1 // ignore-windows: File handling is not implemented yet
2 // compile-flags: -Zmiri-disable-isolation
4 use std::fs::{File, create_dir, read_dir, remove_dir, remove_dir_all, remove_file, rename};
5 use std::io::{Read, Write, ErrorKind, Result, Seek, SeekFrom};
6 use std::path::{PathBuf, Path};
20 std::env::var("MIRI_TEMP").map(PathBuf::from).unwrap_or_else(|_| std::env::temp_dir())
23 /// Prepare: compute filename and make sure the file does not exist.
24 fn prepare(filename: &str) -> PathBuf {
25 let path = tmp().join(filename);
26 // Clean the paths for robustness.
27 remove_file(&path).ok();
31 /// Prepare directory: compute directory name and make sure it does not exist.
32 fn prepare_dir(dirname: &str) -> PathBuf {
33 let path = tmp().join(&dirname);
34 // Clean the directory for robustness.
35 remove_dir_all(&path).ok();
39 /// Prepare like above, and also write some initial content to the file.
40 fn prepare_with_content(filename: &str, content: &[u8]) -> PathBuf {
41 let path = prepare(filename);
42 let mut file = File::create(&path).unwrap();
43 file.write(content).unwrap();
48 let bytes = b"Hello, World!\n";
49 let path = prepare("miri_test_fs_file.txt");
51 // Test creating, writing and closing a file (closing is tested when `file` is dropped).
52 let mut file = File::create(&path).unwrap();
53 // Writing 0 bytes should not change the file contents.
54 file.write(&mut []).unwrap();
55 assert_eq!(file.metadata().unwrap().len(), 0);
57 file.write(bytes).unwrap();
58 assert_eq!(file.metadata().unwrap().len(), bytes.len() as u64);
59 // Test opening, reading and closing a file.
60 let mut file = File::open(&path).unwrap();
61 let mut contents = Vec::new();
62 // Reading 0 bytes should not move the file pointer.
63 file.read(&mut []).unwrap();
64 // Reading until EOF should get the whole text.
65 file.read_to_end(&mut contents).unwrap();
66 assert_eq!(bytes, contents.as_slice());
68 // Removing file should succeed.
69 remove_file(&path).unwrap();
72 fn test_file_clone() {
73 let bytes = b"Hello, World!\n";
74 let path = prepare_with_content("miri_test_fs_file_clone.txt", bytes);
76 // Cloning a file should be successful.
77 let file = File::open(&path).unwrap();
78 let mut cloned = file.try_clone().unwrap();
79 // Reading from a cloned file should get the same text.
80 let mut contents = Vec::new();
81 cloned.read_to_end(&mut contents).unwrap();
82 assert_eq!(bytes, contents.as_slice());
84 // Removing file should succeed.
85 remove_file(&path).unwrap();
89 let bytes = b"Hello, entire World!\n";
90 let path = prepare_with_content("miri_test_fs_seek.txt", bytes);
92 let mut file = File::open(&path).unwrap();
93 let mut contents = Vec::new();
94 file.read_to_end(&mut contents).unwrap();
95 assert_eq!(bytes, contents.as_slice());
96 // Test that seeking to the beginning and reading until EOF gets the text again.
97 file.seek(SeekFrom::Start(0)).unwrap();
98 let mut contents = Vec::new();
99 file.read_to_end(&mut contents).unwrap();
100 assert_eq!(bytes, contents.as_slice());
101 // Test seeking relative to the end of the file.
102 file.seek(SeekFrom::End(-1)).unwrap();
103 let mut contents = Vec::new();
104 file.read_to_end(&mut contents).unwrap();
105 assert_eq!(&bytes[bytes.len() - 1..], contents.as_slice());
106 // Test seeking relative to the current position.
107 file.seek(SeekFrom::Start(5)).unwrap();
108 file.seek(SeekFrom::Current(-3)).unwrap();
109 let mut contents = Vec::new();
110 file.read_to_end(&mut contents).unwrap();
111 assert_eq!(&bytes[2..], contents.as_slice());
113 // Removing file should succeed.
114 remove_file(&path).unwrap();
117 fn check_metadata(bytes: &[u8], path: &Path) -> Result<()> {
118 // Test that the file metadata is correct.
119 let metadata = path.metadata()?;
120 // `path` should point to a file.
121 assert!(metadata.is_file());
122 // The size of the file must be equal to the number of written bytes.
123 assert_eq!(bytes.len() as u64, metadata.len());
128 let bytes = b"Hello, meta-World!\n";
129 let path = prepare_with_content("miri_test_fs_metadata.txt", bytes);
131 // Test that metadata of an absolute path is correct.
