1410 lines
34 KiB
C
1410 lines
34 KiB
C
/*-
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* Copyright (c) 2005 Robert N. M. Watson
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#include <sys/types.h>
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#include <sys/event.h>
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#include <sys/ioctl.h>
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#include <sys/select.h>
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#include <sys/stat.h>
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#include <sys/time.h>
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#include <err.h>
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#include <errno.h>
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#include <fcntl.h>
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#include <limits.h>
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#include <poll.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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/*
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* Regression test to exercise POSIX fifo I/O.
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*
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* We test a number of aspect of behavior, including:
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*
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* - If there's no data to read, then for blocking fifos, we block, and for
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* non-blocking, we return EAGAIN.
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*
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* - If we write ten bytes, ten bytes can be read, and they're the same
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* bytes, in the same order.
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*
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* - If we write two batches of five bytes, we can read the same ten bytes in
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* one read of ten bytes.
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*
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* - If we write ten bytes, we can read the same ten bytes in two reads of
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* five bytes each.
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*
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* - If we over-fill a buffer (by writing 512k, which we take to be a large
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* number above default buffer sizes), we block if there is no reader.
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*
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* - That once 512k (ish) is read from the other end, the blocked writer
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* wakes up.
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*
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* - When a fifo is empty, poll, select, kqueue, and fionread report it is
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* writable but not readable.
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*
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* - When a fifo has data in it, poll, select, and kqueue report that it is
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* writable.
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*
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* - XXX: blocked reader semantics?
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*
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* - XXX: event behavior on remote close?
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*
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* Although behavior of O_RDWR isn't defined for fifos by POSIX, we expect
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* "reasonable" behavior, and run some additional tests relating to event
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* management on O_RDWR fifo descriptors.
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*/
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#define KQUEUE_MAX_EVENT 8
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/*
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* All activity occurs within a temporary directory created early in the
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* test.
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*/
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char temp_dir[PATH_MAX];
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static void __unused
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atexit_temp_dir(void)
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{
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rmdir(temp_dir);
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}
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static void
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makefifo(const char *fifoname, const char *testname)
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{
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if (mkfifo(fifoname, 0700) < 0)
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err(-1, "%s: makefifo: mkfifo: %s", testname, fifoname);
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}
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static void
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cleanfifo2(const char *fifoname, int fd1, int fd2)
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{
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if (fd1 != -1)
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close(fd1);
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if (fd2 != -1)
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close(fd2);
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(void)unlink(fifoname);
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}
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static void
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cleanfifo3(const char *fifoname, int fd1, int fd2, int fd3)
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{
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if (fd3 != -1)
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close(fd3);
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cleanfifo2(fifoname, fd1, fd2);
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}
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/*
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* Open two different file descriptors for a fifo: one read, one write. Do
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* so using non-blocking opens in order to avoid deadlocking the process.
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*/
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static int
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openfifo(const char *fifoname, const char *testname, int *reader_fdp,
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int *writer_fdp)
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{
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int error, fd1, fd2;
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fd1 = open(fifoname, O_RDONLY | O_NONBLOCK);
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if (fd1 < 0)
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return (-1);
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fd2 = open(fifoname, O_WRONLY | O_NONBLOCK);
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if (fd2 < 0) {
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error = errno;
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close(fd1);
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errno = error;
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return (-1);
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}
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*reader_fdp = fd1;
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*writer_fdp = fd2;
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return (0);
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}
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/*
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* Open one file descriptor for the fifo, supporting both read and write.
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*/
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static int
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openfifo_rw(const char *fifoname, const char *testname, int *fdp)
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{
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int fd;
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fd = open(fifoname, O_RDWR);
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if (fd < 0)
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return (-1);
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*fdp = fd;
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return (0);
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}
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static int
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set_nonblocking(int fd, const char *testname)
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{
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int flags;
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flags = fcntl(fd, F_GETFL);
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if (flags < 0) {
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warn("%s: fcntl(fd, F_GETFL)", testname);
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return(-1);
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}
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flags |= O_NONBLOCK;
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if (fcntl(fd, F_SETFL, flags) < 0) {
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warn("%s: fcntl(fd, 0x%x)", testname, flags);
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return (-1);
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}
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return (0);
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}
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static int
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set_blocking(int fd, const char *testname)
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{
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int flags;
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flags = fcntl(fd, F_GETFL);
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if (flags < 0) {
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warn("%s: fcntl(fd, F_GETFL)", testname);
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return(-1);
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}
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flags &= ~O_NONBLOCK;
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if (fcntl(fd, F_SETFL, flags) < 0) {
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warn("%s: fcntl(fd, 0x%x)", testname, flags);
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return (-1);
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}
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return (0);
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}
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/*
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* Drain a file descriptor (fifo) of any readable data. Note: resets the
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* blocking state.
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*/
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static int
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drain_fd(int fd, const char *testname)
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{
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ssize_t len;
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u_char ch;
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if (set_nonblocking(fd, testname) < 0)
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return (-1);
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while ((len = read(fd, &ch, sizeof(ch))) > 0);
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if (len < 0) {
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switch (errno) {
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case EAGAIN:
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return (0);
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default:
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warn("%s: drain_fd: read", testname);
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return (-1);
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}
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}
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warn("%s: drain_fd: read: returned 0 bytes", testname);
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return (-1);
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}
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/*
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* Simple I/O test: write ten integers, and make sure we get back the same
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* integers in the same order. This assumes a minimum fifo buffer > 10
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* bytes in order to not block and deadlock.
