103 lines
2.5 KiB
C++
103 lines
2.5 KiB
C++
/* Copyright (C) 2004 The glibmm Development Team
|
|
*
|
|
* This library is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU Library General Public
|
|
* License as published by the Free Software Foundation; either
|
|
* version 2 of the License, or (at your option) any later version.
|
|
*
|
|
* This library is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
* Library General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU Library General Public
|
|
* License along with this library; if not, write to the Free
|
|
* Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*/
|
|
|
|
#include <glibmm.h>
|
|
#include <fcntl.h>
|
|
#include <unistd.h>
|
|
#include <limits.h>
|
|
#include <sys/types.h>
|
|
#include <sys/stat.h>
|
|
#include <iostream>
|
|
#include <string>
|
|
|
|
#include "fdstream.h"
|
|
|
|
fdstream input_stream;
|
|
Glib::RefPtr<Glib::MainLoop> mainloop;
|
|
|
|
/*
|
|
send to the fifo with:
|
|
echo "Hello" > testfifo
|
|
|
|
quit the program with:
|
|
echo "Q" > testfifo
|
|
*/
|
|
|
|
// this will be our signal handler for read operations
|
|
// it will print out the message sent to the fifo
|
|
// and quit the program if the message was, or began
|
|
// with, 'Q'
|
|
bool MyCallback(Glib::IOCondition io_condition)
|
|
{
|
|
if ((io_condition & Glib::IO_IN) == 0)
|
|
{
|
|
std::cerr << "Invalid fifo response" << std::endl;
|
|
}
|
|
else
|
|
{
|
|
// stream for stdout (does the same as std::cout
|
|
// - this is an example of using fdstream for output)
|
|
fdstream out(1, false);
|
|
std::string text;
|
|
input_stream >> text;
|
|
out << text << std::endl;
|
|
|
|
if (text[0] == 'Q')
|
|
mainloop->quit();
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
|
|
int main( /* int argc, char *argv[] */)
|
|
{
|
|
Glib::init();
|
|
|
|
// the usual Glib::Main object
|
|
mainloop = Glib::MainLoop::create();
|
|
|
|
if(access("testfifo", F_OK) == -1)
|
|
{
|
|
// fifo doesn't exit - create it
|
|
if (mkfifo("testfifo", 0666) != 0)
|
|
{
|
|
std::cerr << "error creating fifo" << std::endl;
|
|
return -1;
|
|
}
|
|
}
|
|
|
|
int read_fd = open("testfifo", O_RDONLY);
|
|
if(read_fd == -1)
|
|
{
|
|
std::cerr << "error opening fifo" << std::endl;
|
|
return -1;
|
|
}
|
|
|
|
input_stream.attach(read_fd);
|
|
input_stream.connect(sigc::ptr_fun(MyCallback), Glib::IO_IN);
|
|
|
|
// and last but not least - run the application main loop
|
|
mainloop->run();
|
|
|
|
// now remove the temporary fifo
|
|
if(unlink("testfifo"))
|
|
std::cerr << "error removing fifo" << std::endl;
|
|
|
|
return 0;
|
|
}
|