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/*
* Copyright (c) 2008-2010 Cisco Systems, Inc. All rights reserved.
* Copyright (c) 2009 Sandia National Laboratories. All rights reserved.
*
* $COPYRIGHT$
*
* Additional copyrights may follow
*
* $HEADER$
*/
/* @file */
#ifndef OPAL_UTIL_FD_H_
#define OPAL_UTIL_FD_H_
#include "opal_config.h"
BEGIN_C_DECLS
/**
* Read a complete buffer from a file descriptor.
*
* @param fd File descriptor
* @param len Number of bytes to read
* @param buffer Pre-allocated buffer (large enough to hold len bytes)
*
* @returns OPAL_SUCCESS upon success.
* @returns OPAL_ERR_TIMEOUT if the fd closes before reading the full amount.
* @returns OPAL_ERR_IN_ERRNO otherwise.
*
* Loop over reading from the fd until len bytes are read or an error
* occurs. EAGAIN and EINTR are transparently handled.
*/
OPAL_DECLSPEC int opal_fd_read(int fd, int len, void *buffer);
/**
* Write a complete buffer to a file descriptor.
*
* @param fd File descriptor
* @param len Number of bytes to write
* @param buffer Buffer to write from
*
* @returns OPAL_SUCCESS upon success.
* @returns OPAL_ERR_IN_ERRNO otherwise.
*
* Loop over writing to the fd until len bytes are written or an error
* occurs. EAGAIN and EINTR are transparently handled.
*/
OPAL_DECLSPEC int opal_fd_write(int fd, int len, const void *buffer);
END_C_DECLS
#endif
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