193 lines
7.4 KiB
Rust
193 lines
7.4 KiB
Rust
use more_asserts::assert_gt;
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use std::{env, process};
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use wasi_tests::{assert_errno, create_file, open_scratch_directory, TESTCONFIG};
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unsafe fn test_path_rename(dir_fd: wasi::Fd) {
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// First, try renaming a dir to nonexistent path
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// Create source directory
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wasi::path_create_directory(dir_fd, "source").expect("creating a directory");
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// Try renaming the directory
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wasi::path_rename(dir_fd, "source", dir_fd, "target").expect("renaming a directory");
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// Check that source directory doesn't exist anymore
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assert_errno!(
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wasi::path_open(dir_fd, 0, "source", wasi::OFLAGS_DIRECTORY, 0, 0, 0)
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.expect_err("opening a nonexistent path as a directory should fail")
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.raw_error(),
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wasi::ERRNO_NOENT
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);
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// Check that target directory exists
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let mut fd = wasi::path_open(dir_fd, 0, "target", wasi::OFLAGS_DIRECTORY, 0, 0, 0)
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.expect("opening renamed path as a directory");
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assert_gt!(
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fd,
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libc::STDERR_FILENO as wasi::Fd,
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"file descriptor range check",
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);
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wasi::fd_close(fd).expect("closing a file");
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wasi::path_remove_directory(dir_fd, "target").expect("removing a directory");
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// Yes, renaming a dir to an empty dir is a property guaranteed by rename(2)
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// and its fairly important that it is atomic.
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// But, we haven't found a way to emulate it on windows. So, sometimes this
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// behavior is just hosed. Sorry.
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if TESTCONFIG.support_rename_dir_to_empty_dir() {
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// Now, try renaming renaming a dir to existing empty dir
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wasi::path_create_directory(dir_fd, "source").expect("creating a directory");
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wasi::path_create_directory(dir_fd, "target").expect("creating a directory");
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wasi::path_rename(dir_fd, "source", dir_fd, "target").expect("renaming a directory");
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// Check that source directory doesn't exist anymore
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assert_errno!(
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wasi::path_open(dir_fd, 0, "source", wasi::OFLAGS_DIRECTORY, 0, 0, 0)
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.expect_err("opening a nonexistent path as a directory")
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.raw_error(),
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wasi::ERRNO_NOENT
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);
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// Check that target directory exists
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fd = wasi::path_open(dir_fd, 0, "target", wasi::OFLAGS_DIRECTORY, 0, 0, 0)
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.expect("opening renamed path as a directory");
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assert_gt!(
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fd,
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libc::STDERR_FILENO as wasi::Fd,
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"file descriptor range check",
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);
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wasi::fd_close(fd).expect("closing a file");
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wasi::path_remove_directory(dir_fd, "target").expect("removing a directory");
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} else {
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wasi::path_create_directory(dir_fd, "source").expect("creating a directory");
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wasi::path_create_directory(dir_fd, "target").expect("creating a directory");
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wasi::path_rename(dir_fd, "source", dir_fd, "target")
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.expect_err("windows does not support renaming a directory to an empty directory");
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wasi::path_remove_directory(dir_fd, "target").expect("removing a directory");
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wasi::path_remove_directory(dir_fd, "source").expect("removing a directory");
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}
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// Now, try renaming a dir to existing non-empty dir
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wasi::path_create_directory(dir_fd, "source").expect("creating a directory");
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wasi::path_create_directory(dir_fd, "target").expect("creating a directory");
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create_file(dir_fd, "target/file");
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assert_errno!(
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wasi::path_rename(dir_fd, "source", dir_fd, "target")
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.expect_err("renaming directory to a nonempty directory")
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.raw_error(),
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windows => wasi::ERRNO_ACCES,
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unix => wasi::ERRNO_NOTEMPTY
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);
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// This is technically a different property, but the root of these divergent behaviors is in
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// the semantics that windows gives us around renaming directories. So, it lives under the same
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// flag.
