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
|
/*
* Copyright (c) 2004, Stefan Walter
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* * Redistributions of source code must retain the above
* copyright notice, this list of conditions and the
* following disclaimer.
* * 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.
* * The names of contributors to this software may not be
* used to endorse or promote products derived from this
* software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS 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
* COPYRIGHT OWNER 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.
*
*
* CONTRIBUTORS
* Stef Walter <stef@memberwebs.com>
*
*/
#include <sys/types.h>
#include <sys/param.h>
#include <sys/sysctl.h>
#include <sys/user.h>
#include <sys/jail.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <fcntl.h>
#include <kvm.h>
#include <paths.h>
#include <limits.h>
#include <err.h>
#include "util.h"
#ifdef HAVE_CONFIG_H
#include "../config.h"
#endif
static void usage();
static void print_jail_ids();
static void run_jail_ps(int argc, char* argv[]);
int main(int argc, char* argv[])
{
struct xprison* xp = NULL;
jails jls;
size_t len;
int jid, ch = 0;
int simple = 0;
while((ch = getopt(argc, argv, "i")) != -1)
{
switch(ch)
{
case 'i':
simple = 1;
break;
case '?':
default:
usage();
}
}
argc -= optind;
argv += optind;
/* Make sure we have a jail name or id */
if(argc == 0)
usage();
if(running_in_jail() != 0)
errx(1, "can't run from inside jail");
/* Translate the jail name into an id if neccessary */
jails_load(&jls);
xp = jails_find(&jls, argv[0]);
if(xp == NULL)
errx(1, "unknown jail host name: %s", argv[0]);
argc--;
argv++;
/* This makes sure we can use kvm funcs in jail */
kvm_prepare_jail(xp);
jid = xp->pr_id;
/* Always free jail info before going into jail */
jails_done(&jls);
/* Go into the jail */
if(jail_attach(jid) == -1)
err(1, "couldn't attach to jail");
if(simple)
{
if(argc > 0)
usage();
print_jail_ids();
}
else
{
/* This function never returns */
run_jail_ps(argc, argv);
}
return 0;
}
static void usage()
{
fprintf(stderr, "usage: jps [-i] jail [ ps_options ... ]\n");
exit(2);
}
static void run_jail_ps(int argc, char* argv[])
{
char** args;
int i;
if(!check_jail_command(NULL, "/bin/ps"))
exit(1);
/*
* TODO: We need to purge down the environment here.
* If the jail is in any way malicious or compromised
* then it could have replaced /bin/ps which we run...
*/
args = (char**)alloca(sizeof(char*) * (argc + 2));
args[0] = "ps";
for(i = 0; i < argc; i++)
args[i + 1] = argv[i];
args[i + 1] = NULL;
run_jail_command(NULL, "/bin/ps", args, JAIL_RUN_NOFORK);
}
static void print_jail_ids()
{
kvm_t* kd;
int nentries, i;
struct kinfo_proc* kp;
char errbuf[_POSIX2_LINE_MAX];
/* Open kernel interface */
kd = kvm_openfiles(_PATH_DEVNULL, _PATH_DEVNULL, NULL, O_RDONLY, errbuf);
if(kd == NULL)
errx(1, "couldn't connect to kernel: %s", errbuf);
/* Get all processes and print the pids */
if((kp = kvm_getprocs(kd, KERN_PROC_ALL, 0, &nentries)) == 0)
errx(1, "couldn't list processes: %s", kvm_geterr(kd));
for(i = 0; i < nentries; i++)
{
if(kp[i].ki_pid != getpid())
printf("%d ", (int)(kp[i].ki_pid));
}
fputc('\n', stdout);
kvm_close(kd);
}
|
