diff --git a/kernel/proc/proc.c b/kernel/proc/proc.c
index 3d91ad6..0a19da2 100644
--- a/kernel/proc/proc.c
+++ b/kernel/proc/proc.c
@@ -478,6 +478,13 @@ fork(void)
   // POSIX: the child inherits process group, session and all four ids.
   np->pgid = myproc()->pgid;
   np->sid  = myproc()->sid;
+  // The controlling terminal is a property of the *session*, so it crosses
+  // fork() with the session id rather than being re-established. It was set
+  // only by TIOCSCTTY and never inherited, so every child of a shell had
+  // ctty 0 -- which is why plain `ps` listed the shell and nothing it had
+  // started, background jobs included. A job that is running on your terminal
+  // is on your terminal whoever forked it.
+  np->ctty = myproc()->ctty;
   np->uid  = myproc()->uid;  np->euid = myproc()->euid;  np->suid = myproc()->suid;
   np->gid  = myproc()->gid;  np->egid = myproc()->egid;  np->sgid = myproc()->sgid;