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*/
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static void
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test_simpleio(void)
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{
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int i, reader_fd, writer_fd;
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u_char buffer[10];
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ssize_t len;
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makefifo("testfifo", __func__);
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if (openfifo("testfifo", "test_simpleio", &reader_fd, &writer_fd)
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< 0) {
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warn("test_simpleio: openfifo: testfifo");
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cleanfifo2("testfifo", -1, -1);
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exit(-1);
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}
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for (i = 0; i < 10; i++)
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buffer[i] = i;
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len = write(writer_fd, (char *)buffer, sizeof(buffer));
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if (len < 0) {
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warn("test_simpleio: write");
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cleanfifo2("testfifo", reader_fd, writer_fd);
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exit(-1);
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}
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if (len != sizeof(buffer)) {
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warnx("test_simplio: tried %zu but wrote %zd", sizeof(buffer),
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len);
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cleanfifo2("testfifo", reader_fd, writer_fd);
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exit(-1);
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}
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len = read(reader_fd, (char *)buffer, sizeof(buffer));
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if (len < 0) {
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warn("test_simpleio: read");
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cleanfifo2("testfifo", reader_fd, writer_fd);
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exit(-1);
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}
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if (len != sizeof(buffer)) {
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warnx("test_simpleio: tried %zu but read %zd", sizeof(buffer),
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len);
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cleanfifo2("testfifo", reader_fd, writer_fd);
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exit(-1);
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}
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for (i = 0; i < 10; i++) {
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if (buffer[i] == i)
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continue;
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warnx("test_simpleio: write byte %d as 0x%02x, but read "
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"0x%02x", i, i, buffer[i]);
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cleanfifo2("testfifo", reader_fd, writer_fd);
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exit(-1);
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}
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cleanfifo2("testfifo", reader_fd, writer_fd);
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}
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static int alarm_fired;
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/*
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* Non-destructive SIGALRM handler.
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*/
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static void
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sigalarm(int signum)
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{
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alarm_fired = 1;
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}
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/*
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* Wrapper function for write, which uses a timer to interrupt any blocking.
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* Because we can't reliably detect EINTR for blocking I/O, we also track
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* whether or not our timeout fired.
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*/
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static int __unused
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timed_write(int fd, void *data, size_t len, ssize_t *written_lenp,
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int timeout, int *timedoutp, const char *testname)
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{
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struct sigaction act, oact;
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ssize_t written_len;
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int error;
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alarm_fired = 0;
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bzero(&act, sizeof(oact));
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act.sa_handler = sigalarm;
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if (sigaction(SIGALRM, &act, &oact) < 0) {
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warn("%s: timed_write: sigaction", testname);
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return (-1);
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}
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alarm(timeout);
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written_len = write(fd, data, len);
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error = errno;
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alarm(0);
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if (sigaction(SIGALRM, &oact, NULL) < 0) {
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warn("%s: timed_write: sigaction", testname);
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return (-1);
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}
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if (alarm_fired)
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*timedoutp = 1;
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else
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*timedoutp = 0;
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errno = error;
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if (written_len < 0)
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return (-1);
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*written_lenp = written_len;
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return (0);
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}
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/*
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* Wrapper function for read, which uses a timer to interrupt any blocking.
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* Because we can't reliably detect EINTR for blocking I/O, we also track
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* whether or not our timeout fired.
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*/
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static int
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timed_read(int fd, void *data, size_t len, ssize_t *read_lenp,
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int timeout, int *timedoutp, const char *testname)
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{
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struct sigaction act, oact;
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ssize_t read_len;
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int error;
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alarm_fired = 0;
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bzero(&act, sizeof(oact));
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act.sa_handler = sigalarm;
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if (sigaction(SIGALRM, &act, &oact) < 0) {
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warn("%s: timed_write: sigaction", testname);
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return (-1);
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}
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alarm(timeout);
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read_len = read(fd, data, len);
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error = errno;
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alarm(0);
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if (sigaction(SIGALRM, &oact, NULL) < 0) {
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warn("%s: timed_write: sigaction", testname);
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return (-1);
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}
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if (alarm_fired)
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*timedoutp = 1;
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else
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*timedoutp = 0;
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errno = error;
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if (read_len < 0)
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return (-1);
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*read_lenp = read_len;
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return (0);
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}
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/*
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* This test operates on blocking and non-blocking fifo file descriptors, in
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* order to determine whether they block at good moments or not. By good we
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* mean: don't block for non-blocking sockets, and do block for blocking
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* ones, assuming there isn't I/O buffer to satisfy the request.
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*
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* We use a timeout of 5 seconds, concluding that in 5 seconds either all I/O
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* that can take place will, and that if we reach the end of the timeout,
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* then blocking has occurred.
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*
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* We assume that the buffer size on a fifo is <512K, and as such, that
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* writing that much data without an active reader will result in blocking.
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*/
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static void
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test_blocking_read_empty(void)
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{
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int reader_fd, ret, timedout, writer_fd;
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ssize_t len;
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u_char ch;
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makefifo("testfifo", __func__);
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if (openfifo("testfifo", __func__, &reader_fd, &writer_fd)
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< 0) {
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warn("test_blocking_read_empty: openfifo: testfifo");
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cleanfifo2("testfifo", -1, -1);
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exit(-1);
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}
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/*
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* Read one byte from an empty blocking fifo, block as there is no
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* data.
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*/
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if (set_blocking(reader_fd, __func__) < 0) {
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cleanfifo2("testfifo", reader_fd, writer_fd);
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exit(-1);
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}
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ret = timed_read(reader_fd, &ch, sizeof(ch), &len, 5, &timedout,
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__func__);
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if (ret != -1) {
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warnx("test_blocking_read_empty: timed_read: returned "
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"success");
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cleanfifo2("testfifo", reader_fd, writer_fd);
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exit(-1);
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}
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if (errno != EINTR) {
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warn("test_blocking_read_empty: timed_read");
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cleanfifo2("testfifo", reader_fd, writer_fd);
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exit(-1);
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}
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/*
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* Read one byte from an empty non-blocking fifo, return EAGAIN as
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* there is no data.
