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/* Process server definitions
Copyright (C) 1992,93,94,95,96,99,2000,01,13
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 <hurd/ihash.h>
#include <pthread.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 */
hurd_ihash_locp_t p_pidhashloc; /* by pid */
hurd_ihash_locp_t 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;
/* Processes may live in a task namespace identified by the
notification port registered by proc_make_task_namespace. */
mach_port_t p_task_namespace; /* send right */
/* Communication */
mach_port_t p_msgport; /* send right */
pthread_cond_t p_wakeup;
/* Miscellaneous information */
char *exe; /* path to binary executable */
vm_address_t p_argv, p_envp;
vm_address_t start_code; /* all executable segments are in this range */
vm_address_t end_code;
vm_address_t p_entry; /* executable entry */
int p_status; /* to return via wait */
int p_sigcode;
struct rusage p_rusage; /* my usage if I'm dead, to return via wait */
struct rusage p_child_rusage; /* accumulates p_rusage of all dead children */
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 */
unsigned int p_important:1; /* has called proc_mark_important */
unsigned int p_continued:1; /* has called proc_mark_cont */
};
typedef struct proc *pstruct_t;
struct pgrp
{
hurd_ihash_locp_t 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
{
hurd_ihash_locp_t 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_refcnt;
int i_nuids;
uid_t i_uids[0];
};
/* 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];
};
extern mach_port_t authserver;
extern struct proc *self_proc; /* process HURD_PID_PROC (us) */
extern struct proc *init_proc; /* process 1 (sysvinit) */
extern struct proc *startup_proc; /* process 2 (hurd/startup) */
extern struct port_bucket *proc_bucket;
extern struct port_class *proc_class;
extern struct port_class *generic_port_class;
extern struct port_class *exc_class;
extern mach_port_t generic_port; /* messages not related to a specific proc */
extern struct proc *kernel_proc;
extern pthread_mutex_t global_lock;
extern int startup_fallback; /* (ab)use /hurd/startup's message port */
/* Forward declarations */
void complete_wait (struct proc *, int);
int check_uid (struct proc *, uid_t);
int check_owner (struct proc *, struct proc *);
void addalltasks (void);
void prociterate (void (*)(struct proc *, void *), void *);
void free_process (struct proc *);
void panic (char *);
int valid_task (task_t);
int genpid (void);
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_init_proc (void);
struct proc *allocate_proc (task_t);
void proc_death_notify (struct proc *);
void complete_proc (struct proc *, pid_t);
void leave_pgrp (struct proc *);
void join_pgrp (struct proc *);
void boot_setsid (struct proc *);
int namespace_is_subprocess (struct proc *p);
error_t namespace_translate_pids (mach_port_t namespace, pid_t *pids, size_t pids_len);
struct proc *namespace_find_root (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, int, mach_port_t);
#endif
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