/*
 * Copyright (c) 2000-2004 Apple Computer, Inc. All rights reserved.
 *
 * @APPLE_LICENSE_HEADER_START@
 * 
 * This file contains Original Code and/or Modifications of Original Code
 * as defined in and that are subject to the Apple Public Source License
 * Version 2.0 (the 'License'). You may not use this file except in
 * compliance with the License. Please obtain a copy of the License at
 * http://www.opensource.apple.com/apsl/ and read it before using this
 * file.
 * 
 * The 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, QUIET ENJOYMENT 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 KERNEL
#include <sys/kernel_types.h>
#endif
#include <mach/boolean.h>

#ifdef XNU_KERNEL_PRIVATE
#define PROC_DEF_ENABLED
#else
#ifndef KERNEL
#define PROC_DEF_ENABLED
#endif
#endif

#ifdef PROC_DEF_ENABLED

struct session;
struct pgrp;
struct proc;

/* 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 */
};


/* 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	0x00000001	/* Process may hold POSIX adv. lock */
#define	P_CONTROLT	0x00000002	/* Has a controlling terminal */
#define	P_LP64		0x00000004	/* Process is LP64 */
#define	P_NOCLDSTOP	0x00000008	/* No SIGCHLD when children stop */

#define	P_PPWAIT	0x00000010	/* Parent waiting for chld exec/exit */
#define	P_PROFIL	0x00000020	/* Has started profiling */
#define	P_SELECT	0x00000040	/* Selecting; wakeup/waiting danger */
#define	P_CONTINUED	0x00000080	/* Process was stopped and continued */

#define	P_SUGID		0x00000100	/* Has set privileges since last exec */
#define	P_SYSTEM	0x00000200	/* Sys proc: no sigs, stats or swap */
#define	P_TIMEOUT	0x00000400	/* Timing out during sleep */
#define	P_TRACED	0x00000800	/* Debugged process being traced */

#define	P_WAITED	0x00001000	/* Debugging prc has waited for child */
#define	P_WEXIT		0x00002000	/* Working on exiting. */
#define	P_EXEC		0x00004000	/* Process called exec. */

/* Should be moved to machine-dependent areas. */
#define	P_OWEUPC	0x00008000	/* Owe process an addupc() call at next ast. */

#define	P_AFFINITY	0x00010000	/* xxx */
#define	P_CLASSIC	0x00020000	/* xxx */
/*
#define	P_FSTRACE	0x10000	/ * tracing via file system (elsewhere?) * /
#define	P_SSTEP		0x20000	/ * process needs single-step fixup ??? * /
*/

#define	P_WAITING	0x00040000	/* process has a wait() in progress */
#define	P_KDEBUG	0x00080000	/* kdebug tracing on for this process */

#define	P_TTYSLEEP	0x00100000	/* blocked due to SIGTTOU or SIGTTIN */
#define	P_REBOOT	0x00200000	/* Process called reboot() */
#define	P_TBE		0x00400000	/* Process is TBE */
#define	P_SIGEXC	0x00800000	/* signal exceptions */

#define	P_BTRACE	0x01000000	/* process is being branch traced */
#define	P_VFORK		0x02000000	/* process has vfork children */
#define	P_NOATTACH	0x04000000
#define	P_INVFORK	0x08000000	/* 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_INMEM		0		/* Obsolete: retained for compilation */
#define	P_NOSWAP	0		/* Obsolete: retained for compilation */
#define	P_PHYSIO	0		/* Obsolete: retained for compilation */
#define	P_FSTRACE	0		/* Obsolete: retained for compilation */
#define	P_SSTEP		0		/* Obsolete: retained for compilation */

#endif /* PROC_DEF_ENABLED */

#ifdef KERNEL
__BEGIN_DECLS

extern proc_t kernproc;

extern int proc_is_classic(struct proc *p);
struct proc *current_proc_EXTERNAL(void);

extern int	msleep(void *chan, lck_mtx_t *mtx, int pri, const char *wmesg, struct timespec * ts );
extern void	unsleep(struct proc *);
extern void	wakeup(void *chan);
extern void wakeup_one(caddr_t chan);

/* proc kpis */
/* this routine returns the pid of the current process */
extern int proc_selfpid(void);
/* this routine returns the pid of the parent of the current process */
extern int proc_selfppid(void);
/* this routine returns sends a signal signum to the process identified by the pid */
extern void proc_signal(int pid, int signum);
/* this routine checks whether any signal identified by the mask are pending in the  process identified by the pid. The check is  on all threads of the process. */
extern int proc_issignal(int pid, sigset_t mask);
/* this routine returns 1 if the pid1 is inferior of pid2 */
extern int proc_isinferior(int pid1, int pid2);
/* this routine copies the process's name of the executable to the passed in buffer. It 
 * is always null terminated. The size of the buffer is to be passed in as well. This 
 * routine is to be used typically for debugging 
 */
void proc_name(int pid, char * buf, int size);
/* This routine is simillar to proc_name except it returns for current process */
void proc_selfname(char * buf, int size);

/* find a process with a given pid. This comes with a reference which needs to be dropped by proc_rele */
extern proc_t proc_find(int pid);
/* returns a handle to current process which is referenced. The reference needs to be dropped with proc_rele */
extern proc_t proc_self(void);
/* releases the held reference on the process */
extern int proc_rele(proc_t p);
/* returns the pid of the given process */
extern int proc_pid(proc_t);
/* returns the pid of the parent of a given process */
extern int proc_ppid(proc_t);
/* returns 1 if the process is marked for no remote hangs */
extern int proc_noremotehang(proc_t);
/* returns 1 is the process is marked for force quota */
extern int proc_forcequota(proc_t);

/* this routine returns 1 if the process is running with 64bit address space, else 0 */
extern int proc_is64bit(proc_t);
/* is this process exiting? */
extern int proc_exiting(proc_t);
/* this routine returns error is the process is not one with super user privileges */
int proc_suser(struct proc *p);
/* returns the ucred assicaited with the process; temporary api */
struct ucred * proc_ucred(struct proc *p);

/* LP64todo - figure out how to identify 64-bit processes if NULL procp */
extern int IS_64BIT_PROCESS(proc_t);
extern int proc_pendingsignals(struct proc *, sigset_t);
extern int proc_tbe(struct proc *);

#ifdef KERNEL_PRIVATE
extern int	tsleep(void *chan, int pri, const char *wmesg, int timo);
extern int	msleep1(void *chan, lck_mtx_t *mtx, int pri, const char *wmesg, u_int64_t timo);
#endif

__END_DECLS

#endif	/* KERNEL */

#endif	/* !_SYS_PROC_H_ */
