[apple/xnu.git] / bsd / sys / proc.h

/*
 * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * The contents of this file constitute Original Code as defined in and
 * are subject to the Apple Public Source License Version 1.1 (the
 * "License").  You may not use this file except in compliance with the
 * License.  Please obtain a copy of the License at
 * http://www.apple.com/publicsource and read it before using this file.
 * 
 * This Original Code and all software distributed under the License are
 * distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
 * EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
 * INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT.  Please see the
 * License for the specific language governing rights and limitations
 * under the License.
 * 
 * @APPLE_LICENSE_HEADER_END@
 */
/* Copyright (c) 1995, 1997 Apple Computer, Inc. All Rights Reserved */
/*-
 * Copyright (c) 1986, 1989, 1991, 1993
 *	The Regents of the University of California.  All rights reserved.
 * (c) UNIX System Laboratories, Inc.
 * All or some portions of this file are derived from material licensed
 * to the University of California by American Telephone and Telegraph
 * Co. or Unix System Laboratories, Inc. and are reproduced herein with
 * the permission of UNIX System Laboratories, Inc.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 *
 *	@(#)proc.h	8.15 (Berkeley) 5/19/95
 */

#ifndef _SYS_PROC_H_
#define	_SYS_PROC_H_

#include <sys/appleapiopts.h>
#include <sys/cdefs.h>
#include <sys/select.h>			/* For struct selinfo. */
#include <sys/queue.h>
#include <sys/lock.h>
#include <sys/param.h>
#include <sys/event.h>

#ifdef __APPLE_API_PRIVATE

/*
 * One structure allocated per session.
 */
struct	session {
	int	s_count;		/* Ref cnt; pgrps in session. */
	struct	proc *s_leader;		/* Session leader. */
	struct	vnode *s_ttyvp;		/* Vnode of controlling terminal. */
	struct	tty *s_ttyp;		/* Controlling terminal. */
	pid_t	s_sid;		/* Session ID */
	char	s_login[MAXLOGNAME];	/* Setlogin() name. */
};

/*
 * One structure allocated per process group.
 */
struct	pgrp {
	LIST_ENTRY(pgrp) pg_hash;	/* Hash chain. */
	LIST_HEAD(, proc) pg_members;	/* Pointer to pgrp members. */
	struct	session *pg_session;	/* Pointer to session. */
	pid_t	pg_id;			/* Pgrp id. */
	int	pg_jobc;	/* # procs qualifying pgrp for job control */
};

/*
 * Description of a process.
 *
 * This structure contains the information needed to manage a thread of
 * control, known in UN*X as a process; it has references to substructures
 * containing descriptions of things that the process uses, but may share
 * with related processes.  The process structure and the substructures
 * are always addressible except for those marked "(PROC ONLY)" below,
 * which might be addressible only on a processor on which the process
 * is running.
 */
struct	proc {
	LIST_ENTRY(proc) p_list;	/* List of all processes. */

	/* substructures: */
	struct	pcred *p_cred;		/* Process owner's identity. */
	struct	filedesc *p_fd;		/* Ptr to open files structure. */
	struct	pstats *p_stats;	/* Accounting/statistics (PROC ONLY). */
	struct	plimit *p_limit;	/* Process limits. */
	struct	sigacts *p_sigacts;	/* Signal actions, state (PROC ONLY). */

#define	p_ucred		p_cred->pc_ucred
#define	p_rlimit	p_limit->pl_rlimit

	int	p_flag;			/* P_* flags. */
	char	p_stat;			/* S* process status. */
        char	p_shutdownstate;
	char	p_pad1[2];

	pid_t	p_pid;			/* Process identifier. */
	LIST_ENTRY(proc) p_pglist;	/* List of processes in pgrp. */
	struct	proc *p_pptr;	 	/* Pointer to parent process. */
	LIST_ENTRY(proc) p_sibling;	/* List of sibling processes. */
	LIST_HEAD(, proc) p_children;	/* Pointer to list of children. */

/* The following fields are all zeroed upon creation in fork. */
#define	p_startzero	p_oppid

	pid_t	p_oppid;	 /* Save parent pid during ptrace. XXX */
	int	p_dupfd;	 /* Sideways return value from fdopen. XXX */

	/* scheduling */
	u_int	p_estcpu;	 /* Time averaged value of p_cpticks. */
	int	p_cpticks;	 /* Ticks of cpu time. */
	fixpt_t	p_pctcpu;	 /* %cpu for this process during p_swtime */
	void	*p_wchan;	 /* Sleep address. */
	char	*p_wmesg;	 /* Reason for sleep. */
	u_int	p_swtime;	 /* DEPRECATED (Time swapped in or out.) */
#define	p_argslen p_swtime	 /* Length of process arguments. */
	u_int	p_slptime;	 /* Time since last blocked. */

	struct	itimerval p_realtimer;	/* Alarm timer. */
	struct	timeval p_rtime;	/* Real time. */
	u_quad_t p_uticks;		/* Statclock hits in user mode. */
	u_quad_t p_sticks;		/* Statclock hits in system mode. */
	u_quad_t p_iticks;		/* Statclock hits processing intr. */

	int	p_traceflag;		/* Kernel trace points. */
	struct	vnode *p_tracep;	/* Trace to vnode. */

	sigset_t p_siglist;		/* DEPRECATED. */

	struct	vnode *p_textvp;	/* Vnode of executable. */

/* End area that is zeroed on creation. */
#define	p_endzero	p_hash.le_next

	/*
	 * Not copied, not zero'ed.
	 * Belongs after p_pid, but here to avoid shifting proc elements.
	 */
	LIST_ENTRY(proc) p_hash;	/* Hash chain. */
	TAILQ_HEAD( ,eventqelt) p_evlist;

