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t_file.c revision 1.4 
      1 /* $NetBSD: t_file.c,v 1.4 2017/01/13 21:30:41 christos 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 1.4 2017/01/13 21:30:41 christos 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 }
    140