tests/kernel/kqueue/read/t_file.c

   1 /* $NetBSD: t_file.c,v 1.3 2010/11/07 17:51:20 jmmv Exp $ */
   2
   3 /*-
   4  * Copyright (c) 2002, 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.
   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_file.c,v 1.3 2010/11/07 17:51:20 jmmv Exp $");
  36
  37 #include <sys/param.h>
  38 #include <sys/event.h>
  39 #include <sys/mount.h>
  40 #include <sys/wait.h>
  41
  42 #include <err.h>
  43 #include <errno.h>
  44 #include <fcntl.h>
  45 #include <stdio.h>
  46 #include <stdlib.h>
  47 #include <string.h>
  48 #include <unistd.h>
  49 #include <inttypes.h>
  50
  51 #include <atf-c.h>
  52
  53 #include "../../../h_macros.h"
  54
  55 #define FILENAME "file"
  56 #define NLINES 5
  57
  58 static void
  59 child(void)
  60 {
  61         int i, n, fd;
  62
  63         (void)sleep(1);
  64
  65         for (i = 0; i < NLINES; ++i) {
  66                 fd = open(FILENAME, O_WRONLY|O_APPEND, 0644);
  67                 if (fd < 0)
  68                         err(EXIT_FAILURE, "open()");
  69
  70                 n = write(fd, "foo\n", 4);
  71                 if (n < 0)
  72                         err(EXIT_FAILURE, "write()");
  73
  74                 (void)close(fd);
  75                 (void)sleep(1);
  76         }
  77         _exit(0);
  78 }
  79
  80 ATF_TC(file);
  81 ATF_TC_HEAD(file, tc)
  82 {
  83         atf_tc_set_md_var(tc, "descr", "Checks EVFILT_READ on regular file");
  84 }
  85 ATF_TC_BODY(file, tc)
  86 {
  87         char buffer[128];
  88         struct kevent event[1];
  89         pid_t pid;
  90         int fd, kq, n, num, status;
  91
  92         RL(pid = fork());
  93         if (pid == 0) {
  94                 child();
  95                 /* NOTREACHED */
  96         }
  97
  98         RL(fd = open(FILENAME, O_RDONLY|O_CREAT, 0644));
  99
 100 #if 1           /* XXX: why was this disabled? */
 101         RL(lseek(fd, 0, SEEK_END));
 102 #endif
 103
 104         RL(kq = kqueue());
 105
 106         EV_SET(&event[0], fd, EVFILT_READ, EV_ADD|EV_ENABLE, 0, 0, 0);
 107         RL(kevent(kq, event, 1, NULL, 0, NULL));
 108
 109         for (num = 0; num < NLINES;) {
 110                 RL(n = kevent(kq, NULL, 0, event, 1, NULL));
 111                 num += n;
 112
 113                 (void)printf("kevent num %d flags: %#x, fflags: %#x, data: "
 114                     "%" PRId64 "\n", n, event[0].flags, event[0].fflags,
 115                     event[0].data);
 116
 117                 if (event[0].data < 0)
 118 #if 1   /* XXXLUKEM */
 119                         RL(lseek(fd, 0, SEEK_END));
 120 #else
 121                         RL(lseek(fd, event[0].data, SEEK_END));
 122 #endif
 123
 124                 RL(n = read(fd, buffer, 128));
 125                 buffer[n] = '\0';
 126                 (void)printf("file(%d): %s", num, buffer);
 127         }
 128
 129         (void)waitpid(pid, &status, 0);
 130
 131         (void)printf("read: successful end\n");
 132 }
 133
 134 ATF_TP_ADD_TCS(tp)
 135 {
 136         ATF_TP_ADD_TC(tp, file);
 137
 138         return atf_no_error();
 139 }