570 lines
13 KiB
Rust
570 lines
13 KiB
Rust
use std::{fmt, sync::{Arc, LazyLock, RwLock}};
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use nix::unistd::setpgid;
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use crate::prelude::*;
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bitflags! {
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#[derive(Debug, Copy, Clone)]
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pub struct JobCmdFlags: u8 {
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const LONG = 0b0000_0001; // 0x01
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const PIDS = 0b0000_0010; // 0x02
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const NEW_ONLY = 0b0000_0100; // 0x04
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const RUNNING = 0b0000_1000; // 0x08
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const STOPPED = 0b0001_0000; // 0x10
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const INIT = 0b0010_0000; // 0x20
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}
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}
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#[derive(Debug)]
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pub struct DisplayWaitStatus(pub WtStat);
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impl fmt::Display for DisplayWaitStatus {
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fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
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match &self.0 {
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WtStat::Exited(_, code) => {
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match code {
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0 => write!(f, "done"),
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_ => write!(f, "failed: {}", code),
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}
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}
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WtStat::Signaled(_, signal, _) => {
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write!(f, "signaled: {:?}", signal)
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}
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WtStat::Stopped(_, signal) => {
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write!(f, "stopped: {:?}", signal)
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}
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WtStat::PtraceEvent(_, signal, _) => {
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write!(f, "ptrace event: {:?}", signal)
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}
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WtStat::PtraceSyscall(_) => {
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write!(f, "ptrace syscall")
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}
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WtStat::Continued(_) => {
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write!(f, "continued")
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}
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WtStat::StillAlive => {
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write!(f, "running")
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}
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}
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}
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}
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/// The job table
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pub static JOBS: LazyLock<Arc<RwLock<JobTab>>> = LazyLock::new(|| {
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Arc::new(
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RwLock::new(
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JobTab::new()
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)
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)
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});
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pub fn write_jobs<'a,T,F: FnOnce(&mut JobTab) -> T>(operation: F) -> T {
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unsafe {
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let mut jobs = JOBS.write().unwrap();
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operation(&mut jobs)
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}
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}
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pub fn read_jobs<'a,T,F: FnOnce(&JobTab) -> T>(operation: F) -> T {
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unsafe {
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let jobs = JOBS.read().unwrap();
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operation(&jobs)
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}
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}
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#[derive(Clone,Debug)]
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pub enum JobID {
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Pgid(Pid),
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Pid(Pid),
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TableID(usize),
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Command(String)
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}
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#[derive(Debug,Clone)]
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pub struct ChildProc {
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pgid: Pid,
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pid: Pid,
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command: Option<String>,
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stat: WtStat
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}
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impl<'a> ChildProc {
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pub fn new(pid: Pid, command: Option<&str>, pgid: Option<Pid>) -> ShResult<Self> {
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let command = command.map(|str| str.to_string());
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let stat = if kill(pid,None).is_ok() {
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WtStat::StillAlive
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} else {
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WtStat::Exited(pid, 0)
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};
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let mut child = Self { pgid: pid, pid, command, stat };
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if let Some(pgid) = pgid {
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child.set_pgid(pgid).ok();
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}
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Ok(child)
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}
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pub fn pid(&self) -> Pid {
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self.pid
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}
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pub fn pgid(&self) -> Pid {
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self.pgid
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}
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pub fn cmd(&self) -> Option<&str> {
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self.command.as_ref().map(|cmd| cmd.as_str())
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}
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pub fn stat(&self) -> WtStat {
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self.stat
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}
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pub fn wait(&mut self, flags: Option<WtFlag>) -> Result<WtStat,Errno> {
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let result = waitpid(self.pid, flags);
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if let Ok(stat) = result {
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self.stat = stat
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}
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result
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}
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pub fn kill<T: Into<Option<Signal>>>(&self, sig: T) -> ShResult<()> {
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Ok(kill(self.pid, sig)?)
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}
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pub fn set_pgid(&mut self, pgid: Pid) -> ShResult<()> {
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unsafe { setpgid(self.pid, pgid)? };
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self.pgid = pgid;
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Ok(())
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}
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pub fn set_stat(&mut self, stat: WtStat) {
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self.stat = stat
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}
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pub fn is_alive(&self) -> bool {
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self.stat == WtStat::StillAlive
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}
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pub fn is_stopped(&self) -> bool {
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matches!(self.stat,WtStat::Stopped(..))
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}
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pub fn exited(&self) -> bool {
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matches!(self.stat,WtStat::Exited(..))
