minix/tests/lib/libc/sys/t_kevent.c

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/* $NetBSD: t_kevent.c,v 1.6 2012/11/29 09:13:44 martin Exp $ */
/*-
* Copyright (c) 2011 The NetBSD Foundation, Inc.
* All rights reserved.
*
* This code is derived from software contributed to The NetBSD Foundatiom
* by Christos Zoulas.
*
* 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>
__RCSID("$NetBSD: t_kevent.c,v 1.6 2012/11/29 09:13:44 martin Exp $");
#include <sys/types.h>
#include <sys/event.h>
#include <atf-c.h>
#include <errno.h>
#include <time.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include <fcntl.h>
#include <err.h>
#include <sys/drvctlio.h>
#include <sys/event.h>
#include <sys/time.h>
#include <sys/socket.h>
#include <sys/wait.h>
ATF_TC(kevent_zerotimer);
ATF_TC_HEAD(kevent_zerotimer, tc)
{
atf_tc_set_md_var(tc, "descr", "Checks that kevent with a 0 timer "
"does not crash the system (PR lib/45618)");
}
ATF_TC_BODY(kevent_zerotimer, tc)
{
struct kevent ev;
int kq;
ATF_REQUIRE((kq = kqueue()) != -1);
EV_SET(&ev, 1, EVFILT_TIMER, EV_ADD|EV_ENABLE, 0, 1, 0);
ATF_REQUIRE(kevent(kq, &ev, 1, NULL, 0, NULL) != -1);
ATF_REQUIRE(kevent(kq, NULL, 0, &ev, 1, NULL) == 1);
}
ATF_TC(kqueue_desc_passing);
ATF_TC_HEAD(kqueue_desc_passing, tc)
{
atf_tc_set_md_var(tc, "descr", "Checks that passing a kqueue to "
"another process does not crash the kernel (PR 46463)");
}
ATF_TC_BODY(kqueue_desc_passing, tc)
{
pid_t child;
int s[2], storage, status, kq;
struct cmsghdr *msg;
struct iovec iov;
struct msghdr m;
struct kevent ev;
ATF_REQUIRE((kq = kqueue()) != -1);
// atf_tc_skip("crashes kernel (PR 46463)");
ATF_REQUIRE(socketpair(AF_LOCAL, SOCK_STREAM, 0, s) != -1);
msg = malloc(CMSG_SPACE(sizeof(int)));
m.msg_iov = &iov;
m.msg_iovlen = 1;
m.msg_name = NULL;
m.msg_namelen = 0;
m.msg_control = msg;
m.msg_controllen = CMSG_SPACE(sizeof(int));
child = fork();
if (child == 0) {
close(s[0]);
iov.iov_base = &storage;
iov.iov_len = sizeof(int);
m.msg_iov = &iov;
m.msg_iovlen = 1;
if (recvmsg(s[1], &m, 0) == -1)
err(1, "child: could not recvmsg");
kq = *(int *)CMSG_DATA(msg);
printf("child (pid %d): received kq fd %d\n", getpid(), kq);
exit(0);
}
close(s[1]);
iov.iov_base = &storage;
iov.iov_len = sizeof(int);
msg->cmsg_level = SOL_SOCKET;
msg->cmsg_type = SCM_RIGHTS;
msg->cmsg_len = CMSG_LEN(sizeof(int));
*(int *)CMSG_DATA(msg) = kq;
EV_SET(&ev, 1, EVFILT_TIMER, EV_ADD|EV_ENABLE, 0, 1, 0);
ATF_CHECK(kevent(kq, &ev, 1, NULL, 0, NULL) != -1);
printf("parent (pid %d): sending kq fd %d\n", getpid(), kq);
if (sendmsg(s[0], &m, 0) == -1) {
ATF_REQUIRE_EQ_MSG(errno, EBADF, "errno is %d", errno);
atf_tc_skip("PR kern/46523");
}
close(kq);
waitpid(child, &status, 0);
ATF_CHECK(WIFEXITED(status) && WEXITSTATUS(status)==0);
}
ATF_TC(kqueue_unsupported_fd);
ATF_TC_HEAD(kqueue_unsupported_fd, tc)
{
atf_tc_set_md_var(tc, "descr", "Checks that watching an fd whose"
" type is not supported does not crash the kernel");
}
ATF_TC_BODY(kqueue_unsupported_fd, tc)
{
/* mqueue and semaphore use fnullop_kqueue also */
int fd, kq;
struct kevent ev;
fd = open(DRVCTLDEV, O_RDONLY);
if (fd == -1 && errno == ENOENT)
atf_tc_skip("no " DRVCTLDEV " available for testing");
ATF_REQUIRE(fd != -1);
ATF_REQUIRE((kq = kqueue()) != -1);
EV_SET(&ev, fd, EVFILT_VNODE, EV_ADD | EV_ENABLE | EV_CLEAR,
NOTE_DELETE|NOTE_WRITE|NOTE_EXTEND|NOTE_ATTRIB|NOTE_LINK|
NOTE_RENAME|NOTE_REVOKE, 0, 0);
ATF_REQUIRE(kevent(kq, &ev, 1, NULL, 0, NULL) == -1);
ATF_REQUIRE_ERRNO(EOPNOTSUPP, true);
(void)close(fd);
}
ATF_TP_ADD_TCS(tp)
{
ATF_TP_ADD_TC(tp, kevent_zerotimer);
ATF_TP_ADD_TC(tp, kqueue_desc_passing);
ATF_TP_ADD_TC(tp, kqueue_unsupported_fd);
return atf_no_error();
}