xref: /freebsd/tests/sys/kern/waitpid_nohang.c (revision 22cf89c938886d14f5796fc49f9f020c23ea8eaf)
1 /*-
2  * Copyright (c) 2016 Jilles Tjoelker
3  * All rights reserved.
4  *
5  * Redistribution and use in source and binary forms, with or without
6  * modification, are permitted provided that the following conditions
7  * are met:
8  * 1. Redistributions of source code must retain the above copyright
9  *    notice, this list of conditions and the following disclaimer.
10  * 2. Redistributions in binary form must reproduce the above copyright
11  *    notice, this list of conditions and the following disclaimer in the
12  *    documentation and/or other materials provided with the distribution.
13  *
14  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
15  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
17  * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
18  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
19  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
20  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
21  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
22  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
23  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
24  * SUCH DAMAGE.
25  */
26 
27 #include <sys/cdefs.h>
28 #include <sys/wait.h>
29 
30 #include <atf-c.h>
31 #include <signal.h>
32 #include <unistd.h>
33 
34 ATF_TC_WITHOUT_HEAD(waitpid_nohang);
35 ATF_TC_BODY(waitpid_nohang, tc)
36 {
37 	pid_t child, pid;
38 	int status, r;
39 
40 	child = fork();
41 	ATF_REQUIRE(child != -1);
42 	if (child == 0) {
43 		sleep(10);
44 		_exit(1);
45 	}
46 
47 	status = 42;
48 	pid = waitpid(child, &status, WNOHANG);
49 	ATF_REQUIRE(pid == 0);
50 	ATF_CHECK(status == 42);
51 
52 	r = kill(child, SIGTERM);
53 	ATF_REQUIRE(r == 0);
54 	r = waitid(P_PID, child, NULL, WEXITED | WNOWAIT);
55 	ATF_REQUIRE(r == 0);
56 
57 	status = -1;
58 	pid = waitpid(child, &status, WNOHANG);
59 	ATF_REQUIRE(pid == child);
60 	ATF_CHECK(WIFSIGNALED(status) && WTERMSIG(status) == SIGTERM);
61 }
62 
63 ATF_TP_ADD_TCS(tp)
64 {
65 
66 	ATF_TP_ADD_TC(tp, waitpid_nohang);
67 	return (atf_no_error());
68 }
69