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
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
|
/*
* DCAP - dCache Access Protocol client interface
*
* Copyright (C) 2000,2004 DESY Hamburg DMG-Division.
*
* AUTHOR: Tigran Mkrtchayn (tigran.mkrtchyan@desy.de)
*
* This program can be distributed under the terms of the GNU LGPL.
* See the file COPYING.LIB
*
*/
/*
* $Id: dcap_access.c,v 1.3 2004-11-01 19:33:29 tigran Exp $
*/
#include "dcap.h"
/**
* faked access system call, based on stat.
*/
#ifndef WIN32
int
dc_access(const char *path, int mode)
{
int rc;
struct stat sbuf;
uid_t uid;
gid_t gid;
int isOwner = 0;
int isGroup = 0;
int result = 0;
rc = dc_stat(path, &sbuf);
if( rc == 0 ) {
if( mode == F_OK ) {
return 0;
}
uid = geteuid();
gid = getegid();
if( uid == sbuf.st_uid ) {
isOwner = 1;
}
if( gid == sbuf.st_gid ) {
isGroup = 1;
}
rc = 0;
result = 1;
if( (mode & R_OK) == R_OK ) {
if( isOwner ) {
rc |= sbuf.st_mode & S_IRUSR;
}
if( isGroup ) {
rc |= sbuf.st_mode & S_IRGRP;
}
rc |= sbuf.st_mode & S_IROTH;
result &= rc != 0 ? 1 : 0;
}
if( (mode & W_OK) == W_OK ) {
if( isOwner ) {
rc |= sbuf.st_mode & S_IWUSR;
}
if( isGroup ) {
rc |= sbuf.st_mode & S_IWGRP;
}
rc |= sbuf.st_mode & S_IWOTH;
result &= rc != 0 ? 1 : 0;
}
if( (mode & X_OK) == X_OK ) {
if( isOwner ) {
rc |= sbuf.st_mode & S_IXUSR;
}
if( isGroup ) {
rc |= sbuf.st_mode & S_IXGRP;
}
rc |= sbuf.st_mode & S_IXOTH;
result &= rc != 0 ? 1 : 0;
}
}
rc = result == 0 ? -1 : 0;
return rc;
}
#else
int
dc_access(const char *path, int mode)
{
int rc;
struct stat sbuf;
rc = dc_stat(path, &sbuf);
return rc;
}
#endif
|