/* The following fields are all copied upon creation in fork. */
#define	p_startcopy	p_sigmask

	sigset_t p_sigmask;		/* DEPRECATED */
	sigset_t p_sigignore;	/* Signals being ignored. */
	sigset_t p_sigcatch;	/* Signals being caught by user. */

	u_char	p_priority;	/* Process priority. */
	u_char	p_usrpri;	/* User-priority based on p_cpu and p_nice. */
	char	p_nice;		/* Process "nice" value. */
	char	p_comm[MAXCOMLEN+1];

	struct 	pgrp *p_pgrp;	/* Pointer to process group. */

/* End area that is copied on creation. */
#define	p_endcopy	p_xstat
	
	u_short	p_xstat;	/* Exit status for wait; also stop signal. */
	u_short	p_acflag;	/* Accounting flags. */
	struct	rusage *p_ru;	/* Exit information. XXX */

	int	p_debugger;	/* 1: can exec set-bit programs if suser */

	void	*task;			/* corresponding task */
	void	*sigwait_thread;	/* 'thread' holding sigwait */
	struct lock__bsd__ signal_lock;	/* multilple thread prot for signals*/
	boolean_t	 sigwait;	/* indication to suspend */
	void	*exit_thread;		/* Which thread is exiting? */
	caddr_t	user_stack;		/* where user stack was allocated */
	void * exitarg;			/* exit arg for proc terminate */
	void * vm_shm;			/* for sysV shared memory */
	int  p_argc;			/* saved argc for sysctl_procargs() */
	int		p_vforkcnt;		/* number of outstanding vforks */
    void *  p_vforkact;     /* activation running this vfork proc */
	TAILQ_HEAD( , uthread) p_uthlist; /* List of uthreads  */
	/* Following fields are info from SIGCHLD */
	pid_t	si_pid;
	u_short si_status;
	u_short	si_code;
	uid_t	si_uid;
	TAILQ_HEAD( , aio_workq_entry ) aio_activeq; /* active async IO requests */
	int		aio_active_count;	/* entries on aio_activeq */
	TAILQ_HEAD( , aio_workq_entry ) aio_doneq;	 /* completed async IO requests */
	int		aio_done_count;		/* entries on aio_doneq */

	struct klist p_klist;  /* knote list */
	struct  auditinfo		*p_au;	/* User auditing data */
#if DIAGNOSTIC
#if SIGNAL_DEBUG
	unsigned int lockpc[8];
	unsigned int unlockpc[8];
#endif /* SIGNAL_DEBUG */
#endif /* DIAGNOSTIC */
};

#else /* !__APPLE_API_PRIVATE */
struct session;
struct pgrp;
struct proc;
#endif /* !__APPLE_API_PRIVATE */

#ifdef __APPLE_API_UNSTABLE
/* Exported fields for kern sysctls */
struct extern_proc {
	union {
		struct {
			struct	proc *__p_forw;	/* Doubly-linked run/sleep queue. */
			struct	proc *__p_back;
		} p_st1;
		struct timeval __p_starttime; 	/* process start time */
	} p_un;
#define p_forw p_un.p_st1.__p_forw
#define p_back p_un.p_st1.__p_back
#define p_starttime p_un.__p_starttime
	struct	vmspace *p_vmspace;	/* Address space. */
	struct	sigacts *p_sigacts;	/* Signal actions, state (PROC ONLY). */
	int	p_flag;			/* P_* flags. */
	char	p_stat;			/* S* process status. */
	pid_t	p_pid;			/* Process identifier. */
	pid_t	p_oppid;	 /* Save parent pid during ptrace. XXX */
	int	p_dupfd;	 /* Sideways return value from fdopen. XXX */
	/* Mach related  */
	caddr_t user_stack;	/* where user stack was allocated */
	void	*exit_thread;	/* XXX Which thread is exiting? */
	int		p_debugger;		/* allow to debug */
	boolean_t	sigwait;	/* indication to suspend */
	/* scheduling */
	u_int	p_estcpu;	 /* Time averaged value of p_cpticks. */
	int	p_cpticks;	 /* Ticks of cpu time. */
	fixpt_t	p_pctcpu;	 /* %cpu for this process during p_swtime */
	void	*p_wchan;	 /* Sleep address. */
	char	*p_wmesg;	 /* Reason for sleep. */
	u_int	p_swtime;	 /* Time swapped in or out. */
	u_int	p_slptime;	 /* Time since last blocked. */
	struct	itimerval p_realtimer;	/* Alarm timer. */
	struct	timeval p_rtime;	/* Real time. */
	u_quad_t p_uticks;		/* Statclock hits in user mode. */
	u_quad_t p_sticks;		/* Statclock hits in system mode. */
	u_quad_t p_iticks;		/* Statclock hits processing intr. */
	int	p_traceflag;		/* Kernel trace points. */
	struct	vnode *p_tracep;	/* Trace to vnode. */
	int	p_siglist;		/* DEPRECATED */
	struct	vnode *p_textvp;	/* Vnode of executable. */
	int	p_holdcnt;		/* If non-zero, don't swap. */
	sigset_t p_sigmask;	/* DEPRECATED. */
	sigset_t p_sigignore;	/* Signals being ignored. */
	sigset_t p_sigcatch;	/* Signals being caught by user. */
	u_char	p_priority;	/* Process priority. */
	u_char	p_usrpri;	/* User-priority based on p_cpu and p_nice. */
	char	p_nice;		/* Process "nice" value. */
	char	p_comm[MAXCOMLEN+1];
	struct 	pgrp *p_pgrp;	/* Pointer to process group. */
	struct	user *p_addr;	/* Kernel virtual addr of u-area (PROC ONLY). */
	u_short	p_xstat;	/* Exit status for wait; also stop signal. */
	u_short	p_acflag;	/* Accounting flags. */
	struct	rusage *p_ru;	/* Exit information. XXX */
};