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*/
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if (set_nonblocking(reader_fd, __func__) < 0) {
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cleanfifo2("testfifo", reader_fd, writer_fd);
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exit(-1);
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}
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ret = timed_read(reader_fd, &ch, sizeof(ch), &len, 5, &timedout,
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__func__);
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if (ret != -1) {
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warnx("test_blocking_read_empty: timed_read: returned "
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"success");
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cleanfifo2("testfifo", reader_fd, writer_fd);
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exit(-1);
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}
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if (errno != EAGAIN) {
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warn("test_blocking_read_empty: timed_read");
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cleanfifo2("testfifo", reader_fd, writer_fd);
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exit(-1);
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}
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cleanfifo2("testfifo", reader_fd, writer_fd);
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}
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/*
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* Write one byte to an empty fifo, then try to read one byte and make sure
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* we don't block in either the write or the read. This tests both for
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* improper blocking in the send and receive code.
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*/
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static void
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test_blocking_one_byte(void)
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{
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int reader_fd, ret, timedout, writer_fd;
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ssize_t len;
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u_char ch;
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makefifo("testfifo", __func__);
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if (openfifo("testfifo", __func__, &reader_fd, &writer_fd)
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< 0) {
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warn("test_blocking: openfifo: testfifo");
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cleanfifo2("testfifo", -1, -1);
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exit(-1);
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}
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if (set_blocking(writer_fd, __func__) < 0) {
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cleanfifo2("testfifo", reader_fd, writer_fd);
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exit(-1);
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}
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if (set_blocking(reader_fd, __func__) < 0) {
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cleanfifo2("testfifo", reader_fd, writer_fd);
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exit(-1);
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}
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ch = 0xfe;
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ret = timed_write(writer_fd, &ch, sizeof(ch), &len, 5, &timedout,
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__func__);
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if (ret < 0) {
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warn("test_blocking_one_byte: timed_write");
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cleanfifo2("testfifo", reader_fd, writer_fd);
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exit(-1);
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}
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if (len != sizeof(ch)) {
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warnx("test_blocking_one_byte: timed_write: tried to write "
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"%zu, wrote %zd", sizeof(ch), len);
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cleanfifo2("testfifo", reader_fd, writer_fd);
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exit(-1);
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}
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ch = 0xab;
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ret = timed_read(reader_fd, &ch, sizeof(ch), &len, 5, &timedout,
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__func__);
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if (ret < 0) {
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warn("test_blocking_one_byte: timed_read");
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cleanfifo2("testfifo", reader_fd, writer_fd);
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exit(-1);
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}
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if (len != sizeof(ch)) {
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warnx("test_blocking_one_byte: timed_read: wanted %zu, "
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"read %zd", sizeof(ch), len);
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cleanfifo2("testfifo", reader_fd, writer_fd);
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exit(-1);
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}
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if (ch != 0xfe) {
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warnx("test_blocking_one_byte: timed_read: expected to read "
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"0x%02x, read 0x%02x", 0xfe, ch);
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cleanfifo2("testfifo", reader_fd, writer_fd);
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exit(-1);
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}
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cleanfifo2("testfifo", reader_fd, writer_fd);
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|
}
|
|
|
|
/*
|
|
* Write one byte to an empty fifo, then try to read one byte and make sure
|
|
* we don't get back EAGAIN.
|
|
*/
|
|
static void
|
|
test_nonblocking_one_byte(void)
|
|
{
|
|
int reader_fd, ret, timedout, writer_fd;
|
|
ssize_t len;
|
|
u_char ch;
|
|
|
|
makefifo("testfifo", __func__);
|
|
if (openfifo("testfifo", __func__, &reader_fd, &writer_fd)
|
|
< 0) {
|
|
warn("test_nonblocking: openfifo: testfifo");
|
|
cleanfifo2("testfifo", -1, -1);
|
|
exit(-1);
|
|
}
|
|
|
|
if (set_nonblocking(reader_fd, __func__) < 0) {
|
|
cleanfifo2("testfifo", reader_fd, writer_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
ch = 0xfe;
|
|
ret = timed_write(writer_fd, &ch, sizeof(ch), &len, 5, &timedout,
|
|
__func__);
|
|
if (ret < 0) {
|
|
warn("test_nonblocking_one_byte: timed_write");
|
|
cleanfifo2("testfifo", reader_fd, writer_fd);
|
|
exit(-1);
|
|
}
|
|
if (len != sizeof(ch)) {
|
|
warnx("test_nonblocking_one_byte: timed_write: tried to write "
|
|
"%zu, wrote %zd", sizeof(ch), len);
|
|
cleanfifo2("testfifo", reader_fd, writer_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
ch = 0xab;
|
|
ret = timed_read(reader_fd, &ch, sizeof(ch), &len, 5, &timedout,
|
|
__func__);
|
|
if (ret < 0) {
|
|
warn("test_nonblocking_one_byte: timed_read");
|
|
cleanfifo2("testfifo", reader_fd, writer_fd);
|
|
exit(-1);
|
|
}
|
|
if (len != sizeof(ch)) {
|
|
warnx("test_nonblocking_one_byte: timed_read: wanted %zu, read "
|
|
"%zd", sizeof(ch), len);
|
|
cleanfifo2("testfifo", reader_fd, writer_fd);
|
|
exit(-1);
|
|
}
|
|
if (ch != 0xfe) {
|
|
warnx("test_nonblocking_one_byte: timed_read: expected to read "
|
|
"0x%02x, read 0x%02x", 0xfe, ch);
|
|
cleanfifo2("testfifo", reader_fd, writer_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
cleanfifo2("testfifo", reader_fd, writer_fd);
|
|
}
|
|
|
|
/*
|
|
* First of two test cases involving a 512K buffer: write the buffer into a
|
|
* blocking file descriptor. We'd like to know it blocks, but the closest we
|
|
* can get is to see if SIGALRM fired during the I/O resulting in a partial
|
|
* write.
