[#subprocess-error-2constructor-0e]
= xref:subprocess.adoc[subprocess]::xref:subprocess/error.adoc[error]::error
:relfileprefix: ../../
:mrdocs:

Constructors

== Synopses

Declared in `<util/subprocess.h>`

Sets up the error channel as a pipe, or as a copy of standard output.


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xref:subprocess/error/2constructor-01.adoc[error](xref:subprocess/IOTYPE.adoc[IOTYPE] typ);
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Uses an already open file descriptor as the child's error channel.


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xref:subprocess/error/2constructor-00.adoc[error](int fd);
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Uses the descriptor of an open FILE stream as the child's error channel.


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xref:subprocess/error/2constructor-03.adoc[error](FILE* fp);
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Opens a file for appending and uses it as the child's error channel.


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xref:subprocess/error/2constructor-0c.adoc[error](char const* filename);
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== Parameters

[cols="1,4"]
|===
| Name| Description
| *typ*
| Channel type, either PIPE or STDOUT; STDOUT defers wiring until all arguments are known.
| *fd*
| Writable file descriptor to capture the child's error output.
| *fp*
| Open FILE stream whose descriptor is used.
| *filename*
| Path of the file to create or append to.
|===


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