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/* SPDX-License-Identifier: MIT */
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include <sys/types.h>
#include <poll.h>
#include "helpers.h"
#include "liburing.h"
#define BUF_SIZE 4096
#define FILE_SIZE 1024
int main(int argc, char *argv[])
{
int ret, fd, save_errno;
struct io_uring ring;
struct io_uring_sqe *sqe;
struct io_uring_cqe *cqe;
struct iovec vec;
if (argc > 1)
return 0;
vec.iov_base = t_malloc(BUF_SIZE);
vec.iov_len = BUF_SIZE;
t_create_file(".short-read", FILE_SIZE);
fd = open(".short-read", O_RDONLY);
save_errno = errno;
unlink(".short-read");
errno = save_errno;
if (fd < 0) {
perror("file open");
return 1;
}
ret = io_uring_queue_init(32, &ring, 0);
if (ret) {
fprintf(stderr, "queue init failed: %d\n", ret);
return ret;
}
sqe = io_uring_get_sqe(&ring);
if (!sqe) {
fprintf(stderr, "sqe get failed\n");
return 1;
}
io_uring_prep_readv(sqe, fd, &vec, 1, 0);
ret = io_uring_submit(&ring);
if (ret != 1) {
fprintf(stderr, "submit failed: %d\n", ret);
return 1;
}
ret = io_uring_wait_cqes(&ring, &cqe, 1, 0, 0);
if (ret) {
fprintf(stderr, "wait_cqe failed: %d\n", ret);
return 1;
}
if (cqe->res != FILE_SIZE) {
fprintf(stderr, "Read failed: %d\n", cqe->res);
return 1;
}
io_uring_cqe_seen(&ring, cqe);
return 0;
}
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