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}
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}
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pub struct JobBldr {
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table_id: Option<usize>,
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pgid: Option<Pid>,
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children: Vec<ChildProc>
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}
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impl Default for JobBldr {
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fn default() -> Self {
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Self::new()
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}
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}
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impl JobBldr {
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pub fn new() -> Self {
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Self { table_id: None, pgid: None, children: vec![] }
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}
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pub fn with_id(self, id: usize) -> Self {
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Self {
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table_id: Some(id),
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pgid: self.pgid,
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children: self.children
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}
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}
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pub fn with_pgid(self, pgid: Pid) -> Self {
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Self {
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table_id: self.table_id,
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pgid: Some(pgid),
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children: self.children
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}
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}
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pub fn with_children(self, children: Vec<ChildProc>) -> Self {
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Self {
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table_id: self.table_id,
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pgid: self.pgid,
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children
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}
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}
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pub fn build(self) -> Job {
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Job {
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table_id: self.table_id,
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pgid: self.pgid.unwrap_or(Pid::from_raw(0)),
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children: self.children
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}
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}
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}
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#[derive(Debug,Clone)]
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pub struct Job {
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table_id: Option<usize>,
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pgid: Pid,
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children: Vec<ChildProc>
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}
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impl Job {
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pub fn set_tabid(&mut self, id: usize) {
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self.table_id = Some(id)
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}
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pub fn running(&self) -> bool {
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!self.children.iter().all(|chld| chld.exited())
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}
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pub fn tabid(&self) -> Option<usize> {
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self.table_id
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}
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pub fn pgid(&self) -> Pid {
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self.pgid
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}
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pub fn get_cmds(&self) -> Vec<&str> {
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let mut cmds = vec![];
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for child in &self.children {
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cmds.push(child.cmd().unwrap_or_default())
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}
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cmds
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}
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pub fn set_stats(&mut self, stat: WtStat) {
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for child in self.children.iter_mut() {
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child.set_stat(stat);
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}
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}
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pub fn get_stats(&self) -> Vec<WtStat> {
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self.children
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.iter()
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.map(|chld| chld.stat())
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.collect::<Vec<WtStat>>()
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}
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pub fn get_pids(&self) -> Vec<Pid> {
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self.children
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.iter()
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.map(|chld| chld.pid())
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.collect::<Vec<Pid>>()
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}
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pub fn children(&self) -> &[ChildProc] {
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&self.children
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}
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pub fn children_mut(&mut self) -> &mut Vec<ChildProc> {
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&mut self.children
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}
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pub fn killpg(&mut self, sig: Signal) -> ShResult<()> {
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let stat = match sig {
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Signal::SIGTSTP => WtStat::Stopped(self.pgid, Signal::SIGTSTP),
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Signal::SIGCONT => WtStat::Continued(self.pgid),
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Signal::SIGTERM => WtStat::Signaled(self.pgid, Signal::SIGTERM, false),
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_ => unimplemented!("{}",sig)
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};
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self.set_stats(stat);
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Ok(killpg(self.pgid, sig)?)
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}
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pub fn wait_pgrp<'a>(&mut self) -> ShResult<Vec<WtStat>> {
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let mut stats = vec![];
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for child in self.children.iter_mut() {
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let result = child.wait(Some(WtFlag::WUNTRACED));
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match result {
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Ok(stat) => {
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stats.push(stat);
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}
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Err(Errno::ECHILD) => break,
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Err(e) => return Err(e.into())
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}
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}
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Ok(stats)
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}
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pub fn update_by_id(&mut self, id: JobID, stat: WtStat) -> ShResult<()> {
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match id {
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JobID::Pid(pid) => {
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let query_result = self.children.iter_mut().find(|chld| chld.pid == pid);
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if let Some(child) = query_result {
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child.set_stat(stat);
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}
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}
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JobID::Command(cmd) => {
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let query_result = self.children
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.iter_mut()
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.find(|chld| chld
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.cmd()
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.is_some_and(|chld_cmd| chld_cmd.contains(&cmd))