#define	p_session	p_pgrp->pg_session
#define	p_pgid		p_pgrp->pg_id

/* Status values. */
#define	SIDL	1		/* Process being created by fork. */
#define	SRUN	2		/* Currently runnable. */
#define	SSLEEP	3		/* Sleeping on an address. */
#define	SSTOP	4		/* Process debugging or suspension. */
#define	SZOMB	5		/* Awaiting collection by parent. */

/* These flags are kept in p_flags. */
#define	P_ADVLOCK	0x00001	/* Process may hold a POSIX advisory lock. */
#define	P_CONTROLT	0x00002	/* Has a controlling terminal. */
#define	P_INMEM		0x00004	/* Loaded into memory. */
#define	P_NOCLDSTOP	0x00008	/* No SIGCHLD when children stop. */
#define	P_PPWAIT	0x00010	/* Parent is waiting for child to exec/exit. */
#define	P_PROFIL	0x00020	/* Has started profiling. */
#define	P_SELECT	0x00040	/* Selecting; wakeup/waiting danger. */
#define	P_SINTR		0x00080	/* Sleep is interruptible. */
#define	P_SUGID		0x00100	/* Had set id privileges since last exec. */
#define	P_SYSTEM	0x00200	/* System proc: no sigs, stats or swapping. */
#define	P_TIMEOUT	0x00400	/* Timing out during sleep. */
#define	P_TRACED	0x00800	/* Debugged process being traced. */
#define	P_WAITED	0x01000	/* Debugging process has waited for child. */
#define	P_WEXIT		0x02000	/* Working on exiting. */
#define	P_EXEC		0x04000	/* Process called exec. */

/* Should be moved to machine-dependent areas. */
#define	P_OWEUPC	0x08000	/* Owe process an addupc() call at next ast. */

#define	P_AFFINITY	0x0010000	/* xxx */
#define	P_CLASSIC	0x0020000	/* xxx */
/*
#define	P_FSTRACE	  0x10000	/ * tracing via file system (elsewhere?) * /
#define	P_SSTEP		  0x20000	/ * process needs single-step fixup ??? * /
*/

#define	P_WAITING	0x0040000	/* process has a wait() in progress */
#define	P_KDEBUG	0x0080000	/* kdebug tracing is on for this process */
#define	P_TTYSLEEP	0x0100000	/* blocked due to SIGTTOU or SIGTTIN */
#define	P_REBOOT	0x0200000	/* Process called reboot() */
#define	P_TBE		0x0400000	/* Process is TBE */
#define	P_SIGEXC	0x0800000	/* signal exceptions */
#define	P_BTRACE	0x1000000	/* process is being branch traced */
#define	P_VFORK		0x2000000	/* process has vfork children */
#define	P_NOATTACH	0x4000000
#define	P_INVFORK	0x8000000	/* proc in vfork */
#define	P_NOSHLIB	0x10000000	/* no shared libs are in use for proc */
					/* flag set on exec */
#define	P_FORCEQUOTA	0x20000000	/* Force quota for root */
#define	P_NOCLDWAIT	0x40000000	/* No zombies when chil procs exit */
#define	P_NOREMOTEHANG	0x80000000	/* Don't hang on remote FS ops */

#define	P_NOSWAP	0		/* Obsolete: retained so that nothing breaks */
#define	P_PHYSIO	0		/* Obsolete: retained so that nothing breaks */
#define	P_FSTRACE	0		/* Obsolete: retained so that nothing breaks */
#define	P_SSTEP		0		/* Obsolete: retained so that nothing breaks */

/*
 * Shareable process credentials (always resident).  This includes a reference
 * to the current user credentials as well as real and saved ids that may be
 * used to change ids.
 */
struct	pcred {
	struct	lock__bsd__ pc_lock;
	struct	ucred *pc_ucred;	/* Current credentials. */
	uid_t	p_ruid;			/* Real user id. */
	uid_t	p_svuid;		/* Saved effective user id. */
	gid_t	p_rgid;			/* Real group id. */
	gid_t	p_svgid;		/* Saved effective group id. */
	int	p_refcnt;		/* Number of references. */
};

#define pcred_readlock(p)	lockmgr(&(p)->p_cred->pc_lock,		\
						LK_SHARED, 0, (p))
#define pcred_writelock(p)	lockmgr(&(p)->p_cred->pc_lock,		\
						LK_EXCLUSIVE, 0, (p))
#define pcred_unlock(p)		lockmgr(&(p)->p_cred->pc_lock,		\
						LK_RELEASE, 0, (p))
#endif /* __APPLE_API_UNSTABLE */

