1 /*
2 * Copyright (c) 2016 Darren Tucker. All rights reserved.
3 *
4 * Permission to use, copy, modify, and distribute this software for any
5 * purpose with or without fee is hereby granted, provided that the above
6 * copyright notice and this permission notice appear in all copies.
7 *
8 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
9 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
10 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
11 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
12 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
13 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
14 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
15 */
16
17 #include "includes.h"
18
19 #include <sys/types.h>
20 #if defined(HAVE_SYS_PRCTL_H)
21 #include <sys/prctl.h> /* For prctl() and PR_SET_DUMPABLE */
22 #endif
23 #ifdef HAVE_SYS_PTRACE_H
24 #include <sys/ptrace.h>
25 #endif
26 #ifdef HAVE_PRIV_H
27 #include <priv.h> /* For setpflags() and __PROC_PROTECT */
28 #endif
29 #include <stdarg.h>
30
31 #include "log.h"
32
33 void
platform_disable_tracing(int strict)34 platform_disable_tracing(int strict)
35 {
36 #if defined(HAVE_PRCTL) && defined(PR_SET_DUMPABLE)
37 /* Disable ptrace on Linux without sgid bit */
38 if (prctl(PR_SET_DUMPABLE, 0) != 0 && strict)
39 fatal("unable to make the process undumpable");
40 #endif
41 #if defined(HAVE_SETPFLAGS) && defined(__PROC_PROTECT)
42 /* On Solaris, we should make this process untraceable */
43 if (setpflags(__PROC_PROTECT, 1) != 0 && strict)
44 fatal("unable to make the process untraceable");
45 #endif
46 #ifdef PT_DENY_ATTACH
47 /* Mac OS X */
48 if (ptrace(PT_DENY_ATTACH, 0, 0, 0) == -1 && strict)
49 fatal("unable to set PT_DENY_ATTACH");
50 #endif
51 }
52