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source: source/ariba/utility/transport/tcpip/protlib/setuid.h @ 9686

Last change on this file since 9686 was 9686, checked in by mies, 8 years ago

put protlib doc to protlib module

File size: 2.7 KB
Line 
1/// ----------------------------------------*- mode: C++; -*--
2/// @file setuid.h
3/// Change effective user ID in a thread-safe way
4/// ----------------------------------------------------------
5/// $Id: setuid.h 2549 2007-04-02 22:17:37Z bless $
6/// $HeadURL: https://svn.ipv6.tm.uka.de/nsis/protlib/trunk/include/setuid.h $
7// ===========================================================
8//                     
9// Copyright (C) 2005-2007, all rights reserved by
10// - Institute of Telematics, Universitaet Karlsruhe (TH)
11//
12// More information and contact:
13// https://projekte.tm.uka.de/trac/NSIS
14//                     
15// This program is free software; you can redistribute it and/or modify
16// it under the terms of the GNU General Public License as published by
17// the Free Software Foundation; version 2 of the License
18//
19// This program is distributed in the hope that it will be useful,
20// but WITHOUT ANY WARRANTY; without even the implied warranty of
21// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
22// GNU General Public License for more details.
23//
24// You should have received a copy of the GNU General Public License along
25// with this program; if not, write to the Free Software Foundation, Inc.,
26// 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
27//
28// ===========================================================
29/** @ingroup protlib
30 *
31 * Thread-safe setuid support for linux.
32 * Change effective user ID in a thread-safe way.
33 *
34 * tsdb::init() must be called before calling setuid::init().
35 */
36
37#ifndef THREADSAFE_SETUID_H
38#define THREADSAFE_SETUID_H
39
40#include <sys/types.h>
41#include <pthread.h>
42#include <string>
43
44#include "protlib_types.h"
45#include "cleanuphandler.h"
46
47namespace protlib { 
48
49/** @addtogroup protlib
50 * @{
51 */
52
53/// Thread-safe setuid
54/** This class provieds class methods for changing the effective user ID of
55 * the current process.
56 */
57class setuid {
58public:
59        /// initialize setuid
60        static void init();
61        /// cleanup setuid resources
62        static void end();
63        /// turn on setuid mode
64        static void on();
65        /// turn off setuid mode
66        static void off();
67private:
68        /// init state
69        static bool is_init;
70        /// setuid mutex
71        static pthread_mutex_t mutex;
72        /// setuid counter
73        static uint32 count;
74        /// file user ID
75        static uid_t file_userid;
76        /// file user name
77        static string file_username;
78        /// real user ID
79        static uid_t real_userid;
80        /// real user name
81        static string real_username;
82        /// are we using setuid?
83        static bool is_setuid;
84}; // end class setuid
85
86/// Turn on setuid mode and install cleanup handler.
87#define BEGIN_SETUID_MODE protlib::setuid::on(); install_cleanup(call_void_fun,protlib::setuid::off)
88#define END_SETUID_MODE uninstall_cleanup(1)
89
90//@}
91
92} // end namespace protlib
93
94#endif
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