mbx_mbox.c
3.41 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
129
130
131
132
133
134
135
/* GNU mailutils - a suite of utilities for electronic mail
Copyright (C) 1999, 2000 Free Software Foundation, Inc.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU Library General Public License as published by
the Free Software Foundation; either version 2, 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 Library General Public License for more details.
You should have received a copy of the GNU Library General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
#include <mailbox0.h>
#include <registrar0.h>
#include <string.h>
#include <errno.h>
#include <sys/stat.h>
static int mailbox_mbox_init (mailbox_t *mbox, const char *name);
static void mailbox_mbox_destroy (mailbox_t *mbox);
struct mailbox_registrar _mailbox_mbox_registrar =
{
"UNIX_MBOX/Maildir/MMDF",
mailbox_mbox_init, mailbox_mbox_destroy
};
/*
Caveat there is no specific URL for file mailbox or simple path name,
<path_name>
file:<path_name>
It would be preferrable to use :
maildir:<path>
unix:<path>
mmdf:<path>
This would eliminate heuristic discovery that would turn
out to be wrong.
*/
static int
mailbox_mbox_init (mailbox_t *mbox, const char *name)
{
struct stat st;
size_t len;
if (name == NULL || mbox == NULL)
return EINVAL;
len = strlen (name);
if (len >= 5 &&
(name[0] == 'f' || name[0] == 'F') &&
(name[1] == 'i' || name[1] == 'I') &&
(name[2] == 'l' || name[2] == 'L') &&
(name[3] == 'e' || name[3] == 'E') &&
name[4] == ':')
{
name += 5;
}
/*
* If they want to creat ?? should they know the type ???
* What is the best course of action ??
* For the default is unix if the file does not exist.
*/
if (stat (name, &st) < 0)
return _mailbox_unix_registrar._init (mbox, name);
if (S_ISREG (st.st_mode))
{
/*
FIXME: We should do an open() and try
to do a better reconnaissance of the type,
maybe MMDF. For now assume Unix MBox */
#if 0
char head[6];
ssize_t cout;
int fd;
fd = open (name, O_RDONLY);
if (fd == -1)
{
/* Oops !! wrong permission ? file deleted ? */
return errno; /* errno set by open () */
}
/* Read a small chunck */
count = read (fd, head, sizeof(head));
/* Try Unix Mbox */
/* FIXME:
What happen if the file is empty ???
Do we default to Unix ??
*/
if (count == 0) /*empty file*/
{
close (fd);
return _mailbox_unix_registrar._init (mbox, name);
}
if (count >= 5)
{
if (strncmp (head, "From ", 5) == 0)
{
/* This is a Unix Mbox */
close (fd);
return _mailbox_unix_registrar._init (mbox, name);
}
}
/* Try MMDF */
close (fd);
#endif
return _mailbox_unix_registrar._init (mbox, name);
}
/* Is that true ? Are all directories Maildir ?? */
else if (S_ISDIR (st.st_mode))
return _mailbox_maildir_registrar._init (mbox, name);
/* Why can't a mailbox be FIFO ? or a DOOR/Portal ??? */
return EINVAL;
}
static void
mailbox_mbox_destroy (mailbox_t *pmbox)
{
if (pmbox && *pmbox)
_mailbox_unix_registrar._destroy (pmbox);
}