File size: 5,060 Bytes
50fe3c9 | 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 | use std::io::Read;
use std::path::PathBuf;
use std::process::Stdio;
use std::sync::atomic::{AtomicBool, AtomicI32, Ordering};
use std::sync::{Arc, Mutex};
use std::thread;
use std::time::SystemTime;
use serde::Serialize;
use shared_child::SharedChild;
use super::ringbuffer::BoundedRingBuffer;
const RING_CAP: usize = 4 * 1024 * 1024;
pub struct BackgroundProc {
pub command: String,
pub cwd: Option<String>,
pub started_at_ms: u64,
pub child: Arc<SharedChild>,
pub buffer: Mutex<BoundedRingBuffer>,
pub exited: AtomicBool,
pub exit_code: AtomicI32,
pub exit_unknown: AtomicBool,
}
#[derive(Serialize)]
pub struct BackgroundLogResponse {
pub bytes: String,
pub next_offset: u64,
pub dropped: u64,
pub exited: bool,
pub exit_code: Option<i32>,
}
#[derive(Serialize)]
pub struct BackgroundProcInfo {
pub handle: u32,
pub command: String,
pub cwd: Option<String>,
pub started_at_ms: u64,
pub exited: bool,
pub exit_code: Option<i32>,
}
impl BackgroundProc {
pub fn read_logs(&self, since: u64) -> BackgroundLogResponse {
let (bytes, next_offset, dropped) = self.buffer.lock().unwrap().read_from(since);
let exited = self.exited.load(Ordering::Acquire);
let exit_code = if exited && !self.exit_unknown.load(Ordering::Acquire) {
Some(self.exit_code.load(Ordering::Acquire))
} else {
None
};
BackgroundLogResponse {
bytes: String::from_utf8_lossy(&bytes).into_owned(),
next_offset,
dropped,
exited,
exit_code,
}
}
pub fn kill(&self) {
let _ = self.child.kill();
}
pub fn info(&self, handle: u32) -> BackgroundProcInfo {
let exited = self.exited.load(Ordering::Acquire);
let exit_code = if exited && !self.exit_unknown.load(Ordering::Acquire) {
Some(self.exit_code.load(Ordering::Acquire))
} else {
None
};
BackgroundProcInfo {
handle,
command: self.command.clone(),
cwd: self.cwd.clone(),
started_at_ms: self.started_at_ms,
exited,
exit_code,
}
}
}
impl Drop for BackgroundProc {
fn drop(&mut self) {
self.kill();
}
}
pub fn spawn(command: String, cwd: Option<String>) -> Result<Arc<BackgroundProc>, String> {
let trimmed = command.trim().to_string();
if trimmed.is_empty() {
return Err("empty command".into());
}
if let Some(ref dir) = cwd {
if !PathBuf::from(dir).is_dir() {
return Err(format!("cwd is not a directory: {dir}"));
}
}
let mut cmd = super::build_oneshot_command(&trimmed);
if let Some(ref dir) = cwd {
cmd.current_dir(dir);
}
cmd.stdin(Stdio::null())
.stdout(Stdio::piped())
.stderr(Stdio::piped());
let shared = SharedChild::spawn(&mut cmd).map_err(|e| e.to_string())?;
let stdout_pipe = shared.take_stdout().ok_or("no stdout pipe")?;
let stderr_pipe = shared.take_stderr().ok_or("no stderr pipe")?;
let child = Arc::new(shared);
let started_at_ms = SystemTime::now()
.duration_since(std::time::UNIX_EPOCH)
.map(|d| d.as_millis() as u64)
.unwrap_or(0);
let proc = Arc::new(BackgroundProc {
command: trimmed,
cwd,
started_at_ms,
child,
buffer: Mutex::new(BoundedRingBuffer::new(RING_CAP)),
exited: AtomicBool::new(false),
exit_code: AtomicI32::new(0),
exit_unknown: AtomicBool::new(false),
});
{
let proc_ref = proc.clone();
let mut pipe = stdout_pipe;
thread::spawn(move || {
let mut buf = [0u8; 8192];
loop {
match pipe.read(&mut buf) {
Ok(0) => break,
Ok(n) => proc_ref.buffer.lock().unwrap().push(&buf[..n]),
Err(_) => break,
}
}
});
}
{
let proc_ref = proc.clone();
let mut pipe = stderr_pipe;
thread::spawn(move || {
let mut buf = [0u8; 8192];
loop {
match pipe.read(&mut buf) {
Ok(0) => break,
Ok(n) => proc_ref.buffer.lock().unwrap().push(&buf[..n]),
Err(_) => break,
}
}
});
}
{
let proc_ref = proc.clone();
let child_for_wait = proc.child.clone();
thread::spawn(move || {
match child_for_wait.wait() {
Ok(status) => match status.code() {
Some(code) => proc_ref.exit_code.store(code, Ordering::Release),
None => proc_ref.exit_unknown.store(true, Ordering::Release),
},
Err(_) => proc_ref.exit_unknown.store(true, Ordering::Release),
}
proc_ref.exited.store(true, Ordering::Release);
});
}
Ok(proc)
}
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