tests/kernel/kqueue/read/t_fifo.c

   1 /* $NetBSD: t_fifo.c,v 1.3 2010/11/07 17:51:20 jmmv 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 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_fifo.c,v 1.3 2010/11/07 17:51:20 jmmv Exp $");
  36
  37 #include <sys/event.h>
  38 #include <sys/stat.h>
  39
  40 #include <fcntl.h>
  41 #include <stdio.h>
  42 #include <stdlib.h>
  43 #include <string.h>
  44 #include <unistd.h>
  45 #include <inttypes.h>
  46
  47 #include <atf-c.h>
  48
  49 #include "../../../h_macros.h"
  50
  51 #define FIFONAME "fifo"
  52
  53 ATF_TC(fifo);
  54 ATF_TC_HEAD(fifo, tc)
  55 {
  56         atf_tc_set_md_var(tc, "descr", "Checks EVFILT_READ on fifo");
  57 }
  58 ATF_TC_BODY(fifo, tc)
  59 {
  60         int kq, n, fd;
  61         struct kevent event[1];
  62         char buffer[128];
  63
  64         RL(mkfifo(FIFONAME, 0644));
  65         RL(fd = open(FIFONAME, O_RDWR, 0644));
  66
  67         RL(kq = kqueue());
  68
  69         EV_SET(&event[0], fd, EVFILT_READ, EV_ADD|EV_ENABLE, 0, 0, 0);
  70         RL(kevent(kq, event, 1, NULL, 0, NULL));
  71
  72         /* make sure there is something in the fifo */
  73         RL(write(fd, "foo", 3));
  74         (void)printf("fifo: wrote 'foo'\n");
  75
  76         (void)memset(event, 0, sizeof(event));
  77
  78         RL(n = kevent(kq, NULL, 0, event, 1, NULL));
  79
  80         (void)printf("kevent num %d filt %d flags: %#x, fflags: %#x, "
  81             "data: %" PRId64 "\n", n, event[0].filter, event[0].flags,
  82             event[0].fflags, event[0].data);
  83
  84         ATF_REQUIRE_EQ(event[0].filter, EVFILT_READ);
  85
  86         RL(n = read(fd, buffer, event[0].data));
  87         buffer[n] = '\0';
  88         (void)printf("fifo: read '%s'\n", buffer);
  89
  90         RL(close(fd));
  91 }
  92
  93 ATF_TP_ADD_TCS(tp)
  94 {
  95         ATF_TP_ADD_TC(tp, fifo);
  96
  97         return atf_no_error();
  98 }