open file descriptor as the child's output.


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explicit
xref:subprocess/output/2constructor-03.adoc[output](int fd);
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Uses the descriptor of an open FILE stream as the child's output.


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explicit
xref:subprocess/output/2constructor-0e.adoc[output](FILE* fp);
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Opens a file for appending and uses it as the child's output.


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explicit
xref:subprocess/output/2constructor-07.adoc[output](char const* filename);
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== Parameters

[cols="1,4"]
|===
| Name| Description
| *typ*
| Channel type, which must be PIPE.
| *fd*
| Writable file descriptor to capture the child's output.
| *fp*
| Open FILE stream whose descriptor is used.
| *filename*
| Path of the file to create or append to.
|===


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