android13/external/ltp/testcases/kernel/syscalls/poll/poll01.c

107 lines
1.7 KiB
C

// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Copyright (c) International Business Machines Corp., 2001
* Ported to LTP: Wayne Boyer
* Copyright (C) 2015 Cyril Hrubis <chrubis@suse.cz>
*/
/*
* Check that poll() works for POLLOUT and POLLIN and that revents is set
* correctly.
*/
#include <unistd.h>
#include <errno.h>
#include <fcntl.h>
#include <sys/wait.h>
#include <sys/poll.h>
#include "tst_test.h"
#define BUF_SIZE 512
static int fildes[2];
static void verify_pollout(void)
{
struct pollfd outfds[] = {
{.fd = fildes[1], .events = POLLOUT},
};
TEST(poll(outfds, 1, -1));
if (TST_RET == -1) {
tst_res(TFAIL | TTERRNO, "poll() POLLOUT failed");
return;
}
if (outfds[0].revents != POLLOUT) {
tst_res(TFAIL | TTERRNO, "poll() failed to set POLLOUT");
return;
}
tst_res(TPASS, "poll() POLLOUT");
}
static void verify_pollin(void)
{
char write_buf[] = "Testing";
char read_buf[BUF_SIZE];
struct pollfd infds[] = {
{.fd = fildes[0], .events = POLLIN},
};
SAFE_WRITE(1, fildes[1], write_buf, sizeof(write_buf));
TEST(poll(infds, 1, -1));
if (TST_RET == -1) {
tst_res(TFAIL | TTERRNO, "poll() POLLIN failed");
goto end;
}
if (infds[0].revents != POLLIN) {
tst_res(TFAIL, "poll() failed to set POLLIN");
goto end;
}
tst_res(TPASS, "poll() POLLIN");
end:
SAFE_READ(1, fildes[0], read_buf, sizeof(write_buf));
}
void verify_poll(unsigned int n)
{
switch (n) {
case 0:
verify_pollout();
break;
case 1:
verify_pollin();
break;
}
}
static void setup(void)
{
SAFE_PIPE(fildes);
}
static void cleanup(void)
{
if (fildes[0] > 0)
SAFE_CLOSE(fildes[0]);
if (fildes[1] > 0)
SAFE_CLOSE(fildes[1]);
}
static struct tst_test test = {
.setup = setup,
.cleanup = cleanup,
.test = verify_poll,
.tcnt = 2,
};