464 lines
11 KiB
Rust
464 lines
11 KiB
Rust
use crate::{libsh::{error::ShResult, term::{Style, Styled}}, prelude::*, procio::borrow_fd, state::{set_status, write_jobs}};
|
|
|
|
pub const SIG_EXIT_OFFSET: i32 = 128;
|
|
|
|
bitflags! {
|
|
#[derive(Debug, Copy, Clone)]
|
|
pub struct JobCmdFlags: u8 {
|
|
const LONG = 0b0000_0001; // 0x01
|
|
const PIDS = 0b0000_0010; // 0x02
|
|
const NEW_ONLY = 0b0000_0100; // 0x04
|
|
const RUNNING = 0b0000_1000; // 0x08
|
|
const STOPPED = 0b0001_0000; // 0x10
|
|
const INIT = 0b0010_0000; // 0x20
|
|
}
|
|
}
|
|
|
|
#[derive(Debug)]
|
|
pub struct DisplayWaitStatus(pub WtStat);
|
|
|
|
impl fmt::Display for DisplayWaitStatus {
|
|
fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
|
|
match &self.0 {
|
|
WtStat::Exited(_, code) => {
|
|
match code {
|
|
0 => write!(f, "done"),
|
|
_ => write!(f, "failed: {}", code),
|
|
}
|
|
}
|
|
WtStat::Signaled(_, signal, _) => {
|
|
write!(f, "signaled: {:?}", signal)
|
|
}
|
|
WtStat::Stopped(_, signal) => {
|
|
write!(f, "stopped: {:?}", signal)
|
|
}
|
|
WtStat::PtraceEvent(_, signal, _) => {
|
|
write!(f, "ptrace event: {:?}", signal)
|
|
}
|
|
WtStat::PtraceSyscall(_) => {
|
|
write!(f, "ptrace syscall")
|
|
}
|
|
WtStat::Continued(_) => {
|
|
write!(f, "continued")
|
|
}
|
|
WtStat::StillAlive => {
|
|
write!(f, "running")
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
#[derive(Clone,Debug)]
|
|
pub enum JobID {
|
|
Pgid(Pid),
|
|
Pid(Pid),
|
|
TableID(usize),
|
|
Command(String)
|
|
}
|
|
|
|
#[derive(Debug,Clone)]
|
|
pub struct ChildProc {
|
|
pgid: Pid,
|
|
pid: Pid,
|
|
command: Option<String>,
|
|
stat: WtStat
|
|
}
|
|
|
|
impl<'a> ChildProc {
|
|
pub fn new(pid: Pid, command: Option<&str>, pgid: Option<Pid>) -> ShResult<Self> {
|
|
let command = command.map(|str| str.to_string());
|
|
let stat = if kill(pid,None).is_ok() {
|
|
WtStat::StillAlive
|
|
} else {
|
|
WtStat::Exited(pid, 0)
|
|
};
|
|
let mut child = Self { pgid: pid, pid, command, stat };
|
|
if let Some(pgid) = pgid {
|
|
child.set_pgid(pgid).ok();
|
|
}
|
|
flog!(TRACE, "new child: {:?}", child);
|
|
Ok(child)
|
|
}
|
|
pub fn pid(&self) -> Pid {
|
|
self.pid
|
|
}
|
|
pub fn pgid(&self) -> Pid {
|
|
self.pgid
|
|
}
|
|
pub fn cmd(&self) -> Option<&str> {
|
|
self.command.as_ref().map(|cmd| cmd.as_str())
|
|
}
|
|
pub fn stat(&self) -> WtStat {
|
|
self.stat
|
|
}
|
|
pub fn wait(&mut self, flags: Option<WtFlag>) -> Result<WtStat,Errno> {
|
|
let result = waitpid(self.pid, flags);
|
|
if let Ok(stat) = result {
|
|
self.stat = stat
|
|
}
|
|
result
|
|
}
|
|
pub fn kill<T: Into<Option<Signal>>>(&self, sig: T) -> ShResult<()> {
|
|
Ok(kill(self.pid, sig)?)
|
|
}
|
|
pub fn set_pgid(&mut self, pgid: Pid) -> ShResult<()> {
|
|
setpgid(self.pid, pgid)?;
|
|
self.pgid = pgid;
|
|
Ok(())
|
|
}
|
|
pub fn set_stat(&mut self, stat: WtStat) {
|
|
self.stat = stat
|
|
}
|
|
pub fn is_alive(&self) -> bool {
|
|
self.stat == WtStat::StillAlive
|
|
}
|
|
pub fn is_stopped(&self) -> bool {
|
|
matches!(self.stat,WtStat::Stopped(..))
