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t_pipe.c revision 1.2 
      1 /* $NetBSD: t_pipe.c,v 1.2 2017/01/13 21:30:41 christos Exp $ */
      2 
      3 /*-
      4  * Copyright (c) 2002 The NetBSD Foundation, Inc.
      5  * All rights reserved.
      6  *
      7  * This code is derived from software contributed to The NetBSD Foundation
      8  * by Luke Mewburn and Jaromir Dolecek.
      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_pipe.c,v 1.2 2017/01/13 21:30:41 christos Exp $");
     36 
     37 #include <sys/event.h>
     38 #include <sys/wait.h>
     39 
     40 #include <fcntl.h>
     41 #include <stdio.h>
     42 #include <stdlib.h>
     43 #include <unistd.h>
     44 
     45 #include <atf-c.h>
     46 
     47 #include "h_macros.h"
     48 
     49 ATF_TC(pipe1);
     50 ATF_TC_HEAD(pipe1, tc)
     51 {
     52 	atf_tc_set_md_var(tc, "descr",
     53 	    "Checks EVFILT_WRITE for pipes. This test used to trigger "
     54 	    "problem fixed in rev. 1.5.2.7 of sys/kern/sys_pipe.c");
     55 }
     56 ATF_TC_BODY(pipe1, tc)
     57 {
     58 	struct kevent event[1];
     59 	int fds[2];
     60 	int kq, n;
     61 
     62 	RL(pipe(fds));
     63 	RL(kq = kqueue());
     64 	RL(close(fds[0]));
     65 
     66 	EV_SET(&event[0], fds[1], EVFILT_WRITE, EV_ADD|EV_ENABLE, 0, 0, 0);
     67 	ATF_REQUIRE_EQ_MSG((n = kevent(kq, event, 1, NULL, 0, NULL)),
     68 	    -1, "got: %d", n);
     69 	ATF_REQUIRE_EQ_MSG(errno, EBADF, "got: %s", strerror(errno));
     70 }
     71 
     72 ATF_TC(pipe2);
     73 ATF_TC_HEAD(pipe2, tc)
     74 {
     75 	atf_tc_set_md_var(tc, "descr",
     76 	    "Checks EVFILT_WRITE for pipes. This test used to trigger problem "
     77 	    "fixed in rev. 1.5.2.9 of sys/kern/sys_pipe.c");
     78 }
     79 ATF_TC_BODY(pipe2, tc)
     80 {
     81 	struct kevent event[1];
     82 	char buffer[128];
     83 	int fds[2];
     84 	int kq, n;
     85 	int status;
     86 	pid_t child;
     87 
     88 	RL(pipe(fds));
     89 	RL(kq = kqueue());
     90 
     91 	EV_SET(&event[0], fds[1], EVFILT_WRITE, EV_ADD|EV_ENABLE, 0, 0, 0);
     92 	RL(kevent(kq, event, 1, NULL, 0, NULL));
     93 
     94 	/* spawn child reader */
     95 	RL(child = fork());
     96 	if (child == 0) {
     97 		int sz = read(fds[0], buffer, 128);
     98 		if (sz > 0)
     99 			(void)printf("pipe: child read '%.*s'\n", sz, buffer);
    100 		exit(sz <= 0);
    101 	}
    102 
    103 	RL(n = kevent(kq, NULL, 0, event, 1, NULL));
    104 
    105 	(void)printf("kevent num %d flags: %#x, fflags: %#x, data: "
    106 	    "%" PRId64 "\n", n, event[0].flags, event[0].fflags, event[0].data);
    107 
    108 	RL(n = write(fds[1], "foo", 3));
    109 	RL(close(fds[1]));
    110 
    111 	(void)waitpid(child, &status, 0);
    112 }
    113 
    114 ATF_TC(pipe3);
    115 ATF_TC_HEAD(pipe3, tc)
    116 {
    117 	atf_tc_set_md_var(tc, "descr",
    118 	    "Checks EVFILT_WRITE for pipes. This test used to trigger problem "
    119 	    "fixed in rev. 1.5.2.10 of sys/kern/sys_pipe.c");
    120 }
    121 ATF_TC_BODY(pipe3, tc)
    122 {
    123 	struct kevent event[1];
    124 	int fds[2];
    125 	int kq;
    126 
    127 	RL(pipe(fds));
    128 	RL(kq = kqueue());
    129 
    130 	EV_SET(&event[0], fds[1], EVFILT_WRITE, EV_ADD|EV_ENABLE, 0, 0, 0);
    131 	RL(kevent(kq, event, 1, NULL, 0, NULL));
    132 
    133 	/* close 'read' end first, then 'write' */
    134 
    135 	RL(close(fds[0]));
    136 	RL(close(fds[1]));
    137 }
    138 
    139 
    140 ATF_TP_ADD_TCS(tp)
    141 {
    142 	ATF_TP_ADD_TC(tp, pipe1);
    143 	ATF_TP_ADD_TC(tp, pipe2);
    144 	ATF_TP_ADD_TC(tp, pipe3);
    145 
    146 	return atf_no_error();
    147 }
    148