diff options
Diffstat (limited to 'proc/proc.h')
| -rw-r--r-- | proc/proc.h | 222 |
1 files changed, 222 insertions, 0 deletions
diff --git a/proc/proc.h b/proc/proc.h new file mode 100644 index 00000000..0022b132 --- /dev/null +++ b/proc/proc.h @@ -0,0 +1,222 @@ +/* Process server definitions + Copyright (C) 1992,93,94,95,96,99,2000 Free Software Foundation, Inc. + +This file is part of the GNU Hurd. + +The GNU Hurd is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +The GNU Hurd is distributed in the hope that it will be useful, +but WITHOUT ANY WARRANTY; without even the implied warranty of +MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +GNU General Public License for more details. + +You should have received a copy of the GNU General Public License +along with the GNU Hurd; see the file COPYING. If not, write to +the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA. */ + +/* Written by Michael I. Bushnell. */ + +#ifndef PROC_H_INCLUDED +#define PROC_H_INCLUDED + +#include <sys/resource.h> +#include <sys/mman.h> +#include <hurd/ports.h> +#include <cthreads.h> + +struct proc +{ + struct port_info p_pi; + + /* List of members of a process group */ + struct proc *p_gnext, **p_gprevp; /* process group */ + + /* Hash table pointers that point here */ + void **p_pidhashloc; /* by pid */ + void **p_taskhashloc; /* by task port */ + + /* Identification of this process */ + task_t p_task; + pid_t p_pid; + struct login *p_login; + uid_t p_owner; + struct ids *p_id; + + /* Process hierarchy */ + /* Every process is in the process hierarchy except processes + 0 and 1. Processes which have not had proc_child called + on their behalf are parented by 1. */ + struct proc *p_parent; /* parent process */ + struct proc *p_ochild; /* youngest child */ + struct proc *p_sib, **p_prevsib; /* next youngest sibling */ + + /* Process group structure */ + struct pgrp *p_pgrp; + + /* Communication */ + mach_port_t p_msgport; /* send right */ + + struct condition p_wakeup; + + /* Miscellaneous information */ + vm_address_t p_argv, p_envp; + int p_status; /* to return via wait */ + int p_sigcode; + + unsigned int p_exec:1; /* has called proc_mark_exec */ + unsigned int p_stopped:1; /* has called proc_mark_stop */ + unsigned int p_waited:1; /* stop has been reported to parent */ + unsigned int p_exiting:1; /* has called proc_mark_exit */ + unsigned int p_waiting:1; /* blocked in wait */ + unsigned int p_traced:1; /* has called proc_mark_traced */ + unsigned int p_nostopcld:1; /* has called proc_mark_nostopchild */ + unsigned int p_parentset:1; /* has had a parent set with proc_child */ + unsigned int p_deadmsg:1; /* hang on requests for a message port */ + unsigned int p_checkmsghangs:1; /* someone is currently hanging on us */ + unsigned int p_msgportwait:1; /* blocked in getmsgport */ + unsigned int p_noowner:1; /* has no owner known */ + unsigned int p_loginleader:1; /* leader of login collection */ + unsigned int p_dead:1; /* process is dead */ +}; + +typedef struct proc *pstruct_t; + +struct pgrp +{ + void **pg_hashloc; + struct proc *pg_plist; /* member processes */ + struct pgrp *pg_next, **pg_prevp; /* list of pgrps in session */ + pid_t pg_pgid; + struct session *pg_session; + int pg_orphcnt; /* number of non-orphaned processes */ +}; + +struct session +{ + void **s_hashloc; + pid_t s_sid; + struct pgrp *s_pgrps; /* list of member pgrps */ + mach_port_t s_sessionid; /* receive right */ +}; + +struct login +{ + int l_refcnt; + char l_name[0]; +}; + +struct ids +{ + int i_nuids, i_ngids; + uid_t *i_uids; + gid_t *i_gids; + int i_refcnt; +}; + +/* Structure for an exception port we are listening on. */ +struct exc +{ + struct port_info pi; + mach_port_t forwardport; /* Send right to forward msg to. */ + int flavor; /* State to restore faulting thread to. */ + mach_msg_type_number_t statecnt; + natural_t thread_state[0]; +}; + +struct zombie *zombie_list; + +mach_port_t authserver; +struct proc *self_proc; /* process 0 (us) */ +struct proc *startup_proc; /* process 1 (init) */ + +struct port_bucket *proc_bucket; +struct port_class *proc_class; +struct port_class *generic_port_class; +struct port_class *exc_class; + +mach_port_t master_host_port; +mach_port_t master_device_port; + +mach_port_t generic_port; /* messages not related to a specific proc */ + +struct mutex global_lock; + +extern inline void +process_drop (struct proc *p) +{ + if (p) + ports_port_deref (p); +} + +/* Forward declarations */ +void complete_wait (struct proc *, int); +int check_uid (struct proc *, uid_t); +void addalltasks (void); +void prociterate (void (*)(struct proc *, void *), void *); +void count_up (void *); +void store_pid (void *); +void free_process (struct proc *); +void panic (char *); +int valid_task (task_t); +int genpid (); +void abort_getmsgport (struct proc *); +int zombie_check_pid (pid_t); +void check_message_dying (struct proc *, struct proc *); +int check_msgport_death (struct proc *); +void check_dead_execdata_notify (mach_port_t); + +void add_proc_to_hash (struct proc *); +void add_exc_to_hash (struct exc *); +void remove_proc_from_hash (struct proc *); +void add_pgrp_to_hash (struct pgrp *); +void add_session_to_hash (struct session *); +void remove_session_from_hash (struct session *); +void remove_pgrp_from_hash (struct pgrp *); +void remove_exc_from_hash (struct exc *); +struct exc *exc_find (mach_port_t); +struct proc *pid_find (int); +struct proc *pid_find_allow_zombie (int); +struct proc *task_find (task_t); +struct proc *task_find_nocreate (task_t); +struct pgrp *pgrp_find (int); +struct proc *reqport_find (mach_port_t); +struct session *session_find (pid_t); + +void exc_clean (void *); + +struct proc *add_tasks (task_t); +int pidfree (pid_t); + +struct proc *create_startup_proc (void); +struct proc *allocate_proc (task_t); +void complete_proc (struct proc *, pid_t); + +void leave_pgrp (struct proc *); +void join_pgrp (struct proc *); +void boot_setsid (struct proc *); + +void process_has_exited (struct proc *); +void alert_parent (struct proc *); +void reparent_zombies (struct proc *); +void complete_exit (struct proc *); + +void initialize_version_info (void); + +void send_signal (mach_port_t, int, mach_port_t); + +/* Returns true if PROC1 has `owner' privileges over PROC2 (and can thus get + its task port &c). If PROC2 has an owner, then PROC1 must have that uid; + otherwise, both must be in the same login collection. */ +extern inline int +check_owner (struct proc *proc1, struct proc *proc2) +{ + return + proc2->p_noowner + ? check_uid (proc1, 0) || proc1->p_login == proc2->p_login + : check_uid (proc1, proc2->p_owner); +} + +#endif |