# PR_Recv

Receives bytes from a connected socket.

## Syntax

```{code}
#include <prio.h>

PRInt32 PR_Recv(
  PRFileDesc *fd,
  void *buf,
  PRInt32 amount,
  PRIntn flags,
  PRIntervalTime timeout);
```

### Parameters

The function has the following parameters:

`fd`

: A pointer to a {ref}`PRFileDesc` object representing a socket.

`buf`

: A pointer to a buffer to hold the data received.

`amount`

: The size of `buf` (in bytes).

`flags`

: Must be zero or `PR_MSG_PEEK`.

`timeout`

: A value of type {ref}`PRIntervalTime` specifying the time limit for
  completion of the receive operation.

### Returns

The function returns one of the following values:

- A positive number indicates the number of bytes actually received.
- The value 0 means the network connection is closed.
- The value -1 indicates a failure. The reason for the failure can be
  obtained by calling {ref}`PR_GetError`.

## Description

{ref}`PR_Recv` blocks until some positive number of bytes are transferred,
a timeout occurs, or an error occurs. No more than `amount` bytes will
be transferred.