48 lines
1.2 KiB
Markdown
48 lines
1.2 KiB
Markdown
# PR_CreatePipe
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Creates an anonymous pipe and retrieves file descriptors for the read
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and write ends of the pipe.
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## Syntax
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```{code}
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#include <prio.h>
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PRStatus PR_CreatePipe(
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PRFileDesc **readPipe,
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PRFileDesc **writePipe);
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```
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### Parameters
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The function has the following parameters:
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`readPipe`
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: A pointer to a {ref}`PRFileDesc` pointer. On return, this parameter
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contains the file descriptor for the read end of the pipe.
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`writePipe`
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: A pointer to a {ref}`PRFileDesc` pointer. On return, this parameter
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contains the file descriptor for the write end of the pipe.
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### Returns
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The function returns one of these values:
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- If the pipe is successfully created, `PR_SUCCESS`.
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- If the pipe is not successfully created, `PR_FAILURE`. The error
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code can be retrieved via {ref}`PR_GetError`.
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## Description
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{ref}`PR_CreatePipe` creates an anonymous pipe. Data written into the write
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end of the pipe can be read from the read end of the pipe. Pipes are
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useful for interprocess communication between a parent and a child
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process. When the pipe is no longer needed, both ends should be closed
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with calls to {ref}`PR_Close`.
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{ref}`PR_CreatePipe` is currently implemented on Unix, Linux, Mac OS X, and
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Win32 only.
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