#ifdef KERNEL

__BEGIN_DECLS
#ifdef __APPLE_API_PRIVATE
/*
 * We use process IDs <= PID_MAX; PID_MAX + 1 must also fit in a pid_t,
 * as it is used to represent "no process group".
 */
extern int nprocs, maxproc;		/* Current and max number of procs. */
__private_extern__ int hard_maxproc;	/* hard limit */

#define	PID_MAX		30000
#define	NO_PID		30001

#define SESS_LEADER(p)	((p)->p_session->s_leader == (p))
#define	SESSHOLD(s)	((s)->s_count++)
#define	SESSRELE(s)	sessrele(s)

#define	PIDHASH(pid)	(&pidhashtbl[(pid) & pidhash])
extern LIST_HEAD(pidhashhead, proc) *pidhashtbl;
extern u_long pidhash;

#define	PGRPHASH(pgid)	(&pgrphashtbl[(pgid) & pgrphash])
extern LIST_HEAD(pgrphashhead, pgrp) *pgrphashtbl;
extern u_long pgrphash;

LIST_HEAD(proclist, proc);
extern struct proclist allproc;		/* List of all processes. */
extern struct proclist zombproc;	/* List of zombie processes. */
extern struct proc *initproc, *kernproc;
extern void	pgdelete __P((struct pgrp *pgrp));
extern void	sessrele __P((struct session *sess));
extern void	procinit __P((void));
__private_extern__ char *proc_core_name(const char *name, uid_t uid, pid_t pid);
extern int proc_is_classic(struct proc *p);
struct proc *current_proc_EXTERNAL(void);
#endif /* __APPLE_API_PRIVATE */

#ifdef __APPLE_API_UNSTABLE

extern int isinferior(struct proc *, struct proc *);
extern struct	proc *pfind __P((pid_t));	/* Find process by id. */
__private_extern__ struct proc *pzfind(pid_t);	/* Find zombie by id. */
extern struct	pgrp *pgfind __P((pid_t));	/* Find process group by id. */

extern int	chgproccnt __P((uid_t uid, int diff));
extern int	enterpgrp __P((struct proc *p, pid_t pgid, int mksess));
extern void	fixjobc __P((struct proc *p, struct pgrp *pgrp, int entering));
extern int	inferior __P((struct proc *p));
extern int	leavepgrp __P((struct proc *p));
#ifdef __APPLE_API_OBSOLETE
extern void	mi_switch __P((void));
#endif /* __APPLE_API_OBSOLETE */
extern void	resetpriority __P((struct proc *));
extern void	setrunnable __P((struct proc *));
extern void	setrunqueue __P((struct proc *));
extern int	sleep __P((void *chan, int pri));
extern int	tsleep __P((void *chan, int pri, char *wmesg, int timo));
extern int	tsleep0 __P((void *chan, int pri, char *wmesg, int timo, int (*continuation)(int)));
extern int	tsleep1 __P((void *chan, int pri, char *wmesg, u_int64_t abstime, int (*continuation)(int)));
extern void	unsleep __P((struct proc *));
extern void	wakeup __P((void *chan));
#endif /* __APPLE_API_UNSTABLE */

__END_DECLS

#ifdef __APPLE_API_OBSOLETE
/* FreeBSD source compatibility macro */ 
#define PRISON_CHECK(p1, p2)	(1)
#endif /* __APPLE_API_OBSOLETE */