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if TESTCONFIG.support_rename_dir_to_empty_dir() {
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// Try renaming dir to a file
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assert_errno!(
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wasi::path_rename(dir_fd, "source", dir_fd, "target/file")
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.expect_err("renaming a directory to a file")
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.raw_error(),
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wasi::ERRNO_NOTDIR
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);
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wasi::path_unlink_file(dir_fd, "target/file").expect("removing a file");
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wasi::path_remove_directory(dir_fd, "source").expect("removing a directory");
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} else {
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// Windows will let you erase a file by renaming a directory to it.
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// WASI users can't depend on this error getting caught to prevent data loss.
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wasi::path_rename(dir_fd, "source", dir_fd, "target/file")
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.expect("windows happens to support renaming a directory to a file");
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wasi::path_remove_directory(dir_fd, "target/file").expect("removing a file");
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}
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wasi::path_remove_directory(dir_fd, "target").expect("removing a directory");
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// Now, try renaming a file to a nonexistent path
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create_file(dir_fd, "source");
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wasi::path_rename(dir_fd, "source", dir_fd, "target").expect("renaming a file");
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// Check that source file doesn't exist anymore
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assert_errno!(
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wasi::path_open(dir_fd, 0, "source", 0, 0, 0, 0)
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.expect_err("opening a nonexistent path should fail")
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.raw_error(),
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wasi::ERRNO_NOENT
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);
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// Check that target file exists
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fd = wasi::path_open(dir_fd, 0, "target", 0, 0, 0, 0).expect("opening renamed path");
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assert_gt!(
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fd,
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libc::STDERR_FILENO as wasi::Fd,
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"file descriptor range check",
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);
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wasi::fd_close(fd).expect("closing a file");
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wasi::path_unlink_file(dir_fd, "target").expect("removing a file");
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// Now, try renaming file to an existing file
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create_file(dir_fd, "source");
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create_file(dir_fd, "target");
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wasi::path_rename(dir_fd, "source", dir_fd, "target")
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.expect("renaming file to another existing file");
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// Check that source file doesn't exist anymore
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assert_errno!(
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wasi::path_open(dir_fd, 0, "source", 0, 0, 0, 0)
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.expect_err("opening a nonexistent path")
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.raw_error(),
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wasi::ERRNO_NOENT
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);
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// Check that target file exists
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fd = wasi::path_open(dir_fd, 0, "target", 0, 0, 0, 0).expect("opening renamed path");
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assert_gt!(
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fd,
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libc::STDERR_FILENO as wasi::Fd,
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"file descriptor range check",
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);
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wasi::fd_close(fd).expect("closing a file");
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wasi::path_unlink_file(dir_fd, "target").expect("removing a file");
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// Try renaming to an (empty) directory instead
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create_file(dir_fd, "source");
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wasi::path_create_directory(dir_fd, "target").expect("creating a directory");
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assert_errno!(
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wasi::path_rename(dir_fd, "source", dir_fd, "target")
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.expect_err("renaming a file to existing directory should fail")
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.raw_error(),
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windows => wasi::ERRNO_ACCES,
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unix => wasi::ERRNO_ISDIR
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);
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wasi::path_remove_directory(dir_fd, "target").expect("removing a directory");
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wasi::path_unlink_file(dir_fd, "source").expect("removing a file");
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}
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fn main() {
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let mut args = env::args();
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let prog = args.next().unwrap();
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let arg = if let Some(arg) = args.next() {
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arg
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} else {
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eprintln!("usage: {} <scratch directory>", prog);
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process::exit(1);
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};
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// Open scratch directory
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let dir_fd = match open_scratch_directory(&arg) {
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Ok(dir_fd) => dir_fd,
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Err(err) => {
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eprintln!("{}", err);
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process::exit(1)
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}
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};
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// Run the tests.
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unsafe { test_path_rename(dir_fd) }
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}
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