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
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
|
/*-
* Copyright (c) 2016 The FreeBSD Foundation
* All rights reserved.
*
* This software was developed by Konstantin Belousov <kib@FreeBSD.org>
* under sponsorship from the FreeBSD Foundation.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/procctl.h>
#include <err.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
enum {
MODE_ASLR,
MODE_INVALID,
MODE_TRACE,
MODE_TRAPCAP,
};
static pid_t
str2pid(const char *str)
{
pid_t res;
char *tail;
res = strtol(str, &tail, 0);
if (*tail != '\0') {
warnx("non-numeric pid");
return (-1);
}
return (res);
}
static void __dead2
usage(void)
{
fprintf(stderr, "Usage: proccontrol -m (aslr|trace|trapcap) [-q] "
"[-s (enable|disable)] [-p pid | command]\n");
exit(1);
}
int
main(int argc, char *argv[])
{
int arg, ch, error, mode;
pid_t pid;
bool enable, do_command, query;
mode = MODE_INVALID;
enable = true;
pid = -1;
query = false;
while ((ch = getopt(argc, argv, "m:qs:p:")) != -1) {
switch (ch) {
case 'm':
if (strcmp(optarg, "aslr") == 0)
mode = MODE_ASLR;
else if (strcmp(optarg, "trace") == 0)
mode = MODE_TRACE;
else if (strcmp(optarg, "trapcap") == 0)
mode = MODE_TRAPCAP;
else
usage();
break;
case 's':
if (strcmp(optarg, "enable") == 0)
enable = true;
else if (strcmp(optarg, "disable") == 0)
enable = false;
else
usage();
break;
case 'p':
pid = str2pid(optarg);
break;
case 'q':
query = true;
break;
case '?':
default:
usage();
break;
}
}
argc -= optind;
argv += optind;
do_command = argc != 0;
if (do_command) {
if (pid != -1 || query)
usage();
pid = getpid();
} else if (pid == -1) {
pid = getpid();
}
if (query) {
switch (mode) {
case MODE_ASLR:
error = procctl(P_PID, pid, PROC_ASLR_STATUS, &arg);
break;
case MODE_TRACE:
error = procctl(P_PID, pid, PROC_TRACE_STATUS, &arg);
break;
case MODE_TRAPCAP:
error = procctl(P_PID, pid, PROC_TRAPCAP_STATUS, &arg);
break;
default:
usage();
break;
}
if (error != 0)
err(1, "procctl status");
switch (mode) {
case MODE_ASLR:
switch (arg & ~PROC_ASLR_ACTIVE) {
case PROC_ASLR_FORCE_ENABLE:
printf("force enabled");
break;
case PROC_ASLR_FORCE_DISABLE:
printf("force disabled");
break;
case PROC_ASLR_NOFORCE:
printf("not forced");
break;
}
if ((arg & PROC_ASLR_ACTIVE) != 0)
printf(", active\n");
else
printf(", not active\n");
break;
case MODE_TRACE:
if (arg == -1)
printf("disabled\n");
else if (arg == 0)
printf("enabled, no debugger\n");
else
printf("enabled, traced by %d\n", arg);
break;
case MODE_TRAPCAP:
switch (arg) {
case PROC_TRAPCAP_CTL_ENABLE:
printf("enabled\n");
break;
case PROC_TRAPCAP_CTL_DISABLE:
printf("disabled\n");
break;
}
break;
}
} else {
switch (mode) {
case MODE_ASLR:
arg = enable ? PROC_ASLR_FORCE_ENABLE :
PROC_ASLR_FORCE_DISABLE;
error = procctl(P_PID, pid, PROC_ASLR_CTL, &arg);
break;
case MODE_TRACE:
arg = enable ? PROC_TRACE_CTL_ENABLE :
PROC_TRACE_CTL_DISABLE;
error = procctl(P_PID, pid, PROC_TRACE_CTL, &arg);
break;
case MODE_TRAPCAP:
arg = enable ? PROC_TRAPCAP_CTL_ENABLE :
PROC_TRAPCAP_CTL_DISABLE;
error = procctl(P_PID, pid, PROC_TRAPCAP_CTL, &arg);
break;
default:
usage();
break;
}
if (error != 0)
err(1, "procctl ctl");
if (do_command) {
error = execvp(argv[0], argv);
err(1, "exec");
}
}
exit(0);
}
|
