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/*
* Description: test io_uring poll handling
*
*/
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <signal.h>
#include <sys/poll.h>
#include <sys/wait.h>
#include "liburing.h"
static void sig_alrm(int sig)
{
printf("Timed out!\n");
exit(1);
}
int main(int argc, char *argv[])
{
struct io_uring_cqe *cqe;
struct io_uring_sqe *sqe;
struct io_uring ring;
int pipe1[2];
pid_t p;
int ret;
if (pipe(pipe1) != 0) {
printf("pipe failed\n");
return 1;
}
p = fork();
switch (p) {
case -1:
printf("fork failed\n");
exit(2);
case 0: {
struct sigaction act;
ret = io_uring_queue_init(1, &ring, 0);
if (ret) {
printf("child: ring setup failed\n");
return 1;
}
memset(&act, 0, sizeof(act));
act.sa_handler = sig_alrm;
act.sa_flags = SA_RESTART;
sigaction(SIGALRM, &act, NULL);
alarm(1);
sqe = io_uring_get_sqe(&ring);
if (!sqe) {
printf("child: get sqe failed\n");
return 1;
}
io_uring_prep_poll_add(sqe, pipe1[0], POLLIN);
io_uring_sqe_set_data(sqe, sqe);
ret = io_uring_submit(&ring);
if (ret <= 0) {
printf("child: sqe submit failed\n");
return 1;
}
do {
ret = io_uring_wait_cqe(&ring, &cqe);
if (ret < 0) {
printf("child: wait completion %d\n", ret);
break;
}
io_uring_cqe_seen(&ring, cqe);
} while (ret != 0);
if (ret < 0) {
printf("child: completion get failed\n");
return 1;
}
if (cqe->user_data != (unsigned long) sqe) {
printf("child: cqe doesn't match sqe\n");
return 1;
}
if ((cqe->res & POLLIN) != POLLIN) {
printf("child: bad return value %ld\n", (long) cqe->res);
return 1;
}
exit(0);
}
default:
do {
errno = 0;
ret = write(pipe1[1], "foo", 3);
} while (ret == -1 && errno == EINTR);
if (ret != 3) {
printf("parent: bad write return %d\n", ret);
return 1;
}
return 0;
}
}
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