1#include <cap-ng.h>
 2#include <err.h>
 3#include <linux/capability.h>
 4#include <stdbool.h>
 5#include <string.h>
 6#include <stdio.h>
 7#include <sys/prctl.h>
 8#include <sys/auxv.h>
 9
 
 
10#ifndef PR_CAP_AMBIENT
11#define PR_CAP_AMBIENT			47
12# define PR_CAP_AMBIENT_IS_SET		1
13# define PR_CAP_AMBIENT_RAISE		2
14# define PR_CAP_AMBIENT_LOWER		3
15# define PR_CAP_AMBIENT_CLEAR_ALL	4
16#endif
17
18#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 19)
19# define HAVE_GETAUXVAL
20#endif
21
22static bool bool_arg(char **argv, int i)
23{
24	if (!strcmp(argv[i], "0"))
25		return false;
26	else if (!strcmp(argv[i], "1"))
27		return true;
28	else
29		errx(1, "wrong argv[%d]", i);
 
 
30}
31
32int main(int argc, char **argv)
33{
34	const char *atsec = "";
35
36	/*
37	 * Be careful just in case a setgid or setcapped copy of this
38	 * helper gets out.
39	 */
40
41	if (argc != 5)
42		errx(1, "wrong argc");
43
44#ifdef HAVE_GETAUXVAL
45	if (getauxval(AT_SECURE))
46		atsec = " (AT_SECURE is set)";
47	else
48		atsec = " (AT_SECURE is not set)";
49#endif
50
51	capng_get_caps_process();
52
53	if (capng_have_capability(CAPNG_EFFECTIVE, CAP_NET_BIND_SERVICE) != bool_arg(argv, 1)) {
54		printf("[FAIL]\tWrong effective state%s\n", atsec);
55		return 1;
56	}
 
57	if (capng_have_capability(CAPNG_PERMITTED, CAP_NET_BIND_SERVICE) != bool_arg(argv, 2)) {
58		printf("[FAIL]\tWrong permitted state%s\n", atsec);
59		return 1;
60	}
 
61	if (capng_have_capability(CAPNG_INHERITABLE, CAP_NET_BIND_SERVICE) != bool_arg(argv, 3)) {
62		printf("[FAIL]\tWrong inheritable state%s\n", atsec);
63		return 1;
64	}
65
66	if (prctl(PR_CAP_AMBIENT, PR_CAP_AMBIENT_IS_SET, CAP_NET_BIND_SERVICE, 0, 0, 0) != bool_arg(argv, 4)) {
67		printf("[FAIL]\tWrong ambient state%s\n", atsec);
68		return 1;
69	}
70
71	printf("[OK]\tCapabilities after execve were correct\n");
 
72	return 0;
73}

 1// SPDX-License-Identifier: GPL-2.0
 2#include <cap-ng.h>
 
 3#include <linux/capability.h>
 4#include <stdbool.h>
 5#include <string.h>
 6#include <stdio.h>
 7#include <sys/prctl.h>
 8#include <sys/auxv.h>
 9
10#include "../kselftest.h"
11
12#ifndef PR_CAP_AMBIENT
13#define PR_CAP_AMBIENT			47
14# define PR_CAP_AMBIENT_IS_SET		1
15# define PR_CAP_AMBIENT_RAISE		2
16# define PR_CAP_AMBIENT_LOWER		3
17# define PR_CAP_AMBIENT_CLEAR_ALL	4
18#endif
19
20#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 19)
21# define HAVE_GETAUXVAL
22#endif
23
24static bool bool_arg(char **argv, int i)
25{
26	if (!strcmp(argv[i], "0"))
27		return false;
28	else if (!strcmp(argv[i], "1"))
29		return true;
30	else {
31		ksft_exit_fail_msg("wrong argv[%d]\n", i);
32		return false;
33	}
34}
35
36int main(int argc, char **argv)
37{
38	const char *atsec = "";
39
40	/*
41	 * Be careful just in case a setgid or setcapped copy of this
42	 * helper gets out.
43	 */
44
45	if (argc != 5)
46		ksft_exit_fail_msg("wrong argc\n");
47
48#ifdef HAVE_GETAUXVAL
49	if (getauxval(AT_SECURE))
50		atsec = " (AT_SECURE is set)";
51	else
52		atsec = " (AT_SECURE is not set)";
53#endif
54
55	capng_get_caps_process();
56
57	if (capng_have_capability(CAPNG_EFFECTIVE, CAP_NET_BIND_SERVICE) != bool_arg(argv, 1)) {
58		ksft_print_msg("Wrong effective state%s\n", atsec);
59		return 1;
60	}
61
62	if (capng_have_capability(CAPNG_PERMITTED, CAP_NET_BIND_SERVICE) != bool_arg(argv, 2)) {
63		ksft_print_msg("Wrong permitted state%s\n", atsec);
64		return 1;
65	}
66
67	if (capng_have_capability(CAPNG_INHERITABLE, CAP_NET_BIND_SERVICE) != bool_arg(argv, 3)) {
68		ksft_print_msg("Wrong inheritable state%s\n", atsec);
69		return 1;
70	}
71
72	if (prctl(PR_CAP_AMBIENT, PR_CAP_AMBIENT_IS_SET, CAP_NET_BIND_SERVICE, 0, 0, 0) != bool_arg(argv, 4)) {
73		ksft_print_msg("Wrong ambient state%s\n", atsec);
74		return 1;
75	}
76
77	ksft_print_msg("%s: Capabilities after execve were correct\n",
78			"validate_cap:");
79	return 0;
80}