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);
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if let Some(child) = query_result {
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child.set_stat(stat);
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}
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}
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JobID::TableID(tid) => {
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if self.table_id.is_some_and(|tblid| tblid == tid) {
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for child in self.children.iter_mut() {
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child.set_stat(stat);
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}
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}
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}
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JobID::Pgid(pgid) => {
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if pgid == self.pgid {
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for child in self.children.iter_mut() {
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child.set_stat(stat);
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}
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}
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}
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}
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Ok(())
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}
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pub fn display(&self, job_order: &[usize], flags: JobCmdFlags) -> String {
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let long = flags.contains(JobCmdFlags::LONG);
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let init = flags.contains(JobCmdFlags::INIT);
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let pids = flags.contains(JobCmdFlags::PIDS);
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let current = job_order.last();
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let prev = if job_order.len() > 2 {
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job_order.get(job_order.len() - 2)
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} else {
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None
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};
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let id = self.table_id.unwrap();
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let symbol = if current == self.table_id.as_ref() {
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"+"
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} else if prev == self.table_id.as_ref() {
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"-"
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} else {
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" "
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};
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let padding_count = symbol.len() + id.to_string().len() + 3;
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let padding = " ".repeat(padding_count);
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let mut output = format!("[{}]{}\t", id + 1, symbol);
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for (i, cmd) in self.get_cmds().iter().enumerate() {
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let pid = if pids || init {
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let mut pid = self.get_pids().get(i).unwrap().to_string();
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pid.push(' ');
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pid
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} else {
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"".to_string()
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};
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let job_stat = *self.get_stats().get(i).unwrap();
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let fmt_stat = DisplayWaitStatus(job_stat).to_string();
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let mut stat_line = if init {
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"".to_string()
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} else {
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fmt_stat.clone()
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};
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stat_line = format!("{}{} ",pid,stat_line);
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stat_line = format!("{} {}", stat_line, cmd);
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stat_line = match job_stat {
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WtStat::Stopped(..) | WtStat::Signaled(..) => stat_line.styled(Style::Magenta),
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WtStat::Exited(_, code) => {
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match code {
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0 => stat_line.styled(Style::Green),
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_ => stat_line.styled(Style::Red),
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}
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}
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_ => stat_line.styled(Style::Cyan)
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};
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if i != self.get_cmds().len() - 1 {
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stat_line = format!("{} |",stat_line);
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}
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let stat_final = if long {
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format!(
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"{}{} {}",
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if i != 0 { &padding } else { "" },
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self.get_pids().get(i).unwrap(),
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stat_line
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)
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} else {
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format!(
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"{}{}",
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if i != 0 { &padding } else { "" },
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stat_line
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)
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};
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output.push_str(&stat_final);
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output.push('\n');
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}
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output
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}
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}
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pub struct JobTab {
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fg: Option<Job>,
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order: Vec<usize>,
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new_updates: Vec<usize>,
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jobs: Vec<Option<Job>>
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}
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impl JobTab {
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pub fn new() -> Self {
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Self { fg: None, order: vec![], new_updates: vec![], jobs: vec![] }
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}
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pub fn take_fg(&mut self) -> Option<Job> {
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self.fg.take()
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}
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fn next_open_pos(&self) -> usize {
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if let Some(position) = self.jobs.iter().position(|slot| slot.is_none()) {
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position
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} else {
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self.jobs.len()
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}
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}
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pub fn jobs(&self) -> &Vec<Option<Job>> {
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&self.jobs
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}
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pub fn jobs_mut(&mut self) -> &mut Vec<Option<Job>> {
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&mut self.jobs
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}
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pub fn curr_job(&self) -> Option<usize> {
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self.order.last().copied()
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}
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pub fn prev_job(&self) -> Option<usize> {
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self.order.last().copied()
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}
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fn prune_jobs(&mut self) {
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while let Some(job) = self.jobs.last() {
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if job.is_none() {
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self.jobs.pop();
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} else {
