114 lines
2.4 KiB
C
114 lines
2.4 KiB
C
/* SPDX-License-Identifier: MIT */
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/*
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* Description: test io_uring symlinkat handling
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*/
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#include <fcntl.h>
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#include <stdio.h>
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#include <string.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <unistd.h>
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#include "liburing.h"
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static int do_symlinkat(struct io_uring *ring, const char *oldname, const char *newname)
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{
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int ret;
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struct io_uring_sqe *sqe;
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struct io_uring_cqe *cqe;
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sqe = io_uring_get_sqe(ring);
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if (!sqe) {
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fprintf(stderr, "sqe get failed\n");
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goto err;
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}
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io_uring_prep_symlinkat(sqe, oldname, AT_FDCWD, newname);
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ret = io_uring_submit(ring);
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if (ret != 1) {
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fprintf(stderr, "submit failed: %d\n", ret);
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goto err;
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}
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ret = io_uring_wait_cqes(ring, &cqe, 1, 0, 0);
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if (ret) {
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fprintf(stderr, "wait_cqe failed: %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 test_link_contents(const char* linkname, const char *expected_contents)
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{
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char buf[128];
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int ret = readlink(linkname, buf, 127);
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if (ret < 0) {
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perror("readlink");
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return ret;
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}
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buf[ret] = 0;
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if (strncmp(buf, expected_contents, 128)) {
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fprintf(stderr, "link contents differs from expected: '%s' vs '%s'",
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buf, expected_contents);
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return -1;
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}
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return 0;
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}
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int main(int argc, char *argv[])
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{
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static const char target[] = "io_uring-symlinkat-test-target";
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static const char linkname[] = "io_uring-symlinkat-test-link";
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int ret;
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struct io_uring ring;
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ret = io_uring_queue_init(8, &ring, 0);
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if (ret) {
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fprintf(stderr, "queue init failed: %d\n", ret);
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return ret;
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}
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ret = do_symlinkat(&ring, target, linkname);
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if (ret < 0) {
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if (ret == -EBADF || ret == -EINVAL) {
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fprintf(stdout, "symlinkat not supported, skipping\n");
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goto out;
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}
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fprintf(stderr, "symlinkat: %s\n", strerror(-ret));
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goto err;
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} else if (ret) {
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goto err;
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}
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ret = test_link_contents(linkname, target);
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if (ret < 0)
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goto err1;
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ret = do_symlinkat(&ring, target, linkname);
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if (ret != -EEXIST) {
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fprintf(stderr, "test_symlinkat linkname already exists failed: %d\n", ret);
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goto err1;
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}
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ret = do_symlinkat(&ring, target, "surely/this/does/not/exist");
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if (ret != -ENOENT) {
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fprintf(stderr, "test_symlinkat no parent failed: %d\n", ret);
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goto err1;
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}
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out:
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unlinkat(AT_FDCWD, linkname, 0);
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io_uring_queue_exit(&ring);
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return 0;
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err1:
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unlinkat(AT_FDCWD, linkname, 0);
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err:
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io_uring_queue_exit(&ring);
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return 1;
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}
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