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