gdaemon_unix.cpp
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1 //
2 // Copyright (C) 2001-2013 Graeme Walker <graeme_walker@users.sourceforge.net>
3 //
4 // This program is free software: you can redistribute it and/or modify
5 // it under the terms of the GNU General Public License as published by
6 // the Free Software Foundation, either version 3 of the License, or
7 // (at your option) any later version.
8 //
9 // This program is distributed in the hope that it will be useful,
10 // but WITHOUT ANY WARRANTY; without even the implied warranty of
11 // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
12 // GNU General Public License for more details.
13 //
14 // You should have received a copy of the GNU General Public License
15 // along with this program. If not, see <http://www.gnu.org/licenses/>.
16 // ===
17 //
18 // gdaemon_unix.cpp
19 //
20 
21 #include "gdef.h"
22 #include "gdaemon.h"
23 #include "gprocess.h"
24 #include "gnewprocess.h"
25 
26 void G::Daemon::detach( PidFile & pid_file )
27 {
28  pid_file.check() ; // absolute path
29  detach() ;
30 }
31 
33 {
34  // see Stevens, ISBN 0-201-563137-7, ch 13.
35 
37  ::_exit( 0 ) ;
38 
39  setsid() ;
40  G_IGNORE_RETURN(bool) Process::cd( "/" , Process::NoThrow() ) ;
41 
43  ::_exit( 0 ) ;
44 }
45 
46 void G::Daemon::setsid()
47 {
48  G_IGNORE_RETURN(pid_t) ::setsid() ;
49 }
50 
void check()
Throws an exception if the path is not absolute.
Definition: gpidfile.cpp:92
An overload discriminator for Process.
Definition: gprocess.h:76
static Who fork()
Forks a child process.
static void detach()
Detaches from the parent environment.
static void cd(const Path &dir)
Changes directory.
A class for creating pid files.
Definition: gpidfile.h:56