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
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
|
use std::os::unix::prelude::*;
use tempfile::tempfile;
use nix::{Error, fcntl};
use nix::errno::Errno;
use nix::pty::openpty;
use nix::sys::termios::{self, ECHO, OPOST, OCRNL, Termios, tcgetattr};
use nix::unistd::{read, write, close};
/// Helper function analogous to std::io::Write::write_all, but for `RawFd`s
fn write_all(f: RawFd, buf: &[u8]) {
let mut len = 0;
while len < buf.len() {
len += write(f, &buf[len..]).unwrap();
}
}
// Test tcgetattr on a terminal
#[test]
fn test_tcgetattr_pty() {
let pty = openpty(None, None).unwrap();
assert!(termios::tcgetattr(pty.master).is_ok());
close(pty.master).unwrap();
close(pty.slave).unwrap();
}
// Test tcgetattr on something that isn't a terminal
#[test]
fn test_tcgetattr_enotty() {
let file = tempfile().unwrap();
assert_eq!(termios::tcgetattr(file.as_raw_fd()).err(),
Some(Error::Sys(Errno::ENOTTY)));
}
// Test tcgetattr on an invalid file descriptor
#[test]
fn test_tcgetattr_ebadf() {
assert_eq!(termios::tcgetattr(-1).err(),
Some(Error::Sys(Errno::EBADF)));
}
// Test modifying output flags
#[test]
fn test_output_flags() {
// Open one pty to get attributes for the second one
let mut termios = {
let pty = openpty(None, None).unwrap();
assert!(pty.master > 0);
assert!(pty.slave > 0);
let termios = tcgetattr(pty.master).unwrap();
close(pty.master).unwrap();
close(pty.slave).unwrap();
termios
};
// Make sure postprocessing '\r' isn't specified by default or this test is useless.
assert!(!termios.output_flags.contains(OPOST | OCRNL));
// Specify that '\r' characters should be transformed to '\n'
// OPOST is specified to enable post-processing
termios.output_flags.insert(OPOST | OCRNL);
// Open a pty
let pty = openpty(None, &termios).unwrap();
assert!(pty.master > 0);
assert!(pty.slave > 0);
// Write into the master
let string = "foofoofoo\r";
write_all(pty.master, string.as_bytes());
// Read from the slave verifying that the output has been properly transformed
let mut buf = [0u8; 10];
::read_exact(pty.slave, &mut buf);
let transformed_string = "foofoofoo\n";
close(pty.master).unwrap();
close(pty.slave).unwrap();
assert_eq!(&buf, transformed_string.as_bytes());
}
// Test modifying local flags
#[test]
fn test_local_flags() {
// Open one pty to get attributes for the second one
let mut termios = {
let pty = openpty(None, None).unwrap();
assert!(pty.master > 0);
assert!(pty.slave > 0);
let termios = tcgetattr(pty.master).unwrap();
close(pty.master).unwrap();
close(pty.slave).unwrap();
termios
};
// Make sure echo is specified by default or this test is useless.
assert!(termios.local_flags.contains(ECHO));
// Disable local echo
termios.local_flags.remove(ECHO);
// Open a new pty with our modified termios settings
let pty = openpty(None, &termios).unwrap();
assert!(pty.master > 0);
assert!(pty.slave > 0);
// Set the master is in nonblocking mode or reading will never return.
let flags = fcntl::fcntl(pty.master, fcntl::F_GETFL).unwrap();
let new_flags = fcntl::OFlag::from_bits(flags).unwrap() | fcntl::O_NONBLOCK;
fcntl::fcntl(pty.master, fcntl::F_SETFL(new_flags)).unwrap();
// Write into the master
let string = "foofoofoo\r";
write_all(pty.master, string.as_bytes());
// Try to read from the master, which should not have anything as echoing was disabled.
let mut buf = [0u8; 10];
let read = read(pty.master, &mut buf).unwrap_err();
close(pty.master).unwrap();
close(pty.slave).unwrap();
assert_eq!(read, Error::Sys(Errno::EAGAIN));
}
#[test]
fn test_cfmakeraw() {
let mut termios = unsafe { Termios::default_uninit() };
termios::cfmakeraw(&mut termios);
}
|