|
|
}
|
|
pub fn exited(&self) -> bool {
|
|
matches!(self.stat,WtStat::Exited(..))
|
|
}
|
|
}
|
|
|
|
pub struct JobBldr {
|
|
table_id: Option<usize>,
|
|
pgid: Option<Pid>,
|
|
children: Vec<ChildProc>
|
|
}
|
|
|
|
impl Default for JobBldr {
|
|
fn default() -> Self {
|
|
Self::new()
|
|
}
|
|
}
|
|
|
|
impl JobBldr {
|
|
pub fn new() -> Self {
|
|
Self { table_id: None, pgid: None, children: vec![] }
|
|
}
|
|
pub fn with_id(self, id: usize) -> Self {
|
|
Self {
|
|
table_id: Some(id),
|
|
pgid: self.pgid,
|
|
children: self.children
|
|
}
|
|
}
|
|
pub fn with_pgid(self, pgid: Pid) -> Self {
|
|
Self {
|
|
table_id: self.table_id,
|
|
pgid: Some(pgid),
|
|
children: self.children
|
|
}
|
|
}
|
|
pub fn set_pgid(&mut self, pgid: Pid) {
|
|
self.pgid = Some(pgid);
|
|
}
|
|
pub fn pgid(&self) -> Option<Pid> {
|
|
self.pgid
|
|
}
|
|
pub fn with_children(self, children: Vec<ChildProc>) -> Self {
|
|
Self {
|
|
table_id: self.table_id,
|
|
pgid: self.pgid,
|
|
children
|
|
}
|
|
}
|
|
pub fn push_child(&mut self, child: ChildProc) {
|
|
self.children.push(child);
|
|
}
|
|
pub fn build(self) -> Job {
|
|
Job {
|
|
table_id: self.table_id,
|
|
pgid: self.pgid.unwrap_or(Pid::from_raw(0)),
|
|
children: self.children
|
|
}
|
|
}
|
|
}
|
|
|
|
#[derive(Debug,Clone)]
|
|
pub struct Job {
|
|
table_id: Option<usize>,
|
|
pgid: Pid,
|
|
children: Vec<ChildProc>
|
|
}
|
|
|
|
impl Job {
|
|
pub fn set_tabid(&mut self, id: usize) {
|
|
self.table_id = Some(id)
|
|
}
|
|
pub fn running(&self) -> bool {
|
|
!self.children.iter().all(|chld| chld.exited())
|
|
}
|
|
pub fn tabid(&self) -> Option<usize> {
|
|
self.table_id
|
|
}
|
|
pub fn pgid(&self) -> Pid {
|
|
self.pgid
|
|
}
|
|
pub fn get_cmds(&self) -> Vec<&str> {
|
|
let mut cmds = vec![];
|
|
for child in &self.children {
|
|
cmds.push(child.cmd().unwrap_or_default())
|
|
}
|
|
cmds
|
|
}
|
|
pub fn set_stats(&mut self, stat: WtStat) {
|
|
for child in self.children.iter_mut() {
|
|
child.set_stat(stat);
|
|
}
|
|
}
|
|
pub fn get_stats(&self) -> Vec<WtStat> {
|
|
self.children
|
|
.iter()
|
|
.map(|chld| chld.stat())
|
|
.collect::<Vec<WtStat>>()
|
|
}
|
|
pub fn get_pids(&self) -> Vec<Pid> {
|
|
self.children
|
|
.iter()
|
|
.map(|chld| chld.pid())
|
|
.collect::<Vec<Pid>>()
|
|
}
|
|
pub fn children(&self) -> &[ChildProc] {
|
|
&self.children
|
|
}
|
|
pub fn children_mut(&mut self) -> &mut Vec<ChildProc> {
|
|
&mut self.children
|
|
}
|
|
pub fn killpg(&mut self, sig: Signal) -> ShResult<()> {
|
|
let stat = match sig {
|
|
Signal::SIGTSTP => WtStat::Stopped(self.pgid, Signal::SIGTSTP),
|
|
Signal::SIGCONT => WtStat::Continued(self.pgid),
|
|
Signal::SIGTERM => WtStat::Signaled(self.pgid, Signal::SIGTERM, false),
|
|
_ => unimplemented!("{}",sig)
|
|
};
|
|
self.set_stats(stat);
|
|
Ok(killpg(self.pgid, sig)?)
