/*
* 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", &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);
}
/*
* 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);
}
static void
cleanfifo3(const char *fifoname, int fd1, int fd2, int fd3)
{
if (fd3 != -1)
close(fd3);
cleanfifo2(fifoname, fd1, fd2);
}
/*
* Simple I/O test: write ten integers, and make sure we get back the same
* integers in the same order. This assumes a minimum fifo buffer > 10
* bytes in order to not block and deadlock.
*/
static void
test_simpleio(void)
{
int i, reader_fd, writer_fd;
u_char buffer[10];
ssize_t len;
makefifo("testfifo", __func__);
if (openfifo("testfifo", &reader_fd, &writer_fd)
< 0) {
warn("test_simpleio: openfifo: testfifo");
cleanfifo2("testfifo", -1, -1);
exit(-1);
}
for (i = 0; i < 10; i++)
buffer[i] = i;
len = write(writer_fd, (char *)buffer, sizeof(buffer));
if (len < 0) {
warn("test_simpleio: write");
cleanfifo2("testfifo", reader_fd, writer_fd);
exit(-1);
}
if (len != sizeof(buffer)) {
warnx("test_simplio: tried %zu but wrote %zd", sizeof(buffer),
len);
cleanfifo2("testfifo", reader_fd, writer_fd);
exit(-1);
}
len = read(reader_fd, (char *)buffer, sizeof(buffer));
if (len < 0) {
warn("test_simpleio: read");
cleanfifo2("testfifo", reader_fd, writer_fd);
exit(-1);
}
if (len != sizeof(buffer)) {
warnx("test_simpleio: tried %zu but read %zd", sizeof(buffer),
len);
cleanfifo2("testfifo", reader_fd, writer_fd);
exit(-1);
}
for (i = 0; i < 10; i++) {
if (buffer[i] == i)
continue;
warnx("test_simpleio: write byte %d as 0x%02x, but read "
"0x%02x", i, i, buffer[i]);
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);
}
/*
* 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", &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);
}
/*
* 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", &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);
}
/*
* This test operates on blocking and non-blocking fifo file descriptors, in
* order to determine whether they block at good moments or not. By good we
* mean: don't block for non-blocking sockets, and do block for blocking
* ones, assuming there isn't I/O buffer to satisfy the request.
*
* We use a timeout of 5 seconds, concluding that in 5 seconds either all I/O
* that can take place will, and that if we reach the end of the timeout,
* then blocking has occurred.
*
* We assume that the buffer size on a fifo is <512K, and as such, that
* writing that much data without an active reader will result in blocking.
*/
static void
test_blocking_read_empty(void)
{
int reader_fd, ret, timedout, writer_fd;
ssize_t len;
u_char ch;
makefifo("testfifo", __func__);
if (openfifo("testfifo", &reader_fd, &writer_fd)
< 0) {
warn("test_blocking_read_empty: openfifo: testfifo");
cleanfifo2("testfifo", -1, -1);
exit(-1);
}
/*
* Read one byte from an empty blocking fifo, block as there is no
* data.
*/
if (set_blocking(reader_fd, __func__) < 0) {
cleanfifo2("testfifo", reader_fd, writer_fd);
exit(-1);
}
ret = timed_read(reader_fd, &ch, sizeof(ch), &len, 5, &timedout,
__func__);
if (ret != -1) {
warnx("test_blocking_read_empty: timed_read: returned "
"success");
cleanfifo2("testfifo", reader_fd, writer_fd);
exit(-1);
}
if (errno != EINTR) {
warn("test_blocking_read_empty: timed_read");
cleanfifo2("testfifo", reader_fd, writer_fd);
exit(-1);
}
/*
* Read one byte from an empty non-blocking fifo, return EAGAIN as
* there is no data.
*/
if (set_nonblocking(reader_fd, __func__) < 0) {
cleanfifo2("testfifo", reader_fd, writer_fd);
exit(-1);
}
ret = timed_read(reader_fd, &ch, sizeof(ch), &len, 5, &timedout,
__func__);
if (ret != -1) {
warnx("test_blocking_read_empty: timed_read: returned "
"success");
cleanfifo2("testfifo", reader_fd, writer_fd);
exit(-1);
}
if (errno != EAGAIN) {
warn("test_blocking_read_empty: timed_read");
cleanfifo2("testfifo", reader_fd, writer_fd);
exit(-1);
}
cleanfifo2("testfifo", reader_fd, writer_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", &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);
}
/*
* 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", &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);
}
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", &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);
}
