Add syscall getsid, setsid and refactor other syscalls

services/libs/jinux-std/src/syscall/getsid.rs

@@ -0,0 +1,30 @@
+use crate::log_syscall_entry;
+use crate::prelude::*;
+use crate::process::{process_table, Pid};
+
+use super::{SyscallReturn, SYS_GETSID};
+
+pub fn sys_getsid(pid: Pid) -> Result<SyscallReturn> {
+    log_syscall_entry!(SYS_GETSID);
+    debug!("pid = {}", pid);
+
+    let session = current!().session().unwrap();
+    let sid = session.sid();
+
+    if pid == 0 {
+        return Ok(SyscallReturn::Return(sid as _));
+    }
+
+    let Some(process) = process_table::get_process(&pid) else {
+        return_errno_with_message!(Errno::ESRCH, "the process does not exist")
+    };
+
+    if !Arc::ptr_eq(&session, &process.session().unwrap()) {
+        return_errno_with_message!(
+            Errno::EPERM,
+            "the process and current process does not belong to the same session"
+        );
+    }
+
+    Ok(SyscallReturn::Return(sid as _))
+}

services/libs/jinux-std/src/syscall/kill.rs

@@ -34,14 +34,14 @@ pub fn do_sys_kill(filter: ProcessFilter, sig_num: SigNum) -> Result<()> {
             }
         }
         ProcessFilter::WithPid(pid) => {
-            if let Some(process) = process_table::pid_to_process(pid) {
+            if let Some(process) = process_table::get_process(&pid) {
                 process.enqueue_signal(Box::new(signal));
             } else {
                 return_errno_with_message!(Errno::ESRCH, "No such process in process table");
             }
         }
         ProcessFilter::WithPgid(pgid) => {
-            if let Some(process_group) = process_table::pgid_to_process_group(pgid) {
+            if let Some(process_group) = process_table::get_process_group(&pgid) {
                 process_group.user_signal(signal);
             } else {
                 return_errno_with_message!(Errno::ESRCH, "No such process group in process table");

services/libs/jinux-std/src/syscall/mod.rs

@@ -77,12 +77,14 @@ use self::connect::sys_connect;
 use self::execve::sys_execveat;
 use self::getpeername::sys_getpeername;
 use self::getrandom::sys_getrandom;
+use self::getsid::sys_getsid;
 use self::getsockname::sys_getsockname;
 use self::getsockopt::sys_getsockopt;
 use self::listen::sys_listen;
 use self::pread64::sys_pread64;
 use self::recvfrom::sys_recvfrom;
 use self::sendto::sys_sendto;
+use self::setsid::sys_setsid;
 use self::setsockopt::sys_setsockopt;
 use self::shutdown::sys_shutdown;
 use self::socket::sys_socket;
@@ -119,6 +121,7 @@ mod getpgrp;
 mod getpid;
 mod getppid;
 mod getrandom;
+mod getsid;
 mod getsockname;
 mod getsockopt;
 mod gettid;
@@ -155,6 +158,7 @@ mod sendto;
 mod set_robust_list;
 mod set_tid_address;
 mod setpgid;
+mod setsid;
 mod setsockopt;
 mod shutdown;
 mod socket;
@@ -274,6 +278,8 @@ define_syscall_nums!(
     SYS_SETPGID = 109,
     SYS_GETPPID = 110,
     SYS_GETPGRP = 111,
+    SYS_SETSID = 112,
+    SYS_GETSID = 124,
     SYS_STATFS = 137,
     SYS_FSTATFS = 138,
     SYS_PRCTL = 157,
@@ -435,6 +441,8 @@ pub fn syscall_dispatch(
         SYS_SETPGID => syscall_handler!(2, sys_setpgid, args),
         SYS_GETPPID => syscall_handler!(0, sys_getppid),
         SYS_GETPGRP => syscall_handler!(0, sys_getpgrp),
+        SYS_SETSID => syscall_handler!(0, sys_setsid),
+        SYS_GETSID => syscall_handler!(1, sys_getsid, args),
         SYS_STATFS => syscall_handler!(2, sys_statfs, args),
         SYS_FSTATFS => syscall_handler!(2, sys_fstatfs, args),
         SYS_PRCTL => syscall_handler!(5, sys_prctl, args),

services/libs/jinux-std/src/syscall/setpgid.rs

@@ -1,8 +1,6 @@
-use crate::{
-    log_syscall_entry,
-    prelude::*,
-    process::{process_table, Pgid, Pid, ProcessGroup},
-};
+use crate::log_syscall_entry;
+use crate::prelude::*;
+use crate::process::{process_table, Pgid, Pid};
 
 use super::{SyscallReturn, SYS_SETPGID};
 
@@ -15,7 +13,7 @@ pub fn sys_setpgid(pid: Pid, pgid: Pgid) -> Result<SyscallReturn> {
     let pgid = if pgid == 0 { pid } else { pgid };
     debug!("pid = {}, pgid = {}", pid, pgid);
 
-    if pid != current.pid() && !current.children().lock().contains_key(&pid) {
+    if pid != current.pid() && !current.has_child(&pid) {
         return_errno_with_message!(
             Errno::ESRCH,
             "cannot set pgid for process other than current or children of current"
@@ -25,27 +23,14 @@ pub fn sys_setpgid(pid: Pid, pgid: Pgid) -> Result<SyscallReturn> {
     // How can we determine a child process has called execve?
 
     // only can move process to an existing group or self
-    if pgid != pid && process_table::pgid_to_process_group(pgid).is_none() {
+    if pgid != pid && !process_table::contain_process_group(&pgid) {
         return_errno_with_message!(Errno::EPERM, "process group must exist");
     }
 
-    let process = process_table::pid_to_process(pid)
+    let process = process_table::get_process(&pid)
         .ok_or(Error::with_message(Errno::ESRCH, "process does not exist"))?;
 
-    // if the process already belongs to the process group
-    if process.pgid() == pgid {
-        return Ok(SyscallReturn::Return(0));
-    }
-
-    if let Some(process_group) = process_table::pgid_to_process_group(pgid) {
-        process_group.add_process(process.clone());
-        process.set_process_group(Arc::downgrade(&process_group));
-    } else {
-        let new_process_group = Arc::new(ProcessGroup::new(process.clone()));
-        // new_process_group.add_process(process.clone());
-        process.set_process_group(Arc::downgrade(&new_process_group));
-        process_table::add_process_group(new_process_group);
-    }
+    process.to_other_group(pgid)?;
 
     Ok(SyscallReturn::Return(0))
 }

services/libs/jinux-std/src/syscall/setsid.rs

@@ -0,0 +1,13 @@
+use crate::log_syscall_entry;
+use crate::prelude::*;
+
+use super::{SyscallReturn, SYS_SETSID};
+
+pub fn sys_setsid() -> Result<SyscallReturn> {
+    log_syscall_entry!(SYS_SETSID);
+
+    let current = current!();
+    let session = current.to_new_session()?;
+
+    Ok(SyscallReturn::Return(session.sid() as _))
+}