232 lines
8.8 KiB
Rust
232 lines
8.8 KiB
Rust
use more_asserts::assert_gt;
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use std::{env, process};
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use wasi_tests::{create_file, open_scratch_directory};
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const TEST_RIGHTS: wasi::Rights = wasi::RIGHTS_FD_READ
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| wasi::RIGHTS_PATH_LINK_SOURCE
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| wasi::RIGHTS_PATH_LINK_TARGET
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| wasi::RIGHTS_FD_FILESTAT_GET
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| wasi::RIGHTS_PATH_OPEN
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| wasi::RIGHTS_PATH_UNLINK_FILE;
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unsafe fn create_or_open(dir_fd: wasi::Fd, name: &str, flags: wasi::Oflags) -> wasi::Fd {
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let file_fd = wasi::path_open(dir_fd, 0, name, flags, TEST_RIGHTS, TEST_RIGHTS, 0)
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.unwrap_or_else(|_| panic!("opening '{}'", name));
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assert_gt!(
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file_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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file_fd
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}
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unsafe fn open_link(dir_fd: wasi::Fd, name: &str) -> wasi::Fd {
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let file_fd = wasi::path_open(dir_fd, 0, name, 0, TEST_RIGHTS, TEST_RIGHTS, 0)
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.unwrap_or_else(|_| panic!("opening a link '{}'", name));
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assert_gt!(
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file_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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file_fd
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}
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// This is temporary until `wasi` implements `Debug` and `PartialEq` for
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// `wasi::Filestat`.
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fn filestats_assert_eq(left: wasi::Filestat, right: wasi::Filestat) {
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assert_eq!(left.dev, right.dev, "dev should be equal");
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assert_eq!(left.ino, right.ino, "ino should be equal");
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assert_eq!(left.atim, right.atim, "atim should be equal");
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assert_eq!(left.ctim, right.ctim, "ctim should be equal");
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assert_eq!(left.mtim, right.mtim, "mtim should be equal");
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assert_eq!(left.size, right.size, "size should be equal");
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assert_eq!(left.nlink, right.nlink, "nlink should be equal");
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assert_eq!(left.filetype, right.filetype, "filetype should be equal");
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}
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// This is temporary until `wasi` implements `Debug` and `PartialEq` for
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// `wasi::Fdstat`.
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fn fdstats_assert_eq(left: wasi::Fdstat, right: wasi::Fdstat) {
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assert_eq!(left.fs_flags, right.fs_flags, "fs_flags should be equal");
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assert_eq!(
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left.fs_filetype, right.fs_filetype,
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"fs_filetype should be equal"
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);
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assert_eq!(
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left.fs_rights_base, right.fs_rights_base,
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"fs_rights_base should be equal"
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);
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assert_eq!(
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left.fs_rights_inheriting, right.fs_rights_inheriting,
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"fs_rights_inheriting should be equal"
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);
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}
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unsafe fn check_rights(orig_fd: wasi::Fd, link_fd: wasi::Fd) {
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// Compare Filestats
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let orig_filestat = wasi::fd_filestat_get(orig_fd).expect("reading filestat of the source");
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let link_filestat = wasi::fd_filestat_get(link_fd).expect("reading filestat of the link");
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filestats_assert_eq(orig_filestat, link_filestat);
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// Compare Fdstats
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let orig_fdstat = wasi::fd_fdstat_get(orig_fd).expect("reading fdstat of the source");
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let link_fdstat = wasi::fd_fdstat_get(link_fd).expect("reading fdstat of the link");
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fdstats_assert_eq(orig_fdstat, link_fdstat);
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}
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// Extra calls of fd_close are needed for Windows, which will not remove
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// the directory until all handles are closed.
