blob: 1840bb38c17c8b2a331811714ad5ff96294eb65f (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
|
use super::*;
#[test]
fn read_vectored_at() {
let msg = b"preadv is working!";
let dir = crate::test_helpers::tmpdir();
let filename = dir.join("preadv.txt");
{
let mut file = fs::File::create(&filename).unwrap();
file.write_all(msg).unwrap();
}
{
let file = fs::File::open(&filename).unwrap();
let mut buf0 = [0; 4];
let mut buf1 = [0; 3];
let mut iovec = [io::IoSliceMut::new(&mut buf0), io::IoSliceMut::new(&mut buf1)];
let n = file.read_vectored_at(&mut iovec, 4).unwrap();
assert!(n == 4 || n == 7);
assert_eq!(&buf0, b"dv i");
if n == 7 {
assert_eq!(&buf1, b"s w");
}
}
}
#[test]
fn write_vectored_at() {
let msg = b"pwritev is not working!";
let dir = crate::test_helpers::tmpdir();
let filename = dir.join("preadv.txt");
{
let mut file = fs::File::create(&filename).unwrap();
file.write_all(msg).unwrap();
}
let expected = {
let file = fs::File::options().write(true).open(&filename).unwrap();
let buf0 = b" ";
let buf1 = b"great ";
let iovec = [io::IoSlice::new(buf0), io::IoSlice::new(buf1)];
let n = file.write_vectored_at(&iovec, 11).unwrap();
assert!(n == 4 || n == 11);
if n == 4 { b"pwritev is working!" } else { b"pwritev is great !" }
};
let content = fs::read(&filename).unwrap();
assert_eq!(&content, expected);
}
#[test]
fn test_mkfifo() {
let tmp_dir = crate::test_helpers::tmpdir();
let fifo = tmp_dir.path().join("fifo");
mkfifo(&fifo, Permissions::from_mode(0o774)).unwrap();
let mut wx = fs::File::options().read(true).write(true).open(&fifo).unwrap();
let mut rx = fs::File::open(fifo).unwrap();
wx.write_all(b"hello, world!").unwrap();
drop(wx);
let mut s = String::new();
rx.read_to_string(&mut s).unwrap();
assert_eq!(s, "hello, world!");
}
|