|
|
*/
|
|
static void
|
|
test_blocking_partial_write(void)
|
|
{
|
|
int reader_fd, ret, timedout, writer_fd;
|
|
u_char *buffer;
|
|
ssize_t len;
|
|
|
|
makefifo("testfifo", __func__);
|
|
if (openfifo("testfifo", __func__, &reader_fd, &writer_fd)
|
|
< 0) {
|
|
warn("test_blocking_partial_write: openfifo: testfifo");
|
|
cleanfifo2("testfifo", -1, -1);
|
|
exit(-1);
|
|
}
|
|
|
|
if (set_blocking(writer_fd, __func__) < 0) {
|
|
cleanfifo2("testfifo", reader_fd, writer_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
buffer = malloc(512*1024);
|
|
if (buffer == NULL) {
|
|
warn("test_blocking_partial_write: malloc");
|
|
cleanfifo2("testfifo", reader_fd, writer_fd);
|
|
exit(-1);
|
|
}
|
|
bzero(buffer, 512*1024);
|
|
|
|
ret = timed_write(writer_fd, buffer, 512*1024, &len, 5, &timedout,
|
|
__func__);
|
|
if (ret < 0) {
|
|
warn("test_blocking_partial_write: timed_write");
|
|
free(buffer);
|
|
cleanfifo2("testfifo", reader_fd, writer_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
if (!timedout) {
|
|
warnx("test_blocking_partial_write: timed_write: blocking "
|
|
"socket didn't time out");
|
|
free(buffer);
|
|
cleanfifo2("testfifo", reader_fd, writer_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
free(buffer);
|
|
|
|
if (drain_fd(reader_fd, __func__) < 0) {
|
|
cleanfifo2("testfifo", reader_fd, writer_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
cleanfifo2("testfifo", reader_fd, writer_fd);
|
|
}
|
|
|
|
/*
|
|
* Write a 512K buffer to an empty fifo using a non-blocking file descriptor,
|
|
* and make sure it doesn't block.
|
|
*/
|
|
static void
|
|
test_nonblocking_partial_write(void)
|
|
{
|
|
int reader_fd, ret, timedout, writer_fd;
|
|
u_char *buffer;
|
|
ssize_t len;
|
|
|
|
makefifo("testfifo", __func__);
|
|
if (openfifo("testfifo", __func__, &reader_fd, &writer_fd)
|
|
< 0) {
|
|
warn("test_blocking_partial_write: openfifo: testfifo");
|
|
cleanfifo2("testfifo", -1, -1);
|
|
exit(-1);
|
|
}
|
|
|
|
if (set_nonblocking(writer_fd, __func__) < 0) {
|
|
cleanfifo2("testfifo", reader_fd, writer_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
buffer = malloc(512*1024);
|
|
if (buffer == NULL) {
|
|
warn("test_blocking_partial_write: malloc");
|
|
cleanfifo2("testfifo", reader_fd, writer_fd);
|
|
exit(-1);
|
|
}
|
|
bzero(buffer, 512*1024);
|
|
|
|
ret = timed_write(writer_fd, buffer, 512*1024, &len, 5, &timedout,
|
|
__func__);
|
|
if (ret < 0) {
|
|
warn("test_blocking_partial_write: timed_write");
|
|
free(buffer);
|
|
cleanfifo2("testfifo", reader_fd, writer_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
if (timedout) {
|
|
warnx("test_blocking_partial_write: timed_write: "
|
|
"non-blocking socket timed out");
|
|
free(buffer);
|
|
cleanfifo2("testfifo", reader_fd, writer_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
if (len == 0 || len >= 512*1024) {
|
|
warnx("test_blocking_partial_write: timed_write: requested "
|
|
"%d, sent %zd", 512*1024, len);
|
|
free(buffer);
|
|
cleanfifo2("testfifo", reader_fd, writer_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
free(buffer);
|
|
|
|
if (drain_fd(reader_fd, __func__) < 0) {
|
|
cleanfifo2("testfifo", reader_fd, writer_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
cleanfifo2("testfifo", reader_fd, writer_fd);
|
|
}
|
|
|
|
/*
|
|
* test_coalesce_big_read() verifies that data mingles in the fifo across
|
|
* message boundaries by performing two small writes, then a bigger read
|
|
* that should return data from both writes.
|
|
*/
|
|
static void
|
|
test_coalesce_big_read(void)
|
|
{
|
|
int i, reader_fd, writer_fd;
|
|
u_char buffer[10];
|
|
ssize_t len;
|
|
|
|
makefifo("testfifo", __func__);
|
|
if (openfifo("testfifo", __func__, &reader_fd, &writer_fd)
|
|
< 0) {
|
|
warn("test_coalesce_big_read: openfifo: testfifo");
|
|
cleanfifo2("testfifo", -1, -1);
|
|
exit(-1);
|
|
}
|
|
|
|
/* Write five, write five, read ten. */
|
|
for (i = 0; i < 10; i++)
|
|
buffer[i] = i;
|
|
|
|
len = write(writer_fd, buffer, 5);
|
|
if (len < 0) {
|
|
warn("test_coalesce_big_read: write 5");
|
|
cleanfifo2("testfifo", reader_fd, writer_fd);
|
|
exit(-1);
|
|
}
|
|
if (len != 5) {
|
|
warnx("test_coalesce_big_read: write 5 wrote %zd", len);
|
|
cleanfifo2("testfifo", reader_fd, writer_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
len = write(writer_fd, buffer + 5, 5);
|
|
if (len < 0) {
|
|
warn("test_coalesce_big_read: write 5");
|
|
cleanfifo2("testfifo", reader_fd, writer_fd);
|
|
exit(-1);
|
|
}
|
|
if (len != 5) {
|
|
warnx("test_coalesce_big_read: write 5 wrote %zd", len);
|
|
cleanfifo2("testfifo", reader_fd, writer_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
len = read(reader_fd, buffer, 10);
|
|
if (len < 0) {
|
|
warn("test_coalesce_big_read: read 10");
|
|
cleanfifo2("testfifo", reader_fd, writer_fd);
|
|
exit(-1);
|
|
}
|
|
if (len != 10) {
|
|
warnx("test_coalesce_big_read: read 10 read %zd", len);
|
|
cleanfifo2("testfifo", reader_fd, writer_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
for (i = 0; i < 10; i++) {
|
|
if (buffer[i] == i)
|
|
continue;
|
|
warnx("test_coalesce_big_read: expected to read 0x%02x, "
|
|
"read 0x%02x", i, buffer[i]);
|
|
cleanfifo2("testfifo", reader_fd, writer_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
cleanfifo2("testfifo", -1, -1);
|
|
}
|
|
|
|
/*
|
|
* test_coalesce_big_write() verifies that data mingles in the fifo across
|
|
* message boundaries by performing one big write, then two smaller reads
|
|
* that should return sequential elements of data from the write.
