process-wrap 9.1.0

Wrap a Command, to spawn processes in a group or session or job etc
Documentation 
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
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177

#![cfg(target_os = "linux")]

use super::prelude::*;

#[tokio::test]
async fn process_group_kill_leader() -> Result<()> {
	let mut leader = CommandWrap::with_new("tests/multiproc_helper.rs", |command| {
		command
			.arg("1")
			.arg("10")
			.stdout(Stdio::piped())
			.stderr(Stdio::null());
	})
	.wrap(KillOnDrop)
	.wrap(ProcessGroup::leader())
	.spawn()?;
	assert!(leader.try_wait()?.is_none(), "leader: pre kill");

	sleep(DIE_TIME).await;

	let stdout = leader
		.stdout()
		.take()
		.expect("Option.unwrap(): get leader stdout");
	let mut lines = BufReader::new(stdout).lines();
	let Some(line) = lines.next_line().await? else {
		panic!("expected line with child pid");
	};
	let Some((parent, child)) = line.split_once(':') else {
		panic!("expected line with parent and child pids");
	};

	let parent = parent.parse::<i32>().unwrap();
	let child = child.parse::<i32>().unwrap();

	assert_eq!(parent, leader.id().unwrap() as _);
	assert!(pid_alive(parent), "parent process should be alive");
	assert!(pid_alive(child), "child process should be alive");

	Box::into_pin(leader.kill()).await.unwrap();
	sleep(DIE_TIME).await;
	assert!(!pid_alive(parent), "parent process should be dead");
	assert!(!pid_alive(child), "child process should be dead");

	Ok(())
}

#[tokio::test]
async fn process_group_kill_group() -> Result<()> {
	let mut leader = CommandWrap::with_new("tests/multiproc_helper.rs", |command| {
		command
			.arg("1")
			.arg("10")
			.stdout(Stdio::piped())
			.stderr(Stdio::null());
	})
	.wrap(KillOnDrop)
	.wrap(ProcessGroup::leader())
	.spawn()?;
	assert!(leader.try_wait()?.is_none(), "leader: pre kill");

	sleep(DIE_TIME).await;

	let stdout = leader
		.stdout()
		.take()
		.expect("Option.unwrap(): get leader stdout");
	let mut lines = BufReader::new(stdout).lines();
	let Some(line) = lines.next_line().await? else {
		panic!("expected line with child pid");
	};
	let Some((parent, child)) = line.split_once(':') else {
		panic!("expected line with parent and child pids");
	};

	let parent = parent.parse::<i32>().unwrap();
	let child = child.parse::<i32>().unwrap();

	assert_eq!(parent, leader.id().unwrap() as _);
	assert!(pid_alive(parent), "parent process should be alive");
	assert!(pid_alive(child), "child process should be alive");

	nix::sys::signal::killpg(nix::unistd::Pid::from_raw(parent), Signal::SIGKILL).unwrap();
	sleep(DIE_TIME).await;
	assert!(!pid_alive(child), "child process should be dead");
	leader.wait().await.unwrap();
	assert!(!pid_alive(parent), "parent process should be dead");

	Ok(())
}

#[tokio::test]
async fn process_session_kill_leader() -> Result<()> {
	let mut leader = CommandWrap::with_new("tests/multiproc_helper.rs", |command| {
		command
			.arg("1")
			.arg("10")
			.stdout(Stdio::piped())
			.stderr(Stdio::null());
	})
	.wrap(KillOnDrop)
	.wrap(ProcessSession)
	.spawn()?;
	assert!(leader.try_wait()?.is_none(), "leader: pre kill");

	sleep(DIE_TIME).await;

	let stdout = leader
		.stdout()
		.take()
		.expect("Option.unwrap(): get leader stdout");
	let mut lines = BufReader::new(stdout).lines();
	let Some(line) = lines.next_line().await? else {
		panic!("expected line with child pid");
	};
	let Some((parent, child)) = line.split_once(':') else {
		panic!("expected line with parent and child pids");
	};

	let parent = parent.parse::<i32>().unwrap();
	let child = child.parse::<i32>().unwrap();

	assert_eq!(parent, leader.id().unwrap() as _);
	assert!(pid_alive(parent), "parent process should be alive");
	assert!(pid_alive(child), "child process should be alive");

	Box::into_pin(leader.kill()).await.unwrap();
	sleep(DIE_TIME).await;
	assert!(!pid_alive(parent), "parent process should be dead");
	assert!(!pid_alive(child), "child process should be dead");

	Ok(())
}

#[tokio::test]
async fn process_session_kill_group() -> Result<()> {
	let mut leader = CommandWrap::with_new("tests/multiproc_helper.rs", |command| {
		command
			.arg("1")
			.arg("10")
			.stdout(Stdio::piped())
			.stderr(Stdio::null());
	})
	.wrap(KillOnDrop)
	.wrap(ProcessSession)
	.spawn()?;
	assert!(leader.try_wait()?.is_none(), "leader: pre kill");

	sleep(DIE_TIME).await;

	let stdout = leader
		.stdout()
		.take()
		.expect("Option.unwrap(): get leader stdout");
	let mut lines = BufReader::new(stdout).lines();
	let Some(line) = lines.next_line().await? else {
		panic!("expected line with child pid");
	};
	let Some((parent, child)) = line.split_once(':') else {
		panic!("expected line with parent and child pids");
	};

	let parent = parent.parse::<i32>().unwrap();
	let child = child.parse::<i32>().unwrap();

	assert_eq!(parent, leader.id().unwrap() as _);
	assert!(pid_alive(parent), "parent process should be alive");
	assert!(pid_alive(child), "child process should be alive");

	nix::sys::signal::killpg(nix::unistd::Pid::from_raw(parent), Signal::SIGKILL).unwrap();
	sleep(DIE_TIME).await;
	assert!(!pid_alive(child), "child process should be dead");
	leader.wait().await.unwrap();
	assert!(!pid_alive(parent), "parent process should be dead");

	Ok(())
}