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
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
|
/* $OpenBSD: pt_file.c,v 1.9 2003/06/11 06:22:14 deraadt Exp $ */
/* $NetBSD: pt_file.c,v 1.7 1995/06/06 19:54:30 mycroft Exp $ */
/*
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
* All rights reserved.
*
* This code is derived from software donated to Berkeley by
* Jan-Simon Pendry.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* from: Id: pt_file.c,v 1.1 1992/05/25 21:43:09 jsp Exp
* @(#)pt_file.c 8.3 (Berkeley) 7/3/94
*/
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/types.h>
#include <sys/param.h>
#include <sys/syslog.h>
#include "portald.h"
int
portal_file(struct portal_cred *pcr, char *key, char **v, int so, int *fdp)
{
int fd;
char pbuf[MAXPATHLEN];
int error;
pbuf[0] = '/';
(void)strncpy(pbuf+1, key + (v[1] ? strlen(v[1]) : 0), sizeof pbuf-2);
pbuf[sizeof pbuf-1] = '\0';
#ifdef DEBUG
(void)printf("path = %s, uid = %u, gid = %u\n", pbuf, pcr->pcr_uid,
pcr->pcr_gid);
#endif
if (setegid(pcr->pcr_gid) < 0 ||
setgroups(pcr->pcr_ngroups, pcr->pcr_groups) < 0)
return (errno);
if (seteuid(pcr->pcr_uid) < 0)
return (errno);
error = 0;
fd = open(pbuf, O_RDWR|O_CREAT, 0666);
if (fd < 0) {
if (errno == EISDIR) {
errno = 0;
fd = open(pbuf, O_RDONLY);
}
if (fd < 0)
error = errno;
}
if (seteuid((uid_t) 0) < 0) { /* XXX - should reset gidset too */
error = errno;
syslog(LOG_ERR, "setcred: %m");
if (fd >= 0) {
(void)close(fd);
fd = -1;
}
}
if (error == 0)
*fdp = fd;
#ifdef DEBUG
(void)fprintf(stderr, "pt_file returns *fdp = %d, error = %d\n",
*fdp, error);
#endif
return (error);
}
|