|
|
*/
|
|
static void
|
|
test_coalesce_big_write(void)
|
|
{
|
|
int i, reader_fd, writer_fd;
|
|
u_char buffer[10];
|
|
ssize_t len;
|
|
|
|
makefifo("testfifo", __func__);
|
|
if (openfifo("testfifo", __func__, &reader_fd, &writer_fd)
|
|
< 0) {
|
|
warn("test_coalesce_big_write: openfifo: testfifo");
|
|
cleanfifo2("testfifo", -1, -1);
|
|
exit(-1);
|
|
}
|
|
|
|
/* Write ten, read five, read five. */
|
|
for (i = 0; i < 10; i++)
|
|
buffer[i] = i;
|
|
|
|
len = write(writer_fd, buffer, 10);
|
|
if (len < 0) {
|
|
warn("test_coalesce_big_write: write 10");
|
|
cleanfifo2("testfifo", reader_fd, writer_fd);
|
|
exit(-1);
|
|
}
|
|
if (len != 10) {
|
|
warnx("test_coalesce_big_write: write 10 wrote %zd", len);
|
|
cleanfifo2("testfifo", reader_fd, writer_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
len = read(reader_fd, buffer, 5);
|
|
if (len < 0) {
|
|
warn("test_coalesce_big_write: read 5");
|
|
cleanfifo2("testfifo", reader_fd, writer_fd);
|
|
exit(-1);
|
|
}
|
|
if (len != 5) {
|
|
warnx("test_coalesce_big_write: read 5 read %zd", len);
|
|
cleanfifo2("testfifo", reader_fd, writer_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
len = read(reader_fd, buffer + 5, 5);
|
|
if (len < 0) {
|
|
warn("test_coalesce_big_write: read 5");
|
|
cleanfifo2("testfifo", reader_fd, writer_fd);
|
|
exit(-1);
|
|
}
|
|
if (len != 5) {
|
|
warnx("test_coalesce_big_write: read 5 read %zd", len);
|
|
cleanfifo2("testfifo", reader_fd, writer_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
for (i = 0; i < 10; i++) {
|
|
if (buffer[i] == i)
|
|
continue;
|
|
warnx("test_coalesce_big_write: expected to read 0x%02x, "
|
|
"read 0x%02x", i, buffer[i]);
|
|
cleanfifo2("testfifo", reader_fd, writer_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
cleanfifo2("testfifo", -1, -1);
|
|
}
|
|
|
|
static int
|
|
poll_status(int fd, int *readable, int *writable, int *exception,
|
|
const char *testname)
|
|
{
|
|
struct pollfd fds[1];
|
|
|
|
fds[0].fd = fd;
|
|
fds[0].events = POLLIN | POLLOUT | POLLERR;
|
|
fds[0].revents = 0;
|
|
|
|
if (poll(fds, 1, 0) < 0) {
|
|
warn("%s: poll", testname);
|
|
return (-1);
|
|
}
|
|
*readable = (fds[0].revents & POLLIN) ? 1 : 0;
|
|
*writable = (fds[0].revents & POLLOUT) ? 1 : 0;
|
|
*exception = (fds[0].revents & POLLERR) ? 1 : 0;
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
select_status(int fd, int *readable, int *writable, int *exception,
|
|
const char *testname)
|
|
{
|
|
struct fd_set readfds, writefds, exceptfds;
|
|
struct timeval timeout;
|
|
|
|
FD_ZERO(&readfds);
|
|
FD_ZERO(&writefds);
|
|
FD_ZERO(&exceptfds);
|
|
FD_SET(fd, &readfds);
|
|
FD_SET(fd, &writefds);
|
|
FD_SET(fd, &exceptfds);
|
|
timeout.tv_sec = 0;
|
|
timeout.tv_usec = 0;
|
|
if (select(fd+1, &readfds, &writefds, &exceptfds, &timeout) < 0) {
|
|
warn("%s: select", testname);
|
|
return (-1);
|
|
}
|
|
*readable = FD_ISSET(fd, &readfds) ? 1 : 0;
|
|
*writable = FD_ISSET(fd, &writefds) ? 1 : 0;
|
|
*exception = FD_ISSET(fd, &exceptfds) ? 1 : 0;
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* Given an existing kqueue, set up read and write event filters for the
|
|
* passed file descriptor. Typically called once for the read endpoint, and
|
|
* once for the write endpoint.
