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
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
|
/* $OpenBSD: proc.h,v 1.8 2018/09/10 13:21:39 akoshibe Exp $ */
/*
* Copyright (c) 2010-2015 Reyk Floeter <reyk@openbsd.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 <imsg.h>
#include <event.h>
#include "types.h"
#ifndef _PROC_H
#define _PROC_H
struct control_sock {
const char *cs_name;
struct event cs_ev;
struct event cs_evt;
int cs_fd;
int cs_restricted;
void *cs_env;
TAILQ_ENTRY(control_sock) cs_entry;
};
TAILQ_HEAD(control_socks, control_sock);
struct privsep_pipes {
int *pp_pipes[PROC_MAX];
};
struct privsep {
struct privsep_pipes *ps_pipes[PROC_MAX];
struct privsep_pipes *ps_pp;
struct imsgev *ps_ievs[PROC_MAX];
const char *ps_title[PROC_MAX];
pid_t ps_pid[PROC_MAX];
struct passwd *ps_pw;
int ps_noaction;
struct control_sock ps_csock;
struct control_socks ps_rcsocks;
unsigned int ps_instances[PROC_MAX];
unsigned int ps_instance;
/* Event and signal handlers */
struct event ps_evsigint;
struct event ps_evsigterm;
struct event ps_evsigchld;
struct event ps_evsighup;
struct event ps_evsigpipe;
struct event ps_evsigusr1;
void *ps_env;
};
struct privsep_proc {
const char *p_title;
enum privsep_procid p_id;
int (*p_cb)(int, struct privsep_proc *,
struct imsg *);
void (*p_init)(struct privsep *,
struct privsep_proc *);
const char *p_chroot;
struct privsep *p_ps;
void (*p_shutdown)(void);
struct passwd *p_pw;
};
struct privsep_fd {
enum privsep_procid pf_procid;
unsigned int pf_instance;
};
struct imsgev {
struct imsgbuf ibuf;
void (*handler)(int, short, void *);
struct event ev;
struct privsep_proc *proc;
void *data;
short events;
const char *name;
};
#ifndef IMSG_DATA_SIZE
#define IMSG_DATA_SIZE(_imsg) ((_imsg)->hdr.len - IMSG_HEADER_SIZE)
#endif
#ifndef IMSG_SIZE_CHECK
#define IMSG_SIZE_CHECK(_imsg, _type) \
do { \
if (IMSG_DATA_SIZE(_imsg) < sizeof(*(_type))) \
fatal("received imsg size was wrong."); \
} while (0 /* CONSTCOND */)
#endif
#if DEBUG
#define DPRINTF log_debug
#else
#define DPRINTF(x...) do {} while(0)
#endif
#define PROC_PARENT_SOCK_FILENO 3
#define PROC_MAX_INSTANCES 32
struct ctl_conn {
TAILQ_ENTRY(ctl_conn) entry;
uint8_t flags;
#define CTL_CONN_NOTIFY 0x01
struct imsgev iev;
int restricted;
};
TAILQ_HEAD(ctl_connlist, ctl_conn);
extern struct ctl_connlist ctl_conns;
/* proc.c */
void proc_init(struct privsep *, struct privsep_proc *, unsigned int, int,
int, char **, enum privsep_procid);
void proc_kill(struct privsep *);
void proc_connect(struct privsep *ps);
void proc_dispatch(int, short event, void *);
void proc_run(struct privsep *, struct privsep_proc *,
struct privsep_proc *, unsigned int,
void (*)(struct privsep *, struct privsep_proc *, void *), void *);
void imsg_event_add(struct imsgev *);
int imsg_compose_event(struct imsgev *, uint16_t, uint32_t,
pid_t, int, void *, uint16_t);
int imsg_composev_event(struct imsgev *, uint16_t, uint32_t,
pid_t, int, const struct iovec *, int);
int proc_compose_imsg(struct privsep *, enum privsep_procid, int,
uint16_t, uint32_t, int, void *, uint16_t);
int proc_compose(struct privsep *, enum privsep_procid,
uint16_t, void *data, uint16_t);
int proc_composev_imsg(struct privsep *, enum privsep_procid, int,
uint16_t, uint32_t, int, const struct iovec *, int);
int proc_composev(struct privsep *, enum privsep_procid,
uint16_t, const struct iovec *, int);
int proc_forward_imsg(struct privsep *, struct imsg *,
enum privsep_procid, int);
struct imsgbuf *
proc_ibuf(struct privsep *, enum privsep_procid, int);
struct imsgev *
proc_iev(struct privsep *, enum privsep_procid, int);
enum privsep_procid
proc_getid(struct privsep_proc *, unsigned int, const char *);
int proc_flush_imsg(struct privsep *, enum privsep_procid, int);
/* control.c */
int control_init(struct privsep *, struct control_sock *);
int control_listen(struct control_sock *);
struct ctl_conn
*control_connbyfd(int);
void control(struct privsep *, struct privsep_proc *);
/* log.c */
void log_init(int, int);
void log_procinit(const char *);
void log_setverbose(int);
int log_getverbose(void);
void log_warn(const char *, ...)
__attribute__((__format__ (printf, 1, 2)));
void log_warnx(const char *, ...)
__attribute__((__format__ (printf, 1, 2)));
void log_info(const char *, ...)
__attribute__((__format__ (printf, 1, 2)));
void log_debug(const char *, ...)
__attribute__((__format__ (printf, 1, 2)));
void logit(int, const char *, ...)
__attribute__((__format__ (printf, 2, 3)));
void vlog(int, const char *, va_list)
__attribute__((__format__ (printf, 2, 0)));
__dead void fatal(const char *, ...)
__attribute__((__format__ (printf, 1, 2)));
__dead void fatalx(const char *, ...)
__attribute__((__format__ (printf, 1, 2)));
void socket_set_blockmode(int, enum blockmodes);
#endif /* _PROC_H */
|
