Kernel: Add `sid` and `pgid` to `Credentials`

There are places in the kernel that would like to have access
to `pgid` credentials in certain circumstances.

I haven't found any use cases for `sid` yet, but `sid` and `pgid` are
both changed with `sys$setpgid`, so it seemed sensical to add it.

In Linux, `man 7 credentials` also mentions both the session id and
process group id, so this isn't unprecedented.

1 files changed, 6 insertions, 2 deletions

diff --git a/Kernel/Credentials.h b/Kernel/Credentials.h
index e951d57c21..25e002a25e 100644
--- a/Kernel/Credentials.h
+++ b/Kernel/Credentials.h
@@ -14,7 +14,7 @@ namespace Kernel {
 
 class Credentials final : public AtomicRefCounted<Credentials> {
 public:
-    static ErrorOr<NonnullRefPtr<Credentials>> create(UserID uid, GroupID gid, UserID euid, GroupID egid, UserID suid, GroupID sgid, Span<GroupID const> extra_gids);
+    static ErrorOr<NonnullRefPtr<Credentials>> create(UserID uid, GroupID gid, UserID euid, GroupID egid, UserID suid, GroupID sgid, Span<GroupID const> extra_gids, SessionID sid, ProcessGroupID pgid);
     ~Credentials();
 
     bool is_superuser() const { return euid() == 0; }
@@ -26,11 +26,13 @@ public:
     UserID suid() const { return m_suid; }
     GroupID sgid() const { return m_sgid; }
     Span<GroupID const> extra_gids() const { return m_extra_gids.span(); }
+    SessionID sid() const { return m_sid; };
+    ProcessGroupID pgid() const { return m_pgid; }
 
     bool in_group(GroupID) const;
 
 private:
-    Credentials(UserID uid, GroupID gid, UserID euid, GroupID egid, UserID suid, GroupID sgid, FixedArray<GroupID> extra_gids);
+    Credentials(UserID uid, GroupID gid, UserID euid, GroupID egid, UserID suid, GroupID sgid, FixedArray<GroupID> extra_gids, SessionID sid, ProcessGroupID pgid);
 
     UserID m_uid;
     GroupID m_gid;
@@ -39,6 +41,8 @@ private:
     UserID m_suid;
     GroupID m_sgid;
     FixedArray<GroupID> m_extra_gids;
+    SessionID m_sid;
+    ProcessGroupID m_pgid;
 };
 
 }