|
|
*/
|
|
static int
|
|
kqueue_setup(int kqueue_fd, int fd, const char *testname)
|
|
{
|
|
struct kevent kevent_changelist[2];
|
|
struct kevent kevent_eventlist[KQUEUE_MAX_EVENT], *kp;
|
|
struct timespec timeout;
|
|
int i, ret;
|
|
|
|
timeout.tv_sec = 0;
|
|
timeout.tv_nsec = 0;
|
|
|
|
bzero(&kevent_changelist, sizeof(kevent_changelist));
|
|
EV_SET(&kevent_changelist[0], fd, EVFILT_READ, EV_ADD, 0, 0, 0);
|
|
EV_SET(&kevent_changelist[1], fd, EVFILT_WRITE, EV_ADD, 0, 0, 0);
|
|
|
|
bzero(&kevent_eventlist, sizeof(kevent_eventlist));
|
|
ret = kevent(kqueue_fd, kevent_changelist, 2, kevent_eventlist,
|
|
KQUEUE_MAX_EVENT, &timeout);
|
|
if (ret < 0) {
|
|
warn("%s:%s: kevent initial register", testname, __func__);
|
|
return (-1);
|
|
}
|
|
|
|
/*
|
|
* Verify that the events registered alright.
|
|
*/
|
|
for (i = 0; i < ret; i++) {
|
|
kp = &kevent_eventlist[i];
|
|
if (kp->flags != EV_ERROR)
|
|
continue;
|
|
errno = kp->data;
|
|
warn("%s:%s: kevent register index %d", testname, __func__,
|
|
i);
|
|
return (-1);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
kqueue_status(int kqueue_fd, int fd, int *readable, int *writable,
|
|
int *exception, const char *testname)
|
|
{
|
|
struct kevent kevent_eventlist[KQUEUE_MAX_EVENT], *kp;
|
|
struct timespec timeout;
|
|
int i, ret;
|
|
|
|
timeout.tv_sec = 0;
|
|
timeout.tv_nsec = 0;
|
|
|
|
ret = kevent(kqueue_fd, NULL, 0, kevent_eventlist, KQUEUE_MAX_EVENT,
|
|
&timeout);
|
|
if (ret < 0) {
|
|
warn("%s: %s: kevent", testname, __func__);
|
|
return (-1);
|
|
}
|
|
|
|
*readable = *writable = *exception = 0;
|
|
for (i = 0; i < ret; i++) {
|
|
kp = &kevent_eventlist[i];
|
|
if (kp->ident != (u_int)fd)
|
|
continue;
|
|
if (kp->filter == EVFILT_READ)
|
|
*readable = 1;
|
|
if (kp->filter == EVFILT_WRITE)
|
|
*writable = 1;
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
fionread_status(int fd, int *readable, const char *testname)
|
|
{
|
|
int i;
|
|
|
|
if (ioctl(fd, FIONREAD, &i) < 0) {
|
|
warn("%s: ioctl(FIONREAD)", testname);
|
|
return (-1);
|
|
}
|
|
|
|
if (i > 0)
|
|
*readable = 1;
|
|
else
|
|
*readable = 0;
|
|
return (0);
|
|
}
|
|
|
|
#define READABLE 1
|
|
#define WRITABLE 1
|
|
#define EXCEPTION 1
|
|
|
|
#define NOT_READABLE 0
|
|
#define NOT_WRITABLE 0
|
|
#define NOT_EXCEPTION 0
|
|
|
|
static int
|
|
assert_status(int fd, int kqueue_fd, int assert_readable,
|
|
int assert_writable, int assert_exception, const char *testname,
|
|
const char *conditionname, const char *fdname)
|
|
{
|
|
int readable, writable, exception;
|
|
|
|
if (poll_status(fd, &readable, &writable, &exception, testname) < 0)
|
|
return (-1);
|
|
|
|
if (readable != assert_readable || writable != assert_writable ||
|
|
exception != assert_exception) {
|
|
warnx("%s: %s polls r:%d, w:%d, e:%d on %s", testname,
|
|
fdname, readable, writable, exception, conditionname);
|
|
return (-1);
|
|
}
|
|
|
|
if (select_status(fd, &readable, &writable, &exception, testname) < 0)
|
|
return (-1);
|
|
|
|
if (readable != assert_readable || writable != assert_writable ||
|
|
exception != assert_exception) {
|
|
warnx("%s: %s selects r:%d, w:%d, e:%d on %s", testname,
|
|
fdname, readable, writable, exception, conditionname);
|
|
return (-1);
|
|
}
|
|
|
|
if (kqueue_status(kqueue_fd, fd, &readable, &writable, &exception,
|
|
testname) < 0)
|
|
return (-1);
|
|
|
|
if (readable != assert_readable || writable != assert_writable ||
|
|
exception != assert_exception) {
|
|
warnx("%s: %s kevent r:%d, w:%d, e:%d on %s", testname,
|
|
fdname, readable, writable, exception, conditionname);
|
|
return (-1);
|
|
}
|
|
|
|
if (fionread_status(fd, &readable, __func__) < 0)
|
|
return (-1);
|
|
|
|
if (readable != assert_readable) {
|
|
warnx("%s: %s fionread r:%d on %s", testname, fdname,
|
|
readable, conditionname);
|
|
return (-1);
|
|
}
|
|
|
|
return (0);
|
|
}
|
|
|
|
/*
|
|
* test_events() uses poll(), select(), and kevent() to query the status of
|
|
* fifo file descriptors and determine whether they match expected state
|
|
* based on earlier semantic tests: specifically, whether or not poll/select/
|
|
* kevent will correctly inform on readable/writable state following I/O.
|
|
*
|
|
* It would be nice to also test status changes as a result of closing of one
|
|
* or another fifo endpoint.
|
|
*/
|
|
static void
|
|
test_events_outofbox(void)
|
|
{
|
|
int kqueue_fd, reader_fd, writer_fd;
|
|
|
|
makefifo("testfifo", __func__);
|
|
if (openfifo("testfifo", __func__, &reader_fd, &writer_fd) < 0) {
|
|
warn("test_events_outofbox: openfifo: testfifo");
|
|
cleanfifo2("testfifo", -1, -1);
|
|
exit(-1);
|
|
}
|
|
|
|
kqueue_fd = kqueue();
|
|
if (kqueue_fd < 0) {
|
|
warn("%s: kqueue", __func__);
|
|
cleanfifo2("testfifo", reader_fd, writer_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
if (kqueue_setup(kqueue_fd, reader_fd, __func__) < 0) {
|
|
cleanfifo3("testfifo", reader_fd, writer_fd, kqueue_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
if (kqueue_setup(kqueue_fd, writer_fd, __func__) < 0) {
|
|
cleanfifo3("testfifo", reader_fd, writer_fd, kqueue_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
/*
|
|
* Make sure that fresh, out-of-the-box fifo file descriptors have
|
|
* good initial states. The reader_fd should have no active state,
|
|
* since it will not be readable (no data in pipe), writable (it's
|
|
* a read-only descriptor), and there's no reason for error yet.
