76 lines
1.3 KiB
C
76 lines
1.3 KiB
C
/* 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 <sys/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;
|
|
}
|