diff options
Diffstat (limited to 'proc/mgt.c')
| -rw-r--r-- | proc/mgt.c | 31 |
1 files changed, 31 insertions, 0 deletions
@@ -966,17 +966,46 @@ genpid () return nextpid++; } + + +/* Support for making sysvinit PID 1. */ + +/* We reserve PID 1 for sysvinit. However, proc may pick up the task + when it is created and reserve an entry in the process table for + it. When startup tells us the task that it created for sysvinit, + we need to locate this preliminary entry and remove it. Otherwise, + we end up with two entries for sysvinit with the same task. */ + +/* XXX: This is a mess. It would be nicer if startup gave us the + ports (e.g. sysvinit's task, the kernel task...) before starting + us, communicating the names using command line options. */ + /* Implement proc_set_init_task as described in <hurd/process.defs>. */ error_t S_proc_set_init_task(struct proc *callerp, task_t task) { + struct proc *shadow; + if (! callerp) return EOPNOTSUPP; if (callerp != startup_proc) return EPERM; + /* Check if TASK already made it into the process table, and if so + remove it. */ + shadow = task_find_nocreate (task); + if (shadow) + { + /* Cheat a little so we can use complete_exit. */ + shadow->p_dead = 1; + shadow->p_waited = 1; + mach_port_deallocate (mach_task_self (), shadow->p_task); + shadow->p_task = MACH_PORT_NULL; + complete_exit (shadow); + } + init_proc->p_task = task; proc_death_notify (init_proc); add_proc_to_hash (init_proc); @@ -984,6 +1013,8 @@ S_proc_set_init_task(struct proc *callerp, return 0; } + + /* Implement proc_mark_important as described in <hurd/process.defs>. */ kern_return_t S_proc_mark_important (struct proc *p) |