/*-
 * Copyright (c) 2012 The FreeBSD Foundation
 *
 * This software was developed by Pawel Jakub Dawidek under sponsorship from
 * the FreeBSD Foundation.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE AUTHORS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHORS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#include <sys/types.h>
#include <sys/capsicum.h>
#include <sys/procdesc.h>
#include <sys/wait.h>

#include <err.h>
#include <errno.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>

#include "misc.h"

int
main(void)
{
        unsigned int mode;
        pid_t pid;
        int pfd;

        printf("1..27\n");

        mode = 666;
        CHECK(cap_getmode(&mode) == 0);
        /* If cap_getmode() succeeded mode should be modified. */
        CHECK(mode != 666);
        /* We are not in capability mode. */
        CHECK(mode == 0);

        /* Expect EFAULT. */
        errno = 0;
        CHECK(cap_getmode(NULL) == -1);
        CHECK(errno == EFAULT);
        errno = 0;
        CHECK(cap_getmode((void *)(uintptr_t)0xdeadc0de) == -1);
        CHECK(errno == EFAULT);

        /* If parent is not in capability mode, child after fork() also won't be. */
        pid = fork();
        switch (pid) {
        case -1:
                err(1, "fork() failed");
        case 0:
                mode = 666;
                CHECK(cap_getmode(&mode) == 0);
                /* If cap_getmode() succeeded mode should be modified. */
                CHECK(mode != 666);
                /* We are not in capability mode. */
                CHECK(mode == 0);
                exit(0);
        default:
                if (waitpid(pid, NULL, 0) == -1)
                        err(1, "waitpid() failed");
        }

        /* If parent is not in capability mode, child after pdfork() also won't be. */
        pid = pdfork(&pfd, 0);
        switch (pid) {
        case -1:
                err(1, "pdfork() failed");
        case 0:
                mode = 666;
                CHECK(cap_getmode(&mode) == 0);
                /* If cap_getmode() succeeded mode should be modified. */
                CHECK(mode != 666);
                /* We are not in capability mode. */
                CHECK(mode == 0);
                exit(0);
        default:
                if (pdwait(pfd) == -1)
                        err(1, "pdwait() failed");
                close(pfd);
        }

        /* In capability mode... */

        CHECK(cap_enter() == 0);

        mode = 666;
        CHECK(cap_getmode(&mode) == 0);
        /* If cap_getmode() succeeded mode should be modified. */
        CHECK(mode != 666);
        /* We are in capability mode. */
        CHECK(mode == 1);

        /* Expect EFAULT. */
        errno = 0;
        CHECK(cap_getmode(NULL) == -1);
        CHECK(errno == EFAULT);
        errno = 0;
        CHECK(cap_getmode((void *)(uintptr_t)0xdeadc0de) == -1);
        CHECK(errno == EFAULT);

        /* If parent is in capability mode, child after fork() also will be. */
        pid = fork();
        switch (pid) {
        case -1:
                err(1, "fork() failed");
        case 0:
                mode = 666;
                CHECK(cap_getmode(&mode) == 0);
                /* If cap_getmode() succeeded mode should be modified. */
                CHECK(mode != 666);
                /* We are in capability mode. */
                CHECK(mode == 1);
                exit(0);
        default:
                /*
                 * wait(2) and friends are not permitted in the capability mode,
                 * so we can only just wait for a while.
                 */
                sleep(1);
        }

        /* If parent is in capability mode, child after pdfork() also will be. */
        pid = pdfork(&pfd, 0);
        switch (pid) {
        case -1:
                err(1, "pdfork() failed");
        case 0:
                mode = 666;
                CHECK(cap_getmode(&mode) == 0);
                /* If cap_getmode() succeeded mode should be modified. */
                CHECK(mode != 666);
                /* We are in capability mode. */
                CHECK(mode == 1);
                exit(0);
        default:
                if (pdwait(pfd) == -1)
                        err(1, "pdwait() failed");
                close(pfd);
        }

        exit(0);
}