1 // ignore-windows: File handling is not implemented yet
2 // compile-flags: -Zmiri-disable-isolation
4 use std::fs::{File, remove_file, rename};
5 use std::io::{Read, Write, ErrorKind, Result, Seek, SeekFrom};
6 use std::path::{PathBuf, Path};
18 /// Prepare: compute filename and make sure the file does not exist.
19 fn prepare(filename: &str) -> PathBuf {
20 let tmp = std::env::temp_dir();
21 let path = tmp.join(filename);
22 // Clean the paths for robustness.
23 remove_file(&path).ok();
27 /// Prepare like above, and also write some initial content to the file.
28 fn prepare_with_content(filename: &str, content: &[u8]) -> PathBuf {
29 let path = prepare(filename);
30 let mut file = File::create(&path).unwrap();
31 file.write(content).unwrap();
36 let bytes = b"Hello, World!\n";
37 let path = prepare("miri_test_fs_file.txt");
39 // Test creating, writing and closing a file (closing is tested when `file` is dropped).
40 let mut file = File::create(&path).unwrap();
41 // Writing 0 bytes should not change the file contents.
42 file.write(&mut []).unwrap();
43 assert_eq!(file.metadata().unwrap().len(), 0);
45 file.write(bytes).unwrap();
46 assert_eq!(file.metadata().unwrap().len(), bytes.len() as u64);
47 // Test opening, reading and closing a file.
48 let mut file = File::open(&path).unwrap();
49 let mut contents = Vec::new();
50 // Reading 0 bytes should not move the file pointer.
51 file.read(&mut []).unwrap();
52 // Reading until EOF should get the whole text.
53 file.read_to_end(&mut contents).unwrap();
54 assert_eq!(bytes, contents.as_slice());
56 // Removing file should succeed.
57 remove_file(&path).unwrap();
60 fn test_file_clone() {
61 let bytes = b"Hello, World!\n";
62 let path = prepare_with_content("miri_test_fs_file_clone.txt", bytes);
64 // Cloning a file should be successful.
65 let file = File::open(&path).unwrap();
66 let mut cloned = file.try_clone().unwrap();
67 // Reading from a cloned file should get the same text.
68 let mut contents = Vec::new();
69 cloned.read_to_end(&mut contents).unwrap();
70 assert_eq!(bytes, contents.as_slice());
72 // Removing file should succeed.
73 remove_file(&path).unwrap();
77 let bytes = b"Hello, entire World!\n";
78 let path = prepare_with_content("miri_test_fs_seek.txt", bytes);
80 let mut file = File::open(&path).unwrap();
81 let mut contents = Vec::new();
82 file.read_to_end(&mut contents).unwrap();
83 assert_eq!(bytes, contents.as_slice());
84 // Test that seeking to the beginning and reading until EOF gets the text again.
85 file.seek(SeekFrom::Start(0)).unwrap();
86 let mut contents = Vec::new();
87 file.read_to_end(&mut contents).unwrap();
88 assert_eq!(bytes, contents.as_slice());
89 // Test seeking relative to the end of the file.
90 file.seek(SeekFrom::End(-1)).unwrap();
91 let mut contents = Vec::new();
92 file.read_to_end(&mut contents).unwrap();
93 assert_eq!(&bytes[bytes.len() - 1..], contents.as_slice());
94 // Test seeking relative to the current position.
95 file.seek(SeekFrom::Start(5)).unwrap();
96 file.seek(SeekFrom::Current(-3)).unwrap();
97 let mut contents = Vec::new();
98 file.read_to_end(&mut contents).unwrap();
99 assert_eq!(&bytes[2..], contents.as_slice());
101 // Removing file should succeed.
102 remove_file(&path).unwrap();
105 fn check_metadata(bytes: &[u8], path: &Path) -> Result<()> {
106 // Test that the file metadata is correct.
107 let metadata = path.metadata()?;
108 // `path` should point to a file.
109 assert!(metadata.is_file());
110 // The size of the file must be equal to the number of written bytes.
111 assert_eq!(bytes.len() as u64, metadata.len());
116 let bytes = b"Hello, meta-World!\n";
117 let path = prepare_with_content("miri_test_fs_metadata.txt", bytes);
119 // Test that metadata of an absolute path is correct.
120 check_metadata(bytes, &path).unwrap();
121 // Test that metadata of a relative path is correct.
122 std::env::set_current_dir(path.parent().unwrap()).unwrap();
123 check_metadata(bytes, Path::new(path.file_name().unwrap())).unwrap();
125 // Removing file should succeed.
126 remove_file(&path).unwrap();
130 let bytes = b"Hello, World!\n";
131 let path = prepare_with_content("miri_test_fs_link_target.txt", bytes);
132 let symlink_path = prepare("miri_test_fs_symlink.txt");
134 // Creating a symbolic link should succeed.
135 std::os::unix::fs::symlink(&path, &symlink_path).unwrap();
136 // Test that the symbolic link has the same contents as the file.
137 let mut symlink_file = File::open(&symlink_path).unwrap();
138 let mut contents = Vec::new();
139 symlink_file.read_to_end(&mut contents).unwrap();
140 assert_eq!(bytes, contents.as_slice());
141 // Test that metadata of a symbolic link is correct.
142 check_metadata(bytes, &symlink_path).unwrap();
143 // Test that the metadata of a symbolic link is correct when not following it.
144 assert!(symlink_path.symlink_metadata().unwrap().file_type().is_symlink());
145 // Removing symbolic link should succeed.
146 remove_file(&symlink_path).unwrap();
148 // Removing file should succeed.
149 remove_file(&path).unwrap();
153 let bytes = b"Hello, World!\n";
154 let path = prepare("miri_test_fs_errors.txt");
156 // The following tests also check that the `__errno_location()` shim is working properly.
157 // Opening a non-existing file should fail with a "not found" error.
158 assert_eq!(ErrorKind::NotFound, File::open(&path).unwrap_err().kind());
159 // Removing a non-existing file should fail with a "not found" error.
160 assert_eq!(ErrorKind::NotFound, remove_file(&path).unwrap_err().kind());
161 // Reading the metadata of a non-existing file should fail with a "not found" error.
162 assert_eq!(ErrorKind::NotFound, check_metadata(bytes, &path).unwrap_err().kind());
166 // Renaming a file should succeed.
167 let path1 = prepare("miri_test_fs_rename_source.txt");
168 let path2 = prepare("miri_test_fs_rename_destination.txt");
170 let file = File::create(&path1).unwrap();
173 // Renaming should succeed
174 rename(&path1, &path2).unwrap();
175 // Check that the old file path isn't present
176 assert_eq!(ErrorKind::NotFound, path1.metadata().unwrap_err().kind());
177 // Check that the file has moved successfully
178 assert!(path2.metadata().unwrap().is_file());
180 // Renaming a nonexistent file should fail
181 assert_eq!(ErrorKind::NotFound, rename(&path1, &path2).unwrap_err().kind());
183 remove_file(&path2).unwrap();