platform-tracing.c revision 323129 
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_PRIV_H
24#include <priv.h> /* For setpflags() and __PROC_PROTECT  */
25#endif
26#include <stdarg.h>
27
28#include "log.h"
29
30void
31platform_disable_tracing(int strict)
32{
33#if defined(HAVE_PRCTL) && defined(PR_SET_DUMPABLE)
34	/* Disable ptrace on Linux without sgid bit */
35	if (prctl(PR_SET_DUMPABLE, 0) != 0 && strict)
36		fatal("unable to make the process undumpable");
37#endif
38#if defined(HAVE_SETPFLAGS) && defined(__PROC_PROTECT)
39	/* On Solaris, we should make this process untraceable */
40	if (setpflags(__PROC_PROTECT, 1) != 0 && strict)
41		fatal("unable to make the process untraceable");
42#endif
43}
44