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
127
128
129
130
131
132
133
134
135
136
|
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, LocalFlags, OutputFlags, 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() {
// openpty uses ptname(3) internally
let _m = crate::PTSNAME_MTX.lock().expect("Mutex got poisoned by another test");
let pty = openpty(None, None).expect("openpty failed");
assert!(termios::tcgetattr(pty.master).is_ok());
close(pty.master).expect("closing the master failed");
close(pty.slave).expect("closing the slave failed");
}
// 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() {
// openpty uses ptname(3) internally
let _m = crate::PTSNAME_MTX.lock().expect("Mutex got poisoned by another test");
// Open one pty to get attributes for the second one
let mut termios = {
let pty = openpty(None, None).expect("openpty failed");
assert!(pty.master > 0);
assert!(pty.slave > 0);
let termios = tcgetattr(pty.master).expect("tcgetattr failed");
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(OutputFlags::OPOST | OutputFlags::OCRNL));
// Specify that '\r' characters should be transformed to '\n'
// OPOST is specified to enable post-processing
termios.output_flags.insert(OutputFlags::OPOST | OutputFlags::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];
crate::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() {
// openpty uses ptname(3) internally
let _m = crate::PTSNAME_MTX.lock().expect("Mutex got poisoned by another test");
// 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(LocalFlags::ECHO));
// Disable local echo
termios.local_flags.remove(LocalFlags::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_truncate(flags) | fcntl::OFlag::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);
}
|