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 #ifdef HAVE_SYS_PROCCTL_H 21 #include <sys/procctl.h> 22 #endif 23 #if defined(HAVE_SYS_PRCTL_H) 24 #include <sys/prctl.h> /* For prctl() and PR_SET_DUMPABLE */ 25 #endif 26 #ifdef HAVE_SYS_PTRACE_H 27 #include <sys/ptrace.h> 28 #endif 29 #ifdef HAVE_PRIV_H 30 #include <priv.h> /* For setpflags() and __PROC_PROTECT */ 31 #endif 32 #include <stdarg.h> 33 #include <unistd.h> 34 35 #include "log.h" 36 37 void 38 platform_disable_tracing(int strict) 39 { 40 #if defined(HAVE_PROCCTL) && defined(PROC_TRACE_CTL) 41 /* On FreeBSD, we should make this process untraceable */ 42 int disable_trace = PROC_TRACE_CTL_DISABLE; 43 44 if (procctl(P_PID, getpid(), PROC_TRACE_CTL, &disable_trace) && strict) 45 fatal("unable to make the process untraceable"); 46 #endif 47 #if defined(HAVE_PRCTL) && defined(PR_SET_DUMPABLE) 48 /* Disable ptrace on Linux without sgid bit */ 49 if (prctl(PR_SET_DUMPABLE, 0) != 0 && strict) 50 fatal("unable to make the process undumpable"); 51 #endif 52 #if defined(HAVE_SETPFLAGS) && defined(__PROC_PROTECT) 53 /* On Solaris, we should make this process untraceable */ 54 if (setpflags(__PROC_PROTECT, 1) != 0 && strict) 55 fatal("unable to make the process untraceable"); 56 #endif 57 #ifdef PT_DENY_ATTACH 58 /* Mac OS X */ 59 if (ptrace(PT_DENY_ATTACH, 0, 0, 0) == -1 && strict) 60 fatal("unable to set PT_DENY_ATTACH"); 61 #endif 62 } 63