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
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
/* $Id$ */
/*
* Copyright (c) 2006 Nicholas Marriott <nicholas.marriott@gmail.com>
*
* 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 MIND, 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/socket.h>
#include <sys/wait.h>
#include <fcntl.h>
#include <paths.h>
#include <string.h>
#include <unistd.h>
#include "fdm.h"
#include "deliver.h"
#include "match.h"
void parent_fetch_error(struct child *, struct msg *);
void parent_fetch_action(struct child *, struct children *,
struct deliver_ctx *, struct msg *);
void parent_fetch_cmd(struct child *, struct children *, struct mail_ctx *,
struct msg *);
int
parent_fetch(struct child *child, struct msg *msg, struct msgbuf *msgbuf)
{
struct child_fetch_data *data = child->data;
struct children *children = data->children;
struct deliver_ctx *dctx;
struct mail_ctx *mctx;
struct mail *m;
switch (msg->type) {
case MSG_ACTION:
if (msgbuf->buf == NULL || msgbuf->len == 0)
fatalx("bad tags");
m = xcalloc(1, sizeof *m);
if (mail_receive(m, msg, 0) != 0) {
log_warn("parent: can't receive mail");
parent_fetch_error(child, msg);
break;
}
m->tags = msgbuf->buf;
dctx = xcalloc(1, sizeof *dctx);
dctx->account = msg->data.account;
dctx->mail = m;
parent_fetch_action(child, children, dctx, msg);
break;
case MSG_COMMAND:
if (msgbuf->buf == NULL || msgbuf->len == 0)
fatalx("bad tags");
m = xcalloc(1, sizeof *m);
if (mail_receive(m, msg, 0) != 0) {
log_warn("parent: can't receive mail");
parent_fetch_error(child, msg);
break;
}
m->tags = msgbuf->buf;
mctx = xcalloc(1, sizeof *mctx);
mctx->account = msg->data.account;
mctx->mail = m;
parent_fetch_cmd(child, children, mctx, msg);
break;
case MSG_DONE:
fatalx("unexpected message");
case MSG_EXIT:
return (-1);
}
return (0);
}
void
parent_fetch_error(struct child *child, struct msg *msg)
{
msg->type = MSG_DONE;
msg->data.error = DELIVER_FAILURE;
if (privsep_send(child->io, msg, NULL) != 0)
fatalx("privsep_send error");
}
void
parent_fetch_action(struct child *child, struct children *children,
struct deliver_ctx *dctx, struct msg *msg)
{
struct actitem *ti = msg->data.actitem;
struct mail *m = dctx->mail;
struct mail *md = &dctx->wr_mail;
struct child_deliver_data *data;
uid_t uid = msg->data.uid;
gid_t gid = msg->data.gid;
memset(md, 0, sizeof *md);
/*
* If writing back, open a new mail now and set its ownership so it
* can be accessed by the child.
*/
if (ti->deliver->type == DELIVER_WRBACK) {
if (mail_open(md, IO_BLOCKSIZE) != 0) {
log_warn("parent: failed to create mail");
parent_fetch_error(child, msg);
return;
}
if (geteuid() == 0 &&
shm_owner(&md->shm, conf.child_uid, conf.child_gid) != 0) {
mail_destroy(md);
log_warn("parent: failed to set mail ownership");
parent_fetch_error(child, msg);
return;
}
md->decision = m->decision;
}
data = xmalloc(sizeof *data);
data->child = child;
data->msgid = msg->id;
data->account = dctx->account;
data->hook = child_deliver_action_hook;
data->actitem = ti;
data->dctx = dctx;
data->mail = m;
data->name = "deliver";
data->uid = uid;
data->gid = gid;
child = child_start(
children, uid, gid, child_deliver, parent_deliver, data, child);
log_debug3("parent: deliver "
"child %ld started (uid %lu)", (long) child->pid, (u_long) uid);
}
void
parent_fetch_cmd(struct child *child, struct children *children,
struct mail_ctx *mctx, struct msg *msg)
{
struct mail *m = mctx->mail;
struct child_deliver_data *data;
uid_t uid = msg->data.uid;
gid_t gid = msg->data.gid;
data = xmalloc(sizeof *data);
data->child = child;
data->msgid = msg->id;
data->account = mctx->account;
data->hook = child_deliver_cmd_hook;
data->mctx = mctx;
data->cmddata = msg->data.cmddata;
data->mail = m;
data->name = "command";
data->uid = uid;
data->gid = gid;
child = child_start(
children, uid, gid, child_deliver, parent_deliver, data, child);
log_debug3("parent: command "
"child %ld started (uid %lu)", (long) child->pid, (u_long) uid);
}
|