#endif	/* KERNEL */

#endif	/* !_SYS_PROC_H_ */
Commit	Line	Data
1c79356b	1	/*
e5568f75	2	* Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
1c79356b A	3	*
	4	* @APPLE_LICENSE_HEADER_START@
	5	*
e5568f75 A	6	* The contents of this file constitute Original Code as defined in and
	7	* are subject to the Apple Public Source License Version 1.1 (the
	8	* "License"). You may not use this file except in compliance with the
	9	* License. Please obtain a copy of the License at
	10	* http://www.apple.com/publicsource and read it before using this file.
1c79356b	11	*
e5568f75 A	12	* This Original Code and all software distributed under the License are
e5568f75 A	13	* distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, EITHER
1c79356b A	14	* EXPRESS OR IMPLIED, AND APPLE HEREBY DISCLAIMS ALL SUCH WARRANTIES,
1c79356b A	15	* INCLUDING WITHOUT LIMITATION, ANY WARRANTIES OF MERCHANTABILITY,
e5568f75 A	16	* FITNESS FOR A PARTICULAR PURPOSE OR NON-INFRINGEMENT. Please see the
	17	* License for the specific language governing rights and limitations
	18	* under the License.
1c79356b A	19	*
	20	* @APPLE_LICENSE_HEADER_END@
	21	*/
	22	/* Copyright (c) 1995, 1997 Apple Computer, Inc. All Rights Reserved */
	23	/*-
	24	* Copyright (c) 1986, 1989, 1991, 1993
	25	* The Regents of the University of California. All rights reserved.
	26	* (c) UNIX System Laboratories, Inc.
	27	* All or some portions of this file are derived from material licensed
	28	* to the University of California by American Telephone and Telegraph
	29	* Co. or Unix System Laboratories, Inc. and are reproduced herein with
	30	* the permission of UNIX System Laboratories, Inc.
	31	*
	32	* Redistribution and use in source and binary forms, with or without
	33	* modification, are permitted provided that the following conditions
	34	* are met:
	35	* 1. Redistributions of source code must retain the above copyright
	36	* notice, this list of conditions and the following disclaimer.
	37	* 2. Redistributions in binary form must reproduce the above copyright
	38	* notice, this list of conditions and the following disclaimer in the
	39	* documentation and/or other materials provided with the distribution.
	40	* 3. All advertising materials mentioning features or use of this software
	41	* must display the following acknowledgement:
	42	* This product includes software developed by the University of
	43	* California, Berkeley and its contributors.
	44	* 4. Neither the name of the University nor the names of its contributors
	45	* may be used to endorse or promote products derived from this software
	46	* without specific prior written permission.
	47	*
	48	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	49	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	50	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	51	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	52	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	53	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	54	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	55	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	56	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	57	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	58	* SUCH DAMAGE.
	59	*
	60	* @(#)proc.h 8.15 (Berkeley) 5/19/95
	61	*/
	62
	63	#ifndef _SYS_PROC_H_
	64	#define _SYS_PROC_H_
	65
9bccf70c	66	#include <sys/appleapiopts.h>
1c79356b	67	#include <sys/cdefs.h>
1c79356b A	68	#include <sys/select.h> /* For struct selinfo. */
	69	#include <sys/queue.h>
	70	#include <sys/lock.h>
	71	#include <sys/param.h>
55e303ae	72	#include <sys/event.h>
1c79356b	73
9bccf70c A	74	#ifdef __APPLE_API_PRIVATE
9bccf70c A	75
1c79356b A	76	/*
	77	* One structure allocated per session.
	78	*/
	79	struct session {
	80	int s_count; /* Ref cnt; pgrps in session. */
	81	struct proc s_leader; / Session leader. */
	82	struct vnode s_ttyvp; / Vnode of controlling terminal. */
	83	struct tty s_ttyp; / Controlling terminal. */
9bccf70c	84	pid_t s_sid; /* Session ID */
1c79356b A	85	char s_login[MAXLOGNAME]; /* Setlogin() name. */
	86	};
	87
	88	/*
	89	* One structure allocated per process group.
	90	*/
	91	struct pgrp {
	92	LIST_ENTRY(pgrp) pg_hash; /* Hash chain. */
	93	LIST_HEAD(, proc) pg_members; /* Pointer to pgrp members. */
	94	struct session pg_session; / Pointer to session. */
	95	pid_t pg_id; /* Pgrp id. */
	96	int pg_jobc; /* # procs qualifying pgrp for job control */
	97	};
	98
	99	/*
	100	* Description of a process.
	101	*
	102	* This structure contains the information needed to manage a thread of
	103	* control, known in UN*X as a process; it has references to substructures
	104	* containing descriptions of things that the process uses, but may share
	105	* with related processes. The process structure and the substructures
	106	* are always addressible except for those marked "(PROC ONLY)" below,
	107	* which might be addressible only on a processor on which the process
	108	* is running.
	109	*/
	110	struct proc {