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unsafe fn test_path_link(dir_fd: wasi::Fd) {
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// Create a file
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let file_fd = create_or_open(dir_fd, "file", wasi::OFLAGS_CREAT);
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// Create a link in the same directory and compare rights
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wasi::path_link(dir_fd, 0, "file", dir_fd, "link")
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.expect("creating a link in the same directory");
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let link_fd = open_link(dir_fd, "link");
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check_rights(file_fd, link_fd);
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wasi::fd_close(link_fd).expect("Closing link_fd"); // needed for Windows
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wasi::path_unlink_file(dir_fd, "link").expect("removing a link");
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// Create a link in a different directory and compare rights
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wasi::path_create_directory(dir_fd, "subdir").expect("creating a subdirectory");
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let subdir_fd = create_or_open(dir_fd, "subdir", wasi::OFLAGS_DIRECTORY);
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wasi::path_link(dir_fd, 0, "file", subdir_fd, "link").expect("creating a link in subdirectory");
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let link_fd = open_link(subdir_fd, "link");
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check_rights(file_fd, link_fd);
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wasi::path_unlink_file(subdir_fd, "link").expect("removing a link");
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wasi::fd_close(subdir_fd).expect("Closing subdir_fd"); // needed for Windows
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wasi::fd_close(link_fd).expect("Closing link_fd"); // needed for Windows
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wasi::path_remove_directory(dir_fd, "subdir").expect("removing a subdirectory");
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// Create a link to a path that already exists
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create_file(dir_fd, "link");
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assert_eq!(
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wasi::path_link(dir_fd, 0, "file", dir_fd, "link")
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.expect_err("creating a link to existing path should fail")
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.raw_error(),
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wasi::ERRNO_EXIST,
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"errno should be ERRNO_EXIST"
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);
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wasi::path_unlink_file(dir_fd, "link").expect("removing a file");
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// Create a link to itself
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assert_eq!(
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wasi::path_link(dir_fd, 0, "file", dir_fd, "file")
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.expect_err("creating a link to itself should fail")
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.raw_error(),
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wasi::ERRNO_EXIST,
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"errno should be ERRNO_EXIST"
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);
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// Create a link where target is a directory
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wasi::path_create_directory(dir_fd, "link").expect("creating a dir");
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assert_eq!(
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wasi::path_link(dir_fd, 0, "file", dir_fd, "link")
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.expect_err("creating a link where target is a directory should fail")
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.raw_error(),
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wasi::ERRNO_EXIST,
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"errno should be ERRNO_EXIST"
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);
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wasi::path_remove_directory(dir_fd, "link").expect("removing a dir");
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// Create a link to a directory
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wasi::path_create_directory(dir_fd, "subdir").expect("creating a subdirectory");
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let subdir_fd = create_or_open(dir_fd, "subdir", wasi::OFLAGS_DIRECTORY);
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let path_link_errno = wasi::path_link(dir_fd, 0, "subdir", dir_fd, "link")
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.expect_err("creating a link to a directory should fail")
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.raw_error();
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assert!(
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path_link_errno == wasi::ERRNO_PERM || path_link_errno == wasi::ERRNO_ACCES,
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"errno should be ERRNO_PERM or ERRNO_ACCES"
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);
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wasi::fd_close(subdir_fd).expect("close subdir before deleting it");
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wasi::path_remove_directory(dir_fd, "subdir").expect("removing a subdirectory");
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// Create a link to a file with trailing slash
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assert_eq!(
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wasi::path_link(dir_fd, 0, "file", dir_fd, "link/")
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.expect_err("creating a link to a file with trailing slash should fail")
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.raw_error(),
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wasi::ERRNO_NOENT,
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"errno should be ERRNO_NOENT"
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);
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// XXX windows doesnt support dangling symlinks - rest of file
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// Create a link to a dangling symlink
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wasi::path_symlink("target", dir_fd, "symlink").expect("creating a dangling symlink");
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// This should succeed, because we're not following symlinks
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wasi::path_link(dir_fd, 0, "symlink", dir_fd, "link")
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.expect("creating a link to a dangling symlink should succeed");
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wasi::path_unlink_file(dir_fd, "symlink").expect("removing a symlink");
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wasi::path_unlink_file(dir_fd, "link").expect("removing a hardlink");
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// Create a link to a symlink loop
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wasi::path_symlink("symlink", dir_fd, "symlink").expect("creating a symlink loop");
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wasi::path_link(dir_fd, 0, "symlink", dir_fd, "link")
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.expect("creating a link to a symlink loop should succeed");
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wasi::path_unlink_file(dir_fd, "symlink").expect("removing a symlink");
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wasi::path_unlink_file(dir_fd, "link").expect("removing a hardlink");
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// Create a link where target is a dangling symlink
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wasi::path_symlink("target", dir_fd, "symlink").expect("creating a dangling symlink");
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assert_eq!(
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wasi::path_link(dir_fd, 0, "file", dir_fd, "symlink")
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.expect_err("creating a link where target is a dangling symlink")
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.raw_error(),
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wasi::ERRNO_EXIST,
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"errno should be ERRNO_EXIST"
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);
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wasi::path_unlink_file(dir_fd, "symlink").expect("removing a symlink");
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// Create a link where target is a dangling symlink following symlinks
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wasi::path_symlink("target", dir_fd, "symlink").expect("creating a dangling symlink");
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// Symlink following with path_link is rejected
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assert_eq!(
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wasi::path_link(
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dir_fd,
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wasi::LOOKUPFLAGS_SYMLINK_FOLLOW,
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"symlink",
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dir_fd,
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"link",
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)
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.expect_err("calling path_link with LOOKUPFLAGS_SYMLINK_FOLLOW should fail")
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.raw_error(),
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wasi::ERRNO_INVAL,
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"errno should be ERRNO_INVAL"
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);
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// Clean up.
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wasi::path_unlink_file(dir_fd, "file").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_link(dir_fd) }
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}
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