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#include "../config-host.h"
/* SPDX-License-Identifier: MIT */
/*
* Description: test that pathname resolution works from async context when
* using /proc/self/ which should be the original submitting task, not the
* async worker.
*
*/
#include <errno.h>
#include <stdio.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <fcntl.h>
#include "liburing.h"
static int io_openat2(struct io_uring *ring, const char *path, int dfd)
{
struct io_uring_cqe *cqe;
struct io_uring_sqe *sqe;
struct open_how how;
int ret;
sqe = io_uring_get_sqe(ring);
if (!sqe) {
fprintf(stderr, "get sqe failed\n");
goto err;
}
memset(&how, 0, sizeof(how));
how.flags = O_RDONLY;
io_uring_prep_openat2(sqe, dfd, path, &how);
ret = io_uring_submit(ring);
if (ret <= 0) {
fprintf(stderr, "sqe submit failed: %d\n", ret);
goto err;
}
ret = io_uring_wait_cqe(ring, &cqe);
if (ret < 0) {
fprintf(stderr, "wait completion %d\n", ret);
goto err;
}
ret = cqe->res;
io_uring_cqe_seen(ring, cqe);
return ret;
err:
return -1;
}
int main(int argc, char *argv[])
{
struct io_uring ring;
char buf[64];
int ret;
if (argc > 1)
return 0;
ret = io_uring_queue_init(1, &ring, 0);
if (ret) {
fprintf(stderr, "ring setup failed\n");
return 1;
}
ret = io_openat2(&ring, "/proc/self/comm", -1);
if (ret < 0) {
if (ret == -EOPNOTSUPP)
return 0;
if (ret == -EINVAL) {
fprintf(stdout, "openat2 not supported, skipping\n");
return 0;
}
fprintf(stderr, "openat2 failed: %s\n", strerror(-ret));
return 1;
}
memset(buf, 0, sizeof(buf));
ret = read(ret, buf, sizeof(buf));
if (ret < 0) {
perror("read");
return 1;
}
if (strncmp(buf, "self", 4)) {
fprintf(stderr, "got comm=<%s>, wanted <self>\n", buf);
return 1;
}
return 0;
}
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