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Foreground process group should be none if the process group exits

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This commit is contained in:
Jianfeng Jiang
2023-07-26 16:12:23 +08:00
committed by Tate, Hongliang Tian
parent dbfb2e1a62
commit a088acd0ec
3 changed files with 37 additions and 39 deletions
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28
services/libs/jinux-std/src/device/tty/mod.rs
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@ -5,7 +5,8 @@ use self::line_discipline::LineDiscipline;
use super::*;
use crate::fs::utils::{IoEvents, IoctlCmd, Poller};
use crate::prelude::*;
use crate::process::Pgid;
use crate::process::process_group::ProcessGroup;
use crate::process::{process_table, Pgid};
use crate::util::{read_val_from_user, write_val_to_user};
pub mod driver;
@ -40,8 +41,8 @@ impl Tty {
}
/// Set foreground process group
pub fn set_fg(&self, pgid: Pgid) {
self.ldisc.set_fg(pgid);
pub fn set_fg(&self, process_group: Weak<ProcessGroup>) {
self.ldisc.set_fg(process_group);
}
pub fn set_driver(&self, driver: Weak<TtyDriver>) {
@ -90,21 +91,20 @@ impl Device for Tty {
Ok(0)
}
IoctlCmd::TIOCGPGRP => {
// FIXME: Get the process group ID of the foreground process group on this terminal.
let fg_pgid = self.ldisc.fg_pgid();
match fg_pgid {
None => return_errno_with_message!(Errno::ENOENT, "No fg process group"),
Some(fg_pgid) => {
debug!("fg_pgid = {}", fg_pgid);
write_val_to_user(arg, &fg_pgid)?;
Ok(0)
}
}
let Some(fg_pgid) = self.ldisc.fg_pgid() else {
return_errno_with_message!(Errno::ENOENT, "No fg process group")
};
debug!("fg_pgid = {}", fg_pgid);
write_val_to_user(arg, &fg_pgid)?;
Ok(0)
}
IoctlCmd::TIOCSPGRP => {
// Set the process group id of fg progress group
let pgid = read_val_from_user::<i32>(arg)?;
self.ldisc.set_fg(pgid);
match process_table::pgid_to_process_group(pgid) {
None => self.ldisc.set_fg(Weak::new()),
Some(process_group) => self.ldisc.set_fg(Arc::downgrade(&process_group)),
}
Ok(0)
}
IoctlCmd::TCSETS => {