tests/kernel/kqueue/t_proc2.c

   1 /* $NetBSD$ */
   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("$NetBSD$");
  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
  53 child_two(void)
  54 {
  55         _exit(EXIT_SUCCESS);
  56 }
  57
  58 static 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);
  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 }
  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, pid, EVFILT_PROC, EV_ADD, NOTE_FORK|NOTE_TRACK, 0, 0);
 110
 111         RL(kevent(kq, &ke, 1, NULL, 0, &timeout));
 112
 113         (void)sleep(2);
 114
 115         ke.ident = 0;
 116         ke.fflags = 0;
 117         ke.flags = EV_ENABLE;
 118
 119         RL(kevent(kq, NULL, 0, &ke, 1, &timeout));
 120         RL(close(kq));
 121
 122         RL(waitpid(pid, &status, 0));
 123         ATF_REQUIRE(WIFEXITED(status));
 124         ATF_REQUIRE_EQ(WEXITSTATUS(status), EXIT_SUCCESS);
 125
 126         /*
 127          * we are expecting an error here as we should not have
 128          * been able to add a knote to child 2.
 129          */
 130         ATF_REQUIRE(ke.fflags & NOTE_TRACKERR);
 131 }
 132
 133 ATF_TP_ADD_TCS(tp)
 134 {
 135         ATF_TP_ADD_TC(tp, proc2);
 136
 137         return atf_no_error();
 138 }