1 /* $NetBSD: t_proc2.c,v 1.3 2017/01/13 21:30:41 christos Exp $ */
2
3 /*-
4 * Copyright (c) 2008 The NetBSD Foundation, Inc.
5 * All rights reserved.
6 *
7 * This code is derived from software contributed to The NetBSD Foundation
8 * by Peter Werner <Peter.Werner@wgsn.com>.
9 *
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
12 * are met:
13 * 1. Redistributions of source code must retain the above copyright
14 * notice, this list of conditions and the following disclaimer.
15 * 2. Redistributions in binary form must reproduce the above copyright
16 * notice, this list of conditions and the following disclaimer in the
17 * documentation and/or other materials provided with the distribution.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
29 * POSSIBILITY OF SUCH DAMAGE.
30 */
31
32 #include <sys/cdefs.h>
33 __COPYRIGHT("@(#) Copyright (c) 2008\
34 The NetBSD Foundation, inc. All rights reserved.");
35 __RCSID("$NetBSD: t_proc2.c,v 1.3 2017/01/13 21:30:41 christos Exp $");
36
37 #include <sys/event.h>
38 #include <sys/time.h>
39 #include <sys/types.h>
40 #include <sys/wait.h>
41
42 #include <err.h>
43 #include <pwd.h>
44 #include <stdio.h>
45 #include <stdlib.h>
46 #include <unistd.h>
47
48 #include <atf-c.h>
49
50 #include "h_macros.h"
51
52 static void
child_two(void)53 child_two(void)
54 {
55 _exit(EXIT_SUCCESS);
56 }
57
58 static void
child_one(void)59 child_one(void)
60 {
61 pid_t pid;
62 struct passwd *pwd;
63 const char *nam = "nobody";
64
65 pwd = getpwnam(nam);
66 if (pwd == NULL)
67 err(EXIT_FAILURE, "getpwnam(\"%s\")", nam);
68
69 if ((setuid(pwd->pw_uid)) == -1)
70 err(EXIT_FAILURE, "setuid(%d)", pwd->pw_uid);
71
72 pid = fork();
73 if (pid == -1)
74 err(EXIT_FAILURE, "fork()");
75
76 if (pid == 0)
77 child_two();
78
79 _exit(EXIT_SUCCESS);
80 }
81
82 ATF_TC(proc2);
ATF_TC_HEAD(proc2,tc)83 ATF_TC_HEAD(proc2, tc)
84 {
85 atf_tc_set_md_var(tc, "require.user", "root");
86 atf_tc_set_md_var(tc, "descr",
87 "Checks EVFILT_PROC for NOTE_FORK|NOTE_TRACK error path problem "
88 "fixed in rev. 1.1.1.1.2.17 of sys/kern/kern_event.c");
89 }
ATF_TC_BODY(proc2,tc)90 ATF_TC_BODY(proc2, tc)
91 {
92 pid_t pid = 0;
93 int kq, status;
94 struct kevent ke;
95 struct timespec timeout;
96
97 RL(kq = kqueue());
98
99 timeout.tv_sec = 0;
100 timeout.tv_nsec = 0;
101
102 RL(pid = fork());
103 if (pid == 0) {
104 (void)sleep(1); /* let parent set kevent */
105 child_one();
106 /* NOTREACHED */
107 }
108
109 EV_SET(&ke, (uintptr_t)pid, EVFILT_PROC, EV_ADD, NOTE_FORK|NOTE_TRACK,
110 0, 0);
111
112 RL(kevent(kq, &ke, 1, NULL, 0, &timeout));
113
114 (void)sleep(2);
115
116 ke.ident = 0;
117 ke.fflags = 0;
118 ke.flags = EV_ENABLE;
119
120 RL(kevent(kq, NULL, 0, &ke, 1, &timeout));
121 RL(close(kq));
122
123 RL(waitpid(pid, &status, 0));
124 ATF_REQUIRE(WIFEXITED(status));
125 ATF_REQUIRE_EQ(WEXITSTATUS(status), EXIT_SUCCESS);
126
127 /*
128 * we are expecting an error here as we should not have
129 * been able to add a knote to child 2.
130 */
131 ATF_REQUIRE(ke.fflags & NOTE_TRACKERR);
132 }
133
ATF_TP_ADD_TCS(tp)134 ATF_TP_ADD_TCS(tp)
135 {
136 ATF_TP_ADD_TC(tp, proc2);
137
138 return atf_no_error();
139 }
140