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//
// PipeImpl_POSIX.cpp
//
// Library: Foundation
// Package: Processes
// Module: PipeImpl
//
// Copyright (c) 2004-2006, Applied Informatics Software Engineering GmbH.
// and Contributors.
//
// SPDX-License-Identifier: BSL-1.0
//
#include "Poco/PipeImpl_POSIX.h"
#include "Poco/Exception.h"
#include <sys/types.h>
#include <unistd.h>
#include <errno.h>
namespace Poco {
PipeImpl::PipeImpl()
{
int fds[2];
int rc = pipe(fds);
if (rc == 0)
{
_readfd = fds[0];
_writefd = fds[1];
}
else throw CreateFileException("anonymous pipe");
}
PipeImpl::~PipeImpl()
{
closeRead();
closeWrite();
}
int PipeImpl::writeBytes(const void* buffer, int length)
{
poco_assert (_writefd != -1);
int n;
do
{
n = write(_writefd, buffer, length);
}
while (n < 0 && errno == EINTR);
if (n >= 0)
return n;
else
throw WriteFileException("anonymous pipe");
}
int PipeImpl::readBytes(void* buffer, int length)
{
poco_assert (_readfd != -1);
int n;
do
{
n = read(_readfd, buffer, length);
}
while (n < 0 && errno == EINTR);
if (n >= 0)
return n;
else
throw ReadFileException("anonymous pipe");
}
PipeImpl::Handle PipeImpl::readHandle() const
{
return _readfd;
}
PipeImpl::Handle PipeImpl::writeHandle() const
{
return _writefd;
}
void PipeImpl::closeRead()
{
if (_readfd != -1)
{
close(_readfd);
_readfd = -1;
}
}
void PipeImpl::closeWrite()
{
if (_writefd != -1)
{
close(_writefd);
_writefd = -1;
}
}
} // namespace Poco
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