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// Copyright (C) 2011 Internet Systems Consortium, Inc. ("ISC")
//
// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.
#ifndef UTIL_IO_FD_H
#define UTIL_IO_FD_H 1
#include <unistd.h>
/**
* @file fd.h
* @short Wrappers around common unix fd manipulation functions.
*/
namespace isc {
namespace util {
namespace io {
/*
* \short write() that writes everything.
* Wrapper around write(). The difference is, it never writes less data
* and looks successful (eg. it blocks until all data are written).
* Retries on signals.
*
* \return True if successful, false otherwise. The errno variable is left
* intact.
* \param fd Where to write.
* \param data The buffer to write.
* \param length How much data is there to write.
*/
bool
write_data(const int fd, const void *data, const size_t length);
/*
* \short read() that reads everything.
* Wrapper around read(). It does not do short reads, if it returns less,
* it means there was EOF. It retries on signals.
*
* \return Number of bytes read or -1 on error.
* \param fd Where to read data from.
* \param data Where to put the data.
* \param length How many of them.
*/
ssize_t
read_data(const int fd, void *buffer, const size_t length);
}
}
}
#endif // UTIL_IO_FD_H
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