	111	LIST_ENTRY(proc) p_list; /* List of all processes. */
	112
	113	/* substructures: */
	114	struct pcred p_cred; / Process owner's identity. */
	115	struct filedesc p_fd; / Ptr to open files structure. */
	116	struct pstats p_stats; / Accounting/statistics (PROC ONLY). */
	117	struct plimit p_limit; / Process limits. */
	118	struct sigacts p_sigacts; / Signal actions, state (PROC ONLY). */
	119
	120	#define p_ucred p_cred->pc_ucred
	121	#define p_rlimit p_limit->pl_rlimit
	122
	123	int p_flag; /* P_* flags. */
	124	char p_stat; /* S* process status. */
4a249263 A	125	char p_shutdownstate;
4a249263 A	126	char p_pad1[2];
1c79356b A	127
	128	pid_t p_pid; /* Process identifier. */
	129	LIST_ENTRY(proc) p_pglist; /* List of processes in pgrp. */
	130	struct proc p_pptr; / Pointer to parent process. */
	131	LIST_ENTRY(proc) p_sibling; /* List of sibling processes. */
	132	LIST_HEAD(, proc) p_children; /* Pointer to list of children. */
	133
	134	/* The following fields are all zeroed upon creation in fork. */
	135	#define p_startzero p_oppid
	136
	137	pid_t p_oppid; /* Save parent pid during ptrace. XXX */
	138	int p_dupfd; /* Sideways return value from fdopen. XXX */
	139
	140	/* scheduling */
	141	u_int p_estcpu; /* Time averaged value of p_cpticks. */
	142	int p_cpticks; /* Ticks of cpu time. */
	143	fixpt_t p_pctcpu; /* %cpu for this process during p_swtime */
	144	void p_wchan; / Sleep address. */
	145	char p_wmesg; / Reason for sleep. */
55e303ae A	146	u_int p_swtime; /* DEPRECATED (Time swapped in or out.) */
55e303ae A	147	#define p_argslen p_swtime /* Length of process arguments. */
1c79356b A	148	u_int p_slptime; /* Time since last blocked. */
	149
	150	struct itimerval p_realtimer; /* Alarm timer. */
	151	struct timeval p_rtime; /* Real time. */
	152	u_quad_t p_uticks; /* Statclock hits in user mode. */
	153	u_quad_t p_sticks; /* Statclock hits in system mode. */
	154	u_quad_t p_iticks; /* Statclock hits processing intr. */
	155
	156	int p_traceflag; /* Kernel trace points. */
	157	struct vnode p_tracep; / Trace to vnode. */
	158
9bccf70c	159	sigset_t p_siglist; /* DEPRECATED. */
1c79356b A	160
	161	struct vnode p_textvp; / Vnode of executable. */
	162
	163	/* End area that is zeroed on creation. */
	164	#define p_endzero p_hash.le_next
	165
	166	/*
	167	* Not copied, not zero'ed.
	168	* Belongs after p_pid, but here to avoid shifting proc elements.
	169	*/
	170	LIST_ENTRY(proc) p_hash; /* Hash chain. */
55e303ae	171	TAILQ_HEAD( ,eventqelt) p_evlist;
1c79356b A	172
	173	/* The following fields are all copied upon creation in fork. */
	174	#define p_startcopy p_sigmask
	175
9bccf70c	176	sigset_t p_sigmask; /* DEPRECATED */
1c79356b A	177	sigset_t p_sigignore; /* Signals being ignored. */
	178	sigset_t p_sigcatch; /* Signals being caught by user. */
	179
	180	u_char p_priority; /* Process priority. */
	181	u_char p_usrpri; /* User-priority based on p_cpu and p_nice. */
	182	char p_nice; /* Process "nice" value. */
	183	char p_comm[MAXCOMLEN+1];
	184
	185	struct pgrp p_pgrp; / Pointer to process group. */
	186
	187	/* End area that is copied on creation. */
	188	#define p_endcopy p_xstat
	189
	190	u_short p_xstat; /* Exit status for wait; also stop signal. */
	191	u_short p_acflag; /* Accounting flags. */
	192	struct rusage p_ru; / Exit information. XXX */
	193
	194	int p_debugger; /* 1: can exec set-bit programs if suser */
	195
	196	void task; / corresponding task */
	197	void sigwait_thread; / 'thread' holding sigwait */
	198	struct lock__bsd__ signal_lock; /* multilple thread prot for signals*/
	199	boolean_t sigwait; /* indication to suspend */
	200	void exit_thread; / Which thread is exiting? */
	201	caddr_t user_stack; /* where user stack was allocated */
	202	void * exitarg; /* exit arg for proc terminate */
	203	void * vm_shm; /* for sysV shared memory */
55e303ae	204	int p_argc; /* saved argc for sysctl_procargs() */
0b4e3aa0 A	205	int p_vforkcnt; /* number of outstanding vforks */
0b4e3aa0 A	206	void * p_vforkact; /* activation running this vfork proc */
9bccf70c A	207	TAILQ_HEAD( , uthread) p_uthlist; /* List of uthreads */
	208	/* Following fields are info from SIGCHLD */
	209	pid_t si_pid;
	210	u_short si_status;
	211	u_short si_code;
	212	uid_t si_uid;
55e303ae A	213	TAILQ_HEAD( , aio_workq_entry ) aio_activeq; /* active async IO requests */
	214	int aio_active_count; /* entries on aio_activeq */
	215	TAILQ_HEAD( , aio_workq_entry ) aio_doneq; /* completed async IO requests */
	216	int aio_done_count; /* entries on aio_doneq */
	217
	218	struct klist p_klist; /* knote list */
	219	struct auditinfo p_au; / User auditing data */
1c79356b A	220	#if DIAGNOSTIC
	221	#if SIGNAL_DEBUG
	222	unsigned int lockpc[8];
	223	unsigned int unlockpc[8];
	224	#endif /* SIGNAL_DEBUG */
	225	#endif /* DIAGNOSTIC */
	226	};
	227
55e303ae	228	#else /* !__APPLE_API_PRIVATE */
9bccf70c A	229	struct session;
	230	struct pgrp;
	231	struct proc;
55e303ae	232	#endif /* !__APPLE_API_PRIVATE */
9bccf70c A	233
9bccf70c A	234	#ifdef __APPLE_API_UNSTABLE