|
|
*/
|
|
if (assert_status(reader_fd, kqueue_fd, NOT_READABLE, NOT_WRITABLE,
|
|
NOT_EXCEPTION, __func__, "create", "reader_fd") < 0) {
|
|
cleanfifo3("testfifo", reader_fd, writer_fd, kqueue_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
/*
|
|
* Make sure that fresh, out-of-the-box fifo file descriptors have
|
|
* good initial states. The writer_fd should be ready to write.
|
|
*/
|
|
if (assert_status(writer_fd, kqueue_fd, NOT_READABLE, WRITABLE,
|
|
NOT_EXCEPTION, __func__, "create", "writer_fd") < 0) {
|
|
cleanfifo3("testfifo", reader_fd, writer_fd, kqueue_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
cleanfifo3("testfifo", reader_fd, writer_fd, kqueue_fd);
|
|
}
|
|
|
|
static void
|
|
test_events_write_read_byte(void)
|
|
{
|
|
int kqueue_fd, reader_fd, writer_fd;
|
|
ssize_t len;
|
|
u_char ch;
|
|
|
|
makefifo("testfifo", __func__);
|
|
if (openfifo("testfifo", __func__, &reader_fd, &writer_fd)
|
|
< 0) {
|
|
warn("test_events_write_read_byte: openfifo: testfifo");
|
|
cleanfifo2("testfifo", -1, -1);
|
|
exit(-1);
|
|
}
|
|
|
|
kqueue_fd = kqueue();
|
|
if (kqueue_fd < 0) {
|
|
warn("%s: kqueue", __func__);
|
|
cleanfifo2("testfifo", reader_fd, writer_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
if (kqueue_setup(kqueue_fd, reader_fd, __func__) < 0) {
|
|
cleanfifo3("testfifo", reader_fd, writer_fd, kqueue_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
if (kqueue_setup(kqueue_fd, writer_fd, __func__) < 0) {
|
|
cleanfifo3("testfifo", reader_fd, writer_fd, kqueue_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
/*
|
|
* Write a byte to the fifo, and make sure that the read end becomes
|
|
* readable, and that the write end remains writable (small write).
|
|
*/
|
|
ch = 0x00;
|
|
len = write(writer_fd, &ch, sizeof(ch));
|
|
if (len < 0) {
|
|
warn("%s: write", __func__);
|
|
cleanfifo3("testfifo", reader_fd, writer_fd, kqueue_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
if (assert_status(reader_fd, kqueue_fd, READABLE, NOT_WRITABLE,
|
|
NOT_EXCEPTION, __func__, "write", "reader_fd") < 0) {
|
|
cleanfifo3("testfifo", reader_fd, writer_fd, kqueue_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
/*
|
|
* the writer_fd should remain writable.
|
|
*/
|
|
if (assert_status(writer_fd, kqueue_fd, NOT_READABLE, WRITABLE,
|
|
NOT_EXCEPTION, __func__, "write", "writer_fd") < 0) {
|
|
cleanfifo3("testfifo", reader_fd, writer_fd, kqueue_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
/*
|
|
* Read the byte from the reader_fd, and now confirm that that fifo
|
|
* becomes unreadable.
|
|
*/
|
|
len = read(reader_fd, &ch, sizeof(ch));
|
|
if (len < 0) {
|
|
warn("%s: read", __func__);
|
|
cleanfifo3("testfifo", reader_fd, writer_fd, kqueue_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
if (assert_status(reader_fd, kqueue_fd, NOT_READABLE, NOT_WRITABLE,
|
|
NOT_EXCEPTION, __func__, "write+read", "reader_fd") < 0) {
|
|
cleanfifo3("testfifo", reader_fd, writer_fd, kqueue_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
/*
|
|
* The writer_fd should remain writable.
|
|
*/
|
|
if (assert_status(writer_fd, kqueue_fd, NOT_READABLE, WRITABLE,
|
|
NOT_EXCEPTION, __func__, "write+read", "writer_fd") < 0) {
|
|
cleanfifo3("testfifo", reader_fd, writer_fd, kqueue_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
cleanfifo3("testfifo", reader_fd, writer_fd, kqueue_fd);
|
|
}
|
|
|
|
/*
|
|
* Write a 512k buffer to the fifo in non-blocking mode, and make sure that
|
|
* the write end becomes un-writable as a result of a partial write that
|
|
* fills the fifo buffer.