|
|
}
|
|
pub fn wait_pgrp<'a>(&mut self) -> ShResult<Vec<WtStat>> {
|
|
let mut stats = vec![];
|
|
for child in self.children.iter_mut() {
|
|
let result = child.wait(Some(WtFlag::WUNTRACED));
|
|
match result {
|
|
Ok(stat) => {
|
|
stats.push(stat);
|
|
}
|
|
Err(Errno::ECHILD) => break,
|
|
Err(e) => return Err(e.into())
|
|
}
|
|
}
|
|
Ok(stats)
|
|
}
|
|
pub fn update_by_id(&mut self, id: JobID, stat: WtStat) -> ShResult<()> {
|
|
match id {
|
|
JobID::Pid(pid) => {
|
|
let query_result = self.children.iter_mut().find(|chld| chld.pid == pid);
|
|
if let Some(child) = query_result {
|
|
child.set_stat(stat);
|
|
}
|
|
}
|
|
JobID::Command(cmd) => {
|
|
let query_result = self.children
|
|
.iter_mut()
|
|
.find(|chld| chld
|
|
.cmd()
|
|
.is_some_and(|chld_cmd| chld_cmd.contains(&cmd))
|
|
);
|
|
if let Some(child) = query_result {
|
|
child.set_stat(stat);
|
|
}
|
|
}
|
|
JobID::TableID(tid) => {
|
|
if self.table_id.is_some_and(|tblid| tblid == tid) {
|
|
for child in self.children.iter_mut() {
|
|
child.set_stat(stat);
|
|
}
|
|
}
|
|
}
|
|
JobID::Pgid(pgid) => {
|
|
if pgid == self.pgid {
|
|
for child in self.children.iter_mut() {
|
|
child.set_stat(stat);
|
|
}
|
|
}
|
|
}
|
|
}
|
|
Ok(())
|
|
}
|
|
pub fn display(&self, job_order: &[usize], flags: JobCmdFlags) -> String {
|
|
let long = flags.contains(JobCmdFlags::LONG);
|
|
let init = flags.contains(JobCmdFlags::INIT);
|
|
let pids = flags.contains(JobCmdFlags::PIDS);
|
|
|
|
let current = job_order.last();
|
|
let prev = if job_order.len() > 2 {
|
|
job_order.get(job_order.len() - 2)
|
|
} else {
|
|
None
|
|
};
|
|
|
|
let id = self.table_id.unwrap();
|
|
let symbol = if current == self.table_id.as_ref() {
|
|
"+"
|
|
} else if prev == self.table_id.as_ref() {
|
|
"-"
|
|
} else {
|
|
" "
|
|
};
|
|
let padding_count = symbol.len() + id.to_string().len() + 3;
|
|
let padding = " ".repeat(padding_count);
|
|
|
|
let mut output = format!("[{}]{}\t", id + 1, symbol);
|
|
for (i, cmd) in self.get_cmds().iter().enumerate() {
|
|
let pid = if pids || init {
|
|
let mut pid = self.get_pids().get(i).unwrap().to_string();
|
|
pid.push(' ');
|
|
pid
|
|
} else {
|
|
"".to_string()
|
|
};
|
|
let job_stat = *self.get_stats().get(i).unwrap();
|
|
let fmt_stat = DisplayWaitStatus(job_stat).to_string();
|
|
|
|
let mut stat_line = if init {
|
|
"".to_string()
|
|
} else {
|
|
fmt_stat.clone()
|
|
};
|
|
stat_line = format!("{}{} ",pid,stat_line);
|
|
stat_line = format!("{} {}", stat_line, cmd);
|
|
stat_line = match job_stat {
|
|
WtStat::Stopped(..) | WtStat::Signaled(..) => stat_line.styled(Style::Magenta),
|
|
WtStat::Exited(_, code) => {
|
|
match code {
|
|
0 => stat_line.styled(Style::Green),
|
|
_ => stat_line.styled(Style::Red),
|
|
}
|
|
}
|
|
_ => stat_line.styled(Style::Cyan)
|
|
};
|
|
if i != self.get_cmds().len() - 1 {
|
|
stat_line = format!("{} |",stat_line);
|
|
}
|
|
|
|
let stat_final = if long {
|
|
format!(
|
|
"{}{} {}",
|
|
if i != 0 { &padding } else { "" },
|
|
self.get_pids().get(i).unwrap(),
|
|
stat_line
