Process.hpp
/* This file is part of Raul.
* Copyright (C) 2007-2009 David Robillard <http://drobilla.net>
*
* Raul is free software; you can redistribute it and/or modify it under the
* terms of the GNU General Public License as published by the Free Software
* Foundation; either version 2 of the License, or (at your option) any later
* version.
*
* Raul 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 General Public License for details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
*/
#ifndef RAUL_PROCESS_HPP
#define RAUL_PROCESS_HPP
#include <sys/resource.h>
#include <sys/time.h>
#include <unistd.h>
#include <iostream>
#include <string>
#include <boost/utility.hpp>
#include "raul/log.hpp"
namespace Raul {
class Process : boost::noncopyable
{
public:
static bool launch(const std::string& command) {
const std::string executable = (command.find(" ") != std::string::npos)
? command.substr(0, command.find(" "))
: command;
const std::string arguments = command.substr((command.find(" ") + 1));
info << "Launching child process '" << executable << "' with arguments '"
<< arguments << "'" << std::endl;
// Use the same double fork() trick as JACK to prevent zombie children
const int err = fork();
if (err == 0) {
// (child)
// close all nonstandard file descriptors
struct rlimit max_fds;
getrlimit(RLIMIT_NOFILE, &max_fds);
for (rlim_t fd = 3; fd < max_fds.rlim_cur; ++fd)
close(fd);
switch (fork()) {
case 0:
// (grandchild)
setsid();
execlp(executable.c_str(), arguments.c_str(), NULL);
_exit(-1);
case -1:
// (second) fork failed, there is no grandchild
_exit (-1);
/* exit the child process here */
default:
_exit (0);
}
}
return (err > 0);
}
private:
Process() {}
};
} // namespace Raul
#endif // RAUL_PROCESS_HPP
Raul::Process::launch
static bool launch(const std::string &command)
Launch a sub process.
Definition: Process.hpp:47
Raul
Definition: Array.hpp:26
Raul::Process
A child process.
Definition: Process.hpp:39