/
suid.c
85 lines (75 loc) · 1.82 KB
/
suid.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
/*
* hfsutils - tools for reading and writing Macintosh HFS volumes
* Copyright (C) 1996, 1997 Robert Leslie
*
* This program 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.
*
* This program 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 more 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., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* $Id: suid.c,v 1.6 1997/11/11 21:35:55 rob Exp $
*/
/* Modified for emx by Marcus Better, November 1997 */
# ifdef HAVE_CONFIG_H
# include "config.h"
# endif
# ifdef HAVE_UNISTD_H
# include <unistd.h>
# else
uid_t getuid(void);
uid_t geteuid(void);
gid_t getgid(void);
gid_t getegid(void);
int setreuid(uid_t, uid_t);
int setregid(gid_t, gid_t);
# endif
# include "suid.h"
#ifndef __EMX__
static uid_t uid, euid;
static gid_t gid, egid;
#endif
/*
* NAME: suid->init()
* DESCRIPTION: initialize application which may be running setuid/setgid
*/
void suid_init(void)
{
#ifndef __EMX__
uid = getuid();
gid = getgid();
euid = geteuid();
egid = getegid();
suid_disable();
#endif
}
/*
* NAME: suid->enable()
* DESCRIPTION: engage any setuid privileges
*/
void suid_enable(void)
{
#ifndef __EMX__
setreuid(-1, euid);
setregid(-1, egid);
#endif
}
/*
* NAME: suid->disable()
* DESCRIPTION: revoke all setuid privileges
*/
void suid_disable(void)
{
#ifndef __EMX__
setreuid(-1, uid);
setregid(-1, gid);
#endif
}