/* $NetBSD: t_proc2.c,v 1.3 2017/01/13 21:30:41 christos Exp $ */

/*-
* Copyright (c) 2008 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundation
* by Peter Werner <[email protected]>.
*
* 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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/cdefs.h>
__COPYRIGHT("@(#) Copyright (c) 2008\
The NetBSD Foundation, inc. All rights reserved.");
__RCSID("$NetBSD: t_proc2.c,v 1.3 2017/01/13 21:30:41 christos Exp $");

#include <sys/event.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>

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

#include <atf-c.h>

#include "h_macros.h"

static void
child_two(void)
{
       _exit(EXIT_SUCCESS);
}

static void
child_one(void)
{
       pid_t pid;
       struct passwd *pwd;
       const char *nam = "nobody";

       pwd = getpwnam(nam);
       if (pwd == NULL)
               err(EXIT_FAILURE, "getpwnam(\"%s\")", nam);

       if ((setuid(pwd->pw_uid)) == -1)
               err(EXIT_FAILURE, "setuid(%d)", pwd->pw_uid);

       pid = fork();
       if (pid == -1)
               err(EXIT_FAILURE, "fork()");

       if (pid == 0)
               child_two();

       _exit(EXIT_SUCCESS);
}

ATF_TC(proc2);
ATF_TC_HEAD(proc2, tc)
{
       atf_tc_set_md_var(tc, "require.user", "root");
       atf_tc_set_md_var(tc, "descr",
           "Checks EVFILT_PROC for NOTE_FORK|NOTE_TRACK error path problem "
           "fixed in rev. 1.1.1.1.2.17 of sys/kern/kern_event.c");
}
ATF_TC_BODY(proc2, tc)
{
       pid_t pid = 0;
       int kq, status;
       struct kevent ke;
       struct timespec timeout;

       RL(kq = kqueue());

       timeout.tv_sec = 0;
       timeout.tv_nsec = 0;

       RL(pid = fork());
       if (pid == 0) {
               (void)sleep(1); /* let parent set kevent */
               child_one();
               /* NOTREACHED */
       }

       EV_SET(&ke, (uintptr_t)pid, EVFILT_PROC, EV_ADD, NOTE_FORK|NOTE_TRACK,
           0, 0);

       RL(kevent(kq, &ke, 1, NULL, 0, &timeout));

       (void)sleep(2);

       ke.ident = 0;
       ke.fflags = 0;
       ke.flags = EV_ENABLE;

       RL(kevent(kq, NULL, 0, &ke, 1, &timeout));
       RL(close(kq));

       RL(waitpid(pid, &status, 0));
       ATF_REQUIRE(WIFEXITED(status));
       ATF_REQUIRE_EQ(WEXITSTATUS(status), EXIT_SUCCESS);

       /*
        * we are expecting an error here as we should not have
        * been able to add a knote to child 2.
        */
       ATF_REQUIRE(ke.fflags & NOTE_TRACKERR);
}

ATF_TP_ADD_TCS(tp)
{
       ATF_TP_ADD_TC(tp, proc2);

       return atf_no_error();
}