132 check_metadata(bytes, &path).unwrap();
133 // Test that metadata of a relative path is correct.
134 std::env::set_current_dir(path.parent().unwrap()).unwrap();
135 check_metadata(bytes, Path::new(path.file_name().unwrap())).unwrap();
137 // Removing file should succeed.
138 remove_file(&path).unwrap();
142 let bytes = b"Hello, World!\n";
143 let path = prepare_with_content("miri_test_fs_link_target.txt", bytes);
144 let symlink_path = prepare("miri_test_fs_symlink.txt");
146 // Creating a symbolic link should succeed.
148 std::os::unix::fs::symlink(&path, &symlink_path).unwrap();
150 std::os::windows::fs::symlink_file(&path, &symlink_path).unwrap();
151 // Test that the symbolic link has the same contents as the file.
152 let mut symlink_file = File::open(&symlink_path).unwrap();
153 let mut contents = Vec::new();
154 symlink_file.read_to_end(&mut contents).unwrap();
155 assert_eq!(bytes, contents.as_slice());
156 // Test that metadata of a symbolic link is correct.
157 check_metadata(bytes, &symlink_path).unwrap();
158 // Test that the metadata of a symbolic link is correct when not following it.
159 assert!(symlink_path.symlink_metadata().unwrap().file_type().is_symlink());
160 // Removing symbolic link should succeed.
161 remove_file(&symlink_path).unwrap();
163 // Removing file should succeed.
164 remove_file(&path).unwrap();
168 let bytes = b"Hello, World!\n";
169 let path = prepare("miri_test_fs_errors.txt");
171 // The following tests also check that the `__errno_location()` shim is working properly.
172 // Opening a non-existing file should fail with a "not found" error.
173 assert_eq!(ErrorKind::NotFound, File::open(&path).unwrap_err().kind());
174 // Removing a non-existing file should fail with a "not found" error.
175 assert_eq!(ErrorKind::NotFound, remove_file(&path).unwrap_err().kind());
176 // Reading the metadata of a non-existing file should fail with a "not found" error.
177 assert_eq!(ErrorKind::NotFound, check_metadata(bytes, &path).unwrap_err().kind());
181 // Renaming a file should succeed.
182 let path1 = prepare("miri_test_fs_rename_source.txt");
183 let path2 = prepare("miri_test_fs_rename_destination.txt");
185 let file = File::create(&path1).unwrap();
188 // Renaming should succeed
189 rename(&path1, &path2).unwrap();
190 // Check that the old file path isn't present
191 assert_eq!(ErrorKind::NotFound, path1.metadata().unwrap_err().kind());
192 // Check that the file has moved successfully
193 assert!(path2.metadata().unwrap().is_file());
195 // Renaming a nonexistent file should fail
196 assert_eq!(ErrorKind::NotFound, rename(&path1, &path2).unwrap_err().kind());
198 remove_file(&path2).unwrap();
201 fn test_directory() {
202 let dir_path = prepare_dir("miri_test_fs_dir");
203 // Creating a directory should succeed.
204 create_dir(&dir_path).unwrap();
205 // Test that the metadata of a directory is correct.
206 assert!(dir_path.metadata().unwrap().is_dir());
207 // Creating a directory when it already exists should fail.
208 assert_eq!(ErrorKind::AlreadyExists, create_dir(&dir_path).unwrap_err().kind());
210 // Create some files inside the directory
211 let path_1 = dir_path.join("test_file_1");
212 drop(File::create(&path_1).unwrap());
213 let path_2 = dir_path.join("test_file_2");
214 drop(File::create(&path_2).unwrap());
215 // Test that the files are present inside the directory
216 let dir_iter = read_dir(&dir_path).unwrap();
217 let mut file_names = dir_iter.map(|e| e.unwrap().file_name()).collect::<Vec<_>>();
218 file_names.sort_unstable();
219 assert_eq!(file_names, vec!["test_file_1", "test_file_2"]);
220 // Clean up the files in the directory
221 remove_file(&path_1).unwrap();
222 remove_file(&path_2).unwrap();
223 // Now there should be nothing left in the directory.
224 let dir_iter = read_dir(&dir_path).unwrap();
225 let file_names = dir_iter.map(|e| e.unwrap().file_name()).collect::<Vec<_>>();
226 assert!(file_names.is_empty());
228 // Deleting the directory should succeed.
229 remove_dir(&dir_path).unwrap();
230 // Reading the metadata of a non-existent directory should fail with a "not found" error.
231 assert_eq!(ErrorKind::NotFound, check_metadata(&[], &dir_path).unwrap_err().kind());