1c79356b A	235	/* Exported fields for kern sysctls */
1c79356b A	236	struct extern_proc {
9bccf70c A	237	union {
	238	struct {
	239	struct proc __p_forw; / Doubly-linked run/sleep queue. */
	240	struct proc *__p_back;
	241	} p_st1;
	242	struct timeval __p_starttime; /* process start time */
	243	} p_un;
	244	#define p_forw p_un.p_st1.__p_forw
	245	#define p_back p_un.p_st1.__p_back
	246	#define p_starttime p_un.__p_starttime
1c79356b A	247	struct vmspace p_vmspace; / Address space. */
	248	struct sigacts p_sigacts; / Signal actions, state (PROC ONLY). */
	249	int p_flag; /* P_* flags. */
	250	char p_stat; /* S* process status. */
	251	pid_t p_pid; /* Process identifier. */
	252	pid_t p_oppid; /* Save parent pid during ptrace. XXX */
	253	int p_dupfd; /* Sideways return value from fdopen. XXX */
	254	/* Mach related */
	255	caddr_t user_stack; /* where user stack was allocated */
	256	void exit_thread; / XXX Which thread is exiting? */
	257	int p_debugger; /* allow to debug */
	258	boolean_t sigwait; /* indication to suspend */
	259	/* scheduling */
	260	u_int p_estcpu; /* Time averaged value of p_cpticks. */
	261	int p_cpticks; /* Ticks of cpu time. */
	262	fixpt_t p_pctcpu; /* %cpu for this process during p_swtime */
	263	void p_wchan; / Sleep address. */
	264	char p_wmesg; / Reason for sleep. */
	265	u_int p_swtime; /* Time swapped in or out. */
	266	u_int p_slptime; /* Time since last blocked. */
	267	struct itimerval p_realtimer; /* Alarm timer. */
	268	struct timeval p_rtime; /* Real time. */
	269	u_quad_t p_uticks; /* Statclock hits in user mode. */
	270	u_quad_t p_sticks; /* Statclock hits in system mode. */
	271	u_quad_t p_iticks; /* Statclock hits processing intr. */
	272	int p_traceflag; /* Kernel trace points. */
	273	struct vnode p_tracep; / Trace to vnode. */
9bccf70c	274	int p_siglist; /* DEPRECATED */
1c79356b A	275	struct vnode p_textvp; / Vnode of executable. */
1c79356b A	276	int p_holdcnt; /* If non-zero, don't swap. */
9bccf70c	277	sigset_t p_sigmask; /* DEPRECATED. */
1c79356b A	278	sigset_t p_sigignore; /* Signals being ignored. */
	279	sigset_t p_sigcatch; /* Signals being caught by user. */
	280	u_char p_priority; /* Process priority. */
	281	u_char p_usrpri; /* User-priority based on p_cpu and p_nice. */
	282	char p_nice; /* Process "nice" value. */
	283	char p_comm[MAXCOMLEN+1];
	284	struct pgrp p_pgrp; / Pointer to process group. */
	285	struct user p_addr; / Kernel virtual addr of u-area (PROC ONLY). */
	286	u_short p_xstat; /* Exit status for wait; also stop signal. */
	287	u_short p_acflag; /* Accounting flags. */
	288	struct rusage p_ru; / Exit information. XXX */
	289	};
	290
	291	#define p_session p_pgrp->pg_session
	292	#define p_pgid p_pgrp->pg_id
	293
	294	/* Status values. */
	295	#define SIDL 1 /* Process being created by fork. */
	296	#define SRUN 2 /* Currently runnable. */
	297	#define SSLEEP 3 /* Sleeping on an address. */
	298	#define SSTOP 4 /* Process debugging or suspension. */
	299	#define SZOMB 5 /* Awaiting collection by parent. */
	300
	301	/* These flags are kept in p_flags. */
	302	#define P_ADVLOCK 0x00001 /* Process may hold a POSIX advisory lock. */
	303	#define P_CONTROLT 0x00002 /* Has a controlling terminal. */
	304	#define P_INMEM 0x00004 /* Loaded into memory. */
	305	#define P_NOCLDSTOP 0x00008 /* No SIGCHLD when children stop. */
	306	#define P_PPWAIT 0x00010 /* Parent is waiting for child to exec/exit. */
	307	#define P_PROFIL 0x00020 /* Has started profiling. */
	308	#define P_SELECT 0x00040 /* Selecting; wakeup/waiting danger. */
	309	#define P_SINTR 0x00080 /* Sleep is interruptible. */
	310	#define P_SUGID 0x00100 /* Had set id privileges since last exec. */
	311	#define P_SYSTEM 0x00200 /* System proc: no sigs, stats or swapping. */
	312	#define P_TIMEOUT 0x00400 /* Timing out during sleep. */
	313	#define P_TRACED 0x00800 /* Debugged process being traced. */
	314	#define P_WAITED 0x01000 /* Debugging process has waited for child. */
	315	#define P_WEXIT 0x02000 /* Working on exiting. */
	316	#define P_EXEC 0x04000 /* Process called exec. */
	317
1c79356b A	318	/* Should be moved to machine-dependent areas. */
	319	#define P_OWEUPC 0x08000 /* Owe process an addupc() call at next ast. */
	320
55e303ae A	321	#define P_AFFINITY 0x0010000 /* xxx */
	322	#define P_CLASSIC 0x0020000 /* xxx */
	323	/*
	324	#define P_FSTRACE 0x10000 / * tracing via file system (elsewhere?) * /
	325	#define P_SSTEP 0x20000 / * process needs single-step fixup ??? * /
	326	*/
1c79356b A	327
	328	#define P_WAITING 0x0040000 /* process has a wait() in progress */
	329	#define P_KDEBUG 0x0080000 /* kdebug tracing is on for this process */
	330	#define P_TTYSLEEP 0x0100000 /* blocked due to SIGTTOU or SIGTTIN */
	331	#define P_REBOOT 0x0200000 /* Process called reboot() */
	332	#define P_TBE 0x0400000 /* Process is TBE */
9bccf70c	333	#define P_SIGEXC 0x0800000 /* signal exceptions */
0b4e3aa0 A	334	#define P_BTRACE 0x1000000 /* process is being branch traced */
