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/* $FreeBSD$ */
#define _GNU_SOURCE /* expose POLLRDHUP when testing on Linux */
#include <sys/socket.h>
#include <sys/stat.h>
#include <err.h>
#include <fcntl.h>
#include <poll.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
static void
append(char *out, size_t out_size, const char *s)
{
size_t size = strlen(out);
snprintf(out + size, out_size - size, "%s", s);
}
static void
decode_events(int events, char *out, size_t out_size)
{
int unknown;
out[0] = 0;
if (events == 0) {
append(out, out_size, "0");
return;
}
#define DECODE_FLAG(x) \
if (events & (x)) { \
if (out[0] != 0) \
append(out, out_size, " | "); \
append(out, out_size, #x); \
}
/* Show the expected flags by name. */
DECODE_FLAG(POLLIN);
DECODE_FLAG(POLLOUT);
DECODE_FLAG(POLLHUP);
#ifndef POLLRDHUP
#define KNOWN_FLAGS (POLLIN | POLLOUT | POLLHUP)
#else
DECODE_FLAG(POLLRDHUP);
#define KNOWN_FLAGS (POLLIN | POLLOUT | POLLHUP | POLLRDHUP);
#endif
/* Show any unexpected bits as hex. */
unknown = events & ~KNOWN_FLAGS;
if (unknown != 0) {
char buf[80];
snprintf(buf, sizeof(buf), "%s%x", out[0] != 0 ? " | " : "",
unknown);
append(out, out_size, buf);
}
}
static void
report(int num, const char *state, int expected, int got)
{
char expected_str[80];
char got_str[80];
decode_events(expected, expected_str, sizeof(expected_str));
decode_events(got, got_str, sizeof(got_str));
if (expected == got)
printf("ok %-2d ", num);
else
printf("not ok %-2d", num);
printf(" state %s: expected %s; got %s\n",
state, expected_str, got_str);
fflush(stdout);
}
static int
set_nonblocking(int sck)
{
int flags;
flags = fcntl(sck, F_GETFL, 0);
flags |= O_NONBLOCK;
if (fcntl(sck, F_SETFL, flags))
return -1;
return 0;
}
static char largeblock[1048576]; /* should be more than AF_UNIX sockbuf size */
static int fd[2];
static struct pollfd pfd0;
static struct pollfd pfd1;
void
setup(void)
{
if (socketpair(AF_UNIX, SOCK_STREAM, 0, fd) != 0)
err(1, "socketpair");
if (set_nonblocking(fd[0]) == -1)
err(1, "fcntl");
if (set_nonblocking(fd[1]) == -1)
err(1, "fcntl");
pfd0.fd = fd[0];
pfd0.events = POLLIN | POLLOUT;
pfd1.fd = fd[1];
pfd1.events = POLLIN | POLLOUT;
}
int
main(void)
{
int num;
num = 1;
printf("1..18\n");
fflush(stdout);
/* Large write with close */
setup();
if (poll(&pfd0, 1, 0) == -1)
err(1, "poll");
report(num++, "initial 0", POLLOUT, pfd0.revents);
if (poll(&pfd1, 1, 0) == -1)
err(1, "poll");
report(num++, "initial 1", POLLOUT, pfd1.revents);
if (write(fd[0], largeblock, sizeof(largeblock)) == -1)
err(1, "write");
if (poll(&pfd0, 1, 0) == -1)
err(1, "poll");
report(num++, "after large write", 0, pfd0.revents);
if (poll(&pfd1, 1, 0) == -1)
err(1, "poll");
report(num++, "other side after large write", POLLIN | POLLOUT, pfd1.revents);
close(fd[0]);
if (poll(&pfd1, 1, 0) == -1)
err(1, "poll");
report(num++, "other side after close", POLLIN | POLLHUP, pfd1.revents);
if (read(fd[1], largeblock, sizeof(largeblock)) == -1)