|
|
)
|
|
} else {
|
|
format!(
|
|
"{}{}",
|
|
if i != 0 { &padding } else { "" },
|
|
stat_line
|
|
)
|
|
};
|
|
output.push_str(&stat_final);
|
|
output.push('\n');
|
|
}
|
|
output
|
|
}
|
|
}
|
|
|
|
pub fn term_ctlr() -> Pid {
|
|
tcgetpgrp(borrow_fd(0)).unwrap_or(getpgrp())
|
|
}
|
|
|
|
/// Calls attach_tty() on the shell's process group to retake control of the terminal
|
|
pub fn take_term() -> ShResult<()> {
|
|
attach_tty(getpgrp())?;
|
|
Ok(())
|
|
}
|
|
|
|
pub fn disable_reaping() -> ShResult<()> {
|
|
flog!(TRACE, "Disabling reaping");
|
|
unsafe { signal(Signal::SIGCHLD, SigHandler::Handler(crate::signal::ignore_sigchld)) }?;
|
|
Ok(())
|
|
}
|
|
|
|
pub fn enable_reaping() -> ShResult<()> {
|
|
flog!(TRACE, "Enabling reaping");
|
|
unsafe { signal(Signal::SIGCHLD, SigHandler::Handler(crate::signal::handle_sigchld)) }.unwrap();
|
|
Ok(())
|
|
}
|
|
|
|
/// Waits on the current foreground job and updates the shell's last status code
|
|
pub fn wait_fg(job: Job) -> ShResult<()> {
|
|
flog!(TRACE, "Waiting on foreground job");
|
|
let mut code = 0;
|
|
attach_tty(job.pgid())?;
|
|
disable_reaping()?;
|
|
let statuses = write_jobs(|j| j.new_fg(job))?;
|
|
for status in statuses {
|
|
match status {
|
|
WtStat::Exited(_, exit_code) => {
|
|
code = exit_code;
|
|
}
|
|
WtStat::Stopped(_, sig) => {
|
|
write_jobs(|j| j.fg_to_bg(status))?;
|
|
code = SIG_EXIT_OFFSET + sig as i32;
|
|
},
|
|
WtStat::Signaled(_, sig, _) => {
|
|
if sig == Signal::SIGTSTP {
|
|
write_jobs(|j| j.fg_to_bg(status))?;
|
|
}
|
|
code = SIG_EXIT_OFFSET + sig as i32;
|
|
},
|
|
_ => { /* Do nothing */ }
|
|
}
|
|
}
|
|
take_term()?;
|
|
set_status(code);
|
|
flog!(TRACE, "exit code: {}", code);
|
|
enable_reaping()?;
|
|
Ok(())
|
|
}
|
|
|
|
pub fn dispatch_job(job: Job, is_bg: bool) -> ShResult<()> {
|
|
if is_bg {
|
|
write_jobs(|j| {
|
|
j.insert_job(job, false)
|
|
})?;
|
|
} else {
|
|
wait_fg(job)?;
|
|
}
|
|
Ok(())
|
|
}
|
|
|
|
pub fn attach_tty(pgid: Pid) -> ShResult<()> {
|
|
// If we aren't attached to a terminal, the pgid already controls it, or the process group does not exist
|
|
// Then return ok
|
|
if !isatty(0).unwrap_or(false) || pgid == term_ctlr() || killpg(pgid, None).is_err() {
|
|
return Ok(())
|
|
}
|
|
flog!(TRACE, "Attaching tty to pgid: {}",pgid);
|
|
|
|
if pgid == getpgrp() && term_ctlr() != getpgrp() {
|
|
kill(term_ctlr(), Signal::SIGTTOU).ok();
|
|
}
|
|
|
|
let mut new_mask = SigSet::empty();
|
|
let mut mask_bkup = SigSet::empty();
|
|
|
|
new_mask.add(Signal::SIGTSTP);
|
|
new_mask.add(Signal::SIGTTIN);
|
|
new_mask.add(Signal::SIGTTOU);
|
|
|
|
pthread_sigmask(SigmaskHow::SIG_BLOCK, Some(&mut new_mask), Some(&mut mask_bkup))?;
|
|
|
|
let result = tcsetpgrp(borrow_fd(0), pgid);
|
|
|
|
pthread_sigmask(SigmaskHow::SIG_SETMASK, Some(&mut mask_bkup), Some(&mut new_mask))?;
|
|
|
|
match result {
|
|
Ok(_) => return Ok(()),
|
|
Err(e) => {
|
|
flog!(ERROR, "error while switching term control: {}",e);
|
|
tcsetpgrp(borrow_fd(0), getpgrp())?;
|
|
Ok(())
|
|
}
|
|
}
|
|
}
|