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/* SPDX-License-Identifier: MIT */
/*
* Test that closed pipe reads returns 0, instead of waiting for more
* data.
*/
#include <errno.h>
#include <stdio.h>
#include <string.h>
#include <unistd.h>
#include <pthread.h>
#include <string.h>
#include "liburing.h"
#include "helpers.h"
#define BUFSIZE 512
struct data {
char *str;
int fds[2];
};
static void *t(void *data)
{
struct data *d = data;
int ret;
strcpy(d->str, "This is a test string");
ret = write(d->fds[1], d->str, strlen(d->str));
close(d->fds[1]);
if (ret < 0)
perror("write");
return NULL;
}
int main(int argc, char *argv[])
{
static char buf[BUFSIZE];
struct io_uring ring;
pthread_t thread;
struct data d;
int ret;
if (argc > 1)
return T_EXIT_SKIP;
if (pipe(d.fds) < 0) {
perror("pipe");
return 1;
}
d.str = buf;
ret = io_uring_queue_init(8, &ring, 0);
if (ret == -ENOMEM) {
return T_EXIT_SKIP;
} else if (ret) {
fprintf(stderr, "queue_init: %d\n", ret);
return T_EXIT_FAIL;
}
pthread_create(&thread, NULL, t, &d);
while (1) {
struct io_uring_sqe *sqe;
struct io_uring_cqe *cqe;
sqe = io_uring_get_sqe(&ring);
io_uring_prep_read(sqe, d.fds[0], buf, BUFSIZE, 0);
ret = io_uring_submit(&ring);
if (ret != 1) {
fprintf(stderr, "submit: %d\n", ret);
return 1;
}
ret = io_uring_wait_cqe(&ring, &cqe);
if (ret) {
fprintf(stderr, "wait: %d\n", ret);
return 1;
}
if (cqe->res < 0) {
fprintf(stderr, "Read error: %s\n", strerror(-cqe->res));
return 1;
}
if (cqe->res == 0)
break;
io_uring_cqe_seen(&ring, cqe);
}
pthread_join(thread, NULL);
io_uring_queue_exit(&ring);
return 0;
}
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