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
136
137
138
139
140
141
142
143
144
145
146
147
148
|
/* $OpenBSD: delivery_maildir.c,v 1.15 2014/05/10 21:50:40 chl Exp $ */
/*
* Copyright (c) 2011 Gilles Chehade <gilles@poolp.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#include <sys/types.h>
#include <sys/queue.h>
#include <sys/tree.h>
#include <sys/socket.h>
#include <sys/stat.h>
#include <ctype.h>
#include <err.h>
#include <errno.h>
#include <event.h>
#include <fcntl.h>
#include <imsg.h>
#include <paths.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <time.h>
#include <unistd.h>
#include "smtpd.h"
#include "log.h"
extern char **environ;
/* maildir backend */
static void delivery_maildir_open(struct deliver *);
static int mailaddr_tag(const struct mailaddr *, char *, size_t);
struct delivery_backend delivery_backend_maildir = {
1, delivery_maildir_open
};
static int
mailaddr_tag(const struct mailaddr *maddr, char *dest, size_t len)
{
char *tag;
char *sanitized;
if ((tag = strchr(maddr->user, TAG_CHAR))) {
tag++;
while (*tag == '.')
tag++;
}
if (tag == NULL)
return 1;
if (strlcpy(dest, tag, len) >= len)
return 0;
for (sanitized = dest; *sanitized; sanitized++)
if (strchr(MAILADDR_ESCAPE, *sanitized))
*sanitized = ':';
return 1;
}
static void
delivery_maildir_open(struct deliver *deliver)
{
char tmp[SMTPD_MAXPATHLEN], new[SMTPD_MAXPATHLEN], tag[SMTPD_MAXPATHLEN];
int ch, fd;
FILE *fp;
char *msg;
int n;
const char *chd;
struct mailaddr maddr;
struct stat sb;
#define error(m) { msg = m; goto err; }
#define error2(m) { msg = m; goto err2; }
setproctitle("maildir delivery");
memset(&maddr, 0, sizeof maddr);
if (! text_to_mailaddr(&maddr, deliver->dest))
error("cannot parse destination address");
memset(tag, 0, sizeof tag);
if (! mailaddr_tag(&maddr, tag, sizeof tag))
error("cannot extract tag from destination address");
if (mkdirs(deliver->to, 0700) < 0 && errno != EEXIST)
error("cannot mkdir maildir");
chd = deliver->to;
if (tag[0]) {
(void)snprintf(tmp, sizeof tmp, "%s/.%s", deliver->to, tag);
if (stat(tmp, &sb) != -1)
chd = tmp;
}
if (chdir(chd) < 0)
error("cannot cd to maildir");
if (mkdir("cur", 0700) < 0 && errno != EEXIST)
error("mkdir cur failed");
if (mkdir("tmp", 0700) < 0 && errno != EEXIST)
error("mkdir tmp failed");
if (mkdir("new", 0700) < 0 && errno != EEXIST)
error("mkdir new failed");
(void)snprintf(tmp, sizeof tmp, "tmp/%lld.%d.%s",
(long long int) time(NULL),
getpid(), env->sc_hostname);
fd = open(tmp, O_CREAT | O_EXCL | O_WRONLY, 0600);
if (fd < 0)
error("cannot open tmp file");
fp = fdopen(fd, "w");
if (fp == NULL)
error2("fdopen");
while ((ch = getc(stdin)) != EOF)
if (putc(ch, fp) == EOF)
break;
if (ferror(stdin))
error2("read error");
if (fflush(fp) == EOF || ferror(fp))
error2("write error");
if (fsync(fd) < 0)
error2("fsync");
if (fclose(fp) == EOF)
error2("fclose");
(void)snprintf(new, sizeof new, "new/%s", tmp + 4);
if (rename(tmp, new) < 0)
error2("cannot rename tmp->new");
_exit(0);
err2:
n = errno;
unlink(tmp);
errno = n;
err:
perror(msg);
_exit(1);
}
|