|
|
*/
|
|
static void
|
|
test_events_partial_write(void)
|
|
{
|
|
int kqueue_fd, reader_fd, writer_fd;
|
|
u_char *buffer;
|
|
ssize_t len;
|
|
|
|
makefifo("testfifo", __func__);
|
|
if (openfifo("testfifo", __func__, &reader_fd, &writer_fd)
|
|
< 0) {
|
|
warn("test_events_partial_write: openfifo: testfifo");
|
|
cleanfifo2("testfifo", -1, -1);
|
|
exit(-1);
|
|
}
|
|
|
|
kqueue_fd = kqueue();
|
|
if (kqueue_fd < 0) {
|
|
warn("%s: kqueue", __func__);
|
|
cleanfifo2("testfifo", reader_fd, writer_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
if (kqueue_setup(kqueue_fd, reader_fd, __func__) < 0) {
|
|
cleanfifo3("testfifo", reader_fd, writer_fd, kqueue_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
if (kqueue_setup(kqueue_fd, writer_fd, __func__) < 0) {
|
|
cleanfifo3("testfifo", reader_fd, writer_fd, kqueue_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
if (set_nonblocking(writer_fd, "test_events") < 0) {
|
|
cleanfifo3("testfifo", reader_fd, writer_fd, kqueue_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
buffer = malloc(512*1024);
|
|
if (buffer == NULL) {
|
|
warn("test_events_partial_write: malloc");
|
|
cleanfifo3("testfifo", reader_fd, writer_fd, kqueue_fd);
|
|
exit(-1);
|
|
}
|
|
bzero(buffer, 512*1024);
|
|
|
|
len = write(writer_fd, buffer, 512*1024);
|
|
if (len < 0) {
|
|
warn("test_events_partial_write: write");
|
|
free(buffer);
|
|
cleanfifo3("testfifo", reader_fd, writer_fd, kqueue_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
free(buffer);
|
|
|
|
if (assert_status(writer_fd, kqueue_fd, NOT_READABLE, NOT_WRITABLE,
|
|
NOT_EXCEPTION, __func__, "big write", "writer_fd") < 0) {
|
|
cleanfifo3("testfifo", reader_fd, writer_fd, kqueue_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
if (drain_fd(reader_fd, "test_events") < 0) {
|
|
cleanfifo3("testfifo", reader_fd, writer_fd, kqueue_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
/*
|
|
* Test that the writer_fd has been restored to writable state after
|
|
* draining.
|
|
*/
|
|
if (assert_status(writer_fd, kqueue_fd, NOT_READABLE, WRITABLE,
|
|
NOT_EXCEPTION, __func__, "big write + drain", "writer_fd") < 0) {
|
|
cleanfifo3("testfifo", reader_fd, writer_fd, kqueue_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
cleanfifo3("testfifo", reader_fd, writer_fd, kqueue_fd);
|
|
}
|
|
|
|
/*
|
|
* We don't comprehensively test O_RDWR file descriptors, but do run a couple
|
|
* of event tests to make sure that the fifo implementation doesn't mixed up
|
|
* status checks. In particular, at least one past FreeBSD bug exists in
|
|
* which the FIONREAD test was performed on the wrong socket implementing the
|
|
* fifo, resulting in the fifo never returning readable.
|
|
*/
|
|
static void
|
|
test_events_rdwr(void)
|
|
{
|
|
int fd, kqueue_fd;
|
|
ssize_t len;
|
|
char ch;
|
|
|
|
makefifo("testfifo", __func__);
|
|
if (openfifo_rw("testfifo", __func__, &fd)
|
|
< 0) {
|
|
warn("%s: openfifo_rw: testfifo", __func__);
|
|
cleanfifo2("testfifo", -1, -1);
|
|
exit(-1);
|
|
}
|
|
|
|
kqueue_fd = kqueue();
|
|
if (kqueue_fd < 0) {
|
|
warn("%s: kqueue", __func__);
|
|
cleanfifo2("testifo", fd, -1);
|
|
exit(-1);
|
|
}
|
|
|
|
if (kqueue_setup(kqueue_fd, fd, __func__) < 0) {
|
|
cleanfifo2("testfifo", fd, kqueue_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
/*
|
|
* On first creation, the O_RDWR descriptor should be writable but
|
|
* not readable.
|
|
*/
|
|
if (assert_status(fd, kqueue_fd, NOT_READABLE, WRITABLE,
|
|
NOT_EXCEPTION, __func__, "create", "fd") < 0) {
|
|
cleanfifo2("testfifo", fd, kqueue_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
/*
|
|
* Write a byte, which should cause the file descriptor to become
|
|
* readable and writable.
|
|
*/
|
|
ch = 0x00;
|
|
len = write(fd, &ch, sizeof(ch));
|
|
if (len < 0) {
|
|
warn("%s: write", __func__);
|
|
cleanfifo2("testfifo", fd, kqueue_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
if (assert_status(fd, kqueue_fd, READABLE, WRITABLE, NOT_EXCEPTION,
|
|
__func__, "write", "fd") < 0) {
|
|
cleanfifo2("testfifo", fd, kqueue_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
/*
|
|
* Read a byte, which should cause the file descriptor to return to
|
|
* simply being writable.
|
|
*/
|
|
len = read(fd, &ch, sizeof(ch));
|
|
if (len < 0) {
|
|
warn("%s: read", __func__);
|
|
cleanfifo2("testfifo", fd, kqueue_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
if (assert_status(fd, kqueue_fd, NOT_READABLE, WRITABLE,
|
|
NOT_EXCEPTION, __func__, "write+read", "fd") < 0) {
|
|
cleanfifo2("testfifo", fd, kqueue_fd);
|
|
exit(-1);
|
|
}
|
|
|
|
cleanfifo2("testfifo", fd, kqueue_fd);
|
|
}
|
|
|
|
int
|
|
main(int argc, char *argv[])
|
|
{
|
|
|
|
strcpy(temp_dir, "/tmp/fifo_io.XXXXXXXXXXX");
|
|
if (mkdtemp(temp_dir) == NULL)
|
|
err(-1, "mkdtemp");
|
|
atexit(atexit_temp_dir);
|
|
|
|
if (chdir(temp_dir) < 0)
|
|
err(-1, "chdir %s", temp_dir);
|
|
|
|
test_simpleio();
|
|
test_blocking_read_empty();
|
|
test_blocking_one_byte();
|
|
test_nonblocking_one_byte();
|
|
test_blocking_partial_write();
|
|
test_nonblocking_partial_write();
|
|
test_coalesce_big_read();
|
|
test_coalesce_big_write();
|
|
test_events_outofbox();
|
|
test_events_write_read_byte();
|
|
test_events_partial_write();
|
|
test_events_rdwr();
|
|
|
|
return (0);
|
|
}
|