platform-tracing.c revision 323134 
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
33void
34platform_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