/* $NetBSD: t_proc4.c,v 1.1 2021/10/10 17:43:15 thorpej Exp $ */
/*-
* Copyright (c) 2021 The NetBSD Foundation, Inc.
* All rights reserved.
*
* 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_proc4.c,v 1.1 2021/10/10 17:43:15 thorpej Exp $");
#include <sys/event.h>
#include <sys/time.h>
#include <sys/types.h>
#include <sys/wait.h>
#include <err.h>
#include <limits.h>
#include <pwd.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <atf-c.h>
/* 10 children each create 10 grandchildren. */
#define TOTAL_CHILDREN 10
#define TOTAL_GRANDCHILDREN (TOTAL_CHILDREN * TOTAL_CHILDREN)
#define TOTAL_DESCENDENTS (TOTAL_CHILDREN + TOTAL_GRANDCHILDREN)
#define EXIT_CHILD 66
#define EXIT_GRANDCHILD 76
static void
child(void)
{
int i, status;
pid_t pid;
for (i = 0; i < TOTAL_CHILDREN; i++) {
ATF_REQUIRE((pid = fork()) != -1);
if (pid == 0) {
/* grandchild */
_exit(EXIT_GRANDCHILD);
}
}
for (i = 0; i < TOTAL_CHILDREN; i++) {
ATF_REQUIRE((pid = wait(&status)) != -1);
}
_exit(EXIT_CHILD);
}
ATF_TC(proc4);
ATF_TC_HEAD(proc4, tc)
{
atf_tc_set_md_var(tc, "descr", "Exercises EVFILT_PROC + NOTE_TRACK");
}
ATF_TC_BODY(proc4, tc)
{
int total_tracks = 0;
int child_exits = 0;
int grandchild_exits = 0;
pid_t pid;
int kq, status;
struct kevent event;
struct timespec ts = { 0, 0 };
int i, rv;
ATF_REQUIRE((kq = kqueue()) >= 0);
EV_SET(&event, getpid(), EVFILT_PROC, EV_ADD,
NOTE_TRACK | NOTE_EXIT, 0, 0);
ATF_REQUIRE(kevent(kq, &event, 1, NULL, 0, NULL) == 0);
for (i = 0; i < TOTAL_CHILDREN; i++) {
ATF_REQUIRE((pid = fork()) != -1);
if (pid == 0) {
child();
/* NOTREACHED */
}
}
for (;;) {
if (total_tracks == TOTAL_DESCENDENTS &&
child_exits == TOTAL_CHILDREN &&
grandchild_exits == TOTAL_GRANDCHILDREN) {
break;
}
memset(&event, 0, sizeof(event));
rv = kevent(kq, NULL, 0, &event, 1, NULL);
ATF_REQUIRE(rv != -1);
ATF_REQUIRE(rv == 1);
if (event.fflags & NOTE_CHILD) {
total_tracks++;
ATF_REQUIRE(total_tracks <= TOTAL_DESCENDENTS);
} else if (event.fflags & NOTE_EXIT) {
ATF_REQUIRE(event.flags & EV_EOF);
ATF_REQUIRE(event.data >= 0);
ATF_REQUIRE(event.data <= UINT_MAX);
status = (int)event.data;
ATF_REQUIRE(WIFEXITED(status));
ATF_REQUIRE(WEXITSTATUS(status) == EXIT_CHILD ||
WEXITSTATUS(status) == EXIT_GRANDCHILD);
if (WEXITSTATUS(status) == EXIT_CHILD) {
child_exits++;
ATF_REQUIRE(child_exits <= TOTAL_CHILDREN);
ATF_REQUIRE(wait4((pid_t)event.ident,
&status,
WNOHANG,
NULL) != -1);
ATF_REQUIRE(status == (int)event.data);
} else {
grandchild_exits++;
ATF_REQUIRE(grandchild_exits <=
TOTAL_GRANDCHILDREN);
}
} else {
/*
* We didn't ask for NOTE_FORK, so we don't
* expect to ever see it, even though we are
* getting NOTE_CHILD as the result of the
* NOTE_TRACK.
*/
ATF_REQUIRE((event.fflags & NOTE_FORK) == 0);
/*
* Bomb out of we are getting a TRACKERR.
* XXX This could legitimately happen if
* the kernel is low on memory because the
* code path involved specifically chooses
* not to block when allocating memory.
*/
ATF_REQUIRE((event.fflags & NOTE_TRACKERR) == 0);
}
}
ATF_REQUIRE(kevent(kq, NULL, 0, &event, 1, &ts) == 0);
(void)close(kq);
}
ATF_TP_ADD_TCS(tp)
{
ATF_TP_ADD_TC(tp, proc4);
return atf_no_error();
}