permstr.c
2.57 KB
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
125
126
127
128
/* GNU Mailutils -- a suite of utilities for electronic mail
Copyright (C) 2008, 2010 Free Software Foundation, Inc.
This library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 3 of the License, or (at your option) any later version.
This library 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
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General
Public License along with this library; if not, write to the
Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
Boston, MA 02110-1301 USA */
#if HAVE_CONFIG_H
# include <config.h>
#endif
#include <mailutils/stream.h>
#include <mailutils/mutil.h>
#include <mailutils/errno.h>
#define FILE_PERM_READ 0x1
#define FILE_PERM_WRITE 0x2
static int
parse_perm_bits (int *pmode, const char *str, const char **endp)
{
switch (*str)
{
case '+':
case '=':
str++;
break;
default:
if (endp)
*endp = str;
return 1;
}
for (; *str; str++)
{
switch (*str)
{
case 'r':
*pmode |= FILE_PERM_READ;
break;
case 'w':
*pmode |= FILE_PERM_WRITE;
break;
case ',':
if (endp)
*endp = str;
return 0;
default:
if (endp)
*endp = str;
return 1;
}
}
if (endp)
*endp = str;
return 0;
}
/* Parse a MU stream permission specification in form:
g(+|=)[wr]+,o(+|=)[wr]+
Return 0 on success.
On failure, return MU_ERR_FAILURE and point endp to the offending character.
*/
int
mu_parse_stream_perm_string (int *pmode, const char *str, const char **endp)
{
int mode = 0;
int f;
while (*str)
{
switch (*str)
{
case 'g':
if (parse_perm_bits (&f, str + 1, &str))
{
if (endp)
*endp = str;
return MU_ERR_FAILURE;
}
if (f & FILE_PERM_READ)
mode |= MU_STREAM_IRGRP;
if (f & FILE_PERM_WRITE)
mode |= MU_STREAM_IWGRP;
break;
case 'o':
if (parse_perm_bits (&f, str + 1, &str))
{
if (endp)
*endp = str;
return MU_ERR_FAILURE;
}
if (f & FILE_PERM_READ)
mode |= MU_STREAM_IROTH;
if (f & FILE_PERM_WRITE)
mode |= MU_STREAM_IWOTH;
break;
default:
if (endp)
*endp = str;
return MU_ERR_FAILURE;
}
if (*str == ',')
str++;
}
*pmode = mode;
if (endp)
*endp = str;
return 0;
}