0b4e3aa0 A	335	#define P_VFORK 0x2000000 /* process has vfork children */
9bccf70c	336	#define P_NOATTACH 0x4000000
0b4e3aa0	337	#define P_INVFORK 0x8000000 /* proc in vfork */
9bccf70c A	338	#define P_NOSHLIB 0x10000000 /* no shared libs are in use for proc */
	339	/* flag set on exec */
	340	#define P_FORCEQUOTA 0x20000000 /* Force quota for root */
	341	#define P_NOCLDWAIT 0x40000000 /* No zombies when chil procs exit */
55e303ae	342	#define P_NOREMOTEHANG 0x80000000 /* Don't hang on remote FS ops */
0b4e3aa0	343
9bccf70c	344	#define P_NOSWAP 0 /* Obsolete: retained so that nothing breaks */
55e303ae A	345	#define P_PHYSIO 0 /* Obsolete: retained so that nothing breaks */
	346	#define P_FSTRACE 0 /* Obsolete: retained so that nothing breaks */
	347	#define P_SSTEP 0 /* Obsolete: retained so that nothing breaks */
1c79356b A	348
	349	/*
	350	* Shareable process credentials (always resident). This includes a reference
	351	* to the current user credentials as well as real and saved ids that may be
	352	* used to change ids.
	353	*/
	354	struct pcred {
	355	struct lock__bsd__ pc_lock;
	356	struct ucred pc_ucred; / Current credentials. */
	357	uid_t p_ruid; /* Real user id. */
	358	uid_t p_svuid; /* Saved effective user id. */
	359	gid_t p_rgid; /* Real group id. */
	360	gid_t p_svgid; /* Saved effective group id. */
	361	int p_refcnt; /* Number of references. */
	362	};
	363
	364	#define pcred_readlock(p) lockmgr(&(p)->p_cred->pc_lock, \
	365	LK_SHARED, 0, (p))
	366	#define pcred_writelock(p) lockmgr(&(p)->p_cred->pc_lock, \
	367	LK_EXCLUSIVE, 0, (p))
	368	#define pcred_unlock(p) lockmgr(&(p)->p_cred->pc_lock, \
	369	LK_RELEASE, 0, (p))
9bccf70c	370	#endif /* __APPLE_API_UNSTABLE */
1c79356b A	371
	372	#ifdef KERNEL
	373
	374	__BEGIN_DECLS
9bccf70c	375	#ifdef __APPLE_API_PRIVATE
1c79356b A	376	/*
	377	* We use process IDs <= PID_MAX; PID_MAX + 1 must also fit in a pid_t,
	378	* as it is used to represent "no process group".
	379	*/
9bccf70c	380	extern int nprocs, maxproc; /* Current and max number of procs. */
55e303ae	381	__private_extern__ int hard_maxproc; /* hard limit */
9bccf70c	382
1c79356b A	383	#define PID_MAX 30000
	384	#define NO_PID 30001
	385
	386	#define SESS_LEADER(p) ((p)->p_session->s_leader == (p))
	387	#define SESSHOLD(s) ((s)->s_count++)
	388	#define SESSRELE(s) sessrele(s)
	389
	390	#define PIDHASH(pid) (&pidhashtbl[(pid) & pidhash])
	391	extern LIST_HEAD(pidhashhead, proc) *pidhashtbl;
	392	extern u_long pidhash;
	393
	394	#define PGRPHASH(pgid) (&pgrphashtbl[(pgid) & pgrphash])
	395	extern LIST_HEAD(pgrphashhead, pgrp) *pgrphashtbl;
	396	extern u_long pgrphash;
	397
1c79356b A	398	LIST_HEAD(proclist, proc);
	399	extern struct proclist allproc; /* List of all processes. */
	400	extern struct proclist zombproc; /* List of zombie processes. */
	401	extern struct proc initproc, kernproc;
9bccf70c A	402	extern void pgdelete __P((struct pgrp *pgrp));
	403	extern void sessrele __P((struct session *sess));
	404	extern void procinit __P((void));
e5568f75 A	405	__private_extern__ char proc_core_name(const char name, uid_t uid, pid_t pid);
	406	extern int proc_is_classic(struct proc *p);
	407	struct proc *current_proc_EXTERNAL(void);
9bccf70c A	408	#endif /* __APPLE_API_PRIVATE */
	409
	410	#ifdef __APPLE_API_UNSTABLE
1c79356b	411
e5568f75	412	extern int isinferior(struct proc , struct proc );
1c79356b	413	extern struct proc pfind __P((pid_t)); / Find process by id. */
55e303ae	414	__private_extern__ struct proc pzfind(pid_t); / Find zombie by id. */
1c79356b A	415	extern struct pgrp pgfind __P((pid_t)); / Find process group by id. */
	416
	417	extern int chgproccnt __P((uid_t uid, int diff));
	418	extern int enterpgrp __P((struct proc *p, pid_t pgid, int mksess));
	419	extern void fixjobc __P((struct proc p, struct pgrp pgrp, int entering));
	420	extern int inferior __P((struct proc *p));
	421	extern int leavepgrp __P((struct proc *p));
9bccf70c	422	#ifdef __APPLE_API_OBSOLETE
1c79356b	423	extern void mi_switch __P((void));
9bccf70c	424	#endif /* __APPLE_API_OBSOLETE */
1c79356b A	425	extern void resetpriority __P((struct proc *));
	426	extern void setrunnable __P((struct proc *));
	427	extern void setrunqueue __P((struct proc *));
	428	extern int sleep __P((void *chan, int pri));
	429	extern int tsleep __P((void chan, int pri, char wmesg, int timo));
9bccf70c A	430	extern int tsleep0 __P((void chan, int pri, char wmesg, int timo, int (*continuation)(int)));
9bccf70c A	431	extern int tsleep1 __P((void chan, int pri, char wmesg, u_int64_t abstime, int (*continuation)(int)));
1c79356b A	432	extern void unsleep __P((struct proc *));
1c79356b A	433	extern void wakeup __P((void *chan));
9bccf70c A	434	#endif /* __APPLE_API_UNSTABLE */
9bccf70c A	435
1c79356b A	436	__END_DECLS
1c79356b A	437
9bccf70c A	438	#ifdef __APPLE_API_OBSOLETE
	439	/* FreeBSD source compatibility macro */
	440	#define PRISON_CHECK(p1, p2) (1)
	441	#endif /* __APPLE_API_OBSOLETE */
	442
1c79356b A	443	#endif /* KERNEL */
	444
	445	#endif /* !_SYS_PROC_H_ */