// SPDX-License-Identifier: GPL-2.0
#include <cap-ng.h>
#include <linux/capability.h>
#include <stdbool.h>
#include <string.h>
#include <stdio.h>
#include <sys/prctl.h>
#include <sys/auxv.h>

#include "kselftest.h"

#if __GLIBC__ > 2 || (__GLIBC__ == 2 && __GLIBC_MINOR__ >= 19)
# define HAVE_GETAUXVAL
#endif

static bool bool_arg(char **argv, int i)
{
        if (!strcmp(argv[i], "0"))
                return false;
        else if (!strcmp(argv[i], "1"))
                return true;
        else {
                ksft_exit_fail_msg("wrong argv[%d]\n", i);
                return false;
        }
}

int main(int argc, char **argv)
{
        const char *atsec = "";
        int ret;

        /*
         * Be careful just in case a setgid or setcapped copy of this
         * helper gets out.
         */

        if (argc != 5)
                ksft_exit_fail_msg("wrong argc\n");

#ifdef HAVE_GETAUXVAL
        if (getauxval(AT_SECURE))
                atsec = " (AT_SECURE is set)";
        else
                atsec = " (AT_SECURE is not set)";
#endif

        ret = capng_get_caps_process();
        if (ret == -1) {
                ksft_print_msg("capng_get_caps_process failed\n");
                return 1;
        }

        if (capng_have_capability(CAPNG_EFFECTIVE, CAP_NET_BIND_SERVICE) != bool_arg(argv, 1)) {
                ksft_print_msg("Wrong effective state%s\n", atsec);
                return 1;
        }

        if (capng_have_capability(CAPNG_PERMITTED, CAP_NET_BIND_SERVICE) != bool_arg(argv, 2)) {
                ksft_print_msg("Wrong permitted state%s\n", atsec);
                return 1;
        }

        if (capng_have_capability(CAPNG_INHERITABLE, CAP_NET_BIND_SERVICE) != bool_arg(argv, 3)) {
                ksft_print_msg("Wrong inheritable state%s\n", atsec);
                return 1;
        }

        if (prctl(PR_CAP_AMBIENT, PR_CAP_AMBIENT_IS_SET, CAP_NET_BIND_SERVICE, 0, 0, 0) != bool_arg(argv, 4)) {
                ksft_print_msg("Wrong ambient state%s\n", atsec);
                return 1;
        }

        ksft_print_msg("%s: Capabilities after execve were correct\n",
                        "validate_cap:");
        return 0;
}