err(1, "read");
if (poll(&pfd1, 1, 0) == -1)
err(1, "poll");
report(num++, "other side after reading input", POLLHUP, pfd1.revents);
close(fd[1]);
/* With shutdown(SHUT_WR) */
setup();
if (shutdown(fd[0], SHUT_WR) == -1)
err(1, "shutdown");
if (poll(&pfd0, 1, 0) == -1)
err(1, "poll");
report(num++, "after shutdown(SHUT_WR)", POLLOUT, pfd0.revents);
if (poll(&pfd1, 1, 0) == -1)
err(1, "poll");
report(num++, "other side after shutdown(SHUT_WR)", POLLIN | POLLOUT, pfd1.revents);
switch (read(fd[1], largeblock, sizeof(largeblock))) {
case 0:
break;
case -1:
err(1, "read after other side shutdown");
break;
default:
errx(1, "kernel made up data that was never written");
}
if (poll(&pfd1, 1, 0) == -1)
err(1, "poll");
report(num++, "other side after reading EOF", POLLIN | POLLOUT, pfd1.revents);
if (write(fd[1], largeblock, sizeof(largeblock)) == -1)
err(1, "write");
if (poll(&pfd0, 1, 0) == -1)
err(1, "poll");
report(num++, "after data from other side", POLLIN | POLLOUT, pfd0.revents);
if (poll(&pfd1, 1, 0) == -1)
err(1, "poll");
report(num++, "after writing", POLLIN, pfd1.revents);
if (shutdown(fd[1], SHUT_WR) == -1)
err(1, "shutdown second");
if (poll(&pfd0, 1, 0) == -1)
err(1, "poll");
report(num++, "after second shutdown", POLLIN | POLLHUP, pfd0.revents);
if (poll(&pfd1, 1, 0) == -1)
err(1, "poll");
report(num++, "after second shutdown", POLLHUP, pfd1.revents);
close(fd[0]);
if (poll(&pfd1, 1, 0) == -1)
err(1, "poll");
report(num++, "after close", POLLHUP, pfd1.revents);
close(fd[1]);
/*
* With shutdown(SHUT_RD)
* Note that shutdown(SHUT_WR) is passed to the peer, but
* shutdown(SHUT_RD) is not.
*/
setup();
if (shutdown(fd[0], SHUT_RD) == -1)
err(1, "shutdown");
if (poll(&pfd0, 1, 0) == -1)
err(1, "poll");
report(num++, "after shutdown(SHUT_RD)", POLLIN | POLLOUT, pfd0.revents);
if (poll(&pfd1, 1, 0) == -1)
err(1, "poll");
report(num++, "other side after shutdown(SHUT_RD)", POLLOUT, pfd1.revents);
if (shutdown(fd[0], SHUT_WR) == -1)
err(1, "shutdown");
if (poll(&pfd0, 1, 0) == -1)
err(1, "poll");
report(num++, "after shutdown(SHUT_WR)", POLLHUP, pfd0.revents);
if (poll(&pfd1, 1, 0) == -1)
err(1, "poll");
report(num++, "other side after shutdown(SHUT_WR)", POLLIN | POLLOUT, pfd1.revents);
close(fd[0]);
close(fd[1]);
#ifdef POLLRDHUP
setup();
pfd1.events |= POLLRDHUP;
if (shutdown(fd[0], SHUT_RD) == -1)
err(1, "shutdown");
if (poll(&pfd1, 1, 0) == -1)
err(1, "poll");
report(num++, "other side after shutdown(SHUT_RD)", POLLOUT, pfd1.revents);
if (write(fd[0], "x", 1) != 1)
err(1, "write");
if (poll(&pfd1, 1, 0) == -1)
err(1, "poll");
report(num++, "other side after write", POLLIN | POLLOUT, pfd1.revents);
if (shutdown(fd[0], SHUT_WR) == -1)
err(1, "shutdown");
if (poll(&pfd1, 1, 0) == -1)
err(1, "poll");
report(num++, "other side after shutdown(SHUT_WR)", POLLIN | POLLOUT | POLLRDHUP, pfd1.revents);
close(fd[0]);
close(fd[1]);
#endif
return (0);
}
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