/usr/include/wx-3.0/wx/unix/pipe.h is in wx3.0-headers 3.0.0-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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// Name: wx/unix/pipe.h
// Purpose: wxPipe class
// Author: Vadim Zeitlin
// Modified by:
// Created: 24.06.2003 (extracted from src/unix/utilsunx.cpp)
// Copyright: (c) 2003 Vadim Zeitlin <vadim@wxwidgets.org>
// Licence: wxWindows licence
///////////////////////////////////////////////////////////////////////////////
#ifndef _WX_UNIX_PIPE_H_
#define _WX_UNIX_PIPE_H_
#include <unistd.h>
#include <fcntl.h>
#include "wx/log.h"
#include "wx/intl.h"
// ----------------------------------------------------------------------------
// wxPipe: this class encapsulates pipe() system call
// ----------------------------------------------------------------------------
class wxPipe
{
public:
// the symbolic names for the pipe ends
enum Direction
{
Read,
Write
};
enum
{
INVALID_FD = -1
};
// default ctor doesn't do anything
wxPipe() { m_fds[Read] = m_fds[Write] = INVALID_FD; }
// create the pipe, return TRUE if ok, FALSE on error
bool Create()
{
if ( pipe(m_fds) == -1 )
{
wxLogSysError(wxGetTranslation("Pipe creation failed"));
return false;
}
return true;
}
// switch the given end of the pipe to non-blocking IO
bool MakeNonBlocking(Direction which)
{
const int flags = fcntl(m_fds[which], F_GETFL, 0);
if ( flags == -1 )
return false;
return fcntl(m_fds[which], F_SETFL, flags | O_NONBLOCK) == 0;
}
// return TRUE if we were created successfully
bool IsOk() const { return m_fds[Read] != INVALID_FD; }
// return the descriptor for one of the pipe ends
int operator[](Direction which) const { return m_fds[which]; }
// detach a descriptor, meaning that the pipe dtor won't close it, and
// return it
int Detach(Direction which)
{
int fd = m_fds[which];
m_fds[which] = INVALID_FD;
return fd;
}
// close the pipe descriptors
void Close()
{
for ( size_t n = 0; n < WXSIZEOF(m_fds); n++ )
{
if ( m_fds[n] != INVALID_FD )
{
close(m_fds[n]);
m_fds[n] = INVALID_FD;
}
}
}
// dtor closes the pipe descriptors
~wxPipe() { Close(); }
private:
int m_fds[2];
};
#endif // _WX_UNIX_PIPE_H_
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