1 /*
2 * Copyright (c) 2012 The Chromium OS Authors.
3 *
4 * Based on:
5 * http://bazaar.launchpad.net/~ubuntu-bugcontrol/qa-regression-testing/master/view/head:/scripts/kernel-security/ptrace/sleeper.c
6 * Copyright 2010 Canonical, Ltd
7 * License: GPLv3
8 * Author: Kees Cook <kees.cook@canonical.com>
9 */
10 #define _GNU_SOURCE
11 #include <stdio.h>
12 #include <stdlib.h>
13 #include <unistd.h>
14 #include <stdint.h>
15 #include <string.h>
16 #include <stdint.h>
17 #include <stddef.h>
18 #include <inttypes.h>
19 #include <sys/types.h>
20 #include <sys/stat.h>
21 #include <fcntl.h>
22 #include <sys/prctl.h>
23 #include <signal.h>
24
25 #ifndef PR_SET_PTRACER
26 # define PR_SET_PTRACER 0x59616d61
27 #endif
28
main(int argc,char * argv[])29 int main(int argc, char * argv[])
30 {
31 long pid;
32
33 if (argc<3) {
34 fprintf(stderr,"Usage: %s TRACER_PID SLEEP_SECONDS\n", argv[0]);
35 /* Without arguments, send a SIGINT to ourself so that gdb can
36 * regain control without needing debugging symbols.
37 */
38 kill(getpid(), SIGINT);
39 return 1;
40 }
41
42 pid = strtol(argv[1], NULL, 10);
43 if (pid != -2) {
44 if (prctl(PR_SET_PTRACER, pid, 0, 0, 0)) {
45 perror("prctl");
46 puts("failed");
47 return 1;
48 }
49 }
50
51 puts("ready");
52 fflush(NULL);
53 sleep(atoi(argv[2]));
54
55 return 0;
56 }
57