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break
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}
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}
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}
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pub fn insert_job(&mut self, mut job: Job, silent: bool) -> ShResult<usize> {
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self.prune_jobs();
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let tab_pos = if let Some(id) = job.tabid() { id } else { self.next_open_pos() };
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job.set_tabid(tab_pos);
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self.order.push(tab_pos);
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if !silent {
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write(borrow_fd(1),format!("{}", job.display(&self.order, JobCmdFlags::INIT)).as_bytes())?;
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}
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if tab_pos == self.jobs.len() {
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self.jobs.push(Some(job))
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} else {
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self.jobs[tab_pos] = Some(job);
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}
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Ok(tab_pos)
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}
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pub fn order(&self) -> &[usize] {
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&self.order
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}
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pub fn query(&self, identifier: JobID) -> Option<&Job> {
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match identifier {
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// Match by process group ID
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JobID::Pgid(pgid) => {
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self.jobs.iter().find_map(|job| {
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job.as_ref().filter(|j| j.pgid == pgid)
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})
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}
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// Match by process ID
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JobID::Pid(pid) => {
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self.jobs.iter().find_map(|job| {
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job.as_ref().filter(|j| j.children.iter().any(|child| child.pid == pid))
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})
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}
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// Match by table ID (index in the job table)
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JobID::TableID(id) => {
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self.jobs.get(id).and_then(|job| job.as_ref())
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}
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// Match by command name (partial match)
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JobID::Command(cmd) => {
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self.jobs.iter().find_map(|job| {
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job.as_ref().filter(|j| {
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j.children.iter().any(|child| {
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child.command.as_ref().is_some_and(|c| c.contains(&cmd))
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})
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})
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})
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}
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}
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}
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pub fn query_mut(&mut self, identifier: JobID) -> Option<&mut Job> {
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match identifier {
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// Match by process group ID
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JobID::Pgid(pgid) => {
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self.jobs.iter_mut().find_map(|job| {
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job.as_mut().filter(|j| j.pgid == pgid)
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})
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}
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// Match by process ID
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JobID::Pid(pid) => {
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self.jobs.iter_mut().find_map(|job| {
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job.as_mut().filter(|j| j.children.iter().any(|child| child.pid == pid))
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})
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}
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// Match by table ID (index in the job table)
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JobID::TableID(id) => {
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self.jobs.get_mut(id).and_then(|job| job.as_mut())
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}
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// Match by command name (partial match)
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JobID::Command(cmd) => {
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self.jobs.iter_mut().find_map(|job| {
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job.as_mut().filter(|j| {
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j.children.iter().any(|child| {
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child.command.as_ref().is_some_and(|c| c.contains(&cmd))
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})
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})
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})
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}
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}
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}
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pub fn get_fg(&self) -> Option<&Job> {
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self.fg.as_ref()
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}
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pub fn get_fg_mut(&mut self) -> Option<&mut Job> {
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self.fg.as_mut()
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}
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pub fn new_fg<'a>(&mut self, job: Job) -> ShResult<Vec<WtStat>> {
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let pgid = job.pgid();
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self.fg = Some(job);
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attach_tty(pgid)?;
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let statuses = self.fg.as_mut().unwrap().wait_pgrp()?;
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attach_tty(getpgrp())?;
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Ok(statuses)
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}
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pub fn fg_to_bg(&mut self, stat: WtStat) -> ShResult<()> {
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if self.fg.is_none() {
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return Ok(())
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}
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take_term()?;
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let fg = std::mem::take(&mut self.fg);
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if let Some(mut job) = fg {
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job.set_stats(stat);
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self.insert_job(job, false)?;
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}
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Ok(())
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|
}
|
|
pub fn bg_to_fg(&mut self, shenv: &mut ShEnv, id: JobID) -> ShResult<()> {
|
|
let job = self.remove_job(id);
|
|
if let Some(job) = job {
|
|
super::wait_fg(job, shenv)?;
|
|
}
|
|
Ok(())
|
|
}
|
|
pub fn remove_job(&mut self, id: JobID) -> Option<Job> {
|
|
let tabid = self.query(id).map(|job| job.tabid().unwrap());
|
|
if let Some(tabid) = tabid {
|
|
self.jobs.get_mut(tabid).and_then(Option::take)
|
|
} else {
|
|
None
|
|
}
|
|
}
|
|
pub fn print_jobs(&self, flags: JobCmdFlags) -> ShResult<()> {
|
|
let jobs = if flags.contains(JobCmdFlags::NEW_ONLY) {
|
|
&self.jobs
|
|
.iter()
|
|
.filter(|job| job.as_ref().is_some_and(|job| self.new_updates.contains(&job.tabid().unwrap())))
|
|
.map(|job| job.as_ref())
|
|
.collect::<Vec<Option<&Job>>>()
|
|
} else {
|
|
&self.jobs
|
|
.iter()
|
|
.map(|job| job.as_ref())
|
|
.collect::<Vec<Option<&Job>>>()
|
|
};
|
|
for job in jobs.iter().flatten() {
|
|
// Skip foreground job
|
|
let id = job.tabid().unwrap();
|
|
// Filter jobs based on flags
|
|
if flags.contains(JobCmdFlags::RUNNING) && !matches!(job.get_stats().get(id).unwrap(), WtStat::StillAlive | WtStat::Continued(_)) {
|
|
continue;
|
|
}
|
|
if flags.contains(JobCmdFlags::STOPPED) && !matches!(job.get_stats().get(id).unwrap(), WtStat::Stopped(_,_)) {
|
|
continue;
|
|
}
|
|
// Print the job in the selected format
|
|
write(borrow_fd(1), format!("{}\n",job.display(&self.order,flags)).as_bytes())?;
|
|
}
|
|
Ok(())
|
